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So Kazama

Section

Graduate School of Engineering

Job title

Professor

Degree

博士（工学）（東北大学）

researchmap

https://researchmap.jp/read0184478

J-GLOBAL ID

200901028862471733

Research History 15

2011/04 - Present

静岡大学　客員教授
2010/04 - Present

Faculty of Engineering, Tohoku University　Professor
2011/09 - 2015/08

Curtin University　University Associate
2012/04 - 2014/03

京都大学防災研究所水資源環境研究センター　教授非常勤教授
2013/06 - 2013/09

Univerisyt of California　Visiting fellow
2011/07 - 2013/03

岐阜大学　非常勤講師
2009/04 - 2010/03

School of Engineering, Tohoku University　Associate Professor
2007/04 - 2009/03

Graduate School of Environmental Studies, Tohoku University　Associate Professor
2003/04 - 2007/03

Graduate School of Environmental Studies, Tohoku University　Associate Professor
2000/04 - 2004/03

Faculty of Engineering, Ibaraki University　助教授
1999/09 - 2003/03

Graduate School of Engineering　助教授
1999/07 - 1999/08

Asian Institute of Technology, School of Civil Engineering　Associate Professor
1997/08 - 1999/06

Asian Institute of Technology, School of Civil Engineering　Assistant Professor
1995/10 - 1997/08

筑波大学構造工学系　講師
1995/04 - 1995/09

東北大学情報科学研究科　助手

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Education 2

Tohoku University　Graduate School of Engineering　Department of Civil and Environmental Engineering

- 1995/03
Tohoku University　Faculty of Engineering　Department of Civil Engineering

- 1990/03

Committee Memberships 53

土木学会，地球環境委員会　委員

2012/06 - Present
土木学会，水工学委員会　委員

2010/04 - Present
土木学会，水工学委員会，水工学論文集編集小委員会　委員

2007/04 - Present
土木学会，東北支部　幹事

2007/04 - Present
土木学会　技術功労賞選考委員会委員

2021/06 - 2023/05
土木学会　論文集B部門合同編集小委員会委員長

2021/06 - 2023/05
土木学会　地球環境委員会副委員長

2021/06 - 2023/05
土木学会東北支部　幹事長

2021/04 - 2023/03
土木学会　論文賞選考委員会委員

2018/06 - 2020/05
土木学会　論文賞選考委員会VII部門主査

2018/06 - 2020/05
土木学会　論文賞選考委員会VII部門副査

2018/06 - 2020/05
土木学会　減災・防災委員会委員

2017/06 - 2019/05
土木学会　22世紀の国づくりプロジェクト委員

2018/06 - 2019/04
土木学会　論説委員会幹事長

2017/04 - 2019/03
土木学会水工学委員会　水害対策小委員会委員長

2017/04 - 2019/03
水文・水資源学会　総務委員会委員長

2016/04 - 2018/03
土木学会，水工学委員会，水文部会　部会長

2015/06 - 2017/05
水文・水資源学会総会　実行委員長

2016/04 - 2017/03
土木学会水工学講演会　実行委員長

2016/04 - 2017/03
水文・水資源学会，出版編集委員会　委員長

2014/07 - 2016/08
水文・水資源学会　理事

2014/07 - 2016/08
土木学会全国大会実行委員会　委員

2015/04 - 2016/03
土木学会全国大会実行委員会　委員

2015/04 - 2016/03
水文・水資源学会，国際誌編集委員会　副委員長

2012/07 - 2014/06
水文・水資源学会，国際誌編集委員会　副委員長

2012/07 - 2014/06
土木学会水工学講演会　実行委員長

2013/04 - 2014/03
土木学会水工学講演会　実行委員長

2013/04 - 2014/03
水文・水資源学会，財務委員会　委員

2010/04 - 2012/08
水文・水資源学会，研究調整委員会　委員長

2010/04 - 2012/08
水文・水資源学会，財務委員会　委員

2010/04 - 2012/08
水文・水資源学会，研究調整委員会　委員長

2010/04 - 2012/08
水文・水資源学会　理事

2008/04 - 2012/08
水文・水資源学会，表彰選考委員会　委員

2008/04 - 2012/08
水文・水資源学会，出版編集委員会　委員

2006/04 - 2010/03
土木学会，水工学委員会　幹事

2006/04 - 2010/03
土木学会，地球温暖化対策特別委員会　幹事

2008/04 - 2009/03
土木学会，論文集編集委員会部門Ｂ編集小委員会　委員

2006/04 - 2009/03
アジアの水環境ガバナンス国際フォーラム開催実行委員会　委員

2007/04 - 2008/03
土木学会全国大会実行委員会　委員

2007/04 - 2008/03
水文・水資源学会，総務委員会　委員

2006/04 - 2008/03
土木学会，東北支部　常任幹事

2006/04 - 2007/03
土木学会，研究企画委員会支部担当　オブザーバー

2006/04 - 2007/03
水文・水資源学会　出版・編集委員会副委員長

2004/10 - 2006/08
土木学会，地球環境水理小委員会　委員

2004/04 - 2006/03
土木学会水理委員会，水文部会　委員

2001/04 - 2006/03
土木学会，全国大会委員会学術小委員会　委員

2004/04 - 2005/03
土木学会学術講演会プログラム編成委員会　実行委員、編成担当

2004/04 - 2005/03
Asian Civil Engineering Coordinate Council　Secretary of Technical Committee II

2001/04 - 2004/03
アジア土木協議会　第二技術委員会幹事長

2001/04 - 2004/03
持続可能な水資源管理に関する国際会議　技術委員

2004/04 -
水文・水資源学会総会・研究発表会　実行委員、編成担当

2002/04 -
土木学会全国大会、講演部会　実行委員

2000/04 -
土木と環境に関する国際会議　実行委員

1999/04 -

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Professional Memberships 8

水環境学会
Asia Pacific Association of Hydrology and Water Resources
International Association of Hydrological Science
国際水資源学会 (IWRA)
国際水理学会(IAHR)
Japan Society of Hydrology and Water Resources
日本リモートセンシング学会
土木学会

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Research Interests 6

地球温暖化
Inundation
Flood
Watershed Environment
Water Resources
The Mekong River

Research Areas 1

Social infrastructure (civil Engineering, architecture, disaster prevention) / Hydroengineering / Hydrology

Awards 17

永年勤続委員

2021/10　仙台市
学術賞

2020/09　水文・水資源学会
支部長賞

2016/05　土木学会都北支部
地球環境優秀講演賞

2014/09/05　土木学会地球環境委員会
工学研究科長特別教育賞

2014/03　東北大学
Outstanding presentation

2010/11/09　日中韓地理学会（5th Japan-Korea-China Joint Conference on Gepgraphy）
年間優秀論文賞

2010/09/08　水環境学会
優秀成果

2010/09/07　河川環境管理財団
論文賞

2010/09/06　水文・水資源学会
技術開発賞

2010/05/14　土木学会東北支部
技術開発賞

2008/06　土木学会東北支部
石田（實）記念財団研究奨励賞

2007/10/26　石田（實）記念財団
UK-Japan Collaboration Awards -Flooding and Coastal Defences

2006/10　英国大使館
技術開発賞

2000/05　土木学会東北支部　水資源評価手法の開発が斬新だと評価された．
論文奨励賞

1995/08　水文・水資源学会
論文奨励賞

1994/05　土木学会東北支部
論文奨励賞

1993/06　日本リモートセンシング学会

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Papers 430

Assessment of Climate Change Adaptation Measures for Pluvial Flooding

Hayata Yanagihara, So Kazama

Climate Change Impacts and Adaptation Strategies in Japan　177-193　2025/03/05
Publisher: Springer Nature Singapore
DOI： 10.1007/978-981-96-2436-2_13 　
Evaluation of Flood Damage Reduction by Use of Irrigation Reservoirs Under Climate Change with the Worst Scenario

Atsuya Ikemoto, So Kazama, Hayata Yanagihara, Takeo Yoshida

Climate Change Impacts and Adaptation Strategies in Japan　195-206　2025/03/05
Publisher: Springer Nature Singapore
DOI： 10.1007/978-981-96-2436-2_14 　
Climate change effects on the localized heavy rainfall event in northern Japan in 2022: Uncertainties in a pseudo-global warming approach

Ryotaro Tahara, Yusuke Hiraga, So Kazama

Atmospheric Research　314　107780-107780　2025/03
Publisher: Elsevier BV
DOI： 10.1016/j.atmosres.2024.107780 　

ISSN： 0169-8095
ASSESSMENT OF EXPOSED POPULATION TO FLUVIAL FLOOD, PLUVIAL FLOOD, AND SLOPE FAILURE CONSIDERING CLIMATE AND POPULATION CHANGES ACROSS JAPAN

Tomoaki MATSUURA, Hayata YANAGIHARA, Atsuya IKEMOTO, So KAZAMA, Seiki KAWAGOE

Japanese Journal of JSCE　81　(16)　n/a-n/a　2025
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejj.24-16009 　

eISSN： 2436-6021
QUANTITATIVE EVALUATION OF THE ADAPTATION AND MITIGATION EFFECTS OF TREE CUTTING IN RIVER CHANNELS IN RESPONSE TO GLOBAL WARMING

Takaya KANEKO, Atsuya IKEMOTO, Hayata YANAGIHARA, So KAZAMA

Japanese Journal of JSCE　81　(16)　n/a-n/a　2025
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejj.24-16117 　

eISSN： 2436-6021
QUANTITATIVE ASSESSMENT OF THE IMPACT OF INUNDATION DAMAGE CAUSED BY RECENT FLOODS ON THE POPULATION USING DIFFERENCE-IN-DIFFERENCES

Hayata YANAGIHARA, Ayaka OKAMOTO, So KAZAMA, Yusuke HIRAGA, Jun YOSHIDA

Japanese Journal of JSCE　81　(16)　n/a-n/a　2025
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejj.24-16071 　

eISSN： 2436-6021
Hydrometeorology-wildfire relationship analysis based on a wildfire bivariate probabilistic framework in different ecoregions of the continental United States

Ke Shi, Yoshiya Touge, So Kazama

Agricultural and Forest Meteorology　358　110215-110215　2024/11
Publisher: Elsevier BV
DOI： 10.1016/j.agrformet.2024.110215 　

ISSN： 0168-1923
Land subsidence in Bangkok vicinity: Causes and long-term trend analysis using InSAR and machine learning

Sakina Ahmed, Yusuke Hiraga, So Kazama

Science of The Total Environment　946　174285-174285　2024/10
Publisher: Elsevier BV
DOI： 10.1016/j.scitotenv.2024.174285 　

ISSN： 0048-9697
Nationwide evaluation of changes in fluvial and pluvial flood damage and the effectiveness of adaptation measures in Japan under population decline

Hayata Yanagihara, So Kazama, Tao Yamamoto, Atsuya Ikemoto, Tsuyoshi Tada, Yoshiya Touge

International Journal of Disaster Risk Reduction　104605-104605　2024/06
Publisher: Elsevier BV
DOI： 10.1016/j.ijdrr.2024.104605 　

ISSN： 2212-4209
A comparative spatial analysis of flood susceptibility mapping using boosting machine learning algorithms in Rathnapura, Sri Lanka

Kumudu Madhawa Kurugama, So Kazama, Yusuke Hiraga, Chaminda Samarasuriya

Journal of Flood Risk Management　17　(2)　2024/03/07
Publisher: Wiley
DOI： 10.1111/jfr3.12980 　

ISSN： 1753-318X

eISSN： 1753-318X

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Abstract Identifying flood‐prone areas is essential for preventing floods, reducing risks, and making informed decisions. A spatial database with 595 flood inventory and 13 flood predictors were used to implement five boosting algorithms: gradient boosting machine (GBM), extreme gradient boosting, categorical boosting, logit boost, and light gradient boosting machine (LGBM) to map flood susceptibility in Rathnapura while evaluating trained model's generalizing ability and assessing the feature importance in flood susceptibility mapping (FSM). The model performance was evaluated using the F1‐score, kappa index, and area under curve (AUC) method. The findings revealed that all the models were effective in identifying the overall flood susceptibility trends while LightGBM model had superior results (F1‐score = 0.907, Kappa value = 0.813 and AUC = 0.970), securing the top scores across all performance metrics compared to the other models (for testing dataset). Based on kappa evaluation, most of the models had finer performance (AUC _min = 0.737) while LightGBM had moderate performance for predictions beyond the training region. According to the results, regions with lower altitudes and topographic roughness values, moderate rainfall, and proximity to rivers are more susceptible to flooding. This framework can be adapted for rapid FSM in data‐deficient regions.
DEVELOPMENT OF BASIC INFORMATION ON THE GROWTH OF VEGETATION IN RIVER CHANNELS USING SATELLITE IMAGES ACROSS JAPAN

Takuma YAMAKI, Hayata YANAGIHARA, Atsuya IKEMOTO, So KAZAMA

Japanese Journal of JSCE　80　(27)　n/a-n/a　2024
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejj.24-27046 　

eISSN： 2436-6021
EVALUATION OF FLOOD ADAPTATION AND MITIGATION MEASURES BY THE ORDER OF RIPARIAN VEGETATION REMOVAL

Hayata YANAGIHARA, Atsuya IKEMOTO, So KAZAMA, Shuichi KURE, Ryuto FUJISHITA

Japanese Journal of JSCE　80　(16)　n/a-n/a　2024
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejj.23-16121 　

eISSN： 2436-6021
日本全域河道位数データと河道マスクデータの整備

Tao YAMAMOTO, Tsuyoshi TADA, So KAZAMA

JOURNAL OF JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES　36　(4)　297-305　2023/11/05
Publisher: Japan Society of Hydrology and Water Resources
DOI： 10.3178/jjshwr.36.1812 　

ISSN： 0915-1389

eISSN： 1349-2853
Evaluation of an Adaptation Strategy for Flood Damage Mitigation Under Climate Change Through the Use of Irrigation Reservoirs in Japan

Atsuya Ikemoto, So Kazama, Takeo Yoshida, Hayata Yanagihara

Water Resources Management　37　(10)　4159-4175　2023/06/15
Publisher: Springer Science and Business Media LLC
DOI： 10.1007/s11269-023-03544-7 　

ISSN： 0920-4741

eISSN： 1573-1650

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Abstract This study performed flood analysis, considering the water storage of irrigation reservoirs, to realize flood control by reservoirs, which are traditional irrigation facilities. The effect on flood control was determined through flood analysis performed by varying the reservoir storage rates. Based on the flood analysis results, Japan’s flood damage costs were estimated. Using three Shared Socioeconomic Pathways (SSPs) (SSP1-2.6, SSP2-4.5, and SSP5-8.5), we evaluated the flood control potential of reservoirs under future climate conditions. When the reservoirs were empty, the damage cost reduction rate resulting from the use of reservoirs across Japan was small, ranging from 1.1% to 2.3%, but as the damage cost reduction rate did not change under all future scenarios, reductions in flood damage were not affected by changes in rainfall under future climate conditions. Moreover, some prefectures showed high damage cost reduction effects. In northern part of Japan and numerous prefectures in western Japan, the potential to reduce damage through flood control by irrigation reservoirs was high. Some prefectures experienced similar reduction levels as those under alternative adaptation strategies. In the Kanto region, flood control by irrigation reservoirs had low potential for reducing damages. Even among prefectures with low water storage capacities of irrigation reservoirs, the potential to mitigate the effect of damage was high.
Contrasting adaptive genetic consequences of stream insects under changing climate

Kei Nukazawa, Ming-Chih Chiu, So Kazama, Kozo Watanabe

Science of The Total Environment　872　162258-162258　2023/05
Publisher: Elsevier BV
DOI： 10.1016/j.scitotenv.2023.162258 　

ISSN： 0048-9697
STATISTICAL ANALYSIS OF MUNICIPAL POPULATION CHANGE AND THEIR FACTORS CAUSED BY FLOOD DAMAGE

Ayaka OKAMOTO, Hayata YANAGIHARA, So KAZAMA, Yusuke HIRAGA

Japanese Journal of JSCE　79　(27)　n/a-n/a　2023
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejj.23-27044 　

eISSN： 2436-6021
NATIONWIDE EVALUATION OF POTENTIAL FLOOD DAMAGE REDUCTION BY RIPARIAN VEGETATION REMOVAL IN JAPAN

Hayata YANAGIHARA, Atsuya IKEMOTO, So KAZAMA, Shuichi KURE, Ryuto FUJISHITA

Japanese Journal of JSCE　79　(27)　n/a-n/a　2023
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejj.23-27042 　

eISSN： 2436-6021
Multitemporal UAV surveys of geomorphological changes caused by postfire heavy rain in Kamaishi city, northeast Japan

Yoshiya Touge, Masashi Hasegawa, Masayoshi Minegishi, Seiki Kawagoe, So Kazama

CATENA　220　106702-106702　2023/01
Publisher: Elsevier BV
DOI： 10.1016/j.catena.2022.106702 　

ISSN： 0341-8162
Limit equilibrium method-based 3D slope stability analysis for wide area considering influence of rainfall

Kenta Tozato, Nilo Lemuel J. Dolojan, Yoshiya Touge, Shuichi Kure, Shuji Moriguchi, Seiki Kawagoe, So Kazama, Kenjiro Terada

Engineering Geology　308　106808-106808　2022/10
Publisher: Elsevier BV
DOI： 10.1016/j.enggeo.2022.106808 　

ISSN： 0013-7952
Spatial frequency analysis of annual extreme daily precipitation across Japan

Hajime Yanagisawa, So Kazama, Yoshiya Touge

Journal of Hydrology: Regional Studies　42　101131-101131　2022/08
Publisher: Elsevier BV
DOI： 10.1016/j.ejrh.2022.101131 　

ISSN： 2214-5818
Estimation of the effect of future changes in precipitation in Japan on pluvial flood damage and the damage reduction effect of mitigation/adaptation measures

Hayata Yanagihara, So Kazama, Tsuyoshi Tada, Yoshiya Touge

PLOS Climate　1　(7)　e0000039-e0000039　2022/07/11
Publisher: Public Library of Science (PLoS)
DOI： 10.1371/journal.pclm.0000039 　

eISSN： 2767-3200

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This study estimated the effect of changes in the amount of precipitation associated with climate change on pluvial flood damage and the effectiveness of mitigation and adaptation measures throughout Japan. First, the cost of damage caused by pluvial flooding was calculated based on extreme rainfall, assuming a situation in which river levels are high, and rainwater does not drain into the rivers. Additionally, extreme rainfall in future climates was estimated from the output values of five general circulation models. Then, using these figures for extreme rainfall, the cost of pluvial flood damage in future climates was estimated. Improving the maintenance level of inland water drainage facilities and converting buildings to a piloti design were selected as adaptation measures. The results showed that in the Representative Concentration Pathway (RCP) 8.5 scenario, the expected annual damage cost (EADC) in the late 21st-century climate (2081–2100) scenario increases to approximately 2.3 times that of the baseline climate (1981–2000). If climate change is mitigated to RCP 2.6, the EADC in the late 21st-century climate scenario is estimated to be reduced by 28% compared to the EADC in the RCP 8.5 scenario. It is also estimated that the EADC in future climates could be kept lower than in the baseline climate by taking multiple rather than single measures. However, in the RCP 8.5 scenario for the late 21st-century climate, even if multiple adaptation measures are taken, the EADC was estimated to increase by 9% compared to the EADC in the baseline climate.
Evaluation of historical wildfires in Tohoku region using satellite-based high-fire-severity index Peer-reviewed

Grace Puyang Emang, Yoshiya Touge, So Kazama

Journal of Disaster Research　17　(4)　507-515　2022/06

DOI： 10.20965/jdr.2022.p0507 　
Effects of Urban Development on Regional Climate Change and Flood Inundation in Jakarta, Indonesia

Priyambodoho Bambang Adhi, Kure Shuichi, Januriyadi Nurul Fajar, Farid Mohammad, Varquez Alvin Christopher Galang, Kanda Manabu, Kazama So

Journal of Disaster Research　17　(4)　516-525　2022/06/01
Publisher: Fuji Technology Press Ltd.
DOI： 10.20965/jdr.2022.p0516 　

ISSN： 1881-2473

eISSN： 1883-8030
Effects of Urban Development on Regional Climate Change and Flood Inundation in Jakarta, Indonesia

Bambang Adhi Priyambodoho, Shuichi Kure, Nurul Fajar Januriyadi, Mohammad Farid, Alvin Christopher Galang Varquez, Manabu Kanda, So Kazama

JOURNAL OF DISASTER RESEARCH　17　(4)　516-525　2022/06

DOI： 10.20965/jdr.2022.p0516 　

ISSN： 1881-2473

eISSN： 1883-8030
Nationwide evaluation of future flood damage considering land-use change associated with population change in Japan

Yanagihara Hayata, Kazama So, Tada Tsuyoshi, Yamamoto Tao, Touge Yoshiya

Proceeding of Annual Conference　35　51　2022
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.35.0_51 　
Estimation of Inland Flood Damage Based on Extreme Precipitation in Japan

Hayata Yanagihara, Tao Yamamoto, So Kazama

Proceedings of the 39th IAHR World Congress　2022
Publisher: International Association for Hydro-Environment Engineering and Research (IAHR)
DOI： 10.3850/iahr-39wc252171192022214 　
POTENTIAL OF IRRIGATION RESERVOIRS FOR FLOOD PREVENTION AND EVALUATION OF THE REDUCTION RATE OF FLOOD DAMAGE COST FOR EACH PREFECTURE

Atsuya IKEMOTO, So KAZAMA, Takeo YOSHIDA, Hayata YANAGIHARA, Yoshiya TOUGE

Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)　78　(2)　I_265-I_270　2022
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.78.2_i_265 　

eISSN： 2185-467X
CHANGES IN FLOOD DAMAGE THROUGHOUT JAPAN DUE TO CLIMATE CHANGE AND LAND-USE CHANGE USING SHARED SOCIOECONOMIC PATHWAYS

Hayata YANAGIHARA, So KAZAMA, Tsuyoshi TADA, Tao YAMAMOTO, Yoshiya TOUGE

Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)　78　(5)　I_387-I_395　2022
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejer.78.5_i_387 　

eISSN： 2185-6648
Streamflow maps for run-of-river hydropower developments in Japan Peer-reviewed

Ryosuke Arai, Yasushi Toyoda, So Kazama

Journal of Hydrology　127512-127512　2022/01
Publisher: Elsevier BV
DOI： 10.1016/j.jhydrol.2022.127512 　

ISSN： 0022-1694
Defining Homogeneous Drought Zones Based on Soil Moisture across Japan and Teleconnections with Large-Scale Climate Signals Peer-reviewed

Journal of Applied Meteorology and Climatology　61　(1)　43-60　2022/01
Publisher: American Meteorological Society
DOI： 10.1175/jamc-d-21-0133.1 　

ISSN： 1558-8424

eISSN： 1558-8432

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<title>Abstract</title> Droughts are widespread disasters worldwide and are concurrently influenced by multiple large-scale climate signals. This is particularly true over Japan, where drought has strong heterogeneity due to multiple factors such as monsoon, topography, and ocean circulations. Regional heterogeneity poses challenges for drought prediction and management. To overcome this difficulty, this study provides a comprehensive analysis of teleconnection between climate signals and homogeneous drought zones over Japan. First, droughts are characterized by simulated soil moisture from a land surface model during 1958–2012. The Mclust toolkit, distinct empirical orthogonal function, and wavelet coherence analysis are used, respectively, to investigate the homogeneous drought zone, principal component of each homogeneous zone, and teleconnection between climate signals and drought. Results indicate that nine homogeneous drought zones with different characteristics are defined and quantified. Among these nine zones, zone 1 is dominated by extreme drought events. Zones 2 and 6 are typical representatives of spring droughts, whereas zone 7 is wet for most of the period. The Hokkaido region is divided into wetter zone 4 and drier zone 9. Zones 3, 5, and 8 are distinguished by the topography. The analyses also reveal almost all nine zones have a high level of homogeneity, with more than 60% explained variance. Also, these nine zones are dominated by different large-scale climate signals: the Arctic Oscillation has the strongest impact on zones 1, 7, and 8; the influence of the North Atlantic Oscillation on zones 3, 4, and 6 is significant; zones 2 and 9 are both dominated by the Pacific decadal oscillation; and El Niño–Southern Oscillation dominates zone 5. The results will be valuable for drought management and drought prevention.
流量特性を用いた全球水文モデルのキャリブレーションに関する基礎的検討 Peer-reviewed

新井涼允, 豊田康嗣, 風間聡

土木学会論文集B1（水工学）　77　(2)　I_247-I_252　2021/12
融雪モデルと粒子フィルタを用いた米代川における融雪洪水予測 Peer-reviewed

黒澤祥一, 福島健一郎, 梅原有理子, 吉田天, 風間聡

土木学会論文集B1（水工学）　77　(2)　I_307-I_312　2021/12
日本全域における人口変動に伴う洪水・内水氾濫・斜面崩壊の曝露人口の変化 Peer-reviewed

柳原駿太, 風間聡, 川越清樹

土木学会論文集B1（水工学）　77　(2)　I_1375-I_1380　2021/12
REGIONAL EVALUATION OF POTENTIAL FLOOD DAMAGE REDUCTION BY PADDY FIELD DAM IN JAPAN Peer-reviewed

YANAGIHARA Hayata, YAMAMOTO Tao, KAZAMA So, TOUGE Yoshiya, CHAI Yikai, TADA Tsuyoshi

Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)　77　(5)　I_33-I_42　2021/09
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejer.77.5_i_33 　

eISSN： 2185-6648

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This study estimated the potential flood damage reduction effect by a paddy field dam throughout Japan. The inundation depth caused by flooding was calculated using a two-dimensional unsteady flow model. The flood damage cost was calculated by multiplying the asset value of the inundated land by the damage rate based on the inundation depth. A simple paddy field dam model, which could be applied to a wide area, was applied to whole Japan to reflect the rainwater storage function of the paddy field dam in the flood inundation analysis. If paddy fields throughout Japan were used for flood mitigation, flood damage cost was estimated to decrease by 6.5 %. The flood damage cost reduction rate due to the paddy field dam was the highest in Toyama prefecture, followed by Saga prefecture, Akita prefecture, Yamagata prefecture and Niigata prefecture. The comparison between the previous study and this study showed that reduction ratio of the flood damage cost by the paddy field dam was lower than that by land-use control, piloti building and improvement of flood-control level.
Morphological Changes Due to the Peak Flow and Seasonal Flow of the Babame River Peer-reviewed

Naing Cho Zin Zin, So Kazama, Terumichi Hagiharawa

77　(5)　I_85-I_92　2021/09
Proposal of hyetograph to simulate massive flood discharge Peer-reviewed

新井涼允, 新井涼允, 豊田康嗣, 佐藤隆宏, 大庭雅道, 風間聡

土木学会論文集 G(環境)(Web)　77　(5)　I_93-I_104　2021/09

ISSN： 2185-6648
Topographical Characteristics of Frequent Inland Water Flooding Areas in Tangerang City, Indonesia

Eilif Kurnia Deda Djamres, Daisuke Komori, So Kazama

Frontiers in Water　3　2021/08/13
Publisher: Frontiers Media S.A.
DOI： 10.3389/frwa.2021.661299 　

ISSN： 2624-9375
Automatic Load Balancing Using Bayesian Optimization for a Flood Simulation Code Peer-reviewed

14　(2)　1-12　2021/08

ISSN： 1882-7829
Runoff recession features in an analytical probabilistic streamflow model Peer-reviewed

Ryosuke Arai, Yasushi Toyoda, So Kazama

Journal of Hydrology　597　125745-125745　2021/06
Publisher: Elsevier BV
DOI： 10.1016/j.jhydrol.2020.125745 　

ISSN： 0022-1694
Integrated mapping of water-related disasters using the analytical hierarchy process under land use change and climate change issues in Laos Peer-reviewed

Sengphrachanh Phakonkham, So Kazama, Daisuke Komori

Natural Hazards and Earth System Sciences　21　(5)　1551-1567　2021/05/20

DOI： 10.5194/nhess-21-1551-2021 　

ISSN： 1561-8633

eISSN： 1684-9981
Evaluation of flood damage reduction throughout Japan from adaptation measures taken under a range of emissions mitigation scenarios Peer-reviewed

Tao Yamamoto, So Kazama, Yoshiya Touge, Hayata Yanagihara, Tsuyoshi Tada, Takeshi Yamashita, Hiroyuki Takizawa

Climatic Change　165　(3-4)　2021/04
Publisher: Springer Science and Business Media LLC
DOI： 10.1007/s10584-021-03081-5 　

ISSN： 0165-0009

eISSN： 1573-1480

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<title>Abstract</title>This study aimed to evaluate the impact of climate change on flood damage and the effects of mitigation measures and combinations of multiple adaptation measures in reducing flood damage. The inundation depth was calculated using a two-dimensional unsteady flow model. The flood damage cost was estimated from the unit evaluation value set for each land use and prefectures and the calculated inundation depth distribution. To estimate the flood damage in the near future and the late twenty-first century, five global climate models were used. These models provided daily precipitation, and the change of the extreme precipitation was calculated. In addition to the assessment of the impacts of climate change, certain adaptation measures (land-use control, piloti building, and improvement of flood control level) were discussed, and their effects on flood damage cost reduction were evaluated. In the case of the representative concentration pathway (RCP) 8.5 scenario, the damage cost in the late twenty-first century will increase to 57% of that in the late twentieth century. However, if mitigation measures were to be undertaken according to RCP2.6 standards, the increase of the flood damage cost will stop, and the increase of the flood damage cost will be 28% of that in the late twentieth century. By implementing adaptation measures in combination rather than individually, it is possible to keep the damage cost in the future period even below that in the late twentieth century. By implementing both mitigation and adaptation measures, it is possible to reduce the flood damage cost in the late twenty-first century to 69% of that in the late twentieth century.
A review of climate-change impact and adaptation studies for the water sector in Thailand Peer-reviewed

Masashi Kiguchi, Kumiko Takata, Naota Hanasaki, Boonlert Archevarahuprok, Adisorn Champathong, Eiji Ikoma, Chaiporn Jaikaeo, Sudsaisin Kaewrueng, Shinjiro Kanae, So Kazama, Koichiro Kuraji, Kyoko Matsumoto, Shinichiro Nakamura, Dzung Nguyen-Le, Keigo Noda, Napaporn Piamsa-Nga, Mongkol Raksapatcharawong, Prem Rangsiwanichpong, Sompratana Ritphring, Hiroaki Shirakawa, Chatuphorn Somphong, Mallika Srisutham, Desell Suanburi, Weerakaset Suanpaga, Taichi Tebakari, Yongyut Trisurat, Keiko Udo, Sanit Wongsa, Tomohito Yamada, Koshi Yoshida, Thanya Kiatiwat, Taikan Oki

Environmental Research Letters　16　(2)　023004-023004　2021/02/01

DOI： 10.1088/1748-9326/abce80 　

ISSN： 1748-9326

eISSN： 1748-9326
Changes in exposed population to river flooding, inland flooding, and slope failure with population change by Shared Socioeconomic Pathways in Japan

Yanagihara Hayata, Kazama So, Kawagoe Seiki

Proceeding of Annual Conference　34　12　2021
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.34.0_12 　
CHANGES IN EXPOSED POPULATION ON HIGH HAZARD AREAS OF SLOPE FAILURE, RIVER FLOOD AND INLAND FLOOD WITH FUTURE POPULATION BY SHARED SOCIOECONOMIC PATHWAYS IN JAPAN

Hayata YANAGIHARA, So KAZAMA, Seiki KAWAGOE

Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)　77　(2)　I_1375-I_1380　2021
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.77.2_i_1375 　

eISSN： 2185-467X
Improving the Accuracy of Snow and Hydrological Models Using Assimilation by Snow Depth Peer-reviewed

So Kazama, Koji Sakamoto, Golam Saleh Ahmed Salem, Shunsuke Kashiwa

Journal of Hydrologic Engineering　26　(1)　05020043-05020043　2021/01
Publisher: American Society of Civil Engineers (ASCE)
DOI： 10.1061/(asce)he.1943-5584.0002019 　

ISSN： 1084-0699

eISSN： 1943-5584
Evaluating potential flood mitigation effect of paddy field dam for Typhoon No.19 in 2019 in the Naruse River Basin Peer-reviewed

Yikai Chai, Yoshiya Touge, Ke Shi, So Kazama

土木学会論文集B1(水工学)　76　(1)　295-503　2020/12
根固めブロック周辺の浮遊砂堆積を促す効果的な配置方法の提案 Peer-reviewed

萩原照通, 会田俊介, 風間聡

土木学会論文集B1(水工学)　76　(2)　I_1189-I_1194　2020/11
ニューラルネットワークを利用した日本の最上流域における流量特性マップの作製 Peer-reviewed

新井涼允, 豊田康嗣, 風間聡

土木学会論文集B1(水工学)　76　(2)　I_391-I_396　2020/11
日本全域を対象とした極値降雨データに基づく内水リスクの推定およびその将来変化 Peer-reviewed

柳原駿太, 山本道, 風間聡, 峠嘉哉

土木学会論文集B1(水工学)　76　(2)　I_85-I_90　2020/11
Time-series transition of the community structure of aquatic insects at middle domain of Natori river basin in Miyagi Prefecture as revealed by eDNA metabarcoding analysis.

