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Keiko Udo

Section

Graduate School of Engineering

Job title

Professor

Degree

博士（工学）（筑波大学）
修士（工学）（筑波大学）

researchmap

https://researchmap.jp/Keiko_Udo

J-GLOBAL ID

200901049818490396

e-Rad No.

80371780

Research History 6

2022/04 - Present

Tohoku University　Graduate School of Engineering　Professor
2012/04 - 2022/03

Tohoku University　International Research Institute of Disaster Science　Associate Professor
2017/03 - 2017/12

IHE Delft　Visiting Researcher
2010/04 - 2012/03

Tohoku University　Graduate School of Engineering　Associate Professor
2006/04 - 2010/03

Tohoku University　Graduate School of Engineering　Assistant Professor
2003/04 - 2006/03

Independent Administrative Institution Port and Airport Research Institute　Researcher

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Committee Memberships 58

国土交通省国土技術政策総合研究所　研究評価委員会委員

2025/04 - Present
国土交通省　社会資本整備審議会委員

2025/03 - Present
国土交通省　交通政策審議会技術分科会委員

2025/03 - Present
宮城県　沿岸海岸保全基本計画の変更に関する技術検討会委員

2025/01 - Present
岩手県　沿岸海岸保全基本計画の変更に向けた検討会委員

2025/01 - Present
International Conference on Asian and Pacific Coasts (APAC)　Member of International Steering Committee

2024/12 - Present
福島県　沿岸海岸保全基本計画の変更に向けた検討会委員

2024/08 - Present
Coastal Engineering (Elsevier)　Editorial Board Member

2024/02 - Present
日本学術会議　連携会員

2023/10 - Present
Coastal Engineering Journal (Taylor & Francis)　Associate Editor-in-Chief

2019/07 - Present
国土交通省　交通政策審議会技術分科会技術部会委員

2025/03 - Present
国土交通省　社会資本整備審議会技術部会委員

2025/03 - Present
国土交通省　社会資本整備審議会河川分科会委員

2025/03 - Present
仙台市科学館協議会　委員

2024/04 - Present
宮城県　公共工事等入札・契約適正化委員会委員

2023/04 - Present
国土交通省　交通政策審議会港湾分科会防災部会委員

2022/12 - Present
土木学会　海岸工学委員会沿岸災害デジタルツイン研究小委員会副小委員長

2022/11 - Present
仙台市　環境審議会委員

2022/04 - Present
土木学会　水工学委員会河川懇談会委員

2022/04 - Present
土木学会　海岸工学委員会沿岸域における気候変動適応策に関する研究会副査

2021/06 - Present
委員

2021/05 - Present
宮城県　高潮浸水想定の設定に関する検討会委員

2021/05 - Present
宮城県　女川原子力発電所環境調査測定技術会委員

2021/04 - Present
仙台市水道局　仙台市水道事業経営検討委員会委員

2020/11 - Present
宮城県　みやぎ建設産業振興懇談会委員

2020/08 - Present
土木学会　海岸工学委員会 Coastal Engineering Journal編集小委員会副小委員長

2019/06 - Present
国土交通省東北地方整備局　阿武隈川水系河川整備委員会委員

2016/12 - Present
国土交通省港湾局　港湾技術パイロット事業委員会委員

2016/09 - Present
土木学会　海洋開発委員会委員兼幹事

2014/04 - Present
国土交通省東北地方整備局　リバーカウンセラー

2010/03 - Present
International Conference on Coastal Engineering (ICCE 2028)　Member of Local Organizing Committee

2024/01 - 2028/05
国土交通省東北地方整備局　酒田港漂砂予測に関する検討会委員

2024/11 - 2025/03
国立研究開発法人新エネルギー・産業技術総合開発機構　2024年度「SBIR推進プログラム」（連結型）採択審査委員

2024/04 - 2025/03
国際津波・沿岸防災技術啓発事業組織委員会　濱口梧陵国際作文コンテスト選考委員会選考委員

2023/08 - 2025/03
土木学会　全国大会委員会委員

2022/12 - 2024/12
仙台市　広瀬川清流保全審議会委員

2013/02 - 2023/09
土木学会　学術研究活動の国際化ビジョン検討小委員会委員

2022/06 - 2023/03
国土交通省総合政策局　社会資本整備審議会河川分科会河川機械設備小委員会専門委員

2021/02 - 2023/03
土木学会　海洋開発委員会海洋開発論文集査読小委員会委員

2009/02 - 2022/05
土木学会　海岸工学委員会編集小委員会委員

2010/03 - 2021/11
国土交通省　東北管内設計波浪検討会委員

2020/06 - 2021/03
国土交通省水管理・国土保全局　気候変動を踏まえた海岸保全のあり方検討委員会委員

2019/09 - 2021/03
国立研究開発法人科学技術振興機構（JST）　国際緊急共同研究・調査支援プログラム（J-RAPID）評価委員

2019/02 - 2021/03
仙台市水道局　仙台市水道事業基本計画検討委員会委員

2018/11 - 2019/11
国立研究開発法人科学技術振興機構（JST）　地球規模課題対応国際科学技術協力プログラム（SATREPS）防災分野審査委員

2017/11 - 2019/05
Coastal Engineering Journal　Editor

2016 - 2019
土木学会海洋開発シンポジウム　実行委員会委員

2015/06 - 2017/06
国立研究開発法人科学技術振興機構（JST）　e-ASIA共同研究プログラム「防災」分野評価委員（アドバイザー）

2015/12 - 2017/03
国土交通省東北地方整備局　仙台湾南部海岸地区環境等検討懇談会委員

2011/12 - 2017/03
宮城県　新・みやぎ建設産業振興懇談会委員

2015/07 - 2016/03
一般財団法人沿岸技術研究センター　仙台塩釜港地形変化予測検討会委員

2014/02 - 2014/05
委員

2011/04 - 2013/03
The 8th APRU Research Symposium on Multi-hazards around the Pacific Rim　Member of Local Organizing Committee

2012/07 - 2012/09
土木学会　海岸工学委員会委員

2009/06 - 2011/12
土木学会　年次学術講演会プログラム編成小委員会委員

2010/04 - 2010/12
The 3rd International Conference on Estuaries and Coasts (IAHR)　Member of Local Organizing Committee

2009/02 - 2009/09
土木学会　全国大会実行委員会委員

2007/08 - 2008/11
国土交通省　交通政策審議会技術分科会技術部会

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Professional Memberships 2

JAPAN GEOSCIENCE UNION
Japan Society of Civil Engineers

Research Interests 6

climate change adaptation
fluvial sediment transport
coastal management
beach erosion
climate change
beach tourism

Research Areas 1

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

Awards 8

令和7年度科学技術分野の文部科学大臣表彰科学技術賞（科学技術振興部門）

2025/04　文部科学省　気候変動による砂浜消失の将来予測と適応策技術開発への貢献
JAMSTEC中西賞

2019/03　日本海洋工学会　気候変動に伴う海面上昇による全国の砂浜消失将来予測とその不確実性評価
Coastal Engineering Journal Award (Annual best paper award)

2018/11　JSCE Coastal Engineering Committee　Projections of Future Beach Loss in Japan Due to Sea-Level Rise and Uncertainties in Projected Beach Loss
平成28年度女性のチャレンジ支援賞

2016/06　内閣府
永年勤続委員表彰

2023/07　仙台市
第14回インテリジェント・コスモス奨励賞

2015/05　公益財団法人インテリジェント・コスモス学術振興財団
建設工学奨励金

2008/05　財団法人建設工学研究振興会　漂砂―飛砂複合輸送による砂浜変形過程の解明
第56回土木学会年次学術講演会優秀講演者表彰

2001/12　土木学会

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Papers 159

Regional economic losses of China's coastline due to typhoon-induced port disruptions Peer-reviewed

Zhenshiyi Tian, Yi Zhang, Keiko Udo, Xinzheng Lu

OCEAN & COASTAL MANAGEMENT　237　2023/04

DOI： 10.1016/j.ocecoaman.2023.106533 　

ISSN： 0964-5691

eISSN： 1873-524X
An estimate of the value of the beachfront with respect to the hotel room rates in Thailand Peer-reviewed

Chatuphorn Somphong, Keiko Udo, Sompratana Ritphring, Hiroaki Shirakawa

OCEAN & COASTAL MANAGEMENT　226　2022/07

DOI： 10.1016/j.ocecoaman.2022.106272 　

ISSN： 0964-5691

eISSN： 1873-524X
Comparing future climatic suitability to shoreline loss for recreational beach use: a case study of five Japanese beaches Peer-reviewed