Noriko UCHIDA, Kengo KUBOTA, Shunsuke AITA, So KAZAMA

Ecology and Civil Engineering　23　(1)　21-36　2020/09/28
Publisher: Ecology and Civil Engineering Society
DOI： 10.3825/ece.23.21 　

ISSN： 1344-3755

eISSN： 1882-5974
Detecting Irrigation Effect on Surface Temperature using Modis and Land Surface Model in Whole Uzbekistan

Yoshiya Touge, Jacqueline Muthoni Mbugua, So Kazama, Temur Khujanazarov, Kenji Tanaka

International Geoscience and Remote Sensing Symposium (IGARSS)　4951-4954　2020/09/26
Publisher: Institute of Electrical and Electronics Engineers Inc.
DOI： 10.1109/IGARSS39084.2020.9324609 　
Evaluating Trees Crowns Damage for the 2017 Largest Wildfire in Japan Using Sentinel-2A NDMI

Grace Puyang Emang, Yoshiya Touge, So Kazama

International Geoscience and Remote Sensing Symposium (IGARSS)　6794-6797　2020/09/26
Publisher: Institute of Electrical and Electronics Engineers Inc.
DOI： 10.1109/IGARSS39084.2020.9323345 　
森林資源の活用を考慮した斜面に対するEco-DRRマップの開発 Peer-reviewed

川越清樹, 林誠二, 風間聡

土木学会論文集G（環境）　76　(5)　I_361-I_370　2020/09
Estimation of the mitigation and the landuse control for climate change based on the flood analysis in Japan Peer-reviewed

YAMAMOTO Tao, KAZAMA So, TOUGE Yoshiya, TADA Tsuyoshi, YAMASHITA Takeshi

Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)　76　(5)　I_141-I_150　2020/09
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejer.76.5_i_141 　

eISSN： 2185-6648

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This study evaluated the impact of flood damage caused by climate change and the effects of mitigation and adaptation measures. Using the two-dimensional unsteady flow model and the Flood Control Economic manual (by Ministry of Land, Infrastructure, Transport and Tourisum), the inundation depth and economic damage were calculated. In order to estimate the flood damage at the end of the 21st century, the rainfall in the future climate was obtained using 5 GCMs, and the future inundation depth and economic damage were obtained using these as input values. In addition, we focused on land use control as an adaptation measure, and examined the effect of reducing the amount of damage and the cost-benefit ratio (The social discount rate is 4.0%). It was estimated that the mitigation from RCP8.5 to RCP2.6 at the end of the 21st century would reduce the expected annual flood damage by 246.5 billion yen / year. It was estimated that adaptation measures by land use control, which regulates areas flooded by 3 m or more during floods with a return period of 200 years, would reduce expected annual damage by 26% in the current climate. The estimated cost-benefit ratio was 0.684 for the mitigation measures, while the cost-benefit ratio for land use control was estimated to be about 0.019.
CLIMATE CHANGE EFFECTS ON SNOWMELT RUNOFF IN SHOGAWA RIVER BASIN Peer-reviewed

新井涼允, 新井涼允, 豊田康嗣, 大庭雅道, 佐藤隆宏, 風間聡

土木学会論文集 G(環境)(Web)　76　(5)　I_109-I_120　2020/09

ISSN： 2185-6648
環境DNA解析に基づく宮城県名取川水系中流域における水生昆虫群集構造の時系列変化 Peer-reviewed

内田典子, 久保田健吾, 会田俊介, 風間聡

応用生態工学　23　(1)　21-36　2020/09
Aquatic insect community structure revealed by eDNA metabarcoding derives indices for environmental assessment Peer-reviewed

Noriko Uchida, Kengo Kubota, Shunsuke Aita, So Kazama

PeerJ　8　e9176-e9176　2020/06/11

DOI： 10.7717/peerj.9176 　

ISSN： 2167-8359

eISSN： 2167-8359
Effectiveness of Structural and Nonstructural Measures on the Magnitude and Uncertainty of Future Flood Risks Peer-reviewed

N. Fajar Januriyadi, So Kazama, Idham R. Moe, Shuichi Kure

Journal of Water Resource and Protection　12　(05)　401-415　2020/04
Publisher: Scientific Research Publishing, Inc.
DOI： 10.4236/jwarp.2020.125024 　

ISSN： 1945-3094

eISSN： 1945-3108
Evaluation of the impact of landfill on floodplain water quality in a tropical monsoon region Peer-reviewed

Yusuke Hiraga, So Kazama, Chaiwat Ekkawatpanit, Keitaro Yamada

Hydrological Research Letters　14　(1)　48-55　2020/03
Publisher: Japan Society of Hydrology and Water Resources
DOI： 10.3178/hrl.14.48 　

eISSN： 1882-3416
Estimations of streamflow characteristics throughout Japan using artificial neural network

Ryosuke Arai, Yasushi Toyoda, So Kazama

22nd Congress of the International Association for Hydro-Environment Engineering and Research-Asia Pacific Division, IAHR-APD 2020: "Creating Resilience to Water-Related Challenges"　2020
Publisher: International Association for Hydro-Environment Engineering and Research (IAHR)
ESTIMATION OF THE RISK OF INLAND FLOOD BASED ON EXTREME PRECIPITATION DATA CONSIDERING CLIMATE CHANGE IN JAPAN

Hayata YANAGIHARA, Tao YAMAMOTO, So KAZAMA, Yoshiya TOUGE

Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)　76　(2)　I_85-I_90　2020
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.76.2_i_85 　

eISSN： 2185-467X
気候変動による洪水被害額の推定におけるGCMと空間解像度の影響 Peer-reviewed

山本道, 風間聡, 峠嘉哉, 田中裕夏子, 多田毅, 山下毅

土木学会論文集B1（水工学）　75　(2)　I_1087-I_1092　2019/11
Publisher: 公益社団法人土木学会
ISSN： 1880-8751

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type:学術論文(Ariticle)
d4PDFと陸面過程モデルを用いた三陸地方における極端な土壌乾燥の将来変化予測 Peer-reviewed

峠嘉哉, Grace Puyang, Emang, 風間聡

土木学会論文集B1（水工学）　75　(2)　I_1057-I_1062　2019/11
ニューラルネットワークを利用した日本の未観測流域における流況推定 Peer-reviewed

新井涼允, 豊田康嗣, 風間聡

土木学会論文集B1（水工学）　75　(2)　I_307-I_312　2019/11
Detecition changes in irrigated area using multi-temporal MODIS and land surface model surface temperature within Amu Darya Delta Peer-reviewed

Jacqueline Muthoni Mbugua, Yoshiya Touge, So Kazama, Temur Khujanazarov, Kenji Tanaka

土木学会論文集B1（水工学）　75　(2)　I_277-I_281　2019/11
ASSESSMENT OF THE RISK ON FLOOD AND STORM SURGE WITH FLOOD CONTROL FACILITIES Peer-reviewed

田中裕夏子, 風間聡, 多田毅, 山下毅, 小森大輔

土木学会論文集 B1(水工学)(Web)　75　(2)　I_109-I_114　2019/11

ISSN： 2185-467X
確率論的流況推定手法の適応性評価と特性の把握 Peer-reviewed

新井涼允, 豊田康嗣, 風間聡

水文・水資源学会誌　32　(6)　301-317　2019/11
RELATIONSHIP BETWEEN STREAM INSECTS' BIOMASS AND ENVIRONMENTAL DNA DERIVED BY METABARCODING AND QUANTITATIVE PCR Peer-reviewed

UCHIDA Noriko, KUBOTA Kengo, AITA Shunsuke, KAZAMA So

Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)　75　(7)　Ⅲ_281-Ⅲ_288　2019/11
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejer.75.7_III_281 　

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 Invertebrate species DNA of the cytochrome oxidase subunit 1 region were quantified using environmental DNA (eDNA) extracted from river water using quantitative PCR (qPCR). Subsequently, metabarcoding was conducted to obtain the proportion of stream insects of six taxonomic orders (Ephemeroptera, Plecoptera, Trichoptera, Diptera, Odonata, Coleoptera) in the community. Finally, eDNA concentrations of the six taxonomic groups were calculated by multiplying the proportion of each taxonomy and the quantified invertebrate DNA concentration. As a result, aquatic insect eDNA concentrations displayed significant positive correlations with aquatic insect individuals collected by the conventional surber net sampling (Spearman's rank correlation = 0.74, p < 0.01). Furthermore, positive correlations were observed between the population densities and eDNA concentrations for orders Ephemeroptera, Plecoptera, and Dipetra. These results indicate that the combination of eDNA metabarcoding and qPCR can be an effective way to estimate the abundance of stream insect.
Origin of Carbon and Essential Fatty Acids in Higher Trophic Level Fish in Headwater Stream Food Webs Peer-reviewed

Megumu Fujibayashi, Yoshie Miura, Reina Suganuma, Shinji Takahashi, Takashi Sakamaki, Naoyuki Miyata, So Kazama

Biomolecules　9　(9)　487-487　2019/09/13

DOI： 10.3390/biom9090487 　

eISSN： 2218-273X
裸地小流域を対象としたUAVによる地表面温度の連続観測と放射量・土壌水分比較 Peer-reviewed

峠嘉哉, 峯岸優好, 長谷川匡, 川越清樹, 風間聡

土木学会論文集G（環境）　75　(5)　I_307-I_312　2019/09
Assessing NDVI based phenology in different fire severity in the Kamaishi 2017 forest fire Peer-reviewed

Grace Puyang Emang, Yoshiya Touge, So Kazama

土木学会論文集G（環境）　75　(5)　I_135-I_140　2019/09
気候変動による洪水被害に対する緩和策と適応策の評価 Peer-reviewed

山本直, 風間聡, 峠嘉哉, 多田毅, 山下毅

土木学会論文集G（環境）　75　(5)　I_15-I_24　2019/09
Publisher: 公益社団法人土木学会
ISSN： 2185-6648

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type:学術論文(Ariticle)
Evaluation of rainfall probability to hazard map in Laos PDR Peer-reviewed

Sengphrachanh Phrakonkham, So Kazama, Daisuke Komori, Sopha Soliya

38th IAHR World Congress - "Water: Connecting the World"　C　4457-4467　2019/09/01
Publisher: The International Association for Hydro-Environment Engineering and Research (IAHR)
DOI： 10.3850/38wc092019-0979 　
Evaluation of Soil Moisture Dryness Using Land Surface Model in the Case of Forest Fires in Tohoku 2017 Peer-reviewed

Yoshiya Touge, Grace Puyang Emang, So Kazama

38th IAHR World Congress - "Water: Connecting the World"　C　3822-3828　2019/09/01
Publisher: The International Association for Hydro-Environment Engineering and Research (IAHR)
DOI： 10.3850/38wc092019-1808 　
Remote Sensing for the Detection of Salinized Soil Using a Multispectral Sensor in the Zeravshan River Basin Peer-reviewed

Jacqueline Muthoni Mbugua, Yoshiya Touge, So Kazama, Temur Khujanazarov, Kenji Tanaka

38th IAHR World Congress - "Water: Connecting the World"　C　3635-3641　2019/09/01
Publisher: The International Association for Hydro-Environment Engineering and Research (IAHR)
DOI： 10.3850/38wc092019-1452 　
Analysis on Snow Accumulation and Groundwater Resources by a Distributed Hydrological Model Peer-reviewed

So Kazama, Koji Sakamoto, Yoshiya Touge

38th IAHR World Congress - "Water: Connecting the World"　D　2504-2509　2019/09/01
Publisher: The International Association for Hydro-Environment Engineering and Research (IAHR)
DOI： 10.3850/38wc092019-0921 　
The influence of antecedent rainfall to flashed flood in a mountainous river Peer-reviewed

Norihito Takahashi, So Kazama

38th IAHR World Congress - "Water: Connecting the World"　E　2135-2142　2019/09/01
Publisher: The International Association for Hydro-Environment Engineering and Research (IAHR)
DOI： 10.3850/38wc092019-1096 　
The Impact of Spatial Discretization Scale on Urban Hydrological Modeling Performance and Prediction Peer-reviewed

Chang Qing, So Kazama, Yoshiya Touge

38th IAHR World Congress - "Water: Connecting the World"　SS5　1170-1175　2019/09/01
Publisher: The International Association for Hydro-Environment Engineering and Research (IAHR)
DOI： 10.3850/38wc092019-0994 　
Evaluation of Time Series Trend of Total Phosphorus Concentration Distribution in Mekong River Floodplain Using Satellite Images Peer-reviewed

Keitaro Yamada, So Kazama

38th IAHR World Congress - "Water: Connecting the World"　C　673-680　2019/09/01
Publisher: The International Association for Hydro-Environment Engineering and Research (IAHR)
DOI： 10.3850/38wc092019-1316 　
The effects of spatial discretization on performances and parameters of urban hydrological model Peer-reviewed

Qing Chang, So Kazama, Yoshiya Touge, Shunsuke Aita

Water Science and Technology　80　(3)　517-528　2019/08/01
Publisher: IWA Publishing
DOI： 10.2166/wst.2019.296 　

ISSN： 0273-1223

eISSN： 1996-9732
盛土式津波避難施設『命山』と周辺家屋等との離隔距離についての基礎的検討 Peer-reviewed

瀬尾直樹, 原田賢治, 金原剛, 風間聡

土木学会論文集B2(海岸工学)　75　(1)　1-9　2019/03
Evaluation of cost and benefit of sediment based on landslide and erosion models Peer-reviewed

Prem Rangsiwanichpong, So Kazama, Chaiwat Ekkawatpanit, Luminda Gunawardhana

CATENA　173　194-206　2019/02

DOI： 10.1016/j.catena.2018.10.010 　
Estimation of the flood damage caused by climate change and effect of the land use regulation

Yamamoto Tao, Kazama So, Touge Yoshiya, Tada Tsuyoshi, Yamashita Takeshi

Proceeding of Annual Conference　32　114　2019
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.32.0_114 　
Continuous Measurement of Surface Temperature using UAV in Small Bare Mountainous Catchment and Comparison with Radiation and Soil Water Content

Yoshiya TOUGE, Masayoshi MINEGISHI, Masashi HASEGAWA, Seiki KAWAGOE, So KAZAMA

Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)　75　(5)　I_307-I_312　2019
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejer.75.i_307 　

eISSN： 2185-6648
Distributed Hydrological Model for Assessing Flood Hazards in Laos, Journal of Water Resource and Protection Peer-reviewed

Sengphrachanh Phrakonkham, So Kazama, Daisuke Komori, Soliya Sopha

Journal of Water Resource and Protection　11　(8)　937-958　2019
平成27年9月関東・東北豪雨におけるInstagramデータによる河川に対する認識と危険行動の解析 Peer-reviewed

安西聡, 風間聡, 峠嘉哉

土木学会論文集B1(水工学)　74　(5)　I_1309-I_1314　2018/11
流出解析による表面・底面融雪量検討と気象感度分析 Peer-reviewed

坂元宏司, 風間聡, 峠嘉哉

土木学会論文集B1(水工学)　74　(5)　I_307-I_312　2018/11
Assessme nt of sediment yield in Thailand using revised universal soil loss equation and geographic information system techniques Peer-reviewed

Prem Rangsiwanichpong, So Kazama, Luminda Gunawardhana

River Research and Applications　34　(9)　1113-1122　2018/11

DOI： 10.1002/rra.3351 　
Impacts of climate change on groundwater level and irrigation cost in a groundwater dependent irrigated region Peer-reviewed

Golam Saleh Ahmed Salem, So Kazama, Shamsuddin Shahid, Nepal C. Dey

Agricultural Water Management　208　33-42　2018/09/30
Publisher: Elsevier B.V.
DOI： 10.1016/j.agwat.2018.06.011 　

ISSN： 1873-2283 0378-3774
Estimation of sediment yield and benefit in northern part of Thailand using remote sensing data

Prem Rangsiwanichpong, So Kazama

Proceedings - International Association for Hydro-Environment Engineering and Research (IAHR)-Asia Pacific Division (APD) Congress: Multi-Perspective Water for Sustainable Development, IAHR-APD 2018　1　559-565　2018/09/01
Publisher: Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada
A sensitivity analysis of Storm Water Management Model in a residential area

Chang Qing, So Kazama, Yoshiya Touge

Proceedings - International Association for Hydro-Environment Engineering and Research (IAHR)-Asia Pacific Division (APD) Congress: Multi-Perspective Water for Sustainable Development, IAHR-APD 2018　1　139-146　2018/09/01
河川の認識調査と親水の活性化への方策の提案 Peer-reviewed

佐藤理久, 青沼ひかる, 安西聡, 末永夏子, 橋本彩子, 小金聡, 風間聡

水文・水資源学会誌　31　(5)　393-398　2018/09
衛星画像を用いたメコン河氾濫原における栄養塩分布の推定 Peer-reviewed

山田慶太郎, 風間聡, 会田俊介

土木学会論文集G(環境)　74　(5)　I_103-I_108　2018/09
Estimation of the Risk on Compound Water Related Disaster Peer-reviewed

田中裕夏子, 風間聡, 小森大輔

土木学会論文集 G(環境)(Web)　74　(5)　I_257-I_394　2018/09

ISSN： 2185-6648
新しい水質指標とInstagramデータの比較 Peer-reviewed

安西聡, 風間聡

土木学会論文集G(環境)　74　(5)　I_387-I_394　2018/09
盛土式津波避難施設『命山』の天端高設計手法－盛土建設後の浸水解析－ Peer-reviewed

瀬尾直樹, 原田賢治, 金原剛, 風間聡

土木学会論文集G(環境)　74　(5)　I_417-I_424　2018/09
Imapact of reclamation on the environment of the lower Mekong River Basin Peer-reviewed

Yusuke Hiraga, So Kazama, Chaiwat Ekkawatpanit, Yoshiya Touge

Journal of Hydrology: Regional Studies　18　143-155　2018/08

DOI： 10.1016/j.ejrh.2018.06.003 　

eISSN： 2214-5818
レーダー・アメダス解析雨量を用いた豪雨の空間分布特性の分析 Peer-reviewed

菅原雄太, 風間聡, 峠嘉哉

土木学会論文集B1(水工学)　74　(4)　343-348　2018/03
2017年東北山林火災における岩手県釜石市・宮城県栗原市の被害概要 Peer-reviewed

峠嘉哉, Grace Puyang, Emang, 風間聡, 高橋幸男, 佐々木健介

自然災害科学　39　(4)　361-370　2018/03
Adaptation assessment to future beach loss due to sea level rise in Thailand

Chatuphorn Somphong, Keiko Udo, Sompratana Ritphring, Hiroaki Shirakawa, So Kazama

Proceedings of the Coastal Engineering Conference　36　(2018)　2018
Publisher: American Society of Civil Engineers (ASCE)
ISSN： 0161-3782
Projections of Future Beach Loss due to Sea Level Rise for Sandy Beaches along Thailand’s Coastlines Peer-reviewed

Sompratana Ritphring, Chatuphorn Somphong, Keiko Udo, So Kazama

Journal of Coastal Research　85　541-545　2018
Distributed probability of slope failure in Thailand under climate change Peer-reviewed

Komori Daisuke, Rangsiwanichpong Prem, Inoue Naotatsu, Ono Keisuke, Watanabe Satoshi, Kazama So

CLIMATE RISK MANAGEMENT　20　126-137　2018

DOI： 10.1016/j.crm.2018.03.002 　

ISSN： 2212-0963
Evaluation of future flood risk in Asian megacisties: a case of Jakarta Peer-reviewed

Nurul Fajar Januriyadi, So Kazama, Idham R. Moe, Shuichi Kure

Hydrological Research Letters　12　(3)　14-22　2018

DOI： 10.3178/hrl.12.14 　

eISSN： 1882-3416
Estimation of periphyton dynamics in a temperate catchment using a distributed nutrient-runoff model Peer-reviewed

So Kazama, Kengo Watanabe

Ecological Modelling　367　1-9　2018/01
Publisher: Elsevier BV
DOI： 10.1016/j.ecolmodel.2017.11.006 　

ISSN： 0304-3800
大阪市における内水氾濫頻発区域の分布とその特性 Peer-reviewed

中口幸太, 小森大輔, 井上亮, 風間聡

水文・水資源学会誌　31　(1)　9-16　2018/01

DOI： 10.3178/jjshwr.31.9 　

ISSN： 0915-1389
Groundwater-dependent irrigation costs and benefits for adaptation to global change Peer-reviewed

Golam Saleh Ahmed Salem, So Kazama, Shamsuddin Shahid, Nepal C. Dey

Mitigation and Adaptation Strategies for Global Change　23　1-27　2017/11/19
Publisher: Springer Netherlands
DOI： 10.1007/s11027-017-9767-7 　

ISSN： 1573-1596 1381-2386
Analysing the relationship between ocean indices and rainfall in the Chao Phraya River Basin Peer-reviewed

Prem Rangsiwanichpong, So Kazama, Chaiwat Ekkawatpanit

INTERNATIONAL JOURNAL OF CLIMATOLOGY　37　230-238　2017/08

DOI： 10.1002/joc.4997 　

ISSN： 0899-8418

eISSN： 1097-0088
Estimation of direct and indirect impacts of climate change on groundwater level in a groundwater dependent irrigation region Peer-reviewed

Golam Salem, Ahmed Salem, So Kazama, Shawsuddin Shahid

Proceedings of the 37th IAHR World Congress　6　(A)　4346-4353　2017/08
Estimation of spatial flood damage costs in Jakarta, Indonesia Peer-reviewed

Nurul F. Januriyadi, Sotephen G., So Kazama, Idham R. Moe, Shuichi Kure

Proceedings of the 37th IAHR World Congress　2　(D)　2343-2349　2017/08
Assessment of special flood risk using distributed hydrological model in Laos Peer-reviewed

Sengphrachanh Phrakonkham, So Kazama, Daisuke Komori

Proceedings of the 37th IAHR World Congress　2　(A)　1731-1739　2017/08
ソーシャルメディアを用いた河川関心度評価 Peer-reviewed

川守田智, 安西聡, 風間聡

水文・水資源学会誌　30　(4)　209-220　2017/07
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.3178/jjshwr.30.209 　

ISSN： 0915-1389

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&emsp;To understand public's image of rivers and to use it for future river management, social media data were analyzed. Among data of various social media, Instagram data were chosen for their real-time nature with low noise. Data were collected through hash-tag searches with hash-tags related to rivers such as #river or #Hirose-river. Through text mining and analyses of images and the number of posts, five unique outcomes were archived. First, river interest originates from private business and events. Secondly, an observed number of river users and their purposes do not always correspond with those estimated from Instagram data. Thirdly, with the index defined as the number of posts with #river-name per basin population, touristic rivers such as Shimanto River and Niyodo River have an 8-50 times higher index than the average, which indicates that tourism contributes greatly to river interest. Fourth, compared to posts with #river and posts with #mountain, #river posts concentrated on July and August and rivers do not mention particular names of places, although mountain lovers aim at a particular mountain. Finally, playing in shallow river water areas is popular.
Optimum Abstraction of Groundwater for Sustaining Groundwater Level and Reducing Irrigation Cost Peer-reviewed

Golam Saleh Ahmed Salem, So Kazama, Daisuke Komori, Shamsuddin Shahid, Nepal C. Dey

WATER RESOURCES MANAGEMENT　31　(6)　1947-1959　2017/04

DOI： 10.1007/s11269-017-1623-8 　

ISSN： 0920-4741

eISSN： 1573-1650
Future projection of flood inundation considering land-use changes and land subsidence in Jakarta Peer-reviewed

Idham Riyando Moe, Shuichi Kure, Nurul Fajar Januriyadi, Mohammad Farid, Keiko Udo, So Kazama, Shunichi Koshimura

Hydrological Research Letters　11　(2)　99-105　2017/04

DOI： 10.3178/hrl.11.99 　

ISSN： 1882-3416
Impact of temperature changes on groundwater levels and irrigation costs in a groundwater-dependent agricultural region in Northwest Bangladesh Peer-reviewed

Golam Saleh Ahmed Salem, So Kazama, Shamsuddin Shahid, Nepal C. Dey

Hydrological Research Letters　11　(1)　85-91　2017/03/25
Publisher: Japan Society of Hydrology and Water Resources
DOI： 10.3178/HRL.11.85 　

ISSN： 1882-3416
平成28年台風第10号による二級河川小本川での洪水発生状況の考察 Peer-reviewed

風間聡, 峠嘉哉, 高橋範仁

土木学会論文集B1(水工学)　73　(4)　I_1303-I_1308　2017/03
Publisher:
DOI： 10.2208/jscejhe.73.I_1303 　

ISSN： 1880-8751
分布型栄養塩流出モデルを用いた名取川流域の付着藻類量推定 Peer-reviewed

渡邊健吾, 風間聡

土木学会論文集B1(水工学)　73　(4)　I_1153-I_1158　2017/03
Publisher:
DOI： 10.2208/jscejhe.73.I_1153 　

ISSN： 1880-8751
小川原湖におけるヤマトシジミの生息範囲評価について Peer-reviewed

岩間浩司, 藤原博通, 長崎勝康, 濱田正隆, 風間聡

土木学会論文集B1(水工学)　73　(4)　I_1129-I_1134　2017/03
Publisher:
DOI： 10.2208/jscejhe.73.I_1129 　

ISSN： 1880-8751
メコン河下流域における洪水氾濫と純一次生産力の関係 Peer-reviewed

平賀優介, 風間聡, 峠嘉哉

土木学会論文集B1(水工学)　73　(4)　I_307-I_312　2017/03

DOI： 10.2208/jscejhe.73.I_307 　

ISSN： 2185-467X
メコン河氾濫原の干拓が流域環境に及ぼす影響評価 Peer-reviewed

平賀優介, 風間聡, 峠嘉哉

土木学会論文集B1(水工学)　73　(4)　I_283-I_288　2017/03
Publisher:
DOI： 10.2208/jscejhe.73.I_283 　

ISSN： 1880-8751
年最小気圧を用いた複合災害潜在被害額の将来推定 Peer-reviewed

秋間将宏, 風間聡, 峠嘉哉, 多田毅

土木学会論文集B1(水工学)　73　(4)　I_139-I_144　2017/03

DOI： 10.2208/jscejhe.73.I_139 　

ISSN： 2185-467X
室内融雪実験による地温勾配の一次元解析 Peer-reviewed

齋藤優人, 風間聡, 会田俊介

土木学会論文集B1(水工学)　73　(4)　I_25-I_30　2017/03

DOI： 10.2208/jscejhe.73.I_25 　
The potential role of urban green areas for controlling ground surface and subsurface warming Peer-reviewed

Luminda Niroshana Gunawardhana, So Kazama

URBAN WATER JOURNAL　14　(1)　34-44　2017

DOI： 10.1080/1573062X.2015.1057177 　

ISSN： 1573-062X

eISSN： 1744-9006
Catchment-scale modeling of riverine species diversity using hydrological simulation: application to tests of species-genetic diversity correlation Peer-reviewed

Kei Nukazawa, So Kazama, Kozo Watanabe

ECOHYDROLOGY　10　(1)　2017/01

DOI： 10.1002/eco.1778 　

ISSN： 1936-0584

eISSN： 1936-0592
砂防堰堤のスリット化に伴う生息場と底生動物群集の時系列変化 Peer-reviewed

糠澤桂, 林達也, 風間聡, 高橋真司

土木学会論文集G(環境)　72　(7)　III_553-III_558　2016/11

DOI： 10.2208/jscejer.72.III_553 　
Modelling melt, runoff, and mass balance of a tropical glacier in the Bolivian Andes using an enhanced temperature-index model Peer-reviewed

Pablo Fuchs, Yoshihiro Asaoka, So Kazama

Hydrological Research Letters　10　(2)　51-59　2016/04/21
Publisher: Japan Society of Hydrology and Water Resources
DOI： 10.3178/hrl.10.51 　

ISSN： 1882-3416
再現確率にもとづく洪水氾濫・高潮複合災害潜在被害額推定 Peer-reviewed

秋間将宏, 風間聡, 小森大輔

土木学会論文集B1(水工学)　72　(4)　I_1267-I_1272　2016/03/15

DOI： 10.2208/jscejhe.72.I_1267 　

ISSN： 2185-467X
メコン河の洪水氾濫規模と農業生産性の関係 Peer-reviewed

天野文子, 風間聡

土木学会論文集B1(水工学)　72　(4)　I_1207-I_1212　2016/03/15

DOI： 10.2208/jscejhe.72.I_1207 　
地形情報を用いたボリビア・アンデス山脈における氷河後退の統計解析 Peer-reviewed

吉澤一樹, 風間聡, 朝岡良浩

土木学会論文集B1(水工学)　72　(4)　I_469-I_474　2016/03/15

DOI： 10.2208/jscejhe.72.I_469 　
水文モデルと底生動物の生息場モデルを用いた河川健全度パターンの評価 Peer-reviewed

糠澤桂, 風間聡, 渡辺幸三

土木学会論文集B1(水工学)　72　(4)　I_433-I_438　2016/03/15

DOI： 10.2208/jscejhe.72.I_433 　
Evaluation of Flood Inundation in Jakarta Using Flood Inundation Model Calibrated by Radar Rainfall Peer-reviewed

I. Moe, S. Kure, M. Farid, K. Udo, S. Kazama, S. Koshimura

Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)　72　(4)　I_1243-I_1248　2016/03

DOI： 10.2208/jscejhe.72.I_1243 　
Report on the Annual Conference of Japan Society of Hydrology and Water Resources in 2016

KAZAMA So

Journal of Japan Society of Hydrology and Water Resources　29　(6)　395-399　2016
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.3178/jjshwr.29.395 　

ISSN： 0915-1389
Effects of land use change and land subsidence on flood inundation in Jakarta

Kure Shuichi, Moe Idham, Januriyadi Nurul, Kazama So

Proceeding of Annual Conference　29　107-107　2016
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.29.0_107 　

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Floods are considered to be one of the major natural disasters in Indonesia. Jakarta in Indonesia has experienced many floods in the past, such as those in 1996, 2002, 2007, 2013, 2014 and 2015. In this paper, land subsidence and land use change problems contributing to flooding in Jakarta were described and historical land subsidence and land use/cover situations in Jakarta were reconstructed. Also, those land subsidence and land use/cover change impacts were analyzed by using a flood inundation model.
PROJECTED ADAPTIVE GENETIC DEGRADATION IN A CADDISFLY SPECIES UNDER CHANGING CLIMATES Peer-reviewed

Kei Nukazawa, So Kazama, Kozo Watanabe

11TH INTERNATIONAL SYMPOSIUM ON ECOHYDRAULICS　2016
EFFECT OF LAND SUBSIDENCE ON FLOOD INUNDATION IN JAKARTA, INDONESIA Peer-reviewed

Idham Riyando MOE, Shuichi KURE, Nurul Fajar JANURIYADI, Mohammad FARID, Keiko UDO, So KAZAMA, Shunichi KOSHIMURA

土木学会論文集G（環境）　72　(5)　283-289　2016

DOI： 10.2208/jscejer.72.I_283 　
2015 年 9 月東北豪雨による渋井川洪水氾濫の特徴 Peer-reviewed

呉修一, 森口周二, 堀合孝博, 小森大輔, 風間聡, 田中仁

日本自然災害科学　35　(2)　87-103　2016

ISSN： 0286-6021
Variation in benthic invertebrate abundance along thermal gradients within headwater streams of a temperate basin in Japan Peer-reviewed

Ryosuke Arai, Kei Nukazawa, So Kazama, Yasuhiro Takemon

HYDROBIOLOGIA　762　(1)　55-63　2015/12

DOI： 10.1007/s10750-015-2336-8 　

ISSN： 0018-8158

eISSN： 1573-5117
Opportunities and constraints in adapting to flood and drought conditions in the Upper Chao Phraya River basin in Thailand Peer-reviewed

Weerayuth Pratoomchai, So Kazama, Chaiwat Ekkawatpanit, Daisuke Komori

International Journal of River Basin Management　13　(4)　413-427　2015/10/02
Publisher: Taylor and Francis Ltd.
DOI： 10.1080/15715124.2015.1013036 　

ISSN： 1814-2060 1571-5124

eISSN： 1814-2060
Assessment of future variability in extreme precipitation and the potential effects on the wadi flow regime Peer-reviewed

Luminda Niroshana Gunawardhana, Ghazi A. Al-Rawas, So Kazama, Khalid A. Al-Najar

ENVIRONMENTAL MONITORING AND ASSESSMENT　187　(10)　1-19　2015/10

DOI： 10.1007/s10661-015-4851-5 　

ISSN： 0167-6369

eISSN： 1573-2959
Sharing of people's Perceptions of Past and Future Hydro-Meteorological Changes in the Groundwater Use Area Peer-reviewed

Weerayuth Pratoomchai, So Kazama, Sujata Manandhar, Chaiwat Ekkawatpanit, Somkid Saphaokham, Daisuke Komori, Jaray Thongduang

WATER RESOURCES MANAGEMENT　29　(10)　3807-3821　2015/08

DOI： 10.1007/s11269-015-1030-y 　

ISSN： 0920-4741

eISSN： 1573-1650
メコン河氾濫原におけるリン輸送モデルの構築および肥沃効果と農業への影響評価 Peer-reviewed

天野文子, 風間聡

土木学会論文集B1(水工学)　71　(4)　I_1189-I_1194　2015/03/12
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.71.I_1189 　

ISSN： 2185-467X

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To evaluate fertilization effect of the Mekong River flood and inundation, we modeled phosphorus transport. Using this model, fertilization effect and effect of inundation on agriculture were evaluated. We obtained the following conclusions; 1) Settling velocity of phosphorus was calibrated to 0.25m/day. 2) Considering wind effect for settling velocity of phosphorus improve the model especially at the edge of flood plain. 3) Fertilization effect was evaluated spatially and quantitatively. Except for some edge areas of flood plain there are fertilization effect. 4) Effect of inundation on agriculture was evaluated spatially and quantitatively. Some areas need application of fertilizer for current production.
Local people's perceptions of climate change and related hazards in mountainous areas of northern Thailand Peer-reviewed