Andrew Zajch, Micah J. Hewer, William A. Gough, Keiko Udo

REGIONAL ENVIRONMENTAL CHANGE　22　(2)　2022/06

DOI： 10.1007/s10113-022-01906-2 　

ISSN： 1436-3798

eISSN： 1436-378X
Coastal adaptation to Sea Level Rise: An overview of Egypt's efforts Peer-reviewed

Mahmoud Sharaan, Moheb Iskander, Keiko Udo

Ocean & Coastal Management　218　106024-106024　2022/03

DOI： 10.1016/j.ocecoaman.2021.106024 　

ISSN： 0964-5691

eISSN： 1873-524X
Climate change driven shoreline change at Hasaki Beach Japan: A novel application of the Probabilistic Coastline Recession (PCR) model Peer-reviewed

Ali Dastgheib, Carolina Martinez, Keiko Udo, Roshanka Ranasinghe

Coastal Engineering　172　104079-104079　2022/03

DOI： 10.1016/j.coastaleng.2021.104079 　

ISSN： 0378-3839

eISSN： 1872-7379
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)　Article Number 023004-023004　2021/02/01
Publisher: IOP Publishing
DOI： 10.1088/1748-9326/abce80 　

eISSN： 1748-9326

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Abstract Thailand plays a central economic and policy-making role in Southeast Asia. Although climate change adaptation is being mainstreamed in Thailand, a well-organized overview of the impacts of climate change and potential adaptation measures has been unavailable to date. Here we present a comprehensive review of climate-change impact studies that focused on the Thai water sector, based on a literature review of six sub-sectors: riverine hydrology, sediment erosion, coastal erosion, forest hydrology, agricultural hydrology, and urban hydrology. Our review examined the long-term availability of observational data, historical changes, projected changes in key variables, and the availability of economic assessments and their implications for adaptation actions. Although some basic hydrometeorological variables have been well monitored, specific historical changes due to climate change have seldom been detected. Furthermore, although numerous future projections have been proposed, the likely changes due to climate change remain unclear due to a general lack of systematic multi-model and multi-scenario assessments and limited spatiotemporal coverage of the study area. Several gaps in the research were identified, and ten research recommendations are presented. While the information contained herein contributes to state-of-the-art knowledge on the impact of climate change on the water sector in Thailand, it will also benefit other countries on the Indochina Peninsula with a similar climate.
Ten years after the 2011 Tohoku-oki earthquake and tsunami: Geological and environmental effects and implications for disaster policy changes Peer-reviewed

Kazuhisa Goto, Takashi Ishizawa, Yuichi Ebina, Fumihiko Imamura, Shosuke Sato, Keiko Udo

Earth-Science Reviews　212　Article Number 103417-103417　2021/01
Publisher: Elsevier BV
DOI： 10.1016/j.earscirev.2020.103417 　

ISSN： 0012-8252
An assessment of measured and computed depth of closure around Japan Peer-reviewed

Keiko Udo, Roshanka Ranasinghe, Yuriko Takeda

Scientific Reports　10　(1)　Article number 2987　2020/02/19
Publisher: Springer Science and Business Media LLC
DOI： 10.1038/s41598-020-59718-5 　

eISSN： 2045-2322
Projections of Future Beach Loss in Japan Due to Sea-Level Rise and Uncertainties in Projected Beach Loss Peer-reviewed

Keiko Udo, Yuriko Takeda

Coastal Engineering Journal　59　(2)　1740006-1　2017/06

DOI： 10.1142/s057856341740006x 　

ISSN： 2166-4250

eISSN： 1793-6292
日本全国の河川から海岸への土砂供給ポテンシャルと砂浜侵食との関係 Peer-reviewed

有働恵子, 武田百合子, 横尾善之

土木学会論文集B2（海岸工学）　72　(2)　799-804　2016
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.72.I_799 　

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 Amounts of sediment yield, sediment deposits in dam reservoirs, and sediment digging in rivers and the sea were analyzed, as well as river channel change, relative sea level rise, and beach width change from around 1950 to 1990 in Japan, to quantitatively clarify the effect of sediment balance in catchments from mountains, rivers, to the sea. The approximate total amount of the sediment yield is 5,600 million m³, sediment deposits 800 million m³, and river digging 1,600 million m³ in the period, respectively, and more than half of the sediment yield is estimated to be potential sediment supply from rivers to the sea. On the other hand, the approximate total amount of sand loss in the sea is 2,000 million m³ and sea digging 700 million m³, respectively. All these data used in this study cannot fully explain the sediment balance in the catchments; however, they revealed that the river digging could be one of the major factors which affected the beach erosion in the period.
IMPACT OF THE 2011 TOHOKU EARTHQUAKE AND TSUNAMI ON BEACH MORPHOLOGY ALONG THE NORTHERN SENDAI COAST Peer-reviewed

Keiko Udo, Daisuke Sugawara, Hitoshi Tanaka, Kentaro Imai, Akira Mano

COASTAL ENGINEERING JOURNAL　54　(1)　1250009-1-1250009-15　2012/03

DOI： 10.1142/S057856341250009X 　

ISSN： 0578-5634

eISSN： 1793-6292
Backshore coarsening processes triggered by wave-induced sand transport: the critical role of storm events Peer-reviewed

Keiko Udo, Akira Mano

EARTH SURFACE PROCESSES AND LANDFORMS　35　(11)　1269-1280　2010/09

DOI： 10.1002/esp.1951 　

ISSN： 0197-9337

eISSN： 1096-9837
Observations of wind-blown sand under various meteorological conditions at a beach Peer-reviewed

Keiko Udo, Yoshiaki Kuriyama, Derek W. T. Jackson

JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE　113　(F4)　F04008　2008/11

DOI： 10.1029/2007JF000936 　

ISSN： 2169-9003

eISSN： 2169-9011
Interdisciplinary exploration of coastal morphodynamics

Toru Tamura, Keiko Udo, Janaka Bamunawala

Coastal Engineering Journal　2025/01/02

DOI： 10.1080/21664250.2025.2461339 　
Digital twin paradigm for coastal disaster risk reduction and resilience

Shunichi Koshimura, Nobuhito Mori, Naotaka Chikasada, Keiko Udo, Junichi Ninomiya, Yoshihiro Okumura, Erick Mas

Probabilistic Tsunami Hazard and Risk Analysis　543-559　2025
Publisher: Elsevier
DOI： 10.1016/b978-0-443-18987-6.00024-5 　
Assessment of Beach Vulnerability to Coastal Erosion in China Considering Protective Measures in Beach Area Peer-reviewed

Shuai Xiao, Keiko Udo, Yi Zhang

Proceedings of the 11th International Conference on Asian and Pacific Coasts (APAC 2023)　747-755　2024/06/19
Publisher: Springer Nature Singapore
DOI： 10.1007/978-981-99-7409-2_68 　

ISSN： 2366-2557

eISSN： 2366-2565
Numerical Simulation of the Effect of Topographic Changes on Sandspit Intrusion Processes Peer-reviewed

Stephan Lawson, Keiko Udo, Hitoshi Tanaka

Proceedings of the 11th International Conference on Asian and Pacific Coasts (APAC 2023)　525-535　2024/06/19
Publisher: Springer Nature Singapore
DOI： 10.1007/978-981-99-7409-2_47 　

ISSN： 2366-2557

eISSN： 2366-2565
Satellite and UAV derived seasonal vegetative roughness estimation for flood analysis Peer-reviewed

Andre Araujo Fortes, Masakazu Hashimoto, Keiko Udo, Ken Ichikawa

Proceedings of IAHS　386　203-208　2024/04/19
Publisher: Copernicus GmbH
DOI： 10.5194/piahs-386-203-2024 　

eISSN： 2199-899X

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Abstract. One of the purposes of river management is the disaster protection of the nearby population. The effect of riparian vegetation on hydraulic resistance and conveyance capacity makes it a vital parameter for this purpose. With remote sensing techniques, vegetation information can be estimated. This paper's objective is to combine UAV and satellite imagery to obtain vegetation parameters with moderate resolution for hydraulic modeling, and to assess the seasonal effect of the vegetation on the Manning coefficient. Typhoon Hagibis was simulated with a 2D hydraulic model with a dynamic vegetative roughness estimation routine. Results demonstrate that this method achieved less error than the traditional static roughness value method of hydraulic modeling. The seasonal effect of the vegetation on the roughness was shown by a relationship between the percentage of vegetation cover and the average Manning in the stretch.
Littoral Drift Impoundment at a Sandbar Breakwater: Two Case Studies along the Bight of Benin Coast (Gulf of Guinea, West Africa) Peer-reviewed