Sujata Manandhar, Weerayuth Pratoomchai, Keisuke Ono, So Kazama, Daisuke Komori

INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION　11　47-59　2015/03

DOI： 10.1016/j.ijdrr.2014.11.002 　

ISSN： 2212-4209
NUMERICAL SIMULATION OF FLOODING IN JAKARTA AND EVALUATION OF A COUNTER MEASURE TO MITIGATE FLOOD DAMAGE Peer-reviewed

Idham Riyando MOE, Shuichi KURE, Keiko UDO, So KAZAMA, Shunichi KOSHIMURA

土木学会論文集G（環境）　71　(5)　29-35　2015
Publisher:
DOI： 10.2208/jscejer.71.I_29 　
A hydrothermal simulation approach to modelling spatial patterns of adaptive genetic variation in four stream insects Peer-reviewed

Kei Nukazawa, So Kazama, Kozo Watanabe

JOURNAL OF BIOGEOGRAPHY　42　(1)　103-113　2015/01

DOI： 10.1111/jbi.12392 　

ISSN： 0305-0270

eISSN： 1365-2699
Simulating thermal pollution caused by a hypothetical groundwater heat pump system under different climate, operation and hydrogeological conditions Peer-reviewed

Luminda Niroshana Gunawardhana, So Kazama, Ghazi A. Al-Rawas

Geothermal Energy　3　(1)　2015/01/01
Publisher: SpringerOpen
DOI： 10.1186/s40517-015-0037-1 　

ISSN： 2195-9706
Assessment of rainfall-induced shallow landslides in Phetchabun and Krabi provinces, Thailand Peer-reviewed

Keisuke Ono, So Kazama, Chaiwat Ekkawatpanit

NATURAL HAZARDS　74　(3)　2089-2107　2014/12

DOI： 10.1007/s11069-014-1292-3 　

ISSN： 0921-030X

eISSN： 1573-0840
複数の全球気候モデルを用いた源流域における底生動物個体数密度の将来変化 Peer-reviewed

糠澤桂, 新井涼允, 風間聡, 竹門康弘

土木学会論文集G(環境)　70　(5)　I_271-I_276　2014/09/05
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejer.70.I_271 　

ISSN： 2185-6648

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To understand impacts of global warming on benthos communities in stream ecosystems, we analyzed relations of macroinvertebrate densities to water temperature conditions in a set of headwater reaches with various altitude, ranging from 100 to 850m, within the Natori River System. We ran a distributed hydro-thermal model with input data of air temperature in future scenarios (near and far future) and projected changes in water temperature in the headwater reaches in the futures using 8 global climate models (GCMs). We projected the density of benthic macroinvertebrates in the futures using the estimated water temperature as a predictor variable of simple linear regression models obtained in the headwater reaches under present conditions. Considering lower marginal ranges in uncertainty of the density of Plecoptera, it might decrease as much as 85% of present densities or extinct even in the near future with the lowest or highest radiative forcing, respectively.
氷河融解・質量収支モデルを用いた熱帯Huayna Potosi West氷河の将来展望 Peer-reviewed

吉澤一樹, 朝岡良浩, Pablo Fuchs, 風間聡

土木学会論文集G(環境)　70　(5)　I_219-I_226　2014/09/05
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejer.70.I_219 　

ISSN： 2185-6648

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Meltwater is one of the valuable water resources in LaPaz and ElAlto, Bolivia. We conducted simulations of glacier variation of Huayna Potosi West Glacier, Bolivia (16ºS) under the current climate condition and three types of global warming conditions. The simulation is carried out for thirty years. Mass balance and glacial melt were estimated for each 50m elevation zone with Enhanced Temperature Index (ETI) model. Four type of meteorological dataset for the input to ETI model are produced; one assume current climate condition based on observation and the other three assume temperature rise ratio of 0.024, 0.034 and 0.044°C/year derived from general circulation models. Simulation under the current climate condition shows that glacial area and meltwater decrease to 4% and 52% of present by the end of next three decades. Accumulation and abluation area reach equilibrium condition by next one decade. The other simulations under different temperature rise also show that glacier does not disappear in the next three decades although the response of glacier shrinking to climate change becomes high with temperature rise. Glacial area decrease by 21-44% of present by the end of next three decades. Annual meltwater is 12% increase to 39% reduction. There are large uncetainties of glacier metl for 30years due to high altitudinal distribution of glacieal area around Equilibriun-Line Altitude.
タイにおける豪雨に伴う斜面崩壊危険度の将来予測 Peer-reviewed

井上尚達, 風間聡, 小森大輔

土木学会論文集G(環境)　70　(5)　I_183-I_188　2014/09/05

DOI： 10.2208/jscejer.70.I_183 　
気候変動下の洪水と高潮の複合災害リスク推定 Peer-reviewed

三澤公希, 風間聡, 鈴木武, 有働恵子, 手塚翔也

土木学会論文集G(環境)　70　(5)　I_95-I_100　2014/09/05
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejer.70.I_95 　

ISSN： 2185-6648

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The damage caused by various disaster phenomena was quantified in the form of map information, and these economic damages were estimated on 2 disasters, namely flood and storm surge . Map information and GCM data were utilized after the data formats were unified. The estimated costs of these disasters were calculated in current, 2050 and 2100 climates by using several GCM modesls and climate scenarios. The probability of simultaneous incidence of these 2 disasters was estimated using the influence functions. The influence functions were estimated by the relations between air pressure and high tide and between air pressure and precipitation. This probability of simultaneous incidence was involved. The damage under current-climate was estimated to 78 billion YEN, which is 1.4 times biggher than flood statistics. The damages will be between 1.1 trillion YEN and 1.2 trillion YEN under 2050 climate and 1.2 trillion YEN and 1.4 trillion YEN under 2100 climate.
Estimation of the effects of climate change on flood-triggered economic losses in Japan Peer-reviewed

S. Tezuka, H. Takiguchi, S. Kazama, A. Sato, S. Kawagoe, R. Sarukkalige

INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION　9　58-67　2014/09

DOI： 10.1016/j.ijdrr.2014.03.004 　

ISSN： 2212-4209
水生生物の生息場適性度と遺伝的多様性の関係 Peer-reviewed

糠澤桂, 風間聡, 高瀬陽彦, 渡辺幸三

土木学会論文集B1(水工学)　70　(4)　I_1405-I_1410　2014/03/06
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.70.I_1405 　

ISSN： 2185-467X

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We evaluated the linkage between genetic diversity and habitat suitability index (HSI) of aquatic animals including freshwater fishes, amphibians and macroinvertebrates in the Natori River basin located at the middle of Miyagi prefecture. The HSI has been structured by variables calculated from a distributed hydro-thermal model and GIS based geographical variables. We found a strong positive correlation between genetic diversity and HSI in one caddisfly (Hydropsychidae), indicating that a prospective habitat (i.e., locality which has high HSI) might contribute to increase in genetic diversity. The genetic diversity of one caddisfly (Hydropsychidae) had significant positive correlations with the HSIs of predatory fishes and aquatic insects. This result suggests that exposures to predation pressure can enhance genetic diversity. We derived negative correlations between genetic diversity and the HSIs within niche competitors, suggesting inter-species selective pressure constrains intra-species genetic diversity.
水温環境の変化に伴う源流域における底生動物群集の将来変化 Peer-reviewed

新井涼允, 糠澤桂, 風間聡, 竹門康弘

土木学会論文集B1(水工学)　70　(4)　I_1303-I_1308　2014/03/06
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.70.I_1303 　

ISSN： 2185-467X

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As expected global increase in stream temperature triggered by climate change would alter benthic community composition of streams, it is necessary to understand the future variation of benthic invertevrates. First, we developed simple linear regression model to estimate the density of invertebrates by a water temperature metric as predictor variable. These data for the model were monthly collected during May-October within headwater streams which were homogenous in hydro-morphological characteristics. Secondly, we projected water temperature distribution within this basin for the two period in future using a distributed hydro-thermal simulation model which needed GCM data as inputs. Finally, we projected the variation of the density of benthic assemblage based on the regression model by annual mean of water temperature.
分布型水文モデルと確率密度関数を用いた底生動物の生息環境および種多様性評価 Peer-reviewed

高瀬陽彦, 糠澤桂, 風間聡, 渡辺幸三

土木学会論文集B1(水工学)　70　(4)　I_1297-I_1302　2014/03/06
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.70.I_1297 　

ISSN： 2185-467X

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This study quantitatively evaluated Habitat Suitability Index (HSI) and species diversity of benthic invertebrates using a distributed hydro-thermal model and observed benthic samples from 45 localities in the Natori River basin, Northeast of Japan. We applied probability density function and histogram analysis to the Suitability Index (SI) model analysis. To evaluate basin-scaled habitat values of invertebrate families, we used the index Weight Usable Ratio (WUR). From the viewpoint of repeatability in the multiple modeling manners, Diptera had the highest WUR in basin. We estimated spatial distribution of Shannon-Weiner diversity index based on the HSIs to evaluate species diversity throughout the basin. Results in the both applications showed that regions found in the top 80% of the diversity index were allocated from the upper to the middle stream.
極値降雨，流出量に基づく洪水被害推定およびその将来変化 Peer-reviewed

手塚翔也, 小野桂介, 風間聡, 小森大輔

土木学会論文集B1(水工学)　70　(4)　I_439-I_444　2014/03/06

DOI： 10.2208/jscejhe.70.I_1501 　

ISSN： 2185-467X
月最少降水量と無降雨期間に着目した渇水期の流出特性評価 Peer-reviewed

菊池秀哉, 風間聡, 朝岡良浩

土木学会論文集B1(水工学)　70　(4)　I_439-I_444　2014/03/06
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.70.I_439 　

ISSN： 2185-467X

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This paper described Runoff Characteristics in drought period based on Minimum monthlyPrecipitation and Continuous dry days. Therefore, we conducted during September 2005 to August 2007 in the upper Iwaki catchment, Japan with distributed snowmelt runoff model. As the result of the analysis with Continuous dry days, the runoff analysis shows precipitation in July and August have an impact on lack of river discharge, but shows precipitation in June don't have an impact on river discharge because snow contribute to discharge. Moreover, river discharge has decreased about 5m3/s when continuous dry days have 21 days in July. So these shows drought event probability get higher when timing of the appearance of continuous dry days are increasing distance from snowmelt season.
Development and application of hydrological and geomorphic diversity measures for mountain streams with check and slit-check dams Peer-reviewed

Ji Hyun Kang, So Kazama

JOURNAL OF HYDRO-ENVIRONMENT RESEARCH　8　(1)　32-42　2014/03

DOI： 10.1016/j.jher.2013.05.002 　

ISSN： 1570-6443

eISSN： 1876-4444
Adaptive Genetic Divergence along Narrow Environmental Gradients in Four Stream Insects Peer-reviewed

Kozo Watanabe, So Kazama, Tatsuo Omura, Michael T. Monaghan

PLOS ONE　9　(3)　e93055　2014/03

DOI： 10.1371/journal.pone.0093055 　

ISSN： 1932-6203
A projection of groundwater resources in the Upper Chao Phraya River basin in Thailand Peer-reviewed

Weerayuth Pratoomchai, So Kazama, Naota Hanasaki, Chaiwat Ekkawatpanit, Daisuke Komori

Hydrological Research Letters　8　(1)　20-26　2014/01/22
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.3178/hrl.8.20 　

ISSN： 1882-3416

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Depletion of groundwater is expected due to climate change. This study describes a catchment-scale study on projected groundwater recharge and storage in the Upper Chao Phraya River basin under changing climate scenarios. The period from 2026 to 2040 was assessed using climate projection results from global climate models (GCMs). Three GCMs, namely MIROC-ESM-CHEM (MIROC), HadGEM2-ES (HadGEM), and GFDL-ESM2M (GFDL), were used along with four greenhouse gas emission scenarios, namely RCP2.6, RCP4.5, RCP6.0, and RCP8.5, as the climate change conditions. The projected changes in groundwater recharge and storage were quantified as percent differences from the simulated recharge and storage for the reference period (1986–2000). A significant trend of decreasing mean monthly rainfall from April to June was detected for the HadGEM and the GFDL models. This change in rainfall pattern was projected to reduce the mean annual groundwater recharge (storage) by −12.9% (−1.46 km³), −9.7% (−1.35 km³), −13.9% (−1.49 km³), and −10.7% (−1.38 km³) for the RCP 2.6, 4.5, 6.0, and 8.5 scenarios, respectively. Based on the results of the relative change in groundwater storage, we expect that groundwater resources will be affected by climate change and that both groundwater recharge and storage will be reduced.
Evaluation of nutrient condition and agricultural production in the inundation areas of the Mekong River Peer-reviewed

Ayako Amano, So Kazama

Environmental Hydraulics　375-378　2014/01/09
Climate change impact on surface water flow variation in Sri Lanka during past decades Peer-reviewed

Samarasuriya Patabendige Chaminda, So Kazama

Environmental Hydraulics　232-235　2014/01/08
An evaluation of groundwater resources for the agricultural water requirements in the lower Yom and Nan River Basins in Thailand Peer-reviewed

Weerayuth Pratoomchai, So Kazama, Naota Hanasaki, Chaiwat, Ekkaawatpanit, Daisuke Komori

Environmental Hydraulics　118-121　2014/01/07
Future Projection of Surface Area and Meltwater of Tropical Glaciers in Bolivia

Yoshizawa Kazuki, Asaoka Yoshihiro, Kazama So

Proceeding of Annual Conference　27　100015-100015　2014
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.27.0_100015 　

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Meltwater from glacier is one of the valuable water resources in LaPaz and ElAlto cities, Bolivia. We conducted simulations of surface area and meltwater of Condoriri, Tuni and Huayna Potosi West (HPW) Glaciers, Bolivia (16°S) under the current climate condition and three types of global warming conditions. The simulation is carried out for thirty years. Mass balance and glacial melt were estimated for each 50m elevation zone with Enhanced Temperature Index (ETI) model. Simulation under the current climate condition shows that glacial area and meltwater decrease to 49% and 69% of present by the end of next three decades. The other simulations under different temperature rise(0.024, 0.034, 0.044°C/year) also show that glacier does not disappear in the next three decades although the response of glacier shrinking to climate change becomes high with temperature rise. Glacial area and meltwater decrease to 48-71% and 66-74% of present by the end of next three decades.
Application of Hydrological models to other research fields

Kazama So

Proceeding of Annual Conference　27　100074-100074　2014
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.27.0_100074 　

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In the last decade, exchange of researches between hydrology and other fields has been active and some new disciplines have grown up. Here are three examples of our researches applying hydrological models to other fields. First, habitats of aquatic animals were evaluated using outputs of a physical distributed runoff model and high accurate estimations of this method for different animals were obtained. Secondly economical methods with a hydrological model were applied to inundation areas in the lower Mekong River. The couple of models calculated agricultural benefits and industrial damage by flooding and investigated urbanization effects in inundation areas. Price as index to evaluate effects on water is useful for comprehensive analysis. Third example is application of health field. This is a combination of a dose response model and a hydrological model and expresses a risk map of waterborne infectious disease. In spite of useful model combinations, observations, measurements and analysis are more important to understand primitive phenomenon. We have to continue to develop fundamental researches.
Water Conflict Risk due to Water Resource Availability and Unequal Distribution Peer-reviewed

N. K. Gunasekara, S. Kazama, D. Yamazaki, T. Oki

WATER RESOURCES MANAGEMENT　28　(1)　169-184　2014/01

DOI： 10.1007/s11269-013-0478-x 　

ISSN： 0920-4741

eISSN： 1573-1650
Projection of extreme-rainfall-induced landslide in Thailand Peer-reviewed

Vanvisa Mama, Naotatsu Inoue, Chaiwat Ekkawatpanit, Phonchai Klinkhachorn, Somkid Saphaokham, Thattanaporn Khomsri, Kanokporn Boochabun, Teerawat Senahan, Keisuke Ono, So Kazama, Daisuke Komori

Proceedings of The 5th Natural Convention on Water Resources Engineering　5　(155)　1-8　2013/09/05
Short-term river response and restoration of biological diversity following slit construction Peer-reviewed

Ji Hyun Kang, So Kazama

JOURNAL OF HYDRO-ENVIRONMENT RESEARCH　7　(3)　161-173　2013/09

DOI： 10.1016/j.jher.2013.05.003 　

ISSN： 1570-6443

eISSN： 1876-4444
Evaluation and Study of Flood Damage Reduction for Future Flood Control Use of Irrigation Reservoirs in the View of Local

Atsuya Ikemoto, So Kazama, Takeo Yoshida, Hayata Yanagihara

Proceedings of the 40th IAHR World Congress. Rivers � Connecting Mountains and Coasts　2013/08/25
Publisher: The International Association for Hydro-Environment Engineering and Research (IAHR)
DOI： 10.3850/978-90-833476-1-5_iahr40wc-p1306-cd 　

ISSN： 2521-716X
Evaluation of High-Floor Houses for Pluvial Floods in Japan

Hayata Yanagihara, So Kazama, Tsuyoshi Tada

Proceedings of the 40th IAHR World Congress. Rivers � Connecting Mountains and Coasts　2013/08/25
Publisher: The International Association for Hydro-Environment Engineering and Research (IAHR)
DOI： 10.3850/978-90-833476-1-5_iahr40wc-p0309-cd 　

ISSN： 2521-716X
An investigation of extreme daily rainfall in the Mekong River Basin using a gridded precipitation dataset Peer-reviewed

Keisuke Ono, So Kazama, Luminda Niroshana Gunawardhana, Koichiro Kuraji

Hydrological Research Letters　7　(3)　66-72　2013/06/28

DOI： 10.3178/hrl.7.66 　
Evaluation of the inequality of water resources Peer-reviewed

Chaiwat Ekkawatpanit, So Kazama, Masaki Sawamoto, Priyantha Ranjan Sarukkalige

PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-WATER MANAGEMENT　166　(6)　303-314　2013/06

DOI： 10.1680/wama.11.00050 　

ISSN： 1741-7589
Temporal glacier area changes correlated with the El Niño/La Niña Southern Oscillation using satellite imagery Peer-reviewed

Kairi Morizawa, Yoshihiro Asaoka, So Kazama, Luminda Niroshana Gunawardhana

Hydrological Research Letters　7　(2)　18-22　2013/04/18
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.3178/hrl.7.18 　

ISSN： 1882-3416

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We used Landsat satellite images to determine the areal change between 1988 and 2010 of the Condoriri glacier in Bolivia and found that the area decreased by 41% during that period. Moreover, the interannual pattern of recession and expansion of the glacier coincided with warm and cold phases of El Niño/La Niña-Southern Oscillation (ENSO), respectively. Because the glacier recedes more during El Niño events than it expands during La Niña events, the net result is a retreating trend, which, if it continues, means that the glacier will disappear completely by 2035. ENSO frequency increased during the latter part of the 20th century, and ENSO events may become more frequent with continued climate change. Therefore, it is urgent to take measures to adapt Bolivian water management to the loss of glacier meltwater.
Evaluation of diarrhea disease risk attributed to inundation water use on a local scale in Cambodia using hydrological model simulations Peer-reviewed

Ayako Amano, Taisuke Sakuma, So Kazama, Luminda Gunawardhana

River Systems　20　(3-4)　185-196　2013/04/01
Publisher: Schweizerbart
DOI： 10.1127/1868-5749/2012/0064 　

ISSN： 1868-5749
極値降雨と極値流出の関係に基づいた洪水被害分布推定 Peer-reviewed

手塚翔也, 小野桂介, 風間聡

土木学会論文集B1(水工学)　69　(4)　I_1603-I_1608　2013/03
Publisher:
DOI： 10.2208/jscejhe.69.I_1603 　

ISSN： 1880-8751
HSI種多様性に基づく流域の遺伝的多様性空間分布の予測 Peer-reviewed

糠澤桂, 風間聡, 渡辺幸三

土木学会論文集B1(水工学)　69　(4)　I_1303-I_1308　2013/03
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.69.I_1303 　

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In accordance with a most recent report in discipline "landscape genetics", simulation studies to predict spatial genetic variation are urgently required. We evaluated relationships between genetic diversities of caddisfly Hydropsyche orientalis and species diversity calculated from Habitat Suitability Index (HSI) of aquatic animals and discussed outliers in the correlation diagrams in the Natori River basin located at the middle of Miyagi prefecture. Omitting two significant outliers, we developed spatial genetic diversity distribution maps on the basis of linear regression models in the correlation diagrams. At the catchment scale, the longitudinal distribution of genetic diversity had high peak in the middle stream. The result is identical with the observed pattern of genetic diversity for the species. The prediction has advantages which can be applied to future planning in respect of dam removal, urban planning, and zoning in view of genetic diversity.
水温が源流域の水生昆虫に与える影響 Peer-reviewed

新井涼允, 糠澤桂, 風間聡

土木学会論文集B1(水工学)　69　(4)　I_1279-I_1284　2013/03
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.69.I_1279 　

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It is necessary to detect accurate effects of benthic invertebrates’ communities on water temperature. Headwaters in mountains enable to detect accurate effects of benthic invertebrates on only water temperature. In order to evaluate the impacts of benthic invertebrates on water temperature, we investigated the quantitative relationship between water temperature and benthic invertebrates in the headwaters of the Natori River basin located at the middle of Miyagi prefecture. As results, the population of benthic invertebrates has a positive correlation with the number of taxa (R²=0.59, p<0.01). The Sorensen similarity index decreased significantly with the water temperature difference expanding (R²=0.15, p<0.01). The population densities of Plecoptera decreased significantly with the water temperature rising (R²=0.25, p<0.01).
分布型流出・水温モデルを使用した水生昆虫の生息環境評価 Peer-reviewed

高瀬陽彦, 糠澤桂, 風間聡, 渡辺幸三

土木学会論文集B1(水工学)　69　(4)　I_1255-I_1260　2013/03
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.69.I_1255 　

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We evaluated spatial variations of habitat suitability of nine aquatic insects in the Natori River basin, Northeast Japan quantitatively combining dual approaches of using Habitat Suitability Index (HSI) model analysis and hydrothermal simulation model. We also developed a new index of the Weighted Usable Ratio (WUR) for evaluating the overall habitat suitability throughout the catchment for each species. The results of spatial distributions of HSI showed species-specific patterns such as wide distribution of digit grids with high HSI throughout the catchment in habitat generalists (e.g., Baetis, WUR=0.55) while the constrained distribution in habitat specialists (e.g., Limnocentropus insolitus, WUR=0.06). Overall, the spatial variation of HSI showed good consistency with the empirical habitat distributions, supporting the accuracy of our model approach.
統計的および力学的解析手法を用いた豪雨時の表層崩壊危険度評価 Peer-reviewed

小野桂介, 風間聡

土木学会論文集B1(水工学)　69　(4)　I_925-I_930　2013/03
Publisher:
DOI： 10.2208/jscejhe.69.I_925 　

ISSN： 1880-8751
メコン河氾濫原における栄養塩の季節変化と肥沃効果の評価 Peer-reviewed

天野文子, 風間聡

土木学会論文集B1(水工学)　69　(4)　I_499-I_504　2013/03
Publisher:
DOI： 10.2208/jscejhe.69.I_499 　

ISSN： 1880-8751
夏季涵養型氷河の熱収支特性と積雪の影響 -アンデス熱帯氷河の事例- Peer-reviewed

朝岡良浩, 山崎剛, 宮田俊介, 風間聡, Edson RAMIREZ

土木学会論文集B1(水工学)　69　(4)　I_427-I_432　2013/03
Publisher:
DOI： 10.2208/jscejhe.69.I_427 　

ISSN： 1880-8751
衛星画像とアルベド実測値を併用した氷河域のアルベド推定 Peer-reviewed

森澤海里, 朝岡良浩, 風間聡

土木学会論文集B1(水工学)　69　(4)　I_427-I_432　2013/03
Publisher:
DOI： 10.2208/jscejhe.69.I_421 　

ISSN： 1880-8751
Estimation of glacier melt in the tropical Zongo with an enhanced temperature-index model Peer-reviewed

Pablo FUCHS, Yoshihiro ASAOKA, So KAZAMA

Journal of Japan Society of Civil Engineers, Ser.B1 (Hydraulic Engineering)　69　(4)　I_187-I_192　2013/03

DOI： 10.2208/jscejhe.69.I_187 　
Modeling of nutrient transport and evaluation of sustainability of agriculture in the Mekong River flood plain

amano ayako, kazama so

Proceeding of Annual Conference　26　268-268　2013
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.26.0.268.0 　

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Objective of this study is to model nutrient transport and evaluate fertilization effect of flood and sustainability of agriculture in the Mekong River flood plain. Nutrient transport model is numerical model and consists of flood simulation and nutrient transport simulation. Nutrient is considered to transport at a uniform rate f. Contribution ratio of flood to rice production is calculated by using result of the model. Because the contribution ratio can be considered a fertilization index, fertilization evaluated quantitatively. Sustainability of agriculture is spatially indicated by evaluate the contribution ratio.
Assessment of rainfall-induced shallow landslides using statistical and physical model

Ono Keisuke, Kazama So

Proceeding of Annual Conference　26　212-212　2013
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.26.0.212.0 　

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Shallow landslide induced by heavy rainfall events represents one of the most disastrous hazards in mountainous regions, like Japan. This paper described a hazard assessment of rainfall-induced shallow landslides on a regional scale using a statistically-based and physically-based model. The models were applied to a case study of the heavy-rainfall event in July 2004 in Niigata Prefecture. The results were as follows. 1) In the model-training area (the Tochio area), in either of the models, the correspondence between the areas, where the model predicts a high-hazard condition, and the localization of the shallow landslide events was considered satisfactory from a qualitative point of view. 2) In the model-validation area (The Izumozaki area), the physically-based model predicted the hazard of shallow landslides better than the statistically-based model.
Relationsip between Aquatic Insects Habitats and Envieonmental Factors Using Hydrological Simulation Model Peer-reviewed

Takase Akihiko, Nukazawa Kei, Kazama So, Watanabe Kozo

PROCEEDINGS OF THE 35TH IAHR WORLD CONGRESS, VOLS I AND II　2611-2617　2013
Water Temperature Effects Of Benthic Invertebrates In The Natori River Basin Peer-reviewed

Arai Ryosuke, Nukazawa Kei, Kazama So, Takemon Yasuhiro

PROCEEDINGS OF THE 35TH IAHR WORLD CONGRESS, VOLS I AND II　2779-2787　2013
The effects of country-level population policy for enhancing adaptation to climate change Peer-reviewed

N. K. Gunasekara, S. Kazama, D. Yamazaki, T. Oki

Hydrology and Earth System Sciences　17　(11)　4429-4440　2013

DOI： 10.5194/hess-17-4429-2013 　

ISSN： 1027-5606 1607-7938
An ecological assessment of a dammed pool formed by a slit check dam Peer-reviewed

Ji Hyun Kang, So Kazama

International Journal of River Basin Management　10　(4)　331-340　2012/12
Publisher: Informa UK Limited
DOI： 10.1080/15715124.2012.727826 　

ISSN： 1571-5124

eISSN： 1814-2060
河川生物のHSI種多様性と遺伝的多様性の関係性について Peer-reviewed

糠澤桂, 風間聡, 渡辺幸三

土木学会論文集G（環境）　68　(7)　III_603-III_610　2012/11/28
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejer.68.III_603 　

ISSN： 2185-6648

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Relationships between species diversity calculated from Habitat Suitability Index (HSI) of aquatic animalms and genetic diversities of four species of aquatic insect (three caddisflies and one mayfly) were examined in the Natori River basin, middle of Miyagi prefecture Japan. The HSI has been evaluated for six riverine animals based on current velocity and water depth calculated from an existing distributed runoff model and geographical data (eg., landuse, slope, and urban ratio) by Kazama et al. (2007). As a result, three out of four genetic diversity indices of one caddisfly (Hydropsyche orientalis) showed significant positive correlation to the HSI based taxa richness. This result suggests a sharing influence of immigration on community and population levels is potentially high in the locations where many species can coinhabit. Accordingly, parallel effects of gene flow and habitat heterogeneity on species and genetic diversity through environmental filtering and local adaptation of genotypes of focal species would contribute to the enhancement of biodiversity.
衛星画像を用いたコンドリリ氷河のアルベドの空間挙動推定 Peer-reviewed

森澤海里, 朝岡良浩, 風間聡

土木学会論文集G(環境)　68　(5)　I_153-I_158　2012/09/13

DOI： 10.2208/jscejer.68.I_153 　
タイ王国ペチャブン県における降雨に伴う表層崩壊ハザードマップの作成 Peer-reviewed

小野桂介, 風間聡, 手塚翔也

土木学会論文集G(環境)　68　(6)　I_273-I_278　2012/09/13

DOI： 10.2208/jscejer.68.I_273 　
Using subsurface temperatures to derive the spatial extent of the land use change effect Peer-reviewed

Luminda Niroshana Gunawardhana, So Kazama

JOURNAL OF HYDROLOGY　460　40-51　2012/08

DOI： 10.1016/j.jhydrol.2012.06.042 　

ISSN： 0022-1694

eISSN： 1879-2707
Relationship between Discharge and Nutrient Concentration in Inundation Areas in Cambodia Peer-reviewed

Ayako AMANO, So KAZAMA

Journal of Water and Environment Technology　10　(2)　165-175　2012/06/30
Publisher: Japan Society on Water Environment
DOI： 10.2965/jwet.2012.165 　

ISSN： 1348-2165

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We analyzed the monthly data of discharge, ammonium, total phosphorus, and potassium in the lower Mekong River to discuss the applicability of the rating curve function to estimate the nutrient concentration and to understand the inundation effects for nutrient expansion. The various sources of nutrient in the upstream directly affected the water quality in the downstream. Although the sedimentation amount depends on the discharge affecting deposition and erosion, ammonium and potassium directly reached the lower Mekong area because there was no correlation between discharge and these water quality parameters. Therefore, we cannot apply the rating curve function for nutrient water quality in the lower Mekong River.
A comparison of historical land-use change patterns and recommendations for flood plain developments in three delta regions in Southeast Asia Peer-reviewed

Myat Myat Thi, Luminda Niroshana Gunawardhana, So Kazama

Water International　37　(3)　218-235　2012/05

DOI： 10.1080/02508060.2012.687511 　

ISSN： 0250-8060

eISSN： 1941-1707
Statistical and numerical analyses of the influence of climate variability on aquifer water levels and groundwater temperatures: The impacts of climate change on aquifer thermal regimes Peer-reviewed

Luminda Niroshana Gunawardhana, So Kazama

GLOBAL AND PLANETARY CHANGE　86-87　66-78　2012/04

DOI： 10.1016/j.gloplacha.2012.02.006 　

ISSN： 0921-8181

eISSN： 1872-6364
A water availability and low-flow analysis of the Tagliamento River discharge in Italy under changing climate conditions Peer-reviewed

L. N. Gunawardhana, S. Kazama

Hydrology and Earth System Sciences　16　(3)　1033-1045　2012/03/30

DOI： 10.5194/hess-16-1033-2012 　

ISSN： 1027-5606

eISSN： 1607-7938
Hydrological response to future climate change in the Tagliamento River in Italian ALPS Peer-reviewed

Luminda Gunawardhana, So Kazama

Annual Journal of Hydraulic Engineering　56　I_241-I_246　2012/03
メコン河洪水氾濫の肥沃化について Peer-reviewed

天野文子, 風間聡

水工学論文集　56　I_1459-I_1464　2012/03
全国のAMeDAS観測点におけるDegree-Day法および融雪係数の検証 Peer-reviewed

宮田俊介, 朝岡良浩, 風間聡

水工学論文集　56　I_343-I_348　2012/03
同化手法を用いた山岳域の積雪分布推定 Peer-reviewed

柏俊輔, 朝岡良浩, 風間聡

水工学論文集　56　I_331-I_336　2012/03
Assessing the investigation of streamflow source areas through uncertainty evaluation of numerical experiments in small catchments Peer-reviewed

Freddy Soria, So Kazama

HYDROLOGICAL PROCESSES　26　(6)　907-931　2012/03

DOI： 10.1002/hyp.8304 　

ISSN： 1099-1085
Numerical investigations on the relationships between watershed characteristics and water balance model parameters: searching for universal relationships among regional relationships Peer-reviewed

Yoshiyuki Yokoo, So Kazama

HYDROLOGICAL PROCESSES　26　(6)　843-854　2012/03

DOI： 10.1002/hyp.8299 　

ISSN： 0885-6087
Earth fill dams research report on damage and water influence due to gigantic earthquake

Kawagoe Seiki, Kazama So, Ono Keisuke, Yokoo Yoshiyuki, Ushiyama Motoyuki, Masumoto Takao, Sento Noriaki

Proceeding of Annual Conference　25　204　2012
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.25.0.204.0 　