Stephan K. Lawson, Keiko Udo, Hitoshi Tanaka, Janaka Bamunawala

Journal of Marine Science and Engineering　11　(9)　1651-1651　2023/08/24
Publisher: MDPI AG
DOI： 10.3390/jmse11091651 　

eISSN： 2077-1312

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This study assessed the deposition of sediment and shoreline evolution at two newly constructed port facilities in the Bight of Benin, West Africa. Based on the Building with Nature approach, the concept of a sandbar breakwater was implemented at the study sites. The coastal system of the bight is characterized by a sand barrier-lagoon system and a uniform prevailing wave climate, making it a favorable location for this innovative port solution. The case studies were undertaken at the Port of Lomé, Togo, and the Lekki Deep Sea Port (Dangote Sea Port), Nigeria, using remotely sensed shoreline positions and the one-line coastline change model for different periods. After construction of the breakwater, we estimated that the updrift coastline at the two locations accreted in the range of 10–23 m/year and the rates of sediment deposition were estimated to be in the magnitude of 1.0–7.0 × 105 m3/year. The comparative study conducted also showed that these rates could further reach a magnitude of 106 m3/year at other sediment-accreting landforms within the bight. We found that these large magnitudes of longshore sediment transport generated from very oblique incident waves (10°–20°) and sediment input from rivers (in orders of 106 m3/year) have enabled the realization of expected morphodynamic changes on the updrift shoreline of the ports. From these results, downdrift morphological changes should not be underestimated due to potential imbalances induced in the sedimentary budget along the coastline. Future developmental plans within the bight should also continuously aim to adopt nature-based solutions to protect the ecosystem while mitigating unforeseen implications.
Risk map of typhoon induced wave fields around Hainan Island Peer-reviewed

Fernando (Changyuan) Jiang, Zhenshiyi Tian, Yi Zhang, Keiko Udo

APPLIED OCEAN RESEARCH　137　2023/08

DOI： 10.1016/j.apor.2023.103603 　

ISSN： 0141-1187

eISSN： 1879-1549
Beach Conditions for Guiding the Sandy Beach Management in Phuket, Thailand Peer-reviewed

Sompratana Ritphring, Pattrakorn Nidhinarangkoon, Keiko Udo

JOURNAL OF MARINE SCIENCE AND ENGINEERING　11　(7)　2023/07

DOI： 10.3390/jmse11071457 　

eISSN： 2077-1312
EFFECTS OF SEDIMENT SUPPLY FROM MOUNTAINOUS AREA ON SEDIMENT TRANSPORT TO THE COAST IN THE ABUKUMA RIVER Peer-reviewed

SUZUKI Shimon, UDO Keiko, NAKAHARA Daisuke, TAKEBAYASHI Hiroshi

Japanese Journal of JSCE　79　(17)　23-17087　2023
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejj.23-17087 　

eISSN： 2436-6021

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In order to quantitatively discuss the sediment transport from the river to the coast, it is necessary to calculate the sediment loads. It is important to give the appropriate conditions of sediment amount and grain size distribution at the upstream boundary, taking into account the effect of sediment supply from the mountainous area. In this study, one-dimensional riverbed deformation analysis was conducted for the period 2000-2019 in the Abukuma River to evaluate the long-term effects of various upstream sediment inflow conditions on the sediment transport to the coast. When the sediment inflow from the upstream boundary was increased, the sediment supply to the coast increased, and the amount of sediment deposited in the river channel also increased. Medium and coarse sand were deposited 1-2 km downstream from the upstream boundary, and fine sand accounted for most of the sediment supply to the coast.
PRELIMINARY ANALYSIS OF CHARACTERISTICS OF POPULATION OF VISITORS TO SANDY BEACHES IN JAPAN USING MOBILE NETWORK DATA Peer-reviewed

UDO Keiko, ASANO Jinsaku, KOSHIMURA Shunichi

Japanese Journal of JSCE　79　(17)　23-17177　2023
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejj.23-17177 　

eISSN： 2436-6021

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In this study, the population change in sandy beaches across Japan were analyzed using hourly mobile network data for four years from 2019 to 2022 to obtain the characteristics of change in number of visitors to beaches. From the temporal changes in the monthly averages of the population in sandy beach meshes, the influence of seasonal changes and Covid-19 in the trend and fluctuations were different depending on the beach type. There are sandy beaches people comes from all over Japan and the same municipality. On the other hand, it is become clear that the lack of data due to restrictions on the available data concerning the protection of personal information makes difficult to obtain the actual population in places where the number of visitors is small.
A STUDY OF IMPACT OF PROXIMITY TO SANDY BEACHES ON HOTEL ROOM PRICES OF HIGH SEASON IN JAPAN Peer-reviewed

KAYANUMA Kohei, UDO Keiko

Japanese Journal of JSCE　79　(17)　23-17186　2023
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejj.23-17186 　

eISSN： 2436-6021

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This study applies the hedonic pricing method to hotel room prices for hotels located near sandy beaches throughout Japan to measure the marginal effect of proximity to sandy beaches on hotel room prices. We investigated the geographic distribution of marginal effects by performing both ordinary least squares (OLS) and geographically weighted regression (GWR). The results showed that proximity to sandy beaches had a positive effect on hotel room prices, but the statistically significant range was obtained at the hotels around Okinawa Prefecture. In these areas, proximity to sandy beaches was shown to raise hotel room prices by approximately 13% to 28%. On the other hand, there are still issues to be addressed in setting explanatory variables in order to construct a valid equation for various socioeconomic influences.
Projections of future beach loss along the Chinese coastline due to sea level rise Peer-reviewed

Xiao, S., Udo, K., Zhang, Y.

Coastal Engineering Journal　2023

DOI： 10.1080/21664250.2023.2265683 　

ISSN： 1793-6292 2166-4250
Dynamic roughness modeling of seasonal vegetation effect: Case study of the Nanakita River International-journal Peer-reviewed

Andre Araujo Fortes, Masakazu Hashimoto, Keiko Udo, Ken Ichikawa, Shosuke Sato

water　14　(3649)　1-19　2022/11/12

DOI： 10.3390/w14223649 　

eISSN： 2073-4441
Tracking the Historical Opening and Closure of Inlets along the Coast of Ghana Peer-reviewed

Stephan Korblah LAWSON, Keiko UDO, Hitoshi TANAKA

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)　78　(2)　I_1099-I_1104　2022
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.78.2_i_1099 　

ISSN： 1884-2399

eISSN： 1883-8944
Morphodynamics and Evolution of Estuarine Sandspits along the Bight of Benin Coast, West Africa Peer-reviewed

Stephan Korblah Lawson, Hitoshi Tanaka, Keiko Udo, Nguyen Trong Hiep, Nguyen Xuan Tinh

Water　13　(21)　2977-2977　2021/10/21

DOI： 10.3390/w13212977 　

eISSN： 2073-4441
The Comparative Study of Adaptation Measure to Sea Level Rise in Thailand Peer-reviewed

Sompratana Ritphring, Pattrakorn Nidhinarangkoon, Keiko Udo, Hiroaki Shirakawa

JOURNAL OF MARINE SCIENCE AND ENGINEERING　9　(6)　Article Number 588　2021/06

DOI： 10.3390/jmse9060588 　

eISSN： 2077-1312
EVALUATION OF SANDSPIT GROWTH AND LONGSHORE SEDIMENT TRANSPORT RATES AT THE “BOUCHE DU ROI” INLET, BENIN, USING REMOTELY SENSED IMAGES Peer-reviewed

Stephan Korblah LAWSON, Hitoshi TANAKA, Keiko UDO, Nguyen Trong HIEP, Nguyen Xuan TINH

Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)　77　(2)　I_667-I_672　2021
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.77.2_i_667 　

eISSN： 2185-467X
SANDSPIT ELONGATION AND LITTORIAL DRIFT AT THE VOLTA RIVER MOUTH, GHANA Peer-reviewed

Stephan LAWSON, Hitoshi TANAKA, Keiko UDO, Nguyen Trong HIEP, Nguyen Xuan TINH

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)　77　(2)　I_541-I_546　2021
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.77.2_i_541 　

ISSN： 1884-2399

eISSN： 1883-8944
CROSS-SHORE MODEL APPLICATION TO HASAKI BEACH, JAPAN Peer-reviewed

Koshi KATO, Keiko UDO

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)　77　(2)　I_613-I_618　2021
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.77.2_i_613 　