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A gigantic earthquake, now known as the Great East Japan Earthquake, with a magnitude of 9.0, the maximum ever recorded in Japan, struck the Tohoku region of Japan on 11th March, 2011. Of the 210,000 reservoirs in Japan, the design guidelines and construction methods of at least 20,000 of them are less than adequate at the present time. Built in 1949, the Fujinuma dam was 17.5 m in height and 133.0 m in length and stored 1,504,000 m3 of water. When the disaster struck, the Fujinuma reservoir was almost completely full in order to meet the demands of the upcoming irrigation season. The failure at Fujinuma dam, however, provides researchers with a rare opportunity to learn about the mechanism of earth-fill dam failure in a region of seismic activity. The resulting flash flood eliminated parts of forest and collected a large weight of sediment from the paddy fields, and this resulted in significant damage in Fujinuma dam area. Given the increased vulnerability of both damaged and undamaged earth-fill dams in future earthquakes, we need to examine strategies for disaster mitigation and prevention. To date, the people who live downstream from the more than 20000 dams have not paid enough attention to the risk of dam failure. The damage potential could be reduced substantially by proper and regular investigations and maintenance. In the mean time, soft measures must be taken, such as preparing risk maps of vulnerable reservoirs and associated downstream areas is extremely important. Also, to improve preparedness for future major earthquakes, better plans for land-use need to be drawn up and the relocation of those vulnerable in high-risk areas must be considered.
A quantitative risk assessment of waterborne infectious disease in the inundation area of a tropical monsoon region Peer-reviewed

So Kazama, Toshiki Aizawa, Toru Watanabe, Priyantha Ranjan, Luminda Gunawardhana, Ayako Amano

SUSTAINABILITY SCIENCE　7　(1)　45-54　2012/01

DOI： 10.1007/s11625-011-0141-5 　

ISSN： 1862-4065
Possible earthen dam failure mechanisms of Fujinuma reservoir due to the Great East Japan Earthquake of 2011 Peer-reviewed

Keisuke Ono, So Kazama, Seiki Kawagoe, Yoshiyuki Yokoo, Luminda Gunawardhana

Hydrological Research Letters　5　69-72　2011/11
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.3178/hrl.5.69 　

ISSN： 1882-3416

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A gigantic earthquake with a magnitude of 9.0, the maximum ever recorded in Japan, struck the Tohoku region of Japan on 11 March, 2011. As a result, as many as 745 reservoirs in Fukushima prefecture were damaged. The failure of the earth-fill dam at the Fujinuma reservoir in Fukushima prefecture resulted in eight deaths in a village downstream. This was only the second such dam to fail completely in the recorded history of Japan, the first being Mannou Lake dam. The failure was caused by the Ansei Nankai earthquake in 1854. According to official records, of the 210,000 reservoirs in Japan, at least 20,000 dams are vulnerable to future earthquakes. Therefore, it is imperative that the failure mechanism of the Fujinuma reservoir be understood. As such, we developed several theories to explain what happened. Adherence to recommendations made in this report will reduce the potential for damage in future catastrophic events.
Damage from the Great East Japan Earthquake and Tsunami - A quick report Invited Peer-reviewed

Nobuo Mimura, Kazuya Yasuhara, Seiki Kawagoe, Hiromune Yokoki, So Kazama

MITIGATION AND ADAPTATION STRATEGIES FOR GLOBAL CHANGE　16　(7)　803-818　2011/10

DOI： 10.1007/s11027-011-9297-7 　

ISSN： 1381-2386
Impact of Urbanization and Climate Change on Aquifer Thermal Regimes Peer-reviewed

Luminda Niroshana Gunawardhana, So Kazama, Saeki Kawagoe

WATER RESOURCES MANAGEMENT　25　(13)　3247-3276　2011/10

DOI： 10.1007/s11269-011-9854-6 　

ISSN： 0920-4741

eISSN： 1573-1650
Groundwater Temperature as a Proxy to Estimate Ground Surface Warming Attributed to Anthropogenic Impacts in 20th Century in Japan Peer-reviewed

L. N. Gunawardhana, S. Kazama

ASPIRE/IWA　19-3-3　2011/10
The relationship between discharge and nutrient concentration in inundation areas in Cambodia Peer-reviewed

A. Amano, S. Kazama

ASPIRE/IWA　P-18-7　(2)　165-175　2011/10
Publisher: Japan Society on Water Environment
DOI： 10.2965/jwet.2012.165 　

ISSN： 1348-2165

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We analyzed the monthly data of discharge, ammonium, total phosphorus, and potassium in the lower Mekong River to discuss the applicability of the rating curve function to estimate the nutrient concentration and to understand the inundation effects for nutrient expansion. The various sources of nutrient in the upstream directly affected the water quality in the downstream. Although the sedimentation amount depends on the discharge affecting deposition and erosion, ammonium and potassium directly reached the lower Mekong area because there was no correlation between discharge and these water quality parameters. Therefore, we cannot apply the rating curve function for nutrient water quality in the lower Mekong River.
Evaluations of seasonal habitat variations of freshwater fishes, fireflies, and frogs using a habitat suitability index model that includes river water temperature Peer-reviewed

Kei Nukazawa, Jun-ichi Shiraiwa, So Kazama

ECOLOGICAL MODELLING　222　(20-22)　3718-3726　2011/10

DOI： 10.1016/j.ecolmodel.2011.09.005 　

ISSN： 0304-3800

eISSN： 1872-7026
Climate change impacts on groundwater temperature change in the Sendai plain, Japan Peer-reviewed

Luminda Niroshana Gunawardhana, So Kazama

HYDROLOGICAL PROCESSES　25　(17)　2665-2678　2011/08

DOI： 10.1002/hyp.8008 　

ISSN： 1099-1085
Water conflict vulnerability of regions Peer-reviewed

Nilupul Gunasekara, So Kazama

RISK IN WATER RESOURCES MANAGEMENT　347　267-+　2011/06

ISSN： 0144-7815
Benthic communities and genetic structure of caddisfly stenopsyche marmorata along a mountain stream fragmented by slit and unslit sabo dams Peer-reviewed

K. Nukazawa, S. Kazama, K. Watanabe, J. Kang

WIT Transactions on Ecology and the Environment　146　263-274　2011/05
Publisher: WITPress
DOI： 10.2495/RM110231 　

ISSN： 1743-3541
河川水温を考慮したHSIモデルによる水生生物の生息環境評価 Peer-reviewed

糠澤桂, 白岩淳一, 風間聡

水工学論文集　55　1255-1260　2011/03
水理氾濫モデルと現地患者数を用いた水系感染症リスクの時空間分布 Peer-reviewed

天野文子, 佐久間太佑, 風間聡

水工学論文集　55　643-648　2011/03
積雪深データ同化による融雪出水解析 Peer-reviewed

柏俊輔, 朝岡良浩, 風間聡

水工学論文集　55　403-408　2011/03
Monitoring inequalities in irrigation water supplies for sustainable irrigation management Peer-reviewed

Nilupul Gunasekara, So KAZAMA

Annual J. of Hydraulic Engineering　55　115-120　2011/03
Potential Impacts of climate change on the tropical Andes Peer-reviewed

Freddy Soria, So KAZAMA

Annual J. of Hydraulic Engineering　55　79-84　2011/03
Snow and glacier contribution from Ialian Alps for seasonal river discharge in Tagliamento River Peer-reviewed

Luminda Gunawardhana, So KAZAMA

Annual J. of Hydraulic Engineering　55　67-73　2011/03
東南アジア熱帯地域における降雨極値の空間解析 Peer-reviewed

小野桂介, 風間聡

水工学論文集　55　283-288　2011/03
Damages of the earth-filled dams in Fukushima caused by the Tohoku Earthquake

Kazama So, Ono Keisuke, Kawagoe Seiki, Yokoo Yoshiyuki, Ushiyama Motoyuki

Proceeding of Annual Conference　24　70-70　2011
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.24.0.70.0 　

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The Tohoku Earthquake on 11, March, 2011 made an earthquake above level 5.0 on the Japanese scale in Fukushima Prefecture and made a lot of damages for the earth-filled dams. Especially, Fujinuma dam was quickly collapsed and the death toll hits 8. This is a huge damage for the earthquake disaster except tsunami. We carried out field survey on seven earth-filled dams in Fukushima prefecture. All dams had full water level and those dams except Fujinuma had cracks on the top of the embankment. One dam had sand boiling. According to this survey, we estimated three causes for the dam break that one is slope failure caused by the earthquake shake, the other is liquefaction, and the other is slip between different embankment soils. We report the survey and discuss the causes of dam collapsing.
東北地方太平洋沖地震に伴う福島県須賀川市藤沼ダム決壊の概要 Peer-reviewed

小野桂介, 風間聡, 川越清樹, 横尾善之

自然災害科学　30　359-367　2011
Distributed specific sediment yield estimations in Japan attributed to extreme-rainfall-induced slope failures under a changing climate Peer-reviewed

K. Ono, T. Akimoto, L. N. Gunawardhana, S. Kazama, S. Kawagoe

HYDROLOGY AND EARTH SYSTEM SCIENCES　15　(1)　197-207　2011

DOI： 10.5194/hess-15-197-2011 　

ISSN： 1027-5606
Species diversity of benthic faunal communities along a mountain stream fragmented by slit and unslit dam Peer-reviewed

Kei Nukazawa, So Kazama, Kozo Watanabe

Proceedings of the 5th conference of Asia Pasific Association of Hydrology and Water Resources(APHW)　48-55　2010/11
スリット型砂防ダムの存在する渓流河川の底生動物の種多様性と遺伝的多様性 Peer-reviewed

糠澤桂, 風間聡, 渡辺幸三, Ji Hyun Kang

環境工学研究論文集　47　433-440　2010/11
Assessment on the Physical Habitat and Species Diversity of Benthos by Influence of Structure in Mountain Stream Peer-reviewed

Ji Hyun Kang, So Kazama

Proceedings of 8th international symposium on Ecohydraulis 2010　1193-1199　2010/07
Implication of water resources inequality for small scale irrigation scheme management Peer-reviewed

N.K. Gunasekara, S. Kazama

Proceedings of the 5th conference of Asia Pasific Association of Hydrology and Water Resources(APHW)　352-357　2010/07
Estimation of snowfall distribution and development of distributed snowmelt runoff model Peer-reviewed

柏俊輔, 風間聡, 朝岡良浩

River Engineering Proceedings　16　289-294　2010/06
Analysis of the risk distribution of slope failure in Thailand by the use of GIS data Peer-reviewed

K. Ono, S. Kazama, S. Kawagoe

Environmental Hydraulics　2　1189-1194　2010/06
Downscaling output of global climate models with application to aquifer thermal regimes in the Sendai plain Peer-reviewed

L.N. Gunawardhana, S. Kazama

Environmental Hydraulics　1　1157-1162　2010/06
Assessment on physical habitat diversity and species diversity of invertebrate in mountain stream Peer-reviewed

J.H. Kang, S. Kazama

Environmental Hydraulics　2　17-22　2010/06
透過型・不透過型砂防ダムの存在する山地渓流における底生動物群集の種多様性 Peer-reviewed

糠澤桂, 風間聡, 渡辺幸三

水工学論文集　54　1285-1290　2010/03
水理氾濫モデルと現地患者数を用いた水系感染症リスクの定量化 Peer-reviewed

佐久間太佑, 風間聡

水工学論文集　54　457-462　2010/03
Evaluation of the effects of an EL NINO event on glacier melting rate Peer-reviewed

Freddy Soria, So KAZAMA

Annual Journal of Hydraulic Engineering　54　25-30　2010/03
Inequalities in water resources distributions and water related conflicts Peer-reviewed

Nilupul K. Gunasekara, So KAZAMA, Dai Yamazaki, Taikan Oki

Annual Journal of Hydraulic Engineering　54　115-120　2010/03
Different skills of five GCMs abd their impacts on aquifer thermal regimes Peer-reviewed

Luminda Gunawardhana, So KAZAMA

Annual Journal of Hydraulic Engineering　54　67-73　2010/03
Evaluation of climate change effects on discharge generation in a heterogeneous watershed Peer-reviewed

Freddy Soria, So KAZAMA

16th IAHR-APD 2010 Conference Proceedings　2b002/CD-ROM　2010/02
Estimation of the future flood damages in Japan using GCMs and numerical geological data Peer-reviewed

Hirofumi Takiguchi, Ayumu Sato, Seiki Kawagoe, So KAZAMA

16th IAHR-APD 2010 Conference Proceedings　1b003/CD-ROM　17-22　2010/02
Publisher:
Probabilistic modelling of rainfall induced landslide hazard assessment Peer-reviewed

S. Kawagoe, S. Kazama, P. R. Sarukkalige

HYDROLOGY AND EARTH SYSTEM SCIENCES　14　(6)　1047-1061　2010

DOI： 10.5194/hess-14-1047-2010 　

ISSN： 1027-5606
Tidal effects on aquifer thermal regime: An analytical solution for coastal ecosystem management Peer-reviewed

Luminda Niroshana Gunawardhana, So Kazama

JOURNAL OF HYDROLOGY　377　(3-4)　377-390　2009/10

DOI： 10.1016/j.jhydrol.2009.08.035 　

ISSN： 0022-1694
Assessment of snowmelt triggered landslide hazard and risk in Japan Peer-reviewed

Saeki Kawagoe, So Kazama, Priyantha Ranjan Sarukkalige

COLD REGIONS SCIENCE AND TECHNOLOGY　58　(3)　120-129　2009/09

DOI： 10.1016/j.coldregions.2009.05.004 　

ISSN： 0165-232X
数値気候モデルの将来展望値を用いた日本の洪水被害予測 Peer-reviewed

滝口博文, 佐藤歩, 川越清樹, 風間聡

地球環境研究論文集　17　17-22　2009/09
Publisher:
気候変動による湖沼の水温躍層の変化

志田孝之, 風間聡, 山本潤

地球環境研究論文集　17　23-28　2009/09
Publisher:
GISを用いた熱帯モンスーン域の土砂崩壊リスク評価 Peer-reviewed

小野桂介, 川越清樹, 風間聡

地球環境研究論文集　17　39-44　2009/09
Publisher:
温暖化による洪水氾濫とその適応策 Peer-reviewed

風間聡, 佐藤歩, 川越清樹

地球環境　14　(2)　135-142　2009/08
Publisher:
ISSN： 1342-226X
温暖化に対する土砂災害の影響評価 Peer-reviewed

川越清樹, 風間聡

地球環境　14　(2)　143-152　2009/08
Publisher:
ISSN： 1342-226X
スノーボードを利用したキネマティックGPSによる積雪深観測 Peer-reviewed

菊地慶太, 風間聡

水文・水資源学会誌　22　(4)　277-285　2009/07

DOI： 10.3178/jjshwr.22.277 　
DNA多型マーカーによるヒゲナガカワトビケラの流域内移動分散パターンの評価 Peer-reviewed

渡辺幸三, 八重樫咲子, 菊池裕二, 竹門康弘, 風間聡, 大村達夫

水環境学会誌　32　(4)　253-258　2009/07
Publisher: Japan Society on Water Environment
DOI： 10.2965/jswe.32.253 　

ISSN： 0916-8958

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Population connectivity of aquatic organisms is an important factor for sustaining the robustness of metapopulation in a basin-scale as well as for interpreting the properties of respective local populations. We examined the genetic structure of 30 Stenopsyche marmorata (Tricoptera) local populations in 4 catchments in South-Central Miyagi Prefecture, Japan using AFLP markers, and evaluated their dispersal pattern. We constructed a dendrogram using q, and found that 7 populations in headwater were isolated from another area in the basins. Although previous studies on S. marmorata adult flight within streams reported most of the females fly upstream along a watercourse after mating, our results indicated high possibility of non-directional adult dispersal due to wind. The results also suggested a strong potential for DNA polymorphic analysis to enhance understanding of the population connectivity and dispersal patterns of aquatic organisms in a basin scale.
Evaluating the cost of flood damage based on changes in extreme rainfall in Japan Peer-reviewed

So Kazama, Ayumu Sato, Seiki Kawagoe

SUSTAINABILITY SCIENCE　4　(1)　61-69　2009/04

DOI： 10.1007/s11625-008-0064-y 　

ISSN： 1862-4065
The potentially available global water resources distribution under climate change Peer-reviewed

Nilupul K. Gunasekara, So KAZAMA, Dai Yamazaki, Taikan Oki

水工学論文集　53　13-18　2009/03
Spatial downscaling of GCM output for assessing the impacts on groundwater temperature in the Sendai Plain Peer-reviewed

Luminda Gunawardhana, So KAZAMA

水工学論文集　53　79-84　2009/03
GPS観測による山岳域の積雪推定モデルの評価 Peer-reviewed

菊地慶太, 風間聡

水工学論文集　53　409-414　2009/03
数値気候モデルを用いた土砂生産量予測 Peer-reviewed

秋本嗣美, 川越清樹, 風間聡

水工学論文集　53　655-660　2009/03
土砂崩壊リスク評価に対する気候モデルの適用 Peer-reviewed

川越清樹, 風間聡, 肱岡靖明, 高橋潔

水工学論文集　53　661-666　2009/03
気候モデルを利用した日本列島洪水リスク評価 Peer-reviewed

佐藤歩, 川越清樹, 風間聡, 森杉壽芳

水工学論文集　53　847-852　2009/03
Global scale evaluation of coastal fresh groundwater resources Peer-reviewed

Priyantha Ranjan, So Kazama, Masaki Sawamoto, Ahmad Sana

OCEAN & COASTAL MANAGEMENT　52　(3-4)　197-206　2009/03

DOI： 10.1016/j.ocecoaman.2008.09.006 　

ISSN： 0964-5691
Evaluation of flood control and inundation conservation in Cambodia using flood and economic growth models Peer-reviewed

So Kazama, Tatsuhito Kono, Kengo Kakiuchi, Masaki Sawamoto

HYDROLOGICAL PROCESSES　23　(4)　623-632　2009/02

DOI： 10.1002/hyp.7190 　

ISSN： 0885-6087
A use of global climate model output for site-specific assessment of climate change impacts on groundwater temperature

Luminda Gunawardhana, So Kazama

IAHS-AISH Publication　(329)　264-276　2009

ISSN： 0144-7815
SLOPE HAZARD RISK DUE TO RAINFALL CONDITION IN FUTURE Invited Peer-reviewed

Seiki Kawagoe, So Kazama, Masaki Sawamoto

ADVANCES IN WATER RESOURCES AND HYDRAULIC ENGINEERING, VOLS 1-6　1108-1117　2009
SEASONAL CHANGE OF GROUNDWATER FLOW AND ITS EFFECT ON TEMPERATURE DISTRIBUTION IN SENDAI PLAIN Invited Peer-reviewed

Luminda Gunawardhana, Kazama So, Sawamoto Masaki

ADVANCES IN WATER RESOURCES AND HYDRAULIC ENGINEERING, VOLS 1-6　193-+　2009
SENSITIVITY ANALYSIS OF DISTRIBUTED RAINFALL-RUNOFF MODELS Invited Peer-reviewed

Freddy Soria, So Kazama, Masaki Sawamoto

ADVANCES IN WATER RESOURCES AND HYDRAULIC ENGINEERING, VOLS 1-6　24-+　2009
Evaluation of climate change effects on glacier area and vegetation using remote sensing imagery Peer-reviewed

Freddy Soria, So Kazama

Proceedings of 7th International Symposium on Echohydraulics　CD-ROM　(1)　2009/01
Distribution function for estimating habitat suitability index in the Natori River basin Peer-reviewed

So Kazama, Yuki Ogase

Proceedings of 7th International Symposium on Echohydraulics　CD-ROM　(2)　2009/01
Assessment of water conflict in Mae Chaem River Basin, Northern Thailand Peer-reviewed

Chaiwat Ekkawatpanit, So Kazama, Masaki Sawamoto, Priyantha Ranjan

WATER INTERNATIONAL　34　(2)　242-263　2009

DOI： 10.1080/02508060902895892 　

ISSN： 0250-8060
Effect of water quality on Japanese major rivers caused by climate change Peer-reviewed

Seiki Kawagoe, Yu Kikuchi, So KAZAMA, Satoshi Takizawa

Environmental Engineering Research　45　467-474　2008/11
Publisher: Japan Society of Civil Engineers
DOI： 10.11532/proes1992.45.467 　

ISSN： 1341-5115

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This study discusses river water quality with extreme precipitation change. We tried to project the water quality change by climate change such as heavy rainfall and lengthening of no rain period, and analyzed the variation ratio of turbidity loadings such as biochemical oxygen demand and suspended solid in Japanese typical rivers according to return period of extreme precipitation. L-Q rating functions and organic pollutants sedimentation model were applied to evaluate water quality during heavy rainfall and during draught period, resepectively. As results, we are able to point out high risk rivers, which have worse water quality after climate change in Japan. And the following detail results were obtained; 1) In the Ara and the Gouno rivers, turbidity loading increases remarkably with changing rainfall condition.2) The turbidity loading process was clarified by draught period.3) Turbidity loading increases from 200 to 300% in case of a heavy rainfall by climate change in Japan. 4) Turbidity loading increases about 110% in case of longer draught period caused by climate change.
将来気候モデルを用いた土砂崩壊リスク評価 Peer-reviewed

川越清樹, 風間聡, 沢本正樹

地球環境研究論文集　16　27-35　2008/08
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/proge.16.27 　

ISSN： 1884-8419

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Extreme precipitation is forecasted by climate projection model with effect of global warming. The slope hazards are caused by extreme precipitation in the future. It is necessary to evaluate higher dangerous regions by the spatialtemporal distribution for risk mitigation. We made the risk maps of the slope hazard in JAPAN by using climate projection model (MRI-RCM2OVer.2;SRES A2 and MIROC; SERES A 1B) and digital geographic information data. We evaluated slope hazard risks about present, Near-future climate and Future climate. The risk indexes are slope failure probability and economic damage on each land use. As a result, high risk areas are Hokkaido, Toyama pref, Ishikawa pref, Fukui pref and Hyogo pref because over 10billion economic damage extend due to climate change.
Estimating snow distribution over a large area and its application for water resources Peer-reviewed

So Kazama, Hirokazu Izumi, Priyantha Ranjan Sarukkalige, Takayuki Nasu, Masaki Sawamoto

HYDROLOGICAL PROCESSES　22　(13)　2315-2324　2008/06

DOI： 10.1002/hyp.6826 　

ISSN： 0885-6087
A probability model of sediment hazard based on numerical geographical information and extreme precipitation data Peer-reviewed

川越清樹, 風間聡, 沢本正樹

自然災害科学　27　(1)　69-83　2008/05
Publisher:
ISSN： 0286-6021

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A probability model of sediment hazard was made by multiple logistic regression analysis. Relief energy, hydraulic gradient due to extreme precipitation of return period and geological features are used as parameters in this model. The risk has been analyzed quantitatively by giving a probability through setting the cause of the sediment hazard. The evaluation of the probability distribution in Japan has been performed by using those conditions that are expressible by digital geographic information. The probability distribution is composed of the 1 km× 1 km resolutions that can reflect the social risk and global changes. Dangerous areas could be extracted according to the probability of showing quantitative risk. These results are useful for the decision of the areas for the countermeasure plan. In summary, the results are as follows. (1) The urban area that extends a Chugoku mountainous district is at high risk with sediment hazard by extreme precipitation of 10-year return period. (2) The high risk areas have been extracted from the urban areas in Japan by extreme precipitation of 100-year return period, and an enormous economic loss has been predicted. (3) Probability of the resolutions has been verified to reflect information on probability of 50m×50m resolutions.
Hierarchical spatial structure of species diversity of riverine benthic faunal community in south-central Miyagi Prefecture Peer-reviewed

浜本洋, 風間聡, 渡辺幸三, 沢本正樹, 大村達夫

水工学論文集　52　1171-1176　2008/03

DOI： 10.2208/prohe.52.1171 　
Evaluation of reservoir sedimentation by slope failure Peer-reviewed

秋本嗣美, 川越清樹, 風間聡, 沢本正樹

水工学論文集　52　571-576　2008/03

DOI： 10.2208/prohe.52.571 　
Risk evaluation of sediment hazard due to snowmelt in Japan Peer-reviewed

川越清樹, 風間聡, 沢本正樹

水工学論文集　52　468-473　2008/03

DOI： 10.2208/prohe.52.463 　
Evaluation of flood damages by numerical simulation and extreme precipitation data Peer-reviewed

佐藤歩, 川越清樹, 風間聡, 沢本正樹

水工学論文集　52　438-443　2008/03

DOI： 10.2208/prohe.52.433 　
Evaluation of predictive uncertainty in distributed rainfall-runoff models Peer-reviewed

Freddy Soria, So KAZAMA, Masaki Sawamoto

水工学論文集　52　73-78　2008/03

DOI： 10.2208/prohe.52.73 　
Regional analysis of risk for waterborne infectious disease according to flood in Cambodia

SAKUMA Taisuke, KAWAGOE Seiki, KAZAMA So

Proceeding of Annual Conference　21　94-94　2008
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.21.0.94.0 　
Evaluation of sediment hazaerd due to climate change

kawagoe seiki, kazama so

Proceeding of Annual Conference　21　46-46　2008
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.21.0.46.0 　

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Extreme precipitation is forecasted by global warming with GCM (Global circulation model). The water resource crisis and an increase in the disaster are feared with cause as extreme precipitation in the future. It is necessary to evaluate a high dangerous region by the spatial-temporal distribution to risk mitigation. The risk map is useful of counter measures planning. The situation of take a counter measure can be understood from the time change of the risk map. We made the risk maps of the slope hazard in JAPAN by using forecast climate data (RCM20Ver.2: JMA) and digital geographic information data. I evaluated slope hazard risks about 1981-2000(Present climate), 2031-2050(Near-future climate), 2081-2100(Future climate). The risk indexes are slope failure probability.
Social Impact Evaluation of Snow Comparing the 2006 Heavy Snow and the 2007 Little Snow

Sano Katsuhiro, Kikuchi Keita, Kazama Sou

Proceeding of Annual Conference　21　56-56　2008
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.21.0.56.0 　
降雨極値データを利用した気候変動に伴う全国浸水被害評価 Peer-reviewed

佐藤歩, 川越清樹, 風間聡, 沢本正樹

土木学会水工学論文集　52　433-438　2008
Spatial Hierarchichy Structure of Genetic Diversity of Stenopsyche marmorata in three Catchments in Eastern Japan Peer-reviewed

渡辺幸三, 菊池祐二, 風間聡, 大村達夫

水環境学会誌　31　(1)　31-37　2008/01
Publisher: Japan Society on Water Environment
DOI： 10.2965/jswe.31.31 　

ISSN： 0916-8958

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The genetic diversity of Stenopsyche marmorata was investigated in three spatial hierarchies, among catchments, among reaches within catchments, and among individuals within reaches, by AFLP analysis of 306 individuals in 12 reaches in 3 catchments in Eastern Japan. The analysis of molecular variance revealed that the diversity within reaches accounted for the highest percentage (86%) of the total genetic variation in the three hierarchies. The genetic diversity between reaches increased with geographical distance between reaches on a small spatial scale (=2-74km); however, it did not increase on a large spatial scale (=74-450km). The level of gene flow among adjacent catchments (=55-74km) was lower than that between reaches within catchments (=2-19km). The genetic diversity within reaches (as the percentage of polymorphic loci and expected heterozygosity) positively correlated with altitude, suggesting that altitude is an environmental factor in determining the local population size of S. marmorata in each reach.
Habitat estimation by HSI model using geographical information system and hydrological simulation data Peer-reviewed

風間聡, 松本哲, 沢本正樹

土木学会論文集Ｂ　63　(4)　323-337　2007/12/20

DOI： 10.2208/jscejb.63.323 　
Watershed environment evaluation from the viewpoint of biodiversity using HSI Peer-reviewed

風間聡, 松本哲, 沢本正樹, 浜本洋

土木学会論文集Ｂ　63　(4)　338-350　2007/12/20

DOI： 10.2208/jscejb.63.338 　
Characterization of firefly habitat using a geographical information system with hydrological simulation Peer-reviewed

So Kazama, Satoru Matsumoto, S. Priyantha Ranjan, Hiroshi Hamamoto, Masaki Sawamoto

ECOLOGICAL MODELLING　209　(2-4)　392-400　2007/12

DOI： 10.1016/j.ecolmodel.2007.06.029 　

ISSN： 0304-3800
Genetic differentiation simulation based on a individual-based model for aquatic insect populations fragmentad by reservoir Peer-reviewed

Yuji Kikuchi, Kozo Watanabe, So Kazama, Tatuo Omura, Masaki Sawamoto

Environmental engineering research　44　99-106　2007/11
Publisher: Japan Society of Civil Engineers
DOI： 10.11532/proes1992.44.99 　

ISSN： 1341-5115

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We developed a model for stream aquatic insect populations to simulate geneti differentiation between fragments above and below a reservoir. The model includes parameters of population size, dispersal rate, mutation rate, and magnitude of habitat fragmentation caused by reservoir. According to the model, genetic distance (Nei's D_xy) between the fragments increased following dam construction, and finally reached maximum differentiation within 10-50 generations. We simulated genetic differentiation of Stenopsyche marmorata (Trichoptera, Stenopsychidae) populations based on an observed data set of D_xy at 6 dam sites, and evaluated the proportion of individuals unable to migrate across the reservoirs due to the dam constriction. The result indicated migration was largely reduced (i. e., 20-60% individual migrating) in 2 dams and was completely halted where D_xy was highest.
Evaluation of groundwater resources in wide inundation areas of the Mekong River basin Peer-reviewed

So Kazama, Terumichi Hagiwara, Priyantha Ranjan, Masaki Sawamoto

JOURNAL OF HYDROLOGY　340　(3-4)　233-243　2007/07

DOI： 10.1016/j.jhydrol.2007.04.017 　

ISSN： 0022-1694
Numerical modelling of saltwater-freshwater interaction in the Walawe River basin, Sri Lanka Peer-reviewed

Priyantha Ranjan, So Kazama, Masaki Sawamoto

A New Focus on Groundwater-Seawater Interactions, IAHS publication　312　306-314　2007/07
Assessment of Aquifer-Land use composite vulnerability in Walawe River Basin, Sri Lanka Peer-reviewed

Priyantha Ranjan, Ashim Das Gupta, So Kazama, Masaki Sawamoto

Asian Journal of Water, Environment and Pollution　4　(2)　1-10　2007/07
Effect of canalization on inundation and suspended sediment deposition in the Plain of Reeds, Mekong Delta, Vietnam Peer-reviewed

Pham Ngoc, So Kazama, Masaki Sawamoto

Proceedings of 32nd Congress of IAHR　CD-ROM-A1　(b)　2007/07/01
Distributed model parameter estimation in heterogeneous regions: A case study in poorly gauged andean basins Peer-reviewed

Fressy Soria, So Kazama, Masaki Sawamoto

Proceedings of 32nd Congress of IAHR　CD-ROM B1　(a)　2007/07/01
Regional vulnerability of snow water resource in climate change Peer-reviewed

Takayuki Nasu, So Kazama, Masaki Sawamoto

Annual J. of Hydraulic Engineering　51　361-366　2007/03
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.51.361 　

ISSN： 0916-7374

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Snow water equivalent (SWE) distribution in time series was acquired from SWE model with AMeDAS data, remote sensing data, and elevation data. The SWE model was composed of the snowfall model and the snowmelt model. The snowfall distribution was presumed using the weighted average distance method with AMeDAS data in the snowfall model. The snowmelt was estimated using the degree-day method in the snowmelt model. The snowmelt rate factor was decided by comparing the snow map with SWE distribution. To discuss the regional vulnerability of snow water resource, difference between SWEs of the little snow year and the heavy one was estimated. As results, the difference was 1000mm and over in Yamagata, Niigata, Toyama and its surroundings, which were considered as vulnerable region of SWE in Japan.
Risk model of sediment hazard due to snowmelt Peer-reviewed

Seiki Kawagoe, So Kazama, Masaki Sawamoto

Annual J. of Hydraulic Engineering　51　367-372　2007/03
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.51.367 　

ISSN： 0916-7374

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The Probability and the road damage due to sediment hazard caused by snowmelt were analyzed by use of the risk model. The risk model was applied by a multiple logistic regression analysis based on past hazard conditions. We set conditions of geology, relief energy and hydraulic gradient as the necessary variables. Hydraulic gradient was analyzed by infiltration analysis with consideration of snowmelt. Snowmelt conditions were obtained by SWE (Snow Water Equivalent) model. The Probability and the road damage in the Tohoku region are shown in map with 1km² resolutions. This map shows spatial-temporal risk distribution of sediment hazard.
The seawater intrusion control by groundwater recharge facility Peer-reviewed

Masakazu Miyagi, So Kazama, Masaki Sawamoto

Annual J. of Hydraulic Engineering　51　451-456　2007/03
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.51.451 　

ISSN： 0916-7374

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The effect of a detention-infiltration facility to groundwater salinity intrusion is examined by observation and using MODFLOW. MODFLOW is the model for groundwater analysis. MODFLOW was applied in Eastern Sendai area. By observation, it was confirmed that there are salinity intrusion. Utility of detention-infiltration facility was confirmed. Furthermore, when infiltration facility is installed over the seawater wedge, it cannot decrease saltwater effectively. Therefore, it is needed to monitor seawater wedge before installing infiltration facility. The optimum surface area and depth of infiltration facility is less than 0.6 km² and 12m, respectively. Increasing saltwater by land-use change can decrease by installing infiltration facility. The graphs of this result are useful indices to install an infiltration facility.
Analysis of seasonal variation in the patients of waterborne infectious diseases by the hydraulic inundation simulation Peer-reviewed

Toshiki Aizawa, So Kazama, Toru Watanabe, Masaki Sawamoto

Annual J. of Hydraulic Engineering　51　1189-1194　2007/03

DOI： 10.2208/prohe.51.1189 　
Specific sediment yield prediction involving relationship between sediment storage and slope failure probability

kawagoe seiki, kazama so, sawamoto masaki

Proceeding of Annual Conference　20　114-114　2007
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.20.0.114.0 　

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The sediment yield in basin is caused with the phenomenon of sediment storage and worsening water quality. These phenomenons are promoted by the precipitation change by global warming. Therefore, it is necessary to understand the influence of sediment yield for the environment protection of basin. We tried the sediment yield forecast by using slope failure probability model. At first, we verified relationship between sediment storage in dam and slope failure probability. We developed sediment yield forecast model due to slope failure probability by verification relation. And, we make specific sediment yield map intended for the whole Japanese Islands by using this model. The specific sediment yield map by slope failure is a useful result for orogenic zone in Pacific rim.
Snow Depth Measurement using GPS and Comparison with Numerical Simulation

kikuchi keita, kazama so, sawamoto masaki

Proceeding of Annual Conference　20　25-25　2007
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.20.0.25.0 　

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We gauged the depth of snow using high accuracy GPS.We used Kinematic Surveying for the observation which is one of the interferometrical positionings.We changed the observed data into earth standard coordinates, and figured out snow depth using each interpolation method.Each interpolation method is Nearest Neighbor method and interpolation from 2 points.And we compared observed data with simulation values.
Evaluation of sediment hazard considering extreme precipitation, Peer-reviewed

Seiki Kawagoe, So Kazama, Masaki Sawamoto, Priyantha Ranjan

International Conference on Mitigation of The Risk of Natural Hazards, CD-ROM, MRNH17　2007
Influences of catchment characteristics on nitrogen concentration in largely forested streams during the base flow period Peer-reviewed

Baolin Su, So Kazama, Seiichiro Katayama, Masaki Sawamoto

HYDROLOGICAL PROCESSES　20　(20)　4391-4403　2006/12

DOI： 10.1002/hyp.6181 　

ISSN： 0885-6087
The effects of climate change on water resources Invited Peer-reviewed

So Kazama, Taikan Oki

Global Environmental Research　10　(2)　201-206　2006/12
Evaluation of basin auatic biodiversity using HSI model Peer-reviewed

H. Hamamoto, S. Kazama, M. Sawamoto

Environmental Engineering Research　43　559-567　2006/11
Publisher: Japan Society of Civil Engineers
DOI： 10.11532/proes1992.43.559 　

ISSN： 1341-5115

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In the Natori River basin, we evaluated aquatic habitat with HSI model. Dynamic data in the modeling are prepared for distributed runoff model and water and heat balance model. To estimate suitable HSI, statistic data and field data are combined after testing some combinations. The best way is that temperature and the other SIs should be calculated by statistic and field survey data, respectively. Biodiversity is obtained from the combination of HSIs for each speacies. As the results, biodiversity is higher around the foot of mountains and is correlated with distribution of dragonflys. This results say that dragonfly habitat is usefule for understanding of basin environment.
Development of a Distributed Flood Damage Model with Economic Evaluation Peer-reviewed

Soichiro Machida, So Kazama, Masaki Sawamoto

Proc. 3th APHW Conference　ST1-05　(A29)　261　2006/10
Evaluation of Sediment Hazard Considering Precipitation in Seasonal Change Peer-reviewed

Seiki Kawagoe, So Kazama, Masaki Sawamoto

Proc. 3th APHW Conference　ST1-05　(A26)　257　2006/10
Analysis on Rainfall-Runoff Modeling Response by Using Input Data with Variable Resolution Peer-reviewed

Freddy Soria, So Kazama, Masaki Sawamoto

Proc. 3th APHW Conference　ST1-49　(A51)　266　2006/10
Effects of climate change on coastal fresh groundwater resources Peer-reviewed

Priyantha Ranjan, So Kazama, Masaki Sawamoto

GLOBAL ENVIRONMENTAL CHANGE-HUMAN AND POLICY DIMENSIONS　16　(4)　388-399　2006/10

DOI： 10.1016/j.gloenvcha.2006.03.006 　

ISSN： 0959-3780
Effect of Climate Change on Coastal Fresh Groundwater Resources Peer-reviewed

S. Priyantha Ranjan, So Kazama, Masaki Sawamoto

Proc. 3th APHW Conference　ST1-05　(A28)　33　2006/10
Slope hazard probability involving return period of extreme precipitation Peer-reviewed

Seiki Kawagoe, So KAZAMA, Masaki Sawamoto

Proc. 15th congress the APD/IAHR　1　527-534　2006/08/07
Soil erosion evaluation in Mae Cheam River by using GIS and numerical model Peer-reviewed

Chaiwat Ekkawatapanit, So KAZAMA, Masaki Sawamoto, Sanit Wongsa

Proc. 15th congress the APD/IAHR　1　677-684　2006/08/07
Influence of hydraulic characteristics to water quality Peer-reviewed

Pichet Chaiwiwatworakul, So KAZAMA, Masaki Sawamoto

Proc. 15th congress the APD/IAHR　3　1373-1380　2006/08/07
Effects of climate and land use changes on groundwater resources in coastal aquifers Peer-reviewed

S. Priyantha Ranjan, So Kazama, Masaki Sawamoto

JOURNAL OF ENVIRONMENTAL MANAGEMENT　80　(1)　25-35　2006/07

DOI： 10.1016/j.jenvman.2005.08.008 　

ISSN： 0301-4797

eISSN： 1095-8630
温暖化による水資源への影響 Peer-reviewed

風間聡, 沖大幹

地球環境　11　(1)　59-65　2006/07
Publisher:
ISSN： 1342-226X
Influence of the forest for evaluation of snow water equivalent Peer-reviewed

Hirokazu Izumi, So KAZAMA, Masaki Sawamoto

Annual J. of Hydraulic Engineering　50　421-426　2006/03
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.50.421 　

ISSN： 0916-7374

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The effect of forest on snow was evaluated by snow model. The snow model consists of a snowfall and snowmelt models. The amount of snowfall interrupted by the canopy was evaluated using the snowfall model. The heat balance method was used in the snowmelt model. LAI (Leaf Area Index) was used as parameter showing the effect of forest. As results, snow depth calculated by the model was almost corresponding to observed data. Applying this model to evaluate forest effects, dense forest can remain snow longer under the high temperature condition. This says that high LAI forest is useful for prevention of snowmelt retention.
Slope hazard probability involving return period of extreme precipitation Peer-reviewed

Seiki Kawagoe, So KAZAMA, Masaki Sawamoto

Annual J. of Hydraulic Engineering　50　619-624　2006/03

DOI： 10.2208/prohe.50.619 　
The risk fluctuation of waterborne infectious disease on flood scales in the Mekong River Peer-reviewed

Toshiki Aizawa, So KAZAMA, Toru Watanabe, Masaki Sawamoto

Annual J. of Hydraulic Engineering　50　625-630　2006/03
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.50.625 　

ISSN： 0916-7374

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This study simulated coliform bacterium distribution using the hydraulic flood model with three different flood events around Phnom Penh in Cambodia and evaluated the risk fluctuation of waterborne infection disease. The results obtained are as follows; 1. The distributions of coliform bacteria increase depending on the flood scale. 2. The coliform bacteria concentrations increase with lower water levels in closed inundation area, on the other hand, the concentrations decrease on areas affected by flood. 3. Evaluating by per unit area, as the flood scales upsize, the risks of waterborne infections in each province decrease. But the hazardous areas of waterborne infection upsize evaluating by all inundation areas.
Influence of water temparature of river bay climate change Peer-reviewed

Jun-ichi Shiraiwa, So KAZAMA, Masaki Sawamoto

Annual J. of Hydraulic Engineering　50　1063-1068　2006/03

DOI： 10.2208/prohe.50.1063 　
Sediment hazard probabhility of the Tohoku region involving snow melting

Kawagoe seiki, kazama so, Sawamoto masaki

Proceeding of Annual Conference　19　136-136　2006
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.19.0.136.0 　

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The snow melting in heavy snowfall areas is used as a valuable water resource. However, it becomes the cause of the sediment hazard, and serious damage is given to the road and the dam on mountains ground. It is necessary to understand a dangerous sediment hazard area and transition to dangerous condition for counter measure. A quantitative risk map becomes useful for distributed understanding. The evaluation of risk probability is useful for the extraction and the ranking of dangerous area, and use to the social risk calculation. A lot of the sediment hazard risk researches by rainfall. However, the research case with the melting of snow is few. We tried the risk map by the sediment hazard probability model to the snow melting was tried. The sediment hazard probability in the Tohokuregion is shown with heavy snow year, usually snow year,and little snow year.
水理氾濫モデルを用いたメコン河氾濫時の感染症危険度評価 Peer-reviewed

相澤寿樹, 風間聡, 渡部徹, 沢本正樹

環境工学論文集　42　443-450　2005/12
Publisher: Japan Society of Civil Engineers
DOI： 10.11532/proes1992.42.443 　

ISSN： 1341-5115

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Coliform distribution dynamics was simulated using the hydraulic flood model around Phnom Penh in Cambodia. The distribution was evaluated for the impact on human health investigated the relationship between coliform count and infant mortality rate spatially. The results obtained are as follows; The risk of infection is higher in the lower region with long inundation period. And, the risl depend on the relation among water level, inundation period and population.
Estimation of rating-curve parameters for sedimentation using a physical model Peer-reviewed

S Kazama, K Suzuki, M Sawamoto

HYDROLOGICAL PROCESSES　19　(19)　3863-3871　2005/12

DOI： 10.1002/hyp.5986 　

ISSN： 0885-6087
Field investigation of the flood disaster in South-West area of Sri Lanka Peer-reviewed

Toshimitsu Komatsu, Hitoshi Tanaka, Keiichi Toda, Yasuyuki Shimizu, Masaharu Fujita, Kazuo Ishino, So KAZAMA, Mtoyuki Ushiyama, Yoshihiro Katsuhama, Srikantha Herath, Bandara Nawarathna

Journal of Hydroscience and Hydraulic Engineering　23　(2)　43-53　2005/12
Risk assessment of infection in the Mekong flood using the hydraulic inundation simulation

Toshiki Aizawa, S. Kazama, Toru Watanabe, M. Sawamoto

Proceedings 2nd International Symposium on development of water resource management system in the Mekong Watershed　42　69-76　2005/12
Publisher: Japan Society of Civil Engineers
DOI： 10.11532/proes1992.42.443 　

ISSN： 1341-5115

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Coliform distribution dynamics was simulated using the hydraulic flood model around Phnom Penh in Cambodia. The distribution was evaluated for the impact on human health investigated the relationship between coliform count and infant mortality rate spatially. The results obtained are as follows; The risk of infection is higher in the lower region with long inundation period. And, the risl depend on the relation among water level, inundation period and population.
Verification experiment on effect of litter layer on water storage Peer-reviewed

Seiki Kawagoe, So KAZAMA, Masaki Sawamoto

Proceedings of XXXI IAHR Congress　Theme A　447-454　2005/09
Effect of spatial resolution on hydrograph at various scales Peer-reviewed

Hyejin Ku, So KAZAMA, Masaki Sawamoto

Proceedings of XXXI IAHR Congress　Theme A　899-908　2005/09
Influence of local hydraulic characteristic to water quality in a river Peer-reviewed

Pichet Chaiwiwatworakul, So KAZAMA, Masaki Sawamoto

Proceedings of XXXI IAHR Congress　Theme C　2253-2260　2005/09
Assessment of groundwater vulnerability in Walawe River basin, Sri Lanka, Peer-reviewed

Priyantha Ranjan, Ashim Das Gupta, So KAZAMA, Masaki Sawamoto

Proceedings of XXXI IAHR Congress　Theme F　4381-4394　2005/09
Analysis of river temperature based on a hydrological model Peer-reviewed

Jun-ichi Shiraiwa, So KAZAMA, Masaki Sawamoto

Proceedings of XXXI IAHR Congress　Theme F　4636-4644　2005/09
NDVI-蒸発散量線形関係式に関する考察と適用性 Peer-reviewed

風間聡, 沢本正樹, 渡辺浩明

土木学会論文集　796　(796)　1-10　2005/08
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscej.2005.796_1 　

ISSN： 0289-7806

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Relationship between evapotranspiration and NDVI is discussed using the single layer model with physical process in the Natori River basin. A new algorithm is developed to make cloud free images of NDVI in time series. Distributions of albedo, wind speed, and interception are involved in the single layer model, which provides evapotranspiration distribution to compare with NDVI. As the results, the correlation coefficient of evapotranspiration estimated by the single layer model and the liner relationship method is more than 0.9, some regions having low and high NDVI do not have good agreements, and the applicable time period of the linear relationship is more than 1 month. Totally, the liner relationship can make us satisfy the estimation of evapotranspiration distribution.
数値地図情報を用いた河川のポテンシャル健全度の評価 Peer-reviewed

風間聡, 土田恭平, 沢本正樹

土木学会論文集　796　(796)　11-21　2005/08
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscej.2005.796_11 　

ISSN： 0289-7806

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A method of potential river healthiness evaluation has been developed in the Natori River supported by GIS and a distributed hydrological model. We have proposed two indices, water quality index and river discharge index, which involve land use effects and distributed runoff model outputs, respectively. These indices can express well regional river environment. Using two indices, we could obtain more detailed information on river health and compare with other rivers having different precipitation. These indices are highly correlated with population density and forest covered ratio, which are convenient for general use. As the results evaluating other rivers from these indices, we could realize the difference among rivers in views of quality and quantity, and the effect of the river healthiness evaluation proposed.
雪域における融雪期の植生活動と気候因子の解析 Peer-reviewed

朝岡良浩, 風間聡, 沢本正樹

Annual Journal of Hydraulic Engineering　49　313-318　2005/03/15
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.49.313 　

ISSN： 0916-7374

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Effect of snow on vegetation activity in snowmelt season and after disappearance of snow is analyzed using climate data, snow accumulation-snowmelt model and distributed hydrological model. Vegetation activity is evaluated with NDVI (Normalized Difference Vegetation Index) derived from AVHRR/NOAA data. The Snow accumulation-snowmelt model can estimate snow water equivalence and snowmelt. The distributed hydrological model, which consists of 2 layers (snow and surface) and 2 tanks (soil and ground water), can estimate runoff, soil moisture and so forth. It is shown that firstly, vegetation activity decreases if the snow water equivalence is higher than 500 mm, secondly, accumulated snowmelt for 10 days is estimated 15 days before from observed day and vegetation is more active if the snowmelt is higher than 20mm, finally, vegetation is more active if the soil wetness index is higher than 70%.
全日本の積雪水量，積雪深，全層積雪密度分布推定 Peer-reviewed

泉宏和, 風間聡, 戸塚岳大, 沢本正樹

Annual Journal of Hydraulic Engineering　49　301-306　2005/03/15

DOI： 10.2208/prohe.49.301 　
森林が積雪量に及ぼす影響に関する検討 Peer-reviewed

戸塚岳大, 風間聡, 沢本正樹

Annual Journal of Hydraulic Engineering　49　295-300　2005/03/15
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.49.295 　

ISSN： 0916-7374

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Effect of forest on snow is evaluated with a proposed snow model. Wind speed and precipitation intensity and the forest condition (density of the forest and leaf) are acquired with the input data of the snow model. The snow model consists of the snowfall model and snowmelt model. The snowfall process and the amount of the snowcap are evaluated by the snowfall model. The amount of the snowmelt is estimated by the heat balance method in the snowmelt model. These models applied to various conditions (various wind speed, various LAI (Leaf Area Index)), and we can see that low wind speed deposits snow at the front of forest before higher one deposits it at the back of forest.
Effect of Geomorphologic resolution on Hydrograph at different scale Peer-reviewed

Hye Jin Ku, So Kazama, Masaki Sawamoto

Annual Journal of Hydraulic Engineering　49　223-228　2005/03/15
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.49.223 　

ISSN： 0916-7374

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The present study investigates effects of grid size of DEMs on hydrograph applying distributed runoff model to five catchments with different scales. This work is carried out in order to give some information to manipulate spatial data and to acquire the reliable result in applications of grid-based model. The variations of goodness-fit-index and runoff ratio are presented for geomorphologic resolution and catchment scale. It is showed that the fine resolution is appropriate for application to small catchment and the application with different grid sizes mostly meets with satisfactory results.
落葉層の貯留効果に関する基礎的研究 Peer-reviewed

川越清樹, 風間聡, 佐藤栄司, 沢本正樹

Annual Journal of Hydraulic Engineering　49　187-192　2005/03/15
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.49.187 　

ISSN： 0916-7374

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The purpose of this study is to understand effect of different litter layers on water storage. An experimental system with rainfall variation expresses the storage process through measurements of discharge and soil moisture. Also 2D Richards model with hysteresis and the experimental results show the permeability of different litters, broadleaf, acicular, and laurel. The litter layers increases the storage effect as slope angle increases. Broadleaf and laurel have larger storage capacity than acicular. Application of the model with hysteresis is approximated to survey data. In Richards equation with hysteresis, The vertical water permeability of a litter layer is expressed in the half permeable of the soil.
Effect of sea level rise on the loss of fresh groundwater resources : Case study of Western American coast and Bay of Bengal Peer-reviewed

Priyantha Ranjan, So Kazama, Masaki Sawamoto

Journal of Hydraulic Engineering　49　97-102　2005/03/15
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.49.97 　

ISSN： 0916-7374

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Effect of sea level fluctuations on the movement of the freshwater saltwater interface was analyzed by means of a sharp interface model. The simulation was carried out over 100 years period for two case studies based on available data; western coast of America and the Bay of Bengal and adjacent continental shelf. The position of freshwater-saltwater interface was estimated and it reflects the effect of long term average sea level rise on the position of interface. Using the location of the interface, the related loss of freshwater resources was estimated in both areas and results show that volumetric freshwater losses due to sea level rise is 1%- 5% of the aquifer volume in western American coast and 1%-3% in Bay of Bengal. The effects and influences of the loss of fresh groundwater resources were discussed, considering the groundwater use and groundwater recharge and adaptation proposals were introduced for both areas.
2003年スリランカ南西部水害調査報告 Peer-reviewed

小松利光, 田中仁, 戸田圭一, 清水康行, 藤田正治, 石野和男, 風間聡, 牛山素行, 勝濱良博, Srikantha Herath, Bandara Nawarathna

Annual Journal of Hydraulic Engineering　49　433-444　2005/03/01
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.49.433 　

ISSN： 0916-7374

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In the southwest of Sri Lanka, a heavy flood occurred on 17-18 May in 2003, which caused severe river inundations and landslides in a wide area. About 300 persons were killed, and houses, farm products and infrastructures were heavily damaged. In order to investigate this flood and sediment disaster from the hydrological and hydraulic aspects, the committee on Hydroscience and Hydraulic Engineering, Japan Society of Civil Engineers (JSCE) delegated its members whose major are hydrology, hydraulic engineering and river engineering as a flood investigation team by JSCE. In this paper, results of the field investigation are shown for three river basins in Sri Lanka that were severely damaged by flood and landslide disaster induced by the heavy rainfall.
The estimation of water temperature in river used a distributed hydrological model

Shiraiwa Jun-ichi, Kazama So, Sawamoto Masaki

Proceeding of Annual Conference　18　52-52　2005
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.18.0.52.0 　

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It has a close connection to the territory and the native habitat of the living things. We have been interested in the change of river ecosystem by the global warming: especially, the change of water temperature, one of the important indexes related to the river ecosystem. Therefore our purpose is to analyze the water temperature in the Natori River basin. In order to simulate the water temperature in rivers located in a basin, we firstly estimated flow parameters (water depth, flow velocity) from continuous rainfall-runoff simulation with a hydrological model and analyzed heat budget with the flow parameters. According to the observed water temperature data in Mitsuhashi water quality observation point, the average water temperature during a day shows a good agreement.
Estimating the distribution of snow water equivalent, snow depth in Japan

IZUMI Hirokazu, KAZAMA So, SAWAMOTO Masaki

Proceeding of Annual Conference　18　67-67　2005
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.11520/jshwr.18.0.67.0 　

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Daily snow water equivalent, snow depth and snow density distribution were estimated form SWE model with the meteorological data, satellite data and DEM. The SWE model was composed of snowfall model and the snowmelt model. The daily snowfall was estimated using weighted average distance method from AMeDAS data. The daily snowmelt was estimated using the degree-day method in the snowmelt model. The process of snowfall-accumulated was also evaluated in the different regions.
Japanese firefly habitat assessment based on hydrological simulation Peer-reviewed

Matsumoto, Satoru, So Kazama, Masaki Sawamoto

Environmental Hydraulics　919-926　2004/12/15
Analysis on snow distribution and snowmelt factors in the Tohoku disrict using snow simulation model and satellite images Peer-reviewed

Takehiro Totsuka, So Kazama, Yoshihiro Asaoka, Masaki Sawamoto

Journal of JHWR　17　(5)　493-502　2004/10/01

DOI： 10.3178/jjshwr.17.493 　
Flood model application to the Mekong River basin Invited Peer-reviewed

So Kazama, Kuniyoshi Takeuchi

Journal of JSHWR　17　(5)　565-571　2004/10/01

DOI： 10.3178/jjshwr.17.565 　
Asian river engineering problems and researches, - Techinical committee II activities - Peer-reviewed

So Kazama

Proceedings of the 3rd civil engineering conference in the Asian regions　(3)　483-486　2004/08/31
The establishment and verification of spatio-temporal evapotranspiration model using NDVI Peer-reviewed

Hiroaki Watanabe, S. KAZAMA, M. Sawamoto

Annual J. of Hydraulic Engineering　48　145-150　2004/03

DOI： 10.2208/prohe.48.145 　
Evaluation of firefly abitat based on GIS Peer-reviewed

Satoru Matsumoto, S. KAZAMA, M. Sawamoto

Annual J. of Hydraulic Engineering　48　1543-1548　2004/03

DOI： 10.2208/prohe.48.1543 　
The influence of subsurface flow to the riverbank erosion Peer-reviewed

Tadashi Tsunematsu, S. KAZAMA, M. Sawamoto, N. Sentoh

Annual J. of Hydraulic Engineering　48　1093-1098　2004/03

DOI： 10.2208/prohe.48.1093 　
Relation between landuse and allowable population for conservation of river environment Peer-reviewed

Kyohei Tsuchida, S. KAZAMA, M. Sawamoto

Annual J. of Hydraulic Engineering　48　475-483　2004/03

DOI： 10.2208/prohe.48.475 　
Study on sediment movement in the middle Mekong River basin Peer-reviewed

Kenji Suzuki, S. KAZAMA, M. Sawamoto

Annual J. of Hydraulic Engineering　48　1123-1128　2004/03

DOI： 10.2208/prohe.48.1123 　
The regional difference of the benefit with the flood magnitude change Peer-reviewed

Kengo Kakiuchi, S. KAZAMA, M. Sawamoto

Annual J. of Hydraulic Engineering　48　469-474　2004/03

DOI： 10.2208/prohe.48.469 　
Method to delineate blocks in BTOPMC model for large scale watersheds Peer-reviewed

Nawarathna, NMNS. B, S. Kazama, M. Sawamoto, K. Takara

Annual J. of Hydraulic Engineering　48　61-66　2004/03

DOI： 10.2208/prohe.48.61 　
森林が降雪に及ぼす影響評価

戸塚岳大, 朝岡良浩, 風間聡, 沢本正樹

水文・水資源学会研究発表会要旨集　17　108-109　2004
Publisher: 水文・水資源学会
DOI： 10.11520/jshwr.17.0.108.0 　
積雪域における植生活動のモデル化に関する検討

朝岡良浩, 風間聡, 沢本正樹

水文・水資源学会研究発表会要旨集　17　110-111　2004
Publisher: 水文・水資源学会
DOI： 10.11520/jshwr.17.0.110.0 　
カンボジアにおける氾濫域と農業域との関係

垣内健吾, 風間聡, 沢本正樹

水文・水資源学会研究発表会要旨集　17　28-29　2004
Publisher: 水文・水資源学会
DOI： 10.11520/jshwr.17.0.28.0 　
Verification of an NDVI-evapotranspiration model using a single layer model Peer-reviewed

Hiroaki Watanabe, So Kazama, Masaki Sawamoto

GIS and Remote Sensing in Hydrology, Water Resources and Environment　289　(289)　392-400　2004

ISSN： 0144-7815
Integrated evaluation of the Mekong River flood using benefit calculation Peer-reviewed

So KAZAMA, Hisayoshi Morisugi, Masaki Sawamoto

Journal of Hydroscience and Hydraulic Engineering　21　(2)　85-92　2003/11
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.47.367 　

ISSN： 0912-2508

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Flood benefit was calculated for integrated evaluation of the Mekong River flood and inundation in Cambodia. Flood and inundation were simulated using dynamic wave model in main channels and non-uniform flow model for flooded area. Agricultural, industrial and fishery benefits were mainly considered. Data were obtained from field and literature survey. The estimated benefits were about 20 billion-FY for rice production and 10 billion-FY for fish catch in the case of the 2000 flood. On the other hand, the damage to rice production was only about 5 billion-FY. Supposed that upstream countries developed flood control system and could make 50% water level reduction, damage decrease would be less than all benefits decrease. This means that flood and inundation bring much benefit in the Lower Mekong. We would like to propose the development with allowance of flood and damage.
Assessment of daily evapotranspiration using remote sensing data Peer-reviewed

Nourbaeva, Gouldaria, S. KAZAMA, M. Sawamoto

Environmental Infomatics Archives　1　421-427　2003/11
Water Resources Evaluation in the Lower Mekong River Basin Influenced by the Flood Control Peer-reviewed

Terumich Hagiwara, So Kazama, Masaki Sawamoto

Journal of Japan Society of Hydrology & Water Resources　16　(6)　618-630　2003/11
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.3178/jjshwr.16.618 　

ISSN： 0915-1389

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A numerical model is developed for simulating floods and inundation in the Lower Mekong River basin. The model includes the groundwater analysis and shows good results about the temporal and special variation of inundation area around Phnom Penh. The results also show the inundation effects on the groundwater charge. The amount of ground water charge from inundated water was 52km³ in usual flood. We simulate the case of small flood to evaluate the flood control effect on the water resources such as agriculture and groundwater. The simulated results are as follows. (1) Inundated areas are remained despite of flood control. (2) Although the flood control in the upper dams restricts cultivate area in inundation region, larger cultivate area can be gained from water storage. (3) The amount of ground water charge decreases due to flood control, and becomes 30km³ in the case of 44% flood control. However groundwater resource from inundation is sufficient for Cambodian people.
Development of a distributed hydrological model and its application to soil erosion simulation in a forested catchment during storm period Peer-reviewed

BL Su, S Kazama, MJ Lu, M Sawamoto

HYDROLOGICAL PROCESSES　17　(14)　2811-2823　2003/10

DOI： 10.1002/hyp.1435 　

ISSN： 0885-6087
Modelling nitrogen dynamics in an agricultural-forested catchment Peer-reviewed

Baolin Su, So Kazama, MJ Lu, Masaki Sawamoto

WATER RESOURCES SYSTEMS - WATER AVAILABILITY AND GLOBAL CHANGE　2　195-204　2003/07

ISSN： 0144-7815
The influence of snow depth on the variation of vegetation activity and evapotranspiration Peer-reviewed

Y Asaoka, S Kazama, M Sawamoto

WATER RESOURCES SYSTEMS - WATER AVAILABILITY AND GLOBAL CHANGE　280　292-300　2003/07

ISSN： 0144-7815
Integrated Evaluation of the Mekong River Flood Using Bnefit Calculation Peer-reviewed

KAZAMA, S, H. Morisugi, M. Sawamoto

Annual Journal of Hydraulic Engineering　47　(2)　367-372　2003/03
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.47.367 　

ISSN： 0912-2508

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Flood benefit was calculated for integrated evaluation of the Mekong River flood and inundation in Cambodia. Flood and inundation were simulated using dynamic wave model in main channels and non-uniform flow model for flooded area. Agricultural, industrial and fishery benefits were mainly considered. Data were obtained from field and literature survey. The estimated benefits were about 20 billion-FY for rice production and 10 billion-FY for fish catch in the case of the 2000 flood. On the other hand, the damage to rice production was only about 5 billion-FY. Supposed that upstream countries developed flood control system and could make 50% water level reduction, damage decrease would be less than all benefits decrease. This means that flood and inundation bring much benefit in the Lower Mekong. We would like to propose the development with allowance of flood and damage.
The Verification of Hysteresis Effect in Unsaturated Infiltlation Analysis, -Application to 2D Infiltlation Flow- Peer-reviewed

Takahashi, M, S. KAZAMA, E. Sato, M. Sawamoto

Annual J. of Hydraulic Engineering　47　265-270　2003/03
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.47.265 　

ISSN： 0916-7374

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Hysteresis effect is one of the soil characteristics, and it is important for groundwater analysis involving dynamic water movement. In this study, a 2D model based on Richards equation expressed on unsaturated infiltration theory with considered hysteresis effect, was developed. To discuss the model, numerical analysis and experiments were carried out on three conditions in the view of discharge and water balance. As the analysis using the soil parameters measured by experiments, this model is more effective to simulate real water movement than the model without hysteresis effect. As these results, this model is useful to analyze 2D soil water movement and apply to 3D model.
Potential Water Resources Estimation in the Middle of Mekong River Region Considering Irrigation and Reservoirs Peer-reviewed

KAZAMA, S, NMNS Bandara Nawarathna, M. Sawamoto

Annual J. of Hydraulic Engineering　47　187-192　2003/03

DOI： 10.2208/prohe.47.187 　
The Influence of Snow Condition on Seasonal Variation of Basin Vegetation, -A Case Study in the Taki Dam Basin of the Agano River Peer-reviewed

Asaoka, Y, S. KAZAMA, M. Sawamoto

Annual J. of Hydraulic Engineering　47　163-168　2003/03
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.47.163 　

ISSN： 0916-7374

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The influences of snow condition on the seasonal variation of vegetation are investigated in little snow year (1998), normal snow year (1999) and heavy snow year (2000) in the Taki Dam basin of the Agano River. At first, the relationships among NDVI, WI, evapotranspiration and snow covered area are evaluated. The area of snow cover is proportional to mean basin NDVI in snowmelt season. Evapotranspiration in April is 36mm/month in little snow year and 15mm/month in heavy snow year. Secondly, the distribution of vegetation growth ratio to temperature is calculated with a proposed new index. As the results, vegetation growth ratio is faster in the low elevation area (0-1300m), slower in the middle elevation area (1300-1700m) and faster in high elevation area (over 1700m), as temperature increase, respectively. This is related to snow condition and vegetation kinds.
Study on stream water quality in the Kamafusa Lake catchment considering vegetation cover Peer-reviewed

Baolin Su, So Kazama, S Katayama, Masaki Sawamoto

ADVANCES IN HYDRAULICS AND WATER ENGINEERING, VOLS 1 AND 2, PROCEEDINGS　2　973-978　2002/08
Relationship Between Inundation Area and Irrigation Area on Flood Control in the Lower Mekong Peer-reviewed

Hagiwara, T, S. KAZAMA, M. Sawamoto

Proc. 13th congress the APD/IAHR　(1)　596-601　2002/08
Spatial and Temporal Analysis on Evapotranspiration with Landuse Peer-reviewed

Watanabe, H, S. KAZAMA, T. Tada, M. Sawamoto, S. Okazaki

Advances in River Engineering　8　419-424　2002/06
Water Resources Evaluation in the Natori River Basin, Advances in River Peer-reviewed

Tsuchida, K, S. KAZAMA, S. Okazaki, M. Sawamoto

Advance River Engineering　8　545-550　2002/06
The Variation Characteristics of Snow Water Resources in a Wide Area and its Geographical and Climatic Dependency Peer-reviewed

Yoshihiro ASAOKA, So KAZAMA, Masaki SAWAMOTO

Journal of Japan Society of Hydrology & Water Resources　15　(3)　279-289　2002/05
Publisher:
DOI： 10.3178/jjshwr.15.279 　

ISSN： 0915-1389
Modeling the spatial and temporal temperature variation on ground surface using remote sensing data Peer-reviewed

Gouldaria NOURBAEVA, So KAZAMA, Masaki SAWAMOTO

Annual Journal of Hydraulic Engineering, JSCE　46　49-54　2002/03

DOI： 10.2208/prohe.46.49 　
Nutrient runoff in the Kamafusa catchment Peer-reviewed

Seiichiro KATAYAMA, So KAZAMA, Baolin SU, Masaki SAWAMOTO

Annual Journal of Hydraulic Engineering, JSCE　46　223-228　2002/03

DOI： 10.2208/prohe.46.223 　
Evaluation of reservoir and irrigation effect on river runoff simulation in the Mekong River basin Peer-reviewed

NMNS Bandara, NAWARATHNA, So KAZAMA, Masaki SAWAMOTO

Annual Journal of Hydraulic Engineering, JSCE　46　289-294　2002/03

DOI： 10.2208/prohe.46.289 　
Vegetation cover change and correlation with suspended solids concentration of stream water in small-scale forested catchment Peer-reviewed

Baolin SU, So KAZAMA, Masaki SAWAMOTO

Annual Jouranl of Hydralic Engineering, JSCE　46　301-306　2002/03

DOI： 10.2208/prohe.46.301 　
Improvement of calibration procedure of the block wise TOPMODEL with Muskingum-Cunge routing method using sub basins simulated results: Application to part of the lower Mekong River basin Peer-reviewed

NB Nawarathna, So Kazama, Masaki Sawamoto

ADVANCES IN HYDRAULICS AND WATER ENGINEERING, VOLS 1 AND 2, PROCEEDINGS　(1)　540-545　2002/03
土地利用を考慮した蒸発散解析

渡辺浩明, 風間聡, 澤本正樹

水文・水資源学会研究発表会要旨集　15　74-75　2002
Publisher: 水文・水資源学会
DOI： 10.11520/jshwr.15.0.74.0 　
メコン川下流域における洪水制御と潅漑域との関係