ISSN： 1884-2399

eISSN： 1883-8944
Cost-Benefit Analysis of Adaptation to Beach Loss Due to Climate Change in Japan Peer-reviewed

Kazunori Nakajima, Naoki Sakamoto, Keiko Udo, Yuriko Takeda, Eiji Ohno, Masafumi Morisugi, Ryuta Mori

Journal of Marine Science and Engineering　8　(9)　Article Number 715-715　2020/09/15
Publisher: MDPI AG
DOI： 10.3390/jmse8090715 　

eISSN： 2077-1312

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To measure economic effects of changes in environmental quality caused by climate change in Japan, we estimate beach loss damage costs in Japan and in each prefecture and evaluate the economic effectiveness of hypothetical adaptation measures to restore sandy beaches. For analyses, we use a computable general equilibrium model (CGE) that integrates a utility function with environmental quality factors as an independent variable derived from a recreation demand function in a travel cost method (TCM). We use future projections of beach loss rates in 2081–2100 based on ensemble-mean regional sea-level rise (SLR) for four Representative Concentration Pathway (RCPs) scenarios (RCP2.6, RCP4.5, RCP6.0, and RCP8.5). The main findings of our study are presented as follows. (1) In 2081–2100, beach loss damage costs were estimated respectively as 398.54 million USD per year for RCP2.6, 468.96 (m.USD/year) for RCP4.5, 494.09 (m.USD/year) for RCP6.0, and 654.63 (m.USD/year) for RCP8.5. (2) For all RCPs, six prefectures for which the cost–benefit ratio exceeds 1.0 were Kanagawa, Osaka, Hyogo, Hiroshima, Saga, and Kumamoto. Our hypothetical adaptation measure of an artificial beach enhancement is expected to be quite effective as a public works project in these prefectures.
Beach Nourishment as an Adaptation to Future Sandy Beach Loss Owing to Sea-Level Rise in Thailand Peer-reviewed

Chatuphorn Somphong, Keiko Udo, Sompratana Ritphring, Hiroaki Shirakawa

Journal of Marine Science and Engineering　8　(9)　Article Number 659-659　2020/08/26
Publisher: MDPI AG
DOI： 10.3390/jmse8090659 　

eISSN： 2077-1312

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A recent study suggested that significant beach loss may take place on the coasts of Thailand by the end of the 21st century as per projections of sea-level rise by the Intergovernmental Panel on Climate Change (IPCC). The present study adapts a framework and provides broad estimations for sand volumes and costs required to apply beach nourishment to each coastal zone in Thailand using a technique based on the Bruun rule assumption. Results indicate that a minimum of USD 2981 million (the best scenario) to a maximum of USD 11,409 million (the worst scenario) would be required to maintain all sandy beaches at their present width. Further, the effect of filling particle size on beach nourishment was analyzed in this study. The cost of beach nourishment ranges between USD 1983 and 14,208 million when considering filling particle size diameters of 0.5 and 0.2 mm. A zonal sand volume map for all 51 sandy beach zones in Thailand was created for use as an overview to help decision makers develop a more feasible adaptation plan to deal with the future sea-level rise for Thailand.
Impact of SLR on Beach-Tourism Resort Revenue at Sahl Hasheesh and Makadi Bay, Red Sea, Egypt; A Hedonic Pricing Approach Peer-reviewed

Mahmoud Sharaan, Chatuphorn Somphong, Keiko Udo

JOURNAL OF MARINE SCIENCE AND ENGINEERING　8　(6)　Article Number 432-432　2020/06/12

DOI： 10.3390/jmse8060432 　

eISSN： 2077-1312
Effect of Spatial Resolution on Nationwide Projection of Future Beach Loss Rate in Japan Peer-reviewed

Yuriko Takeda, Keiko Udo

Journal of Coastal Research　95　(sp1)　1310-1314　2020/05/26

DOI： 10.2112/si95-252.1 　

ISSN： 0749-0208

eISSN： 1551-5036
Projections of Proper Beach Nourishment Volume as an Adaptation to Beach Recession based SLR along the Nile Delta Coastline of Egypt Peer-reviewed

Mahmoud Sharaan, Keiko Udo

Journal of Coastal Research　95　(sp1)　637-642　2020/05/26

DOI： 10.2112/si95-124.1 　

ISSN： 0749-0208

eISSN： 1551-5036
Impact of Sea Level Rise on Tourism Carrying Capacity in Thailand Peer-reviewed

Pattrakorn Nidhinarangkoon, Sompratana Ritphring, Keiko Udo

Journal of Marine Science and Engineering　8　(2)　Article Number 104-104　2020/02/10
Publisher: MDPI AG
DOI： 10.3390/jmse8020104 　

eISSN： 2077-1312

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Sea level rise due to climate change affects beaches, which are a source of high recreational value in the economy. The tourism carrying capacity (TCC) assessment is one of the tools to determine the management capacity of a beach. Pattaya beach represents the character of well-known beaches in Thailand, while Chalatat beach represents the character of beaches that are the focus of domestic tourism. To evaluate beach area this study detected the shoreline position using Google Earth images with tidal correction. The Bruun rule was used for shoreline projection. TCC was calculated by using the beach area, correction factors, and management capacity. The results find that the current effective carrying capacity is approximately 200,000 for Pattaya beach and 49,000 for Chalatat beach. Although the Chalatat beach areas are larger than Pattaya, the effective carrying capacity of Pattaya beach is larger than the effective carrying capacity of Chalatat beach for all situations because TCC is affected by beach areas, correction factors, and management capacity. Because beach areas experience the effects of sea-level rise, protection against future beach loss should be considered for coastal management.
Projections of future beach loss along the mediterranean coastline of Egypt due to sea-level rise Peer-reviewed

Mahmoud Sharaan, Keiko Udo

Applied Ocean Research　94　Article Number 101972-101972　2020/01
Publisher: Elsevier BV
DOI： 10.1016/j.apor.2019.101972 　

ISSN： 0141-1187
SPATIO-TEMPORAL ANALYSIS OF SEDIMENT BALANCE IN THE YOSHINO RIVER BASIN Peer-reviewed

TERANAKA Yoshiteru, UDO Keiko, TAKEBAYASHI Hiroshi

Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)　75　(2)　I_829-I_834　2019
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.75.2_i_829 　

eISSN： 2185-467X

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In this study, we focus on the Yoshino River basin in the Shikoku region, Japan and calculate the sediment yield, dam sedimentation, riverbed fluctuation, and river mining from 1965 to 1999, estimating the amounts of sediments supplied from the rivers to the coast on the Kii Strait. The calculation indicated that the annual average values of sediment yield, dam sedimentation, riverbed fluctuation, river mining, from 1965 to 1999 were approximately 3 million m³/year, 0.7 million m³/year, −1.2 million m³/year, and 1.9 million m³/year, respectively. Using a sediment balance equation, the potential of sediment supply from the rivers to the coast was estimated to be 1.6 million m³/year. In addition, large amounts of sediments produced in the upper reaches of the Ikeda Dam, where steep mountains mostly occupy the area, were estimated to be largely deposited in the dam groups such as the Sameura Dam, the Yanase Dam and the Shingu Dam.
Analysis of exposure to vector-borne diseases due to flood duration, for a more complete flood hazard assessment: Llanos de Moxos, Bolivia

Moya Quiroga, V., Shuichi Kure, Keiko Udo, Akira Mano

Ribagua　5　(1)　48-62　2018/01/02

DOI： 10.1080/23863781.2017.1332816 　

ISSN： 2386-3781

eISSN： 2529-8968
The Yamamoto coast over five years; The reconstruction of an embankment with tsunami-induced embayment Peer-reviewed

Vo Cong Hoang, Hitoshi Tanaka, Yuta Mitobe, Keiko Udo, Akira Mano

Advances in Natural and Technological Hazards Research　47　387-403　2018
Publisher: Springer Netherlands
DOI： 10.1007/978-3-319-58691-5_22 　

ISSN： 2213-6959 1878-9897

eISSN： 2213-6959
Detection of Coastal Damage using Differences in Automatically Generated Digital Surface Models (DSMs): Application to the 2011 Off the Pacific Coast of Tohoku Earthquake Tsunami Peer-reviewed

Keiko Udo, Yuriko Takeda, Shunichi Koshimura

Journal of Coastal Research　85　696-700　2018

DOI： 10.2112/SI85-140.1 　

ISSN： 0749-0208

eISSN： 1551-5036
Assessing Future Coastline Change in the Vicinity of Tidal Inlets via Reduced Complexity Modelling Peer-reviewed

Bamunawala, J., Ranasinghe, R., Van Der Spek