萩原照通, 風間聡, 沢本正樹

水文・水資源学会研究発表会要旨集　15　28-29　2002
Publisher: 水文・水資源学会
DOI： 10.11520/jshwr.15.0.28.0 　
名取川水系の積雪, 蒸発散を考慮した水資源解析

土田恭平, 風間聡, 沢本正樹

水文・水資源学会研究発表会要旨集　15　26-27　2002
Publisher: 水文・水資源学会
DOI： 10.11520/jshwr.15.0.26.0 　
Relationship between inundation area and irrigation area on flood control in the Lower Mekong Peer-reviewed

T Hagiwara, S Kazama, M Sawamoto

ADVANCES IN HYDRAULICS AND WATER ENGINEERING, VOLS 1 AND 2, PROCEEDINGS　590-595　2002
Study on the 2000 flood in the lower Mekong by field survey and numerical smulation Peer-reviewed

S Kazama, Y Muto, K Nakatsuji, K Inoue

ADVANCES IN HYDRAULICS AND WATER ENGINEERING, VOLS 1 AND 2, PROCEEDINGS　(1)　534-539　2002
Study on Non-Point Source Pollution in the Kamafusa Catchment, Japan Peer-reviewed

Su Baolin, So Kazama, Masaki Sawamoto

Biosystem　4　(1)　15-28　2001/12
Reservoir release policy for large irrigation system Peer-reviewed

GB Sahoo, R Loof, SL Abernethy, S Kazama

JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING-ASCE　127　(5)　302-310　2001/09

DOI： 10.1061/(ASCE)0733-9437(2001)127:5(302) 　

ISSN： 0733-9437
Runoff simulation and its impact on water quality in the Kamafusa Lake catchment Peer-reviewed

B Su, M Lu, S Kazama, M Sawamoto

DEVELOPMENT, PLANNING AND MANAGEMENT OF SURFACE AND GROUND WATER RESOURCES, THEME A, PROCEEDINGS　292-299　2001/09
Base-flow analysis on hydraulic conductivity using numerical experiments Peer-reviewed

Y Yokoo, S Kazama, M Sawamoto

DEVELOPMENT, PLANNING AND MANAGEMENT OF SURFACE AND GROUND WATER RESOURCES, THEME A, PROCEEDINGS　177-183　2001/09
Influence of human activities on the BTOPMC model runoff simulations in large-scale watersheds Peer-reviewed

NB Nawarathna, T Ao, S Kazama, M Sawamoto, K Takeuchi

DEVELOPMENT, PLANNING AND MANAGEMENT OF SURFACE AND GROUND WATER RESOURCES, THEME A, PROCEEDINGS　93-99　2001/09
A basic research on altitude distribution of snow depth in wide area Peer-reviewed

Y Asaoka, S Kazama, M Sawamoto

DEVELOPMENT, PLANNING AND MANAGEMENT OF SURFACE AND GROUND WATER RESOURCES, THEME A, PROCEEDINGS　48-53　2001/09
Simple analysis on future water resource in the Mekong Basin Peer-reviewed

So Kazama, M Sawamoto, NB Nawarathna

DEVELOPMENT, PLANNING AND MANAGEMENT OF SURFACE AND GROUND WATER RESOURCES, THEME A, PROCEEDINGS　13-19　2001/09
Regionalization of lumped water balance model parameters based on multiple regression Peer-reviewed

Y Yokoo, S Kazama, M Sawamoto, H Nishimura

JOURNAL OF HYDROLOGY　246　(1-4)　209-222　2001/06

DOI： 10.1016/S0022-1694(01)00372-9 　

ISSN： 0022-1694
An Analysis on Heat Environment around the Ariake-kai Bay using NOAA/AVHRR data Peer-reviewed

Daisuke Fukushi, So Kazama, Masaki Sawamoto

Jour. of Hydraulic, Coastal and Environmental Engineering, JSCE　677　(677/II-55)　163-174　2001/05
Publisher:
DOI： 10.2208/jscej.2001.677_163 　

ISSN： 0289-7806
Basic Study on the Evaluation of Water Resources in the Mekong River Basin Peer-reviewed

So Kazama, Masaki Sawamoto, NMNS Bandara Nawarathna

Annual Journal of Hydraulic Engineering, JSCE　45　19-24　2001/03
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.45.19 　

ISSN： 0916-7374

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Water resources in the lower Mekong river basin as an international river, was evaluated using a conceptual analysis method based on water balance. GIS prepareddata sets of elevation, land use and slope data to understand the ratio of.land use in the area. A conceptual area was introduced for easy understanding. It wascovered with only three categories, which are forest, urban and cultivated regions. Water balance equation involving rainfall, evapotranspiration, infiltration, storage and runoff was calculated for water demand for people. As the results, the number of drought months will increase as cultivated area will increase. Especially, serious seasons are dry season and the rice-planting season. It was alsounderstood that population in the area would be limited by water supply for people. Japanese climate condition was also used to compare with the Mekong region. Although this model is simple, the obtained results show us the possibility of the future problems.
Numerical Experiment on the Relationship between Soil Permiability and Long-Term Behavior of Base Flow Peer-reviewed

Yoshiyuki Yokoo, So Kazama, Masaki Sawamoto

Annual Journal of Hydraulic Engineering, JSCE　45　331-336　2001/03
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.45.331 　

ISSN： 0916-7374

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Numerical experiments were carried out to investigate the relationship between the reduction curves of base-flow and the permeability of soil layer at hill-sloped forest. Variable parameters of the experiments were only saturated hydraulic conductivities in the direction of the hill slope and the normal direction. In the results, the peaks of the base-flow were controlled by the magnitude of hydraulic conductivities in the both directions and arrival times in the peak base-flow were governed by the magnitude of hydraulic conductivity in the normal direction to the soil surface. The results also showed that the shapes of the base-flow recession curves could be controlled by the magnitude of hydraulic conductivities in the direction of hill-slope.
Characteristics on an Oxygen Supply System for Bottom Layer Aeration by using Oscillation Water Column Peer-reviewed

Tomohiro Yamashiro, Masaki Sawamoto, Eiji Sato, So Kazama

Annual Journal of Hydraulic Engineering, JSCE　45　1219-1224　2001/03
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.45.1219 　

ISSN： 0916-7374

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This paper proposes an oxygen supply system for bottom layer aeration by wave, which has attracted our interest as clean energy.It is an application of a principle of the oscillating water column, due to wave motion.This instrument has some interesting characteristics.Our previous study showed the condition of maximum flow rate in various wave conditions and pipe sizes.It is also revealed that in some condition, center velocity of the pipe becomes upward flow, and in case of resonance, the fluid in pipe oscillates with high amplitude. Further research by the experiment of this paper showed that upward flow is canceled vanished when a cylinder is installed in pipe, and that in resonance condition, the flow rate in pipe decreases.The maximum flow rate and vertical velocity can be determined by wave magnitude and pipe size
Sea surface temperature and net heat flux variation in the Gulf of Thailand using buoy, meteorological and remote sensing data Peer-reviewed

RK Gautam, S Vongvisessomjai

COASTAL ENGINEERING JOURNAL　42　(4)　341-356　2000/12

DOI： 10.1016/S0578-5634(00)00017-1 　

ISSN： 0578-5634
Study on construction of lumped model without runoff data Peer-reviewed

So Kazama, Tuan Le Trung, Yoshiyuki Yokoo, Masaki Sawamoto

Proc. 12th congress the APD/IAHR　(3)　879-888　2000/11
Runoff Analysis using numerical experiments with saturated and unsaturated layers Peer-reviewed

Yokoo, Yoshiyuki, So Kazama, Masaki Sawamoto

Proc. 12th congress the APD/IAHR　(3)　827-836　2000/11
Temporal and Spacial Analysis of Snow Coverred Area Peer-reviewed

Yoshihiro ASAOKA, So KAZAMA, Masaki SAWAMOTO

Proc. of 4th Int. Conf. on Hydro-Science and -Engineering(CD-ROM)　4　2000/09
GIS Data Based Estimation of Tank Model Coefficients Peer-reviewed

Yoshiyuki YOKOO, So KAZAMA, Hitoshi NISHIMURA, Masaki SAWAMOTO

Journal of Japan Society of Hydrology and Water Resources　12　(6)　481-491　1999/11
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.3178/jjshwr.12.481 　

ISSN： 0915-1389

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Tank model coefficients were optimized at 12 basins. The "Basin Characteristics", which was concerned with gradient, soil, geology and land use, were derived using GIS data for each basin. The relationship was investigated between the model coefficients and the "Basin Characteristics" using Multiple Regression Analysis. As a result, it was realized that each coefficient could be optimized with a one-dimensional equation that consists of several basin characteristics. According to the results of trial application at 2 basins, it became obvious that this method is useful in constructing a tank model for long term runoff.
Estimation of Evapotranspiration in Tropic Region Using Satellite Data Peer-reviewed

S.Kazama, G.B.Sahoo, P.Sriviha

Proceedings of Civil and Environmental Engineering　1　(1)　61-68　1999/11
Analysis of the relationship between water balance and basin characteristics Peer-reviewed

NMNS Bandara Nawarathna, So Kazama

Water Resources Journal, ESCAP/UN　202　(202)　24-38　1999/09
Usage of climate indices for water resources evaluation Peer-reviewed

So Kazama

Proc. of Int. Conf. on Water Resources Management in Intermountane Basins　317-323　1999/02
Evaluation of Tank model coefficients using GIS data Peer-reviewed

Yoshiyuki Yokoo, So Kazama

Proc. 11th congress the APD/IAHR　(1)　293-302　1998/09
Development of simple snow density model for wide area Peer-reviewed

So Kazama

WATER RESOURCES ENGINEERING 98, VOLS 1 AND 2　2　1230-1235　1998/08
GIS data based optimization of tank model Peer-reviewed

Yoshiyuki Yokoo, So Kazama

WATER RESOURCES ENGINEERING 98, VOLS 1 AND 2　2　1026-1031　1998/08
Estimation of Tank model parameters by GIS data Peer-reviewed

Yoshiyuki Yokoo, So Kazama

Annual Journal of Hydraulic Engineering　42　109-114　1998/04

DOI： 10.2208/prohe.42.109 　
Measurement of two dimensional velovity profile using a high-speed color video camera Peer-reviewed

Shigeo Akiyama, Satoshi Noboru, So Kazama, Hitoshi Nishimura

Annual Journal of Hydraulic Engineering　41　1079-1084　1997/03

DOI： 10.2208/prohe.41.1079 　
A Case Study of May 13th(1996) Tornado over Bangladesh Using GMS Data Peer-reviewed

CHOWDHURY, Md. Aminul Karim, Hiroyoshi SHI-IGAI, So KAZAMA

Annual Journal of Hydraulic Engineering1　41　959-964　1997/03

DOI： 10.2208/prohe.41.959 　
Study on the estimation of snowpack density in wide area Peer-reviewed

So Kazama

Annual Journal of Hydraulic Engineering　41　245-250　1997/03

DOI： 10.2208/prohe.41.245 　
Density change of ground snow in Hakkoda Peer-reviewed

M Sasaki, N Shuto, M Sawamoto, M Nagao, S Kazama

SNOW ENGINEERING: RECENT ADVANCES　609-612　1997
Water balance in a heavy snow region Peer-reviewed

S Kazama, M Sawamoto

SNOW ENGINEERING: RECENT ADVANCES　543-548　1997
Estimation of the evapotranspiration distribution in Japan using NDVI Peer-reviewed

S Kazama, S Teramachi

PROCEEDINGS OF THE SEVENTH INTERNATIONAL CONFERENCE ON COMPUTING IN CIVIL AND BUILDING ENGINEERING, VOLS 1-4　3　1741-1746　1997
Assessment of Heat Environment in Tokyo Bay by a Heat Balance Model Peer-reviewed

Shin-ichi Nakanowatari, So Kazama, Masaki Sawamoto

Proceedings of Coastal Engineering, JSCE　43　1131-1135　1996/11
Publisher:
DOI： 10.2208/proce1989.43.1131 　

ISSN： 0916-7897
The Kyucho in the Suruga Bay Peer-reviewed

Shoichiro Kojima, So Kazama, Masaki Sawamoto

Proceedings of Coastal Engineering, JSCE　43　416-420　1996/11
Publisher:
DOI： 10.2208/proce1989.43.416 　

ISSN： 0916-7897
Estimation of Evapotranspiration Distribution in Tohoku Region Peer-reviewed

Tsuyoshi Tada, So Kazama, Masaki Sawamoto

Proc. Int. Conf. on Water Resources & Env. Res. toward 21C　(I)　627-634　1996/11
Estimation of the Snow Depth Distribution and Snow Water Resources Peer-reviewed

So Kazama, Masaki Sawamoto

Proc. Int. Conf. on Water Resource & Env. Res. toward 21C　(I)　659-666　1996/10
Observation of the eddy structures by the satellite Peer-reviewed

Shoichiro Kojima, Masaki Sawamoto, So Kazama

Proc. of the 4th Asian Symposium on Visualization, IAP　451-458　1996/05
Analysis of Yearly Water Balance in the Tohoku district using satellite data Peer-reviewed

So Kazama, Tsuyoshi Tada, Masaki Sawamoto

Annual Journal of Hydraulic Engineering, JSCE　40　81-86　1996/02

DOI： 10.2208/prohe.40.81 　
The Quantification of Vegetation Loss for Human Activity Peer-reviewed

So Kazama, Masaki Sawamoto

Annual Journal of Hydraulic Engineering, JSCE　40　1109-1112　1996/02
研究について思うこと

多田毅, 風間聡

水文・水資源学会誌　9　(1)　21-22　1996/01/05
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.3178/jjshwr.9.21 　

ISSN： 0915-1389
Simple Estimation of Evapotranspiration in Urban Area Partly Coverd with Vegetation Peer-reviewed

Tsuyoshi Tada, So Kazama, Masaki Sawamoto

Journal of Japan Society of Hydrology & Water Resources　9　(1)　23-30　1996
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.3178/jjshwr.9.23 　

ISSN： 0915-1389

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A simple method to estimate evapotranspiration in urban area covered with vegetation is developed. At first, charactaristics of evaporation on unosmotic surface (concrete and asphalt) are examined through wind-tunnel experiments. Using result of the experiments and climatic data of Sendai City, evapotranspiration on unosmotic surface in the city is estimated. Secondly a hydrological index "Forest Equivalent Area Rate" is defined. Basing on satellite data, urban area is classified into forest equivalent area or not. Lastly urban area evapotranspiration is calculated from climatic and unosmotic method, respectively. Evapotranspilation on urban area in the Tohoku district is estimated by using NOAA-AVHRR, AMeDAS, and GIS data.
Synthesis of Snow Area Distribution and Analysis of Snow Area Variation in the Tohoku District Based on N-LAND Database System Peer-reviewed

So Kazama, Hiroshi Kawamura, Shigeru Matsuzawa, Hitoshi Oikawa, Masaki Sawamoto

Journal of The Remote Sensing Society of Japan　16　(3)　56-64　1996
Publisher: The Remote Sensing Society of Japan
DOI： 10.11440/rssj1981.16.258 　

ISSN： 0289-7911

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Using N-LAND database system, the snow cover area in the Tohoku district in Japan is detected monthly in 1991. The N-LAND data system includes all the information of AVHRR/NOAA date and software to detect cloud area. The cloud cover area detection is based on the threshold method using all the AVHHR channel informations. Monthly free cloud covered image is created through synthesizing some images on near time. The detected snow area on the images are validated by the AMeDAS snow-depth data and the error is estimated to be less than 8%. The change of the snow cover area and distributions from Feburary to April, 1991 are investigated in the Tohoku district.
Estimation of the Snow Depth Distribution and Water Resources Volume using NOAA/AVHRR Peer-reviewed

So Kazama, Masaki Sawamoto

JOURNAL OF JAPAN SOCIETY OF HYDROLOGY & WATER RESOURCES　8　(5)　71-79　1995
Publisher: THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES
DOI： 10.3178/jjshwr.8.477 　

ISSN： 0915-1389

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The information on the distribution of snow depth in wide area has been requested for long time. In this study, a method is tried for its estimation by using satellite data, TIDAS and N-LAND database compiled from NOAA/AVHRR. Firstly, snow area on a satellite image is detected by using multi-spectral channel. Secondly, in order to make a cloud free image, cloud covered area is replaced by data from adjacent days images. Thirdly, the distribution of snow depth is estimated from the relationship between elevations and snow depths. This relationship equation is obtained from AMeDAS data and GIS data and applied on snow area. Snow depth distribution maps are obtained in Tohoku district from 1989 to 1991. From those maps, the water resources volume of snow is evaluated.
An Observation of Warm Water Mass of the Kuroshio Flowing into Enshu-Nada and Kumano-Nada Peer-reviewed

Shoichiro Kojima, So Kazama, Masaki Sawamoto

Proceedings of Coastal Engineering, JSCE　42　421-425　1995

DOI： 10.2208/proce1989.42.421 　
Estimation of evapotranspiration using NDVI in a decidous tree area Peer-reviewed

Tsuyoshi Tada, So Kazama, Masaki Sawamoto

JOURNAL OF JAPAN SOCIETY OF HYDROLOGY & WATER RESOURCES　7　(2)　114-119　1994/03
NPP assessment in the Eastan Japan by using digital national land information and the time integral NDVI Peer-reviewed

Ken Mino, So Kazama, Masaki Sawamoto

水工学論文集　38　771-776　1994/02
Estimation of spatial distribution of evapotranspiration in Korea Peer-reviewed

Shachul Shin, Tsuyoshi Tada, So Kazama, Masaki Sawamoto

水工学論文集　38　161-166　1994/02
Estimation of evapotranspiration distribution by using NDVI Peer-reviewed

Tsuyoshi Tada, So Kazama, Masaki Sawamoto

水工学論文集　38　155-160　1994/02
On water balance in a basin with heavy snow area - Case study in the Takidamu basin, the Tadami river - Peer-reviewed

So Kazama, Masaki Sawamoto

水工学論文集　38　113-118　1994/02
Estimation of snow volume in Tohoku district by using satellite data Peer-reviewed

So Kazama, Masaki Sawamoto

水工学論文集　38　107-112　1994/02
THE OBSERVATION FOR REGIONAL ENVIRONMENT BY USING NOAA SATELLITE

KAZAMA So, SAWAMOTO Masaki, TADA Tsuyoshi

Proceedings of the Symposium on Global Environment　2　213-218　1994
Publisher: Japan Society of Civil Engineers
DOI： 10.11532/proge1993.2.213 　

ISSN： 1884-8400

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The satellite data is very useful for observation of the regional environment. However, it has been rather difficult to obtain quantitative data from satellite image data. Recently the number of ground observing stations has been increasing. The interpretation of the image data became easier and clearer. This report shows some examples how to utilize the NOAA data for observation of environment. i.e., the observation of snow covered area, estimation of evapotranspiration and evaluation of NPP are shown as examples. Snow covered area can be obtained correctly by comparing multi-spectal senser. Snow map made from some images makes possible to evaluate snow storage. Evapotranspiration can be estimated by considering the correlation with NDVI which is calculated from the satellite data. The distribution of NDVI also makes possible to evaluate Net Primary Production.
On the estimation of snow volume in Tohoku district Peer-reviewed

So Kazama, Masaki Sawamoto

水工学論文集　37　153-158　1993

DOI： 10.2208/prohe.37.153 　
An application of the time integral NDVI for environmental assessment Peer-reviewed

Ken Mino, So Kazama, Masaki Sawamoto

Environmental Systems Research　21　40-45　1993
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/proer1988.21.40 　

ISSN： 0915-0390

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Recently the problems for ecological environment has become serious. Especially, monitoring of quantity and distribution of vegetation is important. Satellite remote sensing data is useful in this field. Analysing satellite data, influence by meteorological condition and human activity on ecological environment can be assessed. In this study, the Normalized Difference Vegetation Index (NDVI) derived from NOAA AVHRR data is used for monitoring vegetation. The time integral of NDVI (iNDVI) is also calculated to estimate of vegetation, i.e. the amount of CO₂ with photosynthesis, and water resources storage. Firstly, the difference of reflectance between vegetation and sand are confirmed. Secondly annual variation and range of NDVI evaluated for four kinds of land use category; urban area, paddy area, forest and coastal zone. Lastly, the characteristics of iNDVI were studied for each land use categories. From these results, applicability of NDVI and iNDVI to environmental assessment is discussed.
SNOW AREA DETECTION BY USING AVHRR NOAA Peer-reviewed

S KAZAMA, M SAWAMOTO, H KAWAMURA

IGARSS'93: BETTER UNDERSTANDING OF EARTH ENVIRONMENT, VOLS I-IV　4　1830-1832　1993
Study on the snow area detection using AVHRR/NOAA - Case study for the tohoku area on 15 feburary, 1989 - Peer-reviewed

H. Kawamura, S. Kazama, Y. Edamatsu, M. Sawamoto

Journal of The Remote Sensing Society of Japan　12　(#N1)　31-41　1992/03

DOI： 10.11440/rssj1981.12.31 　
Snowdepth model during smowmelt in the Taki basin Peer-reviewed

S.Kazama, M.Sawamoto, J.Kittipong

水工学論文集　36　611-616　1992/02

DOI： 10.2208/prohe.36.611 　
Quasi-Physically-Based Distributed Rainfall-Runoff Model Incorporating GIS Data - Model Structure Development Peer-reviewed

Kittipong Jirayoot, Masaki Sawamoto, So Kazama

Annual Journal of Hydraulic Engineering　36　659-664　1992/02

DOI： 10.2208/prohe.36.659 　
Time variations of the snow area detection using AVHRR/NOAA Peer-reviewed

S. Kazama, H. Kawamura, Y. Edamatsu, M. Sawamoto

Journal of The Remote Sensing Society of Japan　12　(#N4)　59-69　1992
Publisher: The Remote Sensing Society of Japan
DOI： 10.11440/rssj1981.12.427 　

ISSN： 0289-7911

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Applicability of a scheme developed by the authors for snow covered area detection based on satellite data is studied with a series of AVHRR/ NOAA data in snowmelt season. N-LAND database and Ground Truth Data produced from AMeDAS data are combined in the region of the Echigo Mountains, 16, 000 km². Variation of a set of detection parameters in the scheme in confirmed on two deimentional plot of ALBEDO chl, infrared ch3 or thermal infra-red ch4 of six scenes from Junuary to April in 1989. High and low clouds can also be detected by using ch4 and ch3 infra-red, respectively. The results show the threshold values increase as the solar altitude becomes high with season. Snow covered area, free-snow and cloud can be detected precisely by the scheme.
Evaluation of Snow Covered Area by using NOAA-AVHRR Data and Snowmelt Runoff Analysis in the Okutadami Basin Peer-reviewed

Masaki Sawamoto, Kittipong Jirayoot, So Kazama

Journal of Hydroscience and Hydraulic Engineering　10　(2)　1-11　1992
The Application of Snowcover Area Evaluation from Remote Sensing Data to Snowmelt Runoff Tank Analysis Peer-reviewed

Kittipong Jirayoot, So Kazama, Masaki Sawamoto

Annual Journal of Hydraulic Engineering　35　57-62　1991/02

DOI： 10.2208/prohe.35.57 　
Evaluation of the remaining snow area by NOAA-AVHRR and snowmelt runoff Peer-reviewed

S. Kazama, M. Sawamoto, K. Jirayoot

JOURNAL OF JAPAN SOCIETY OF HYDROLOGY & WATER RESOURCES　4　(1)　33-37　1991

Show all ︎Show first 5

Misc. 63

日本全域河道位数データと河道マスクデータの整備—Datasets of Strahler Stream Order and Flood Plain Masks in Japan

山本道, 多田毅, 風間聡

水文・水資源学会誌 = Journal of Japan Society of Hydrology & Water Resources / 水文・水資源学会編集出版委員会編　36　(4)　297-305　2023/11
Publisher: 水文・水資源学会編集出版委員会
ISSN： 0915-1389
河川氾濫を対象とした洪水リスクに対する適応策評価—Development of evaluation on adaptation in flood risk under climate change—気候変動適応推進のための科学的知見の創出に向けて

風間聡, 山本道, 柳原駿太, 池本敦哉

地球環境　28　(1)　77-83　2023
Publisher: 東京 : 国際環境研究協会
ISSN： 1342-226X
社会経済シナリオSSP別の人口変動に伴う洪水氾濫・内水氾濫・斜面崩壊の曝露人口の変化

柳原駿太, 風間聡, 川越清樹

日本水文科学会学術大会発表要旨集　2021　2021
気候変動影響：自然災害（洪水）

風間聡

長野県の気候変動とその影響（信州気候変動適応センター）　21　2020/03
日本全国洪水氾濫解析による気候変動への緩和策及び土地利用規制の評価—Estimation of the mitigation and the landuse control for climate change based on the flood analysis in Japan

山本道, 風間聡, 峠嘉哉, 多田毅, 山下毅

地球環境研究論文集 : 地球環境シンポジウム / 土木学会地球環境委員会編　28　141-150　2020
Publisher: 土木学会
提言「22世紀の国づくり」から考える22世紀に誇る土木 Peer-reviewed

風間聡

土木学会誌，論説・オピニオン　104　(8)　56　2019/08
最上川水系の河川整備の現状とこれから

風間聡

河川　867　(10)　29-32　2018/10
近年の豪雨災害の発生状況と土木学会による調査 Peer-reviewed

風間聡

土木学会誌　103　(3)　8-11　2018/03
気候変動と水災害

風間聡

公衆衛生　81　(12)　982-987　2017/12
ESTIMATION OF WATER-RELATED COMPOUND DISASTER POTENTIAL DAMAGE COST IN THE FUTURE USING ANNUAL MINIMUM PRESSURE

61　Ⅰ_139-144　2017
Publisher: 土木学会
ISSN： 1880-8751
内水氾濫頻発区域の地理的・人為的分布特性

中口幸太, 小森大輔, 風間聡

土木学会年次学術講演会講演概要集(CD-ROM)　72nd　2017
降雪・積雪・融雪のモデリング

風間聡

水工学に関する夏期研修会講義集　A　4-1-4-19　2016/08
洪水氾濫・高潮複合災害の被害額と伊勢湾台風被害額との比較

秋間将宏, 風間聡, 小森大輔

土木学会年次学術講演会講演概要集(CD-ROM)　71st　2016
DAD解析における確率降雨量と確率洪水流量の関係

菅原雄太, 高雷, 風間聡, 小森大輔

土木学会年次学術講演会講演概要集(CD-ROM)　71st　2016
気候変動によるタイ国の斜面崩壊影響評価

小森大輔, 井上尚達, 小野桂介, 渡部哲史, 風間聡

地球環境シンポジウム講演集　23rd　2015
米代川流域における分布型流出モデルのピーク流量誤差原因の評価

高雷, 風間聡, 小森大輔

地球環境シンポジウム講演集　23rd　2015
Hydrological Research Lettersの2014年現在の状況

仲江川敏之, 石田祐宣, 風間聡, 立川康人, 田中丸治哉, 中山恵介, 松山洋, 村上茂樹, 山中勤, 横尾善之, 陸旻皎

水文・水資源学会誌　27　(6)　320-324　2014/11/05

DOI： 10.3178/jjshwr.27.320 　

ISSN： 0915-1389
地球温暖化による気温上昇が源流域の底生動物群集に与える影響

新井涼允, 糠澤桂, 風間聡

地球環境シンポジウム講演集　22　77-79　2014/09
Publisher: 土木学会
気候変動と水問題：影響と適応

風間聡

グローバルネット　280　4-5　2014/03
タイにおける豪雨に伴う斜面崩壊危険度の将来予測

井上尚達, 風間聡, 小森大輔

地球環境研究論文集　22　2014
Hazard Mapping of Rainfall-induced Shallow Landslide in Phetchabun, Thailand

20　273-278　2012
Publisher: 土木学会
Effective use of flood water for agriculture by inundation ponds in the lower Mekong River basin Peer-reviewed

Amano, A, Kazama, S, Nagai, K, Chanon

81-88　2011/11
Extreme daily rainfall in Thailand using a gridded daily rainfall dataset: A frequency analysis with 6 types of plotting position formulae Peer-reviewed

Keisuke Ono, So Kazama

Proceedings of the 9th International Symposium on Southeast Asian Water Environment　57-64　2011/11
Water conflict vulnerability of Mekong countries in the near future Peer-reviewed

N.K.Gunasekara, S.Kazama, D.Yamazaki, T.Oki

Proceedings of the 9th International Symposium on Southeast Asian Water Environment　25-32　2011/11
速報東日本大震災による河川構造物の被害特性の報告

川越清樹, 風間聡, 横尾善之

地球環境シンポジウム講演集　19　15-20　2011/09
Publisher: 土木学会
Water disaster impact on climate change and its adaptation

So Kazama

Proceedings of International Symposium, Promoting Synergies among adaptation networks in the Asia-Pacific Region　27　2011/01/17
気候変動による日本の水資源の影響について～環境省地球環境研究総合推進費S-4の成果について～

風間聡

水利科学　54　(1)　17-32　2010/01
Analysis of snow covered areas in Japan

Kazama So

Annual report of the Society for the Promotion of Construction Engineering　44　13-16　2009/04/01
Publisher: Tohoku University
ISSN： 0288-9994
都市・流域への水害影響，気候変動特集

風間聡

水循環貯留と浸透　71　2009/03
Effects of climate change on coastal fresh groundwater resources

So Kazama, Luminda Lunawardhana

Japan-Thailand Estuary Workshop 2008　33-40　2008/08
水資源への影響

風間聡

温暖化影響総合予測プロジェクトチーム，地球温暖化「日本への影響」－最新の科学的知見－　11-19　2008/05
水環境・水資源分野

風間聡

環境省地球温暖化影響・適応研究委員会報告書，「気候変動への賢い適応」　1-35　2008/05
Effects of climate change on coastal fresh groundwater resources

So Kazama, Priyantha Ranjan, Luminda Lunawardhana, Masaki Sawamoto

Proceedings of International Workshop on Environmental and Health Risk for Sustainability in Arid Regions　2008/01
EVALUATION OF FLOOD DAMAGES FOR CLIMAIE CHANGE

Machida Soichiro, Kawagoe Seiki, Kazama So, Sawamoto Masaki, Yokoki Hiromune, Yasuhara Kazuya

Doboku Gakkai Ronbunshuu G　15　155-160　2007/09
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/proge.15.155 　

ISSN： 1884-8419

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Flood damage cost was estimated based on numerical simulation with land-use category and the flood control economic research manual. The flood simulation was carried out by the distributed extreme precipitation data and the flood model in the whole country. The flood damages were assessed by the simulation results every return period and the flood damages calculation method. The results obtained are; 1) The inundation damage cost increases almost linear as the extreme precipitation increases, 2) When considering that the flood control measures to the extreme precipitation until the return period 50 years are completed, new measure costs are expected about 22 trillion yen to the probability precipitation of the return period 100 years, and 3) Similarly, when assuming the return period 30 years, the measures costs of about 36 trillion yen are needed.
Flood damage evaluation in Japan under climate change

So Kazama, S. Machida, S. Kawagoe, M. Sawamoto, K. Yasuhara, H. Yokoki

Proceedings of the international symposium Mitigation and adaptation of climate-change-induced natural disasters　171-180　2007/07
メコン流域における水と感染症3，カンボジアのおける洪水と感染症

風間聡

モダンメディア　53　148-154　2007/06
Analysis of seasonal variation of waterborne infectious diseases using hydraulic inundation simulation

So Kazama, Toshiki Aizawa, Toru Watanabe, M. Sawamoto

Proceedings 2nd International Symposium on development of water resource management system in the Mekong Watershed　69-76　2006/12
Global Warming and Snow Water Resources

KAZAMA So

Journal of snow engineering of Japan　22　(1)　18-21　2006/01/01
Publisher: 日本雪工学会
ISSN： 0913-3526
地球温暖化と水資源

風間聡

土木技術資料　47　(11)　24-27　2005/06
東北地方における水資源としての積雪

風間聡

2005年度雪氷防災研究講演会報文集　9-14　2005/05
The Study on the Interaction Between Snow Accumulation and Vegetation

ASAOKA Yoshihiro, KAZAMA So, SAWAMOTO Masaki

Annual report of the Society for the Promotion of Construction Engineering　40　71-75　2005/04/01
Publisher: Tohoku University
ISSN： 0288-9994
2003年5月スリランカの豪雨災害

牛山素行, 風間聡

国際建設防災　14　42-52　2004/12
Geotechnical aspects of riverbank erosion along the Mekong River in Vientiane

Asano, Takashi, M. Kazama, R. Uzuoka, N. Sento, S. Kazama, N. Izumi, Takeshi Nakamura, Chanseng Phongpachit

Proc. Int. Conf. on Advances in Integrated Mekong River Management　353-360　2004/10
Groundwater analysis in the lower Mekong region

Kazama, S, T. Hagiwara, M. Sawamoto

Proc. Int. Conf. on Advances in Integrated Mekong River Management　284-298　2004/10
Study on sediment movement in the middle Mekong River basin

Kudo, Makoto, S. Kazama, K. Suzuki, M. Sawamoto

Proc. Int. Conf. on Advances in Integrated Mekong River Management　103-109　2004/10
Fundamental Study on Application of Remote Sensing Technologies for Detection of Hydropower Plant in the World

KAZAMA So, SAWAMOTO Masaki

Annual report of the Society for the Promotion of Construction Engineering　39　11-14　2004/04/01
Publisher: Tohoku University
ISSN： 0288-9994
Flood benefit evaluation in Cambodia

So Kazama, Kengo Kakiuchi, Masaki Sawamoto

Proceedings of the international symposium on Managing Water Resources under Climatic extremes and natural disasters, IHP/UNESCO　145-150　2003/10
全測連コーナー「東北大学工学部土木工学科」

風間聡

全測連合　35　(1)　45-48　2003/06
Temporal and spatial inundation pattern revealed by numerical simulation of the 2000 flood in the lower Mekong

So Kazama, Terumichi Hagiwara an, Masaki Sawamoto

Proceedings of the international symposium on achievements of the IHP-V in Hydrological research, IHP/UNESCO　215-220　2001/11
Report on Flood and Inundation in the Mekong River Basin in 2000

KAZAMA So

Journal of Japan Society for Natural Disaster Science　19　(4)　493-500　2001/03
Publisher: 自然災害科学会
ISSN： 0286-6021

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The lower Mekong River flooded from July to December in 2000. Especially, Cambodia and Vietnam were serious on inundation. The numbers of victims were 347 in Cambodia and 448 in Vietnam. The amounts of damage were 80 million and 350 million US dollars in Cambodia and in Vietnam, respectively. Water level reached to a record-breaking height at PhnonPenh. The main reasons of this flood were that heavy rainfall began earlier and two tropical cyclones approached to the catchment area. Other reasons were that some portions of dikes were changed to bridge to protect roads, Colmatage worked as intake from the main river and sedimentation deposited in channels and canals. Governments and international organizations are designing and planning some projects for flood control.
2000年メコン河洪水氾濫調査報告・速報

風間聡

土木学会誌　86　(2)　39-43　2001/02
Publisher: 土木学会
ISSN： 0021-468X
Construction of runoff model without discharge data

So Kazama, Yoshiyuki Yokoo, Masaki Sawamoto

Proceedings of Fresh Perspectives on Hydrology and Water Resources in Southeast Asia and the Pacific, IHP/UNESCO　136-142　2000/11
Estimation of evapotranspiration in the Mekong river basin

So Kazama, Goloka Behari Sahoo

Proc. of the AP-FRIEND workshop, Mekong Basin Studies, INCEDE report 2000-04　19　103-111　2000/01
Influence analysis of water balance and basin characteristics

So Kazama, NMNS Bandara Nawarathna

Proc. of Int. Sympo. on Floods and Droughts, IHP, Technical Documents in hydrology　4　679-688　1999/11
Evaluation of lumped model parameters using GIS

Le Trung TUAN, So Kazama

Proc. Asian Pacific FRIEND and GAME Joint Workshop on ENSO, floods and droughts in the 1990's in Southeast Asia and the Pacific　II　30-37　1999/06
Comparison of water balance in some tropical basins

So Kazama, NMNS Bandara Nawarathna

Proc. Asian Pacific FRIEND and GAME Joint Workshop on ENSO, floods and droughts in the 1990's in Southeast Asia and the Pacific　III　66-73　1999/06
Study on construction of lumped model without runoff data

Kazama, S, L.T. Tuan, Y. Yokoo

Proc. of Int. Workshop on Flood Forecasting for Tropical Regions　1-6　1999/05
Applied remote sensing technology to water resources

So Kazama

Civil Engineering Seminar, Advanced Technology in Civil Engineering for South East Asia Regional Development, Ministry of University affair, Thammasat University and JICA　199-206　1998/05
Observation of a Trailing Vortex from the Cape-Shionomisaki by the NOAA Satellite

KOJIMA Shoichiro, SAWAMOTO Masaki, KAZAMA Satoshi

15　439-440　1996/07

ISSN： 1342-8004
流域積雪分布データの作成

風間聡

河川情報センター助成研究成果報告集　2-9　1996/06
Eddy Structure of the Kuroshio in Enshu-Nada and Kumano-Nada.

KOJIMA Shoichiro, KAZAMA So, SAWAMOTO Masaki

14　117-120　1995/07/21

ISSN： 1342-8004
On the Assessment of Environment and the Estimation of Evaportranspiration using Satellite Data

KAZAMA So

Annual report of the Society for the Promotion of Construction Engineering　30　91-92　1995/04/01
Publisher: Tohoku University
ISSN： 0288-9994
リモートセンシングによる地上観測

風間聡, 沢本正樹

土木学会誌　80　(1)　10-13　1995/01

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Books and Other Publications 13

河川工学

風間, 聡, 小森, 大輔(防災工学), 峠, 嘉哉, 糠澤, 桂, 横尾, 善之, 渡辺, 一也(水理学)

理工図書　2020/09

ISBN: 9784844608844
気候変動適応策のデザイン = Designing climate change adaptation

三村, 信男, 太田, 俊二, 武若, 聡, 亀井, 雅敏

クロスメディア・マーケティング,インプレス (発売)　2015/03

ISBN: 9784844374091
気候変動に適応する社会

田中, 充, 白井, 信雄, 地域適応研究会

技報堂出版　2013/11

ISBN: 9784765534604
全世界の河川事典

高橋裕編集委員長

丸善出版　2013/07/30
-最前線の研究者たちに聞く- 地球温暖化研究のフロントライン

風間聡,他

国立環境研究所　2013/03
水文学

風間聡

株式会社コロナ社　2011/10/07

ISBN: 9784339056280

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土木・環境系コアテキストシリーズＤ-２
Climate change and global sustainability: A holistic approach

Akimasa Sumi, Nobuo Mimura, Toshihiko Masui編

United Nations University Press　2011/02

ISBN: 9789280811810
Introduction to Hydraulics

真野明, 田中仁, 風間聡, 梅田信

共立出版　2010/12/10
IR3S/TIGS叢書，No.2，サスティナブルな地球温暖化対応策

IR3S温暖化フラッグシッププロジェクト編, 住明正, 平松あい, 風間聡, 増井利彦, 一方井誠治, 松岡俊二, 田村誠, 三村信男

2010/04
川の百科事典

高橋裕編

丸善　2009/01
Groundwater for Sustainable Development

P. Bhattacharya, AL Ramanathan, A.B. Mukherjee, J. Bundschuh, D. Chandrasekharam, A.K. Keshari

Taylor & Francis / Balkema　2008/04
Civil Engineering 新たな国づくりに求められる若い感性

東北大学土木工学出版委員会

技報堂　2007/03
地球温暖化はどこまで解明されたか

小池勲夫他

丸善株式会社　2006/03/31

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Presentations 121

Flood benefits in the lower Mekong River International-presentation

The International Conference on “The Status and Future of the World’s Large Rivers　2011/04/13
水災害管理への応用

“だいち”衛星画像を活用した国土基盤整備シンポジウム　2011/02/03
Water disaster impact on climate change and its adaptation International-presentation

International Symposium, Promoting Synergies among adaptation networks in the Asia-Pacific Region　2011/01/17
メコン河の氾濫問題

河川講習会，建設コンサルタンツ協会東北支部　2010/12/03
Economic predictions of flood damages with respect to the extreme rainfall in Japan International-presentation

Climate Adaptation Futures Conference　2010/06/30
Downscaling output of global climate models with application to aquifer thermal regimes in the Sendai plain International-presentation

6th International Symposium on Environmental Hydraulics　2010/06/24
Water disasters, water resources and water environment on climate change International-presentation

Tohoku University Day, Bandung, Indonesia　2010/03/19
Adaptation for water problems for climate change -Japanese case studies- International-presentation

Seminar of Water Resources University, Honoi　2010/03/10
Adaptation for water problems for climate change, -Japanese case studies- International-presentation

The First International Workshop - coping strategies for water environmental challenges in Asia, Hanoi　2010/03/09
気候変動への水災害適応策の考察と問題点

土木学会東北支部技術発表会　2010/03/06
温暖化適応策研究の動向と問題点

電力中央研究所，研究交流サロン　2009/12/11
Discussion on food and land use change International-presentation

International conference on Sustainability Science in Asia, Bangkok　2009/11/23
『東北における地球温暖化影響と適応を考える！（地球温暖化と防災対策）』

第6回土木の日特別行事（防災シンポジウム），土木学会東北支部　2009/11/18

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コーディネーター
日本における豪雨災害 International-presentation

International open symposium of level of long-term stabilization of global warming and climate change risks　2009/11/17
Water resources impact on climate change in Japan International-presentation

Research workshop on future direction, Tokyo　2009/11/16
熱帯モンスーン域における氾濫地帯の水系感染症リスク評価

途上国におけるサステナビィティ構築に向けた環境及び健康リスクに関するワークショップ　2009/11/13
水文モデルを用いた広域の水生生物多様性評価－名取川流域を例として－

東北環境アセスメント協会，仙台　2009/06/25
水文モデルを用いた広域の水生生物多様性評価

流域生態系評価と新技術シンポジウム，リバーフロント整備センター　2009/04/03
Distribution function for estimating habitat suitability index in the Natori River basin International-presentation

7th International Symposium on Echohydraulics, Concepcion　2009/01/13
気候変動による日本の水問題

筑波大学水理懇談会　2008/12/02
気候変動による水災害の評価

東北地方整備局河川事業・河川総合開発事業調査担当者会議　2008/11/28
気候変動と災害リスク

農村研究フォーラム　2008/11/21
気候モデルを用いた水災害評価

温暖化影響評価のためのダウンスケーリングに関する研究会　2008/11/18
水災害－洪水氾濫と斜面災害の増加－

環境省地球環境研究総合推進費一般公開シンポジウム，地球温暖化の日本への影響～現状と将来予測，その対策と賢い適応へ向けて～　2008/10/30
Water resources in coastal areas International-presentation

The 3rd WEPA international conference on water environmental governance in Asia　2008/10/27
Effects of climate change on coastal fresh groundwater resources International-presentation

Luminda Lunawardhana

Japan - Thailand Estuary Workshop　2008/08/19
気候変動による水災害の評価

RIC講演会　2008/07/25
Hydrological Model for Multi-purposes International-presentation

Curtin University of Technology seminar　2008/07/16
Hydrological Model for Multi-purposes International-presentation

University of Merbourne seminar　2008/07/14
気候変動を考慮した広域水災害評価

ICHARM R&D seminar　2008/07/08
Adaptation cost analysis of flood for climate change International-presentation

AOGS　2008/06/18
気候変動を考慮した広域水災害評価

流域圏セミナー，名古屋大学　2008/06/10
「水」から地球温暖化をさぐる

東北七県電力活用推進委員会電力活用セミナー　2008/05/15
Impact assessment and adaptation International-presentation

IPCC-IR3S science syposium, Expert meeting　2008/04/18
ヒューマン・セキュリティと環境

東北大学・国際連合大学・国連大学協力会共催セミナー，人間の安全保障－恐怖からの自由，欠乏からの自由－　2008/04/16
AR5へ向けた影響評価ならびに適応策研究

気候変動将来推計情報の水文分野での利用促進シンポジウム　2008/04/03
バーチャルウォーターって何？

あいコープ宮城，食の安心・安全講座　2008/03/31
Flood damage evaluation in Japan under climate change International-presentation

TIGS symposium 2008, Adaptation strategies for climate change　2008/02/26
Effects of climate change on coastal fresh groundwater resources International-presentation

International Workshop on Environmental and Health Risk for Sustainability in Arid Regions　2008/01/28
温暖化による日本の水災害予測

建設コンサルタンツ協会東北支部講演会　2007/11/09
Flood benefit and risk International-presentation

Sustanable development seminar, Tashkent State University of Economics　2007/09
Flood damage evaluation in Japan under climate change International-presentation

The international symposium Mitigation and adaptation of climate-change-induced natural disasters　2007/09
メコン河に見る水とのつき合い方～水利用と被害～

第19回アゲ―ルシンポジウム　2007/03/06
気候変動に伴う斜面災害とダム堆砂について

建設コンサルタンツ協会東北支部河川講習会　2007/02/05
Flood damages in Japan and the Mekong International-presentation

UK-Japan collaboration seminar, Imperial College　2007/02
Mekong Researches using hydraulic simulation International-presentation

School Seminar, Water Resources University, 2nd base　2006/12
Mekong Researches using hydraulic simulation International-presentation

School Seminar, University of Natural Sciences, HCM　2006/12
Analysis of seasonal variation of waterborne infectious diseases using hydraulic inundation simulation International-presentation

3rd International symposium on the development of water resources management system in Mekong Watershed　2006/12
海面上昇による沿岸域の影響

環境省地球環境研究総合推進費一般公開シンポジウム，地球温暖化から未来をのぞく～生活と身近な環境への影響～　2006/11
東北地方における水資源としての積雪

2005年度雪氷防災研究講演会　2005/11
Runoff model applications for multipurpose International-presentation

Sultan Quboos University seminar　2005/11
水路の流れを考慮した氾濫シミュレーション

土木学会年次学術講演会　2005/09
教育・研究指導方法について－指導の工夫－

東北大学工学研究科教員ＦＤ，東北大学　2005/07
Flood benefit evaluation in the lower Mekong River International-presentation

AOGS　2005/06
Runoff model uses for multipurpose International-presentation

AIT seminar　2005/02
Uncertaintity of morphological data for rainfall-runoff simulation International-presentation

Proc the Int. Conf. on Sustainable water resources management in the changing environment of the Monsoon region　2004/11
Groundwater analysis in the lower Mekong region International-presentation

The Int. Conf. on Advances in Integrated Mekong River Management　2004/10
Adaptation of water resources in Japan International-presentation

Int. Workshop on adaptation strategies and practices in developed countries　2004/10
Asian river engineering problems and researches, -Techinical committee Ⅱactivities- International-presentation

The 3rd civil engineering conference in the Asian regions (CECAR)　2004/08
地球温暖化の現状とその将来予測について

夏の地球温暖化防止セミナー　2004/08
雪と森林がもたらす豊かな水資源

第3回摩周水環境フォーラム　2004/05
Flood benefit evaluation in Cambodia International-presentation

The international symposium on Managing Water Resources under Climatic extremes and natural disasters, IHP/UNESCO　2003/10
Prediction of Ungaged Basin International-presentation

PUB session / The international Conference of GIS and RS in hydrology, water resources　2003/09/16
灌漑と貯留施設を考慮したメコン河中流域の可能水資源量推定

水理講演会　2003/03
便益計算を用いたメコン河洪水氾濫総合評価の試み

水理講演会　2003/03
Spatial and temporal snow variation in Japan and flood assessment in the lower Mekong region International-presentation

Environmental Dynamics Seminar, The University of Western Australia　2003/01
Study on the 2000 Flood in the Lower Mekong by Field Survey and Numerical Simulation International-presentation

13th congress the APD/IAHR　2002/08
Temporal and spatial inundation pattern revealed by numerical simulation of the 2000 flood in the lower Mekong International-presentation

The international symposium on achivements of the IHP-V in Hydrological research, IHP/UNESCO　2001/11
海外緊急調査の課題と展望

土木学会年次学術講演会　2001/10

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パネラー
Simple analysis on future water resources in the Mekong basin International-presentation

XXiX IAHR Congress　2001/09
土木教育におけるインターンシップの活用と効果

工学・工業教育研究講演会，日本工学教育協会　2001/07
メコン川流域の水資源評価に関する基礎的研究

水理講演会　2001/03
メコン川洪水氾濫調査の報告－洪水・氾濫の物理過程－

第13回アゲールシンポジウム　2001/03
メコン河流域の水収支解析と水資源について

土木学会東北支部技術研究発表会　2001/03
Construction of runoff model without discharge data International-presentation

A Joint Conference of New Zealand Hydrological, Meteorological and Iimnological Society with Fresh Perspectives on Hydrology and water resources in Southeast Asia and the Pacific　2000/11
Study on construction of lumped model without runoff data International-presentation

12th congress the APD/IAHR　2000/11
河川工学研究の視点からみたメコン川における研究課題とその展望

第12回アゲールシンポジウム　2000/03
水文・地理情報に基づいた流域水資源管理の開発

土木学会東北支部技術研究発表会　2000/03
Estimation of evapotranspiration in Mekong river basin International-presentation

Workshop on Mekong Basin Studies　2000/01
Estimation of evapotranspiration in tropic region using satellite data International-presentation

Civil and Environmental Engineering Conference, New Frontiers & Challenges　1999/11
Influence analysis of water balance and basin characteristics International-presentation

Int. Sympo. on Floods and Droughts　1999/10
Hydrology and water resources using GIS with remote sensig International-presentation

Seminar in IISc, Indian Institute of Science　1999/08
Application of GIS and remote sensing for water resources International-presentation

Seminar in Yangon Technological University　1999/07
Study on construction of lumped model without runoff data International-presentation

Int. Workshop on Flood Forecasting for Tropical Regions　1999/06
Usage of climate indices for water resources evaluation International-presentation

Int. Conf. on Water Resources Management in Intermountane Basins　1999/02
Quantification of urbanization for water resources International-presentation

Workshop on ASEAN Infrastructure Planning & Management　1998/10
Evaluation of Tank model coefficients using GIS data International-presentation

Congress the APD/IAHR　1998/09
Development of simple snow density model for wide area International-presentation

International Water Resources Engineering Conference, ASCE　1998/08
Applied remote sensing technology to water resources International-presentation

Civil Engineering Seminar -Advanced Technology in Civil Engineering for SEA Regional Development-　1998/02
Estimation of the evapotranspiration distribution in Japan using NDVI International-presentation

Int. Conf. on Computing in Civil and Building Engineering　1997/08
広域における積雪全層密度推定に関する研究

水理講演会　1997/03
地域積雪分布推定法の開発

河川情報センター研究発表会　1996/12
Estimation of the snow depth distribution and snow water resources in wide area International-presentation

Int. Conf. on Water Resour. & Environment Resear. Towards the 21st Century　1996/10
Distributed snowmelt runoff model using satellite and didital elevation data International-presentation

Int. Workshop on Interactive Issues of Flood and Environment in Cold Regions　1996/10
気候示数を用いた水資源評価への試み

土木学会年次学術講演会　1996/09
Water balance in a heavy snow region International-presentation

Int. Conf. of Snow Engineering　1996/05
人間活動による損失植生の定量化

土木学会水理講演会　1996/03
衛星データを用いた東北地方の年水収支解析

土木学会水理講演会　1996/03
植生環境評価を用いた人間活動の評価

土木学会年次学術講演会　1995/09
降水分布データ作成法

水文・水資源学会研究発表会　1995/08
NOAA-AVHRRによるNPPとその損失推定

第5回生研フォーラム「宇宙からの地球環境モニタリング」　1995/06
東北地方の水資源について

土木学会東北支部技術研究発表会　1995/03
東北地方における降水の地形性について

土木学会年次学術講演会　1994/09
東北地方における積雪量の季節変化

水文・水資源学会研究発表会　1994/08
NOAA衛星による広域諸環境の観測

第2回地球環境シンポジウム　1994/07
衛星データを用いた東北地方の積雪水資源量推定

土木学会水理講演会　1994/03
東北地方のおける降水分布について

土木学会東北支部技術研究発表会　1994/03
人工衛星データからの雪線情報を用いた東北地方の積雪量推定

土木学会年次学術講演会　1993/09
Snow area detection by using AVHRR/NOAA International-presentation

IGARSS '93　1993/08
Water balance in the mountainous area with heavy snow International-presentation

IAMAP-IHAS '93　1993/07
東北地方の積雪量の計算について

土木学会水理講演会　1993/03
人工衛星データを用いた東北地方の積雪量推定

土木学会東北支部技術発表会　1993/03
NOAA-AVHRRによる雪域判定のAMeDASによる検証

土木学会年次学術講演会　1992/09
滝ダム流域における融雪期の積雪深モデル

土木学会水理講演会　1992/03
NOAA-AVHRRによる雪域判定のAMeDASによる検証

土木学会東北支部技術発表会　1992/03
NOAAによる残雪域の把握と融雪流出解析

第6回NOAA衛星によるデータ解析処理に関するワークショップ　1991/10
NOAA衛星による雪域判別

土木学会年次学術講演会　1991/09
衛星面積情報による滝ダム集水域の融雪量について

土木学会東北支部技術発表会　1991/03
NOAA-AVHRRデータを用いた残雪域の評価とその融雪流出タンクモデル解析への適用

文部科学省研費重点研究衛星による地球環境の解明，第2回シンポジウム　1991/02
NOAAのデータを用いた残雪域の把握と融雪流出について

土木学会年次学術講演会　1990/10
NOAAデータを用いた残雪域の把握と融雪流出についての考察

土木学会東北支部技術研究発表会　1990/03

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Research Projects 38

Hydrological and water resources influence caused by climate change Competitive

System: Global Environment Research Fund

2007/04 - Present
Evaluation of habitat using hydrological model Competitive

System: Grant-in-Aid for Scientific Research

2005/04 - Present
Analysis of water balance using remote sensing Competitive

1995/04 - Present
Creating a virtual experimental environment for planned inundation to optimize watershed flood control and its application to areas with advanced issues

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Fukushima University

2023/04/01 - 2027/03/31
Study on chage of hydrological processes and environments in small rivers under the population decline

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: Tohoku University

2020/04/01 - 2024/03/31
日本全国のため池の治水利用の評価

風間聡, 滝沢寛之, 柳原駿太, 池本敦哉

Offer Organization: 学際大規模情報基盤共同利用・共同研究拠点

System: 公募型共同研究

Category: 一般共同研究課題

Institution: 東北大学

2023/04 - 2024/03
日本全土の洪水氾濫被害と適応策の検討

峠嘉哉, 滝沢寛之, 風間聡, 山本道, 柳原駿太, 池本敦哉, 岡本彩果

Offer Organization: 学際大規模情報基盤共同利用・共同研究拠点

System: 公募型共同研究

Category: 一般共同研究課題

Institution: 東北大学

2022/04 - 2023/03
Evaluation of extreme rainfall distribution in spatial

Kazama So

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Challenging Research (Exploratory)

Institution: Tohoku University

2019/06/28 - 2022/03/31

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The spatial return period is defined as "the period until the extreme precipitation occurs again in the target area". We used d4PDF with spatial resolution of 20 km to analyze the large ensemble data of thousands of years. The use of d4PDF improves the accuracy of extreme precipitation estimation and also enables spatial analysis of extreme precipitation due to its spatial data. The spatial return period (RP) of the 100-year extreme precipitation over Japan is 1.61 years in the historical simulation and 1.14 years in the +4-K future simulation. We clarified the relationship between the annual area of occurrence of RP100-year extreme precipitation and its probability. In addition, Japan is divided into four areas according to latitude, and the spatial return period is compared for each region. It is found that the spatial return period of high latitude area such as Hokkaido region is about 1.7 times longer than that of low latitude regions such as Kyushu and Shikoku region.
Sustainable assessment of global inland lakes using terrestrial water circulation model

Touge Yoshiya

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2017/04/01 - 2022/03/31

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This study addressed the change of endorheic inland lakes. The hydrological analysis was conducted for "a cause of the change," and field surveys and observations were for "environmental impacts resulting from the change." In the terrestrial water circulation model, we performed a water circulation analysis considering climate change and human activities in the whole basin. The model could show that the water level of Lake Turkana was displaced to different levels before and after the low rainfall period around the year 2000. In addition to surveying the damage caused by the water level change in the surrounding area, meteorological observations and in situ measurements of soil moisture were conducted. Satellite monitoring of actual irrigated areas was also conducted, and the impacted area by severe drought in 2001 was accurately detected in the Aral Sea basin.
Development of a model estimating river biomass using hydrological and periphyton models to control ecological resources

Kazama So

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: Tohoku University

2016/04/01 - 2020/03/31

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Distributed model of periphyton was developed using a nutrient transport model and a water temperature model based on a distributed hydrological model. The model accuracy is RMSE=11.5mg/m2 monthly. Positive correlations were observed between the population densities and eDNA concentrations for orders Ephemeroptera, Plecoptera, and Dipetra. Field observations showed significant and positive correlation between periphyton and stream insect biomass. The variation of periphyton biomass as producer influenced consumer biomass in the higher energy position of ecological pyramid.
Study on policies for gaining popularity of rivers

Kazama So

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Challenging Exploratory Research

Institution: Tohoku University

2015/04/01 - 2018/03/31

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Discussion with government administrators, academic researchers, and high school students through SNS analysis, evaluation of economic value on river scenery, analysis of travel guide books provides the following conclusions to gain river popularity. First, it is necessary to improve accessibility and facilities to sightseeing places of river to make environment to use rivers easily except losing nature and landscape. Second, it is important to make places for playing river activities like fishing and canoe. Third, these places should have hydrophilic facilities for people to understand rivers well. Camp site is one of the most attractive places for river visitors.
Evaluation of impact by land fill in flood plains in the Mekong River

So Kazama

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2015/04/01 - 2018/03/31

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Landsat images can detect landfill areas in flood plains of the Mekong River. Multiple regression analysis shows correlation coefficient 0.34 using existence or nonexistence as an objective variable and annual maximum water depth, straight distance from central Phnom Penh to landfill area as explanatory variables. Landfill areas by wasted solids have 25 times more total phosphorus and 4 times more COD than those of floodplains. Landfill areas having factories have more iron than that of floodplains. One area has 21 times more than WHO standard of iron. Land use of agriculture can be classified by annual flood duration. NPP with 134kgC/m2 in flood plain will be lost in the case of change from present natural vegetation to agricultural area.
Development of A Prediction Model of Adaptive Evolution of Genetic Diversity under Climate Change

Watanabe Kozo

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Challenging Exploratory Research

Institution: Ehime University

2014/04/01 - 2017/03/31

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We projected adaptive genetic variations of four species of stream insect under climate change scenarios, using the distributed hydrothermal model and 8 global climate models. We modeled 11-31 selective AFLP loci per species, which were statistically identified to be subject to natural selection. We acquired bias-corrected air temperature and precipitation data of 3 RCP scenarios (CP2.6、RCP4.5、RCP8.5) from the GCMs. Then, these climatic data were used to calculate annual metrics of current velocity, water depth and water temperature using the hydrothermal model. Models describing adaptive genetic variation, which is represented as linear response of allele frequency at each locus under natural selection to environmental predictors, have been constructed based on current hydrothermal variables. Using the models, we estimated future changes of the allele frequency along changing climate gradients.
Analyses of river ecosystems structure based on habitat longevity concept

TAKEMON YASUHIRO

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: Kyoto University

2013/04/01 - 2017/03/31

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River ecosystems should be managed as a dynamic habitat mosaic system. This study clarified the disturbance regimes required for creating suitable habitat structure by a series of field monitoring of riverbed geomorphology and ecological functions from the aspect of habitat longevity. Suitable spawning redds of Ayufish were created by big floods of 4.5 year return period and degenerated by middle and small floods less than 1 year return period in the Tenryu River. Whereas flood plain ponds suitable for bitterlings and unionid mussels had the mud deposition of 5-10cm in depth and an inundation frequency less than three time per year at the moment of two years before (ponds at relative height of inundation period of 8-22days/year at present conditions) . corresponded to the amount of annual mean sediment load of 40,000-60,000m3/year in the Kizu River.
気候変動による水資源への影響評価と住民の適応策の総合評価手法の開発

風間聡, MANANDHAR Sujata

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 特別研究員奨励費

Institution: 東北大学

2013/04/01 - 2015/03/31

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スリランカ，ネパール，タイの流域においてそれぞれ87, 107, 48人の住民に聞き取り調査を実施し，気温，降水量，降水のタイミング，災害リスク等について，「強く感じる」～「ほとんど感じない」までの4段階の感覚を訊いた．また，性別や年齢，収入，教育についても聞き取りを行った．これらの観測データとは別にアジアとアフリカの43の関連研究のデータを用いた．これらによって43か国12,060人の農民のデータを収集した．GCMと流出モデルを用いた将来の気温，降水量，水災害のリスクの展望値を各地域で求め，その結果と上で得た住民（農民）の意識との比較を行った．気候変動の認識と展望値の一致度を4段階で点数化し，定性的な評価から定量化した．気候変動の理解度を計る指標として，気候変動理解指数CCPI（climate change perception index）を示した．解析の結果，以下のことを得た．1)全ての流域において67%の農民が気温上昇を感じている，2)多くの流域において約57%の農民が降雨の減少を感じている，3)わずかな流域の7%の農民が降水量の増加を感じている，4)約38%の農民が雨季が遅くなったと認識している，5)26%の研究において，農民の気候変動の認識が過去20年の気象変化によって決定づけられていることを示した，5)38%の農民が気候変動は人間活動によるものと考えている．本解析において利用されたCCPIは気候変動研究において，定性的な意識調査を定量的に評価できることを示した．CCPIは気候変動の地域の適応策を考える上で，有効なツールであるといえる．降雨は気温の変化よりも正しく農民に認識されていることが把握された．これらの比較結果は，住民の正しい気候変動の認識が大事であり，場合によっては間違った適応策を導くことがありうることを示した．
Genetic Assessment of Freshwater Biodiversity in The Alps in Relation to The Spatiotemporal Habitat Heterogeneity of Floodplain

OMURA Tatsuo, YOSHIMURA Chihiro, TAKEMON Yasuhiro, KAZAMA So, NISHIMURA Osamu, WATANABE Kozo

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: Tohoku University

2012/04/01 - 2015/03/31

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The purpose of this project is to indicate the target image of biodiversity and its formation mechanism for suitable river restoration in the European Alps through an intensive investigations of reference semi-natural basins remained in northeast Italy. We clarified the true species richness of stream invertebrate communities in the basins by addressing the potential problem of poor morphological taxonomy (e.g., many undescribed species) applying an new technique of DNA sequence based taxonomy. We found the ecological importance of spatial environmental heterogeneity among habitats and microhabitats (e.g. large woody debris) in sustaining the high biodiversity in the natural river system. In addition, satellite and mountain camera image analyses for tracing the temporal change of river geomorphology at reach scale allow us to understand significant role of large and frequent flood disturbances in sustaining the high species diversity in the natural floodplain system.
IMPACT OF CONTINENTAL RIVER INUNDATION TO FERTILIZATION AND VEGETATION

KAZAMA SO, OMURA Tatsuo, UMEDA Makoto, MASAGO Yoshifumi, NAKANO Kazunori

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2010/04/01 - 2014/03/31

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To evaluate fertilization of the Mekong River flood and inundation, we observed nutrient concentrations of flood water and nutrient amounts of soil at paddy fields located in the Mekong River flood plain and calculated nutrient balance. We obtained the following conclusions; 1) Sluice gate is more effective system than rubber gate at the point of nutrients utilization because water at the level of a lower layer has much nutrient due to the deposition. 2) Nutrient balance calculation expresses that the amounts of nutrients contained in soil and inundation water are sufficient to provide for rice production.3) The contribution ratio of flood to rice production that is presented in "the nutrients amount brought by inundation/the nutrients amount included in the harvested rice" are 98%, 50%, 88% and 17% about nitrate at Kandal, phosphorus at Kandal, nitrate at Takeo and phosphorus at Takeo respectively.
EVALUATION AND APPLICATION OF RELATIONSHIP BETWEEN SPECIE DIVERSITY AND GENETIC DIVERSITY USING HYDROLOGICAL DATA

KAZAMA SO, OMURA Tatsuo, NISHIMURA Osamu, MASAGO Yoshifumi, TAKEMON Yasuhiro, YOKOO Yoshiyuki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2010/04/01 - 2014/03/31

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Comparing genetic diversity of H. orientalis Martynov with species diversity using habitat suitability index in Natori River Basin, we obtained 1) both diversities were correlated, 2) dams prevented gene supply from upstream to downstream, 3) genetic diversity of H. orientalis Martynov in the upstream areas increased caused by H. albicephala Tanida intercrossed, as the results. That correlation can apply the distribution map of genetic diversity in the whole basin. This study provided the methodology to obtain the relationship between species and genetic diversities.
気候変動下における日本主要都市の可能地下熱エネルギー評価

風間聡, LUMINDANIROSHANAGUNAWARDHANA HewawasamGamage

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 特別研究員奨励費

Institution: 東北大学

2012 - 2012

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地下熱エネルギーを評価するために,気候と土地利用,人間活動を取り組んだ水と熱の移動を地表面と地下についてモデル化し,温暖化と都市化,経済活動による地下水温の上昇の影響を定量的に判断し,将来予測することを最終目標とする本年度は大きく,(1)水文+熱輸送モデルの作成,(2)現地観測データの収集,の2つを実施した.これらの作業の試験地域として秋田,仙台,山形,東京都市圏,中京都市圏,福岡の6地域取り上げた.モデルは,数値地図情報を基礎データとし,GCM(大気循環モデル)の出力データをもとに構築され,観測された地下水温データによって各種のパラメータの設定が行われた. (1)のモデル作成は2つの部分からなる.1つは陸域の地下浸透量を計算する地表面水収支モデル(水文モデル)である.これは土地利用と土質または地質データから降雨を蒸発散,浸透,表面流出に分配するものである.2つめは熱輸送モデルであり,熱の輸送を移流拡散式から推定する.これらのモデルの統合により,地下水温を時空間で導くことが可能となった.(2)として,モデルの検証のために上記6地域の地下水温データを収集した.広域へのモデル適用を睨んで,より広範な地下水温データの収集を行った.GCMの複数モデルと複数シナリオのCMIP5からのデータ収集をはかり,今後の不確実性評価に備えた. プロジェクト途中において,切り上げることになったが,今後もこれらのデータ,解析ツールを用いて成果を出す予定である.
International cooperation research concerning water-borne diseases in relocated people and the development of related risk management techniques

NAKAMURA Satoshi, MIDORIKAWA Yutaka, HABE Shigehisa, MATSUDA Hajime, MIDORIKAWA Kaoru, WATANABE Toru, NIHEI Naoko, SUZUKI Kotoko, KUROKURA Hisashi, KAZAMA So, MIYOSHI Miki, KIRINOKI Masashi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: Research Institute, International Medical Center of Japan

2010 - 2012

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The collaborative study demonstrated that the different infestation figures of human intestinal parasites between mountain and lowland areas along the Mekong in Lao PDR. Especially the liver fluke infections clarified that it was still high in the Capital area of the country. Furthermore, age, literacy, the use rate of the safe drinking water, and the ethnic tribe ratio were found out as risk factors by analyzing of the parasites rates and health survey data of the inhabitants relocated from mountain areas. Moreover, the risk-management technique practicalities were shown by using the factors such as creation of the risk maps in the country.
Estuarine environmental and morphological changes due to global warming and adaptation method against it

TANAKA Hitoshi, MANO Akira, KAZAMA So, UMEDA Makoto, SASAKI Mikio, NAGABAYASHI Hisao

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2009 - 2012

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There have a numerous number of investigations regarding possible environmental changes induced by future global climate change. However, very few researches have been made for estuarine environmental changes in future. Hence the present study focuses on (1) shoreline change around a river mouth, (2) equilibrium cross-sectional area at a river entrance, (3) salinity intrusion into a river and (4) salinity intrusion into ground water near a river mouth.
Biodiversity Mechanisms and their application to evaluation methods on river environment in pristine floodplain of the Tagliamento River

TAKEMON Yasuhiro, OOMURA Tatsuo, KAZAMA Satoshi, YOSHIMURA Chihiro, FUJITA Masaharu, TAKEBAYSHI Hiroshi, TSUTSUMI Daizo

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: Kyoto University

2009 - 2011

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In order to clarify the mechanisms for creation and maintenance of biodiversity in the floodplain of the Tagliamento River, we conducted a series of field works on measurement of the sediment production in the basin and monitoring surveys on the geomorphological changes in the floodplain using interval cameras. Faunal biodiversity of each habitat type within the flood plain was investigated based on DNA sequence data of the community level, and at the same time, parameters of community metabolism such as organic mater origin and respiration rate were also measured for each habitat type. Methods for prediction of changes in these ecological functions under changing sediment and flow regimes have been developed using 2D flow and sediment transport model in the braided river channels.
HAZARD MAP OF WATERBORNE INFECTION DISEASE IN THE MEKONG FLOODING AREAS

KAZAMA So, OMURA Tatsuo

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2006 - 2009

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We use the hydraulic flood simulation, coliform bacterium diffusion model, dose-response model and data of outpatient cases for quantitative analysis. The results obtained are as follows : 1. The incidence (incidence rate) of diarrhea as water borne diseases risk is 0.28 million people (21%) in the inundation area and 0.63 million people (17%) in the non-inundation area. 2. The inhabitants in the inundation area are exposed to drinking water polluted by coliform bacteria at 3.8CFU/ml on daily mean.
広域における生物多様性判定手法の開発

風間聡, 大村達夫, 澤本正樹, 渡部徹

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 萌芽研究

Institution: 東北大学

2006 - 2008

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試験流域として, 宮城県1級河川の名取川を対象とした. 既に当流域において開発されている水文モデルと水温推定モデルの改良を行い, 精度向上をはかった. 昨年から継続して, 対象流域において底生動物のサンプリングを行い, 数値地図情報および, シミュレーションによって作成した調査地点の環境データと生物データの関係について考察を行った. その結果から以下のことが理解された. メッシュ内部の群集の種多様性を表すα多様性をShannon指数とし, 分解能サイズ50mから5000mまでの7パターンを計算した. 分解能サイズ50mではα多様性が高い値が散っており, 多様性が高い地域の特定が困難である. この点において, 分解能2000mや5000mの分解能サイズでは, 中流域の南部の多様性が最も高く, 上流域全体や下流域の北部は多様性が低いことを示す結果となった. このことから, 地域間の多様性のばらつきを定量的に示すことができた. また, スリット化したダムと非スリット化ダムの上下流間, およびダムが無い流程の2地点間のSorenson指数を求めた. スリット化によって, ダム上下流間を生物が移動し易くなっているが, スリット化してから日が浅いダム下流の種構成はまだ回復していない. ただし, ダムが存在しない河川区間における種構成が低い場合もあり, これは河床材料の影響が大きい. 河床材料が大きく変化するダム上下流において類似性が低下しており, 河床材料の変化が群集構成に影響を及ぼしている.
Geomorphological processes due to intermittent sediment movements such as land slides and slope failures

IZUMI Norihiro, UZUOKA Ryosuke, KAZAMA So

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

2005 - 2007

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A mathematical model is proposed to describe the channelization on slopes composed of weakly cohesive fine sediment. The analysis is extended to include the case of slopes with arbitrary shapes. The spacing of incipient channels is found to be on the order of 1000 times the Froude critical depth of surface sheet flow. A mathematical model of channel bifurcation is also proposed. The analysis reveals that channel heads become unstable and channel bifurcation takes place when the discharge decreases. The results are found to be consistent with observations. The formation of channels due to seepage erosion is studied experimentally. It is found that governing parameters are discharge, slope and seepage layer thickness and that the spacing increases with those parameters. A liquefaction analysis for capillary zone above ground water level is developed based on porous media theory with three phases. Simplified governing equations are derived with the assumption that the relative acceleration of pore fluid with respect to soil skeleton is small. The proposed method can reproduce the tri-axial test results well when the degree of saturation is larger than about 70%. The numerical results show that liquefaction occurred in the capillary zone when the initial saturation degree is about 60% and over. Hydraulic gradient was analyzed by infiltration analysis with consideration of snowmelt. The probability and the road damage in the Tohoku region are shown in maps with 1 km resolutions. These maps show spatial-temporal risk distributions of sediment hazard due to some snowmelt conditions. We also focus on the influence of dam reservoirs to cause excessive sediment disasters due to anomalous weather conditions by global warming. Results of this study conform that the sediment hazard probability model performs well to predict macro scale sediment storage in dam reservoirs.
全球規模での温暖化による沿岸地下水質の影響と総合評価

風間聡, SARUKKALIGE Priyantha Ran, SARUKKALIGE Priyantha Ranjan

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 特別研究員奨励費

Institution: 東北大学

2005 - 2007

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全球規模の適用のためのGCM(大気循環モデル)の利用準備を行った.GCMの計算結果はインターネット上で公開されているHADCM3モデルによるSRES-A2の温暖化シナリオに基づいた将来予測を利用した.このモデルのデータに対応できるように地質や土地利用データを作成した.その後,構築された水文+水質+塩水浸入モデルの改良を行い,全球へ適用した.降水イベント(豪雨や少雨)毎にモデル結果と観測データを比較して検証し,モデルの問題点の改良をした.この結果,中央アメリカやオーストラリア北部において,2100年に顕著な地下水資源の減少が見られた.また,気候帯毎に将来の感度を調べたところ,中央アメリカと南アジアにおいて感度が高く,脆弱性の高いことが示唆された.これは人口増加も影響している. シミュレーションに様々な条件のデータを入力して,全球への適用を行い地下淡水資源の増減や汚染状況のマップの作成を試みた.特に沿岸地下水の減少が激しい地域において観測データを収集し,モデルの適用性について議論している.人口増加や土地利用の改変シナリオを用いた場合の地下淡水資源の増減や水ストレスのマップのアルゴリズムの開発を行っている.これらの結果によって,地域間の比較が行え,気候区分と人間活動の影響の把握が期待されている. これらグローバルな結果の検証のため,メコン川下流域とスリランカ,ワラウィ川流域のおいて,地域スケールの解析を行った.その結果,モデルの有効性が示されるとともに,地域レベルにおいても本手法の有効性が示された.
INTEGRATED STUDY ON WATER/ENERGY/MATERIAL CYCLE PROCESSES INCLUDING SNOW SEASON-LAKE BIWA PROJECT 4TH STAGE-

TANAKA Kenji, EBISU Nobuhiro, HIGUCHI Atsushi, MORIYAMA Toshiyuki, NAKAKITA Eiichi, KAZAMA SO

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: KYOTO UNIVERSITY

2004 - 2006

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To start the cold season's hydrological processes which have not been a target of the Lake Biwa Project since 1992, new observation system was established in Yogo mountain area, the origin of Yodo River Basin. To understand the snow accumulation and melting processes in the heavy snow area in temperate climate zone, snow depth and related meteorological elements are observed. Through various kinds of numerical experiments by nonhydrostatic meteorological models (ARPS-SiBUC, CReSiBUC), impacts of surface heating and soil moisture status for the formation of convective rain were investigated. The difference in the initial soil moisture distribution within realistic variation range does influence the location and intensity of rainfall. This result suggests the importance of day-to-day variation of soil moisture in short-range numerical weather prediction. In this study, land surface state (e.g. soil moisture and snow water equivalent) is estimated using land surface model SiBUC for the most part of Japan (excluding Okinawa). The atmospheric forcing data for SiBUC is created using operational meteorological data provided by JMA (e.g. AMeDAS, surface weather observation). This land reanalysis was carried out for 18 years (from 1991 to 2008) with about 10km horizontal resolution. The time series and horizontal distribution of snow water equivalent are compared with observation and other model product.
Downscaling of global observations into a local scale information

TAKEUCHI Kuniyoshi, OKI Taikan, TACHIKAWA Yasuo, KAWAMURA Akira, KUZUHA Yasuhisa, KURAJI Koichiro

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: University of Yamanashi

2004 - 2006

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The purpose of this study is to develop the method for "down scaling" from global-scale observations into local-scale hydrological information. This study is a part of Japan PUB (Prediction in Ungauged basins) group activity, and consists of following four main topics: -Stochastic hydrological model for prediction in ungauged basins. -Transferability of distributed hydrological model based on topographic similarity. -Near-real time forecasting of river flow using output of meso-scale atmospheric model -Global hydro-meteorological model considering the anthropogenic effect on water cycle -Design of new blind-test methodology for ungauged basins in Asian region The developed models/methods mentioned above are applied to the Irrawaddy river basin (Myanmar) to evaluate how these models can improve hydrological predictability in ungauged basins, and to show the uncertainty level on prediction in ungauged basins. Finally, "Myanmar-Japan Bilateral Workshop on "Predictions of Ungauged Basins (PUB) for Improved River Basin Management" (organized by Japan PUB research group, Water Training Center, and Irrigation Department of Myanmar) was held, and the result of application in Irrawaddy basin was reported. Through this workshop, future perspectives of prediction in ungauged basins, use of hydrological model for integrated river basin management in developing countries were discussed.
大河川の洪水・氾濫が周辺環境に及ぼす影響評価

風間聡

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 若手研究(B)

Institution: 東北大学

2003 - 2005

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洪水氾濫モデルと地下水涵養モデルを用いて,各メッシュの便堰を計算する基礎モデルの作成を行った.ここでは,(1)洪水氾濫モデルの実行と検証,(2)氾濫水位と継続時間を変数とした便益計算モデルの開発を行った.初年度に作成された洪水氾濫モデルと地下水涵養モデルを何年かのケースで実行させてみて,その結果を実測値と比較検証した.その結果,衛星画像の比較や水位データの比較によって開発されたモデルの有効性が示された.便益計算は氾濫の影響を受けると考えられる主要な因子,現時点では耕作,水産業,工業,衛生等の被害,便益を考え,水位と継続時間で便益,損害額が求められるモデルを提案した.便益計算モデルでは特に農業と工業の問題を扱い,個人が2期間だけ生き,どの時点をとっても経済には若年世代と老年世代の2つの世代を扱う重複世代モデルを利用した.これに洪水氾濫モデルを組み合わせることによって時系列の生産高および便益効果の高い地域を抽出した.その結果,当初は農業人口が多くを占めるので,氾濫面積の大きい方が高い経済成長を示すが,時間が経つにつれて,労働者が工業にシフトし,高い生産量を得ることとなり,最終的には氾濫域のない経済成長を選択することになることが理解された.特に氾濫面積が0〜1500km^2の成長過程では,最終的に大きな生産量の差は見られず,氾濫面積が大きくなると生産量の差が顕著になることが理解された.これは川沿いの氾濫域では農業の生産量が高いためである.衛生評価では,大腸菌の投入量及び時間当たりの大腸菌減少率を決定し,不定流式の流量フラックスとを計算した.ここでは時間当たりの大腸菌減少率を水深ごとの日光の強さと大腸菌残存率との関係から推算すると同時に濁度による日光への影響を考慮した.このモデルによって大腸菌の時系列分布を推定することが可能である.検証については最終年度の課題である.
雨季乾季のある大陸大河川の河岸侵食・土砂移動機構の解明

風間基樹, 渦岡良介, 仙頭紀明, 泉典洋, 風間聡

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 萌芽研究

Institution: 東北大学

2003 - 2005

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乾季と雨季で水位が大きく変動するモンスーン域の大陸河川の河岸侵食は水位が高水位から低水位に大きく落ち込む時期に,河岸が崩落することが知られている.本研究は、この現象のメカニズム解明のため,水位変動に応じて土の有効応力状態がどのように変化し,それが結果として河岸侵食にどのように影響しているのかを明らかにすることを目的としている. 平成16-17年の2年間,ラオスのビエンチャンにおけるメコン河河岸の地盤の水分状態,降雨量,河川水位を計測した結果を整理し,雨季乾季を通じての季節変動データから,河岸地盤の水分量と河川水位,降雨の関係を明らかにした。この結果,乾季初期の河川水位低下と背後地盤の水分変化にはタイムラグがあり,背後地盤から河岸方向への浸透流が発生する可能性が明らかとなった. 前年度に,現地河岸におけるボーリング調査時に採取した土砂を分析し,ラオスのビエンチャンの河岸地盤が比較的細粒のシルト層の上に,砂あるいは砂礫層が5mほど堆積している構造を持つこととそれら各層の力学特性を求めた。現地地盤の強度特性・透水特性を再現した遠心模型実験を新たに3ケース実施した.前年度と同様に,実験は水位が高い状態から,急激に水位を低下させる過程での水圧変化や斜面の安定性を検討したものであるが,地盤の粒度や河川水位の低下パターンを変化させた実験を行った。その結果,河岸地盤の崩壊メカニズムには,陸側に残留した間隙水圧によってパイピングが生じて進行的に破壊するメカニズムと,急激な水位低下によってすべり外力が増加し地盤のせん断強度が限界に達して滑り破壊を生じるメカニズムの二つがあることがわかった。これらの成果は,国内および国際会議に発表あるいは発表予定である。
Development of nutrient circulation model for ecological system control in estuary

SAWAMOTO Masaki, OMURA Tatsuo, MANO Akira, NISIMURA Osamu, IZUMI Norihiro, KAZAMA So

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: TOHOKU UNIVERSITY

2002 - 2004

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Title Development of nutrient circulation model for ecological system control in estuary In order to develop nutrient circulation model in estuary, the behavior of nutrient is investigated in river basin, river beds, rivermouth and estuary. The main results are as follows 1.The mechanism of nutrient origin in river basin was surveied and a numerical model was developed in the Natori River basin, The difference between ordinal flow condition and floods was clearly observed. The nutrient load was evaluated in various mode of transport. 2.The feature of nutrient transport in river was measured and modeled. Nutrient exchange between flow and river bed was anlysed and inportance of river bed was confirmed in circulation process. 3.Behavior of saline wedge was observed at the Abukuma rivermouth. The mixing processes of water and nutrient were analyzed. The spread of nutrient in the sea was also studied. 4.The equilibrium model for humic-iron complex in estuarine condition was developed on the basis of Dubye-Huckel theory taking account of the electrostatic interaction between iron and humic substance. The dissociation of humic-iron complex with increasing tonic strengh in estuaries was well explained by the developed model. 5.Behavior of ecosystem at the river mouth was estimated by the tidal flat model. It was found that microalgae on sediment decrease the accumulation of organic matters in the model. Furthermore, the model showed flow of organic matter in bivalve-dominant system become more active than that in control system. Therefore, bivalves might be useful to inhibit the accumulation of organic matters. 6.A physical model of staratification and mixing in closed bay was developed. The heat balance and water exchange at bay mouth were taken in consideration. The results show good agreement with observation.
地域開発度を考慮したマルチスケールな水資源評価

風間聡

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 若手研究(B)

Institution: 東北大学

2001 - 2002

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メコン河と名取川を対象に大スケールと小スケールの水資源評価モデル,流出モデルを構築した. 初めに集中型水資源モデルが,タイ,ラオス,ミャンマー国境地点からカンボジア,ラオス国境までの約35万km^2に構築された.基本式は,各水文過程で構成される水収支式である.各水文過程はタイとベトナムをテストエリアとして開発された土地利用に対応した推定式を用いた.水需要は,人口と一人当り水需要量と都市域の関係から推定された.その結果,乾季流量でも倍の人口に水を供給できること,灌漑開発が進むと年間6ヶ月が水不足になることが理解された.また,乾季は,わずかな灌漑面積拡大においても,水不足を引き起こすことが理解された.同時に利根川流域についても同様の解析を行い日本の場合は,都市用水の比重が大きいことが確認された. 詳細な評価のため分布型流出モデルも標高データから擬似河道を窪地処理して作成した.水文過程のパラメータを正方領域で与えるブロック型の集中モデルと,河道内計算を質量保存則で解くマスキンガム法を採用したBTOP-MCモデルによって10年間の流出計算を行った.その結果,推定誤差として人為的な貯留操作,主に水田と貯水池の効果の大きいことが認められ,土地利用とリモートセンシングを用いた水田域の貯留効果の推定式と降水量を考慮した貯水池操作モデルが提案された.また,同様のモデルを1級河川名取川においても適用した. 分布型モデルによって地域から流域全域の水資源評価が可能になった.水資源賦存量と同じ概念で時間単位が任意な水資源貢献量と上流からの水を考慮した可能水資源量の2つの指標を提案し,メコン河,名取川において水資源量を時空間で比較した.その結果,気候指数とは違う土地利用を考慮した水資源評価が可能であり,水資源開発計画に利用できることが確認された.また,メッシュサイズのスケールを変更することにより,スケールの違う議論も可能である.
Water-Man-Earth Interactions and Sustainable Water Resources-Cooperation in East Asia and Oceania

IKEBUCHI Shuichi, KOBATAKE Shigeki, SHIIBA Michiharu, KOJIRI Toshiharu, OISHI Satoru, KAZAMA So

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A).

Institution: KYOTO UNIVERSITY

1998 - 2000

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Problem regarding water, which is associated with population increasing, environmental change, development ofindustry and climate change, is very important for sustainable development of human being. We strongly and systematically promote an international cooperative research for solving the water problem of the target area by gatherins a lot of hydrological researchersunder name of AP-FRIEND. 1. We held three meetings at which many Japanese and non-Japanese researchers gathered. The meeting was held at Teague in Korea (November 7- 17, 1998), Nangjing in China (October 18-21, 1999) and Christchurch in New Zealand (November 18-27, 2000). At these meetings, discussions regarding database of hydrological observation data at eastern Asia and Oceania as well as total river basin management including flood and drought. 2. We support the Japan-Vietnam cooperative research by sending Japanese hydrological researchers to Mekong delta from March 5-12, 1999. The researchers surveyed river hydrological database at Vietnam. At the same time, they investigate the effect of human activity on the sedimentation and environment of the Mekong River. 3. We invited a Korean researcherto Japan and we dispatch Japanese researchersto Vietnam, Thailand, Australia and New Zealand to discuss the comparative hydrology and cooperative research. The subjects are as follows, cooperative research far scaling up problem off flood model, cooperative research for effect of vegetation change on flood volume, vegetation activity survey and cooperative research for effect of human activity and change of environment and climate on water resources.
気象衛星GMS画像の処理とデータベース化体制の確立による長期間の熱収支の解明

菊地時夫, 風間聡, 酒井敏

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 重点領域研究

Institution: 高知大学

1997 - 1997

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本研究においては、東京大学生産技術研究所において受信されている、GMS-5気象衛星(ひまわり)の高解像度データ(S-VISSR)を用いて、広範囲・高解像度で長期間の熱収支を解明することを目的としている。昨年度の研究では、衛星の位置・姿勢情報をもとにした系統的幾何補正と座標変換を施したデータを毎時間の受信直後に作成し、インターネット(http://weather.is.kochi-u.ac.jp/sat/GAME/)で提供する体制を確立したが、本年度は引き続きリアルタイムのデータ処理を継続するとともに、過去に溯ったデータの品質管理をおこないデータ処理ソフトと保存データの更新をおこなった。このデータはPGM画像データ形式をとっているため、ディスプレイに表示して内容を確認できるとともに、pbmplusなどのユ-ティリティによって簡単に領域の切り出しができる。本年は、その応用として日本付近の気象情報を表す画像を作成し、広く一般に利用開放しているが、1月に2万回以上の利用実績をあげている。また、ネットワークを通じた効率のよいデータ配付方式の検討や、8mmテープによる配付なども行なわれた。
多様な地表面での水・熱収支観測と衛星データとに基づく広域蒸発散量の推定法の開発

砂田憲吾, 風間聡, 広田知良, 大手信人

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 重点領域研究

Institution: 山梨大学

1997 - 1997

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地表面での水・熱収支観測方法の確立,簡潔な日蒸発散量推定手法の提案,衛星データを用いた広域蒸発散量の推定法の開発をめざして研究を実施し,以下のような結果が得られた. まず,GAME-TropicsプロジェクトにおけるAWS(Automatic Weather Station)の候補機種,PAMprototypeの雨季の熱帯モンスーン地帯での運用の問題点を抽出するため,タイ国スコタイ市近郊の水田において行われたテスト観測のデータを入手し,それらを解析した.その結果機器の設置や動作に大きな問題はなく,フラックス測定・算定に関し,特に水体の熱貯留の効果が,正味放射量と潜熱フラックスの日変化との間に大きな位相のずれを生じさせることが明らかになり,この熱収支項目の高精度な測定が必要となることが再確認された. 続いて,ルーチン気象観測項目と地温データより,蒸発量の季節変化を簡易に推定する熱収支モデルを開発し,このモデルを用いての蒸発量の季節変化の評価方法を吟味した.この方法は土壌パラメータ・境界条件の設定が容易なこと,必要なパラメータも概略値で良いことに特徴があり,北海道での裸地面の熱収支観測により結果が検証された.熱帯の雨期と乾期が明瞭なタイでの気象観測項目をデータとして用いると,蒸発量は年でバンコクが960mm,チェンマイが610mmと推定された. さらに,灌漑水田などで領域平均化が確認されている1km^2程度を要素として,東日本を対象とする蒸発散量推定を試みた.バルク法とエネルギー収支式を基本にNOAAデータによる地表面情報と,GPV(Grid Point Value)データによる気象値を組み合わせて広域の蒸発散量を求めるものである.地表面での温度分布や放射量の推定精度に不完全さが残り,対象全領域にわたっての十分適切な蒸発散量の推定に至らなかったが,地理条件のより一様な平野部では妥当な値を示すことが知られた.
Utilization of GMS Data for Estimation of Ganges River Run-off

NISHIMURA Hitoshi, KAZAMA So, SHI-IGAI Hiroyoshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: University of Tsukuba

1996 - 1997

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Hardware for GMS-WEFAX data acquisition and software for their fundamental processing were provided within the last fiscal year. Programs were further developed and implemented for statistical analyzes of cloud-surface temperature distribution obtained from IR image. For widescale hydrological studies associated with Ganges River basin, cloud coverage is properly represented by FC distribution, where FC is the rate of pixels indicating lower temperature than 215ﾟK in a small square frame of 1ﾟ latitude/longitude. This index was successfully introduced into trial analyzes on both short-term and long-term meteorology in the present region. Insufficiency in time resolution was pointed out in tracing May 1996 tornado which attacked Bangladesh. Notably steep FC gradient, however, was detected along the south-east edge of the tornado. Such a finding in large-scale meteorology is important for future tornado forecasting. Extensive analysis of FC distrbutions in 1996 monsoon season (May through september) revealed regular diurnal generation and decay of clouds over a wide area of Bangladesh and adjoining Ganges River and Bengal Bay. Variation in cloud coverage in comprehensively described by means of pseudo-vector expression. This technique will contribute to the macroscopic study of monsoon and associated precipitation. Existing data on regional topography, precipitation and river run-off were compiled, although they are sufficient neither in quality nor in quantity. The Disaster Prev.Res.Center of Kyoto Univ., however, has been paying appreciable efforts toward accumulation of ground truth data, and compilation of GMS data has also become an established routine work. These data will hopfully be correlated for forecasting of Ganges River run-off within several years.
気象衛星GMS画像の処理とデータベース化体制の確立による長期間の熱収支の解明

菊地時夫, 風間聡, 酒井敏

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 重点領域研究

Institution: 高知大学

1996 - 1996

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本研究においては、東京大学生産技術研究所において受信されている、GMS-5気象衛星(ひまわり)の高解像度データ(S-VISSR)を用いて、広範囲・高解像度で長期間の熱収支を解明することを目的としている。本年度の研究では、衛星の位置・姿勢情報をもとにした系統的幾何補正と座標変換を施したデータを毎時間の受信直後に作成し、インターネット(http://lips.is.kochi-u.ac.jp/sat/GAME/)で提供する体制を確立した。このデータはPGM画像データ形式をとっているため、ディスプレイに表示して内容を確認できるとともに、pbmplusなどのユ-ティリティによって簡単に領域の切り出しができる。本年は、その応用として日本付近の気象情報を表す画像を作成し、広く一般に利用開放しているが、1月に1万回以上の利用実績をあげている。
多様な地表面での水・熱収支観測と衛星データとに基づく広域蒸発散量の推定法の開発

砂田憲吾, 風間聡, 広田知良, 大手信人

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 重点領域研究

Institution: 山梨大学

1996 - 1996

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蒸発散は懸案地点の気象水文学的な局所性をもつ物理現象であるので,リモートセンシングを用いて広域を対象とする場合にも実態に即した合理的な評価が行われなければならない.このためには,現象の支配的な物理量の抽出,地点気象値の取り込みの可否,広域への展開基準(解像度・画素の集積)要素スケールなどの検討が不可欠となる.本研究では以下の点を重点的に検討した. (1)衛星リモートセンシングとの連携を念頭に開発されている最新の現地微気象観測システムを雨季の熱帯モンスーン地帯で運用する上での問題点の抽出.(2)測器の十分な保守管理を前提とするボ-エン比法に代ってルーチン的に長期に潜熱輸送量を観測推定する方法の検討.(3)均質と思われる地表面領域内での水・熱のフラックスの空間的な分布と変動の程度の検討.(4)リモートセンシングによる植生指標を用いた蒸発散推定での対象領域内の樹種の適切な地覆分類の考慮. 以上の研究の結果,タイの水田サイトでは,の水体の熱貯留の効果が,正味放射量と潜熱フラックスの日変化との間に大きな位相のずれを生じさせることが明らかとされ,この熱収支項目の高精度な測定が必要となることが再認識された.また,日単位以上の時間スケールの場合,入手容易なルーチンデータの日平均値より裸地面の顕熱輸送量は10W・m^<-2>程度の誤差で推定できることを明らかにした.一方,盛夏の灌漑水田において用いた2つの蒸発散モデルの場合とも領域平均量と分布量の平均値とはかなり類似した値(2%程度の差)が得られ,両推定式の結果に大きな違いがなかった.さらに,蒸散量の高精度の推定のためには植生指標を用いた落葉樹と常緑樹の地覆分類の可能性と精度についての議論が必要であることが分かった.

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Teaching Experience 12

River Engineering　Shizuoka University
Inland water dynamics　Tohoku University
Hydrology　Tohoku University
Hydraulic B and its exercises　Tohoku University
River Engineering　Ibaraki University
Water Resources Management with GIS　Asian Institute of Technology
Hydrological Modelling　Asian Institute of Technology
Hydrological Processes　Asian Institute of Technology
English for Engineers　University of Tsukuba
Hydrodynamics　University of Tsukuba
Complex function　University of Tsukuba
Hydraulic experiment　University of Tsukuba

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Social Activities 5

仙台二華高校SGH事業

2014/04/01 - Present

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アジアの水問題の解決
出前講義

2003/10 - Present

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水は誰のもの
JICA集団研修「乾燥地域における水資源環境管理コース」講師

2002/06 - Present

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途上国の技術者に水資源管理手法をレクチャーした．
JICA集団研修「地球温暖化対策コース」講師

2004/01 - 2010/12/01

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途上国の環境行政官に温暖化の適応策について講義した．
Climate and Land Use Changes May Affect Groundwater Resources

2006/06/01 -

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ＥＵ本部環境部の環境ニュースに掲載

Media Coverage 10

災害を想定したまちづくりを

建設新聞

2019/11/22

Type: Newspaper, magazine
インスタでデータ収集

河北新報社

2017/03/02
1.科学の泉，モンスーン域の大陸河川

2014/03/11

Type: Newspaper, magazine
持続可能な世界へ

茨城新聞社

2010/10

Type: Newspaper, magazine
危険度増す洪水被害

茨城新聞

2008/03/18

Type: Newspaper, magazine

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伝統的な治水見直しを
Effect of climate change and land use change on saltwater intrusion

The encyclopedia of earth

2007/04/11

Type: Other
水はめぐる水はつなぐ

東北電力東北から考える地球温暖化

2007/04

Type: Newspaper, magazine
富並川２児死亡河川の構造的な問題も

山形放送

2006/09/06

Type: TV or radio program
雪害と暮らしの研究

読売新聞

2006/03/25

Type: Newspaper, magazine
ホタル生息の適地を地図化

日刊工業新聞

2005/06/30

Type: Newspaper, magazine

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Other 32

緩和・適応統合実施による都市水害減災評価と費用便益分析

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緩和・適応統合実施による都市水害減災評価と費用便益分析
川の関心をあげるための活動の評価研究

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川の関心をあげるための活動の評価研究
沿岸・防災リスクの推定と全国リスクマップ開発

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沿岸・防災リスクの推定と全国リスクマップ開発
DNA多型マーカーを用いた河川水生昆虫の流域内地域間交流の評価

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DNA多型マーカーを用いた河川水生昆虫の流域内地域間交流の評価
人工衛星データを用いた高精度積雪分布モデルの開発

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人工衛星データを用いた高精度積雪分布モデルの開発
リモートセンシングとGPSを用いた積雪水資源量の推定と気候変動の影響予想

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リモートセンシングとGPSを用いた積雪水資源量の推定と気候変動の影響予想
温暖化の危険な水準及び温室効果ガス安定化レベル検討のための温暖化影響の総合的評価に関する研究

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温暖化による水資源の適応策の研究と評価
FCO (British Foreign and Commonwealth Office) Global Opportunities Fund

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FCO (British Foreign and Commonwealth Office) Global Opportunities Fund
温暖化による水資源への影響予測に関する研究

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温暖化シナリオに応じた水資源問題の定量化とリスクマップの作成を行う．
温暖化の危険な水準及び温室効果ガス安定化レベル検討のための，温暖化影響の総合的評価に関する予備的研究

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温暖化に伴う水資源の問題とその対応策について調査した．
熱帯モンスーン域大河の河岸侵食機構の解明

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熱帯モンスーン域の大陸性河川の河岸侵食の地中流の影響を調査，解析した．
積雪の変化が流域水環境に与える影響について

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温暖化が及ぼす積雪環境を流出，積雪モデルによって解析，評価した
メコン河の洪水・氾濫による地下水涵養に関する研究

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上流の開発がカンボジアの地下水涵養に及ぼす影響について解析した
山岳域における積雪分布の推定精度向上に関する研究

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広域山岳域の積雪深変化のシミュレーションを開発した
汎用河川氾濫シミュレーションソフトウエアの開発

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低平地の氾濫シミュレーションの開発
土地利用を考慮した氾濫水理解析と予測

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仙台東部の高分解能洪水氾濫解析を行った．
Snow survey in the Mt. Zao
山岳域における積雪分布の推定精度向上に関する研究

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衛星データやレーダー雨量計などを用いて山岳域の積雪深を精度よく推定することを試みる．
土地利用を考慮した氾濫水理解析と予測

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レーザープロファイルデータを用いて高精度洪水氾濫モデルを開発した．
汎用河川氾濫シミュレーションソフトウエアの開発

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GUIを備えた洪水氾濫ソフトを開発した．
メコン河を対象とした洪水・氾濫が及ぼす様々な影響の定量評価

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カンボジアの洪水氾濫が農業と漁業に与える影響について調査した
寒温帯における積雪の時空間分布解析（地球温暖化による生物圏の脆弱性の評価に関する研究）

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寒温帯における積雪の時空間分布解析（地球温暖化による生物圏の脆弱性の評価に関する研究）
Observation of ground and soil water profile in the Mekong River region
Water quality and ecological survey of the Natori River
融雪・植生の蒸発散量を考慮した広域的な水循環システムについて

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名取川流域の治水利水についての土地利用の影響を調査した．
メコン流域の水収支評価法の開発

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メコン流域の水収支評価法の開発
融雪・植生域の蒸発散を考慮した広域水循環

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融雪・植生域の蒸発散を考慮した広域水循環
融雪植生の蒸発散量を考慮した広域的な水循環システムについて

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リモートセンシングデータから植生情報を定量的に評価し，分布型流出モデルに組み込むことで高精度洪水予測を可能とした．
都市沿岸域の熱環境解析

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都市沿岸域の熱環境解析
メコン流域の蒸発散解析

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メコン流域の蒸発散解析
リモートセンシング、ブイ、気象データによるタイ湾の温度、熱収支解析

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リモートセンシング、ブイ、気象データによるタイ湾の温度、熱収支解析
積雪水資源量の推定

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積雪水資源量の推定

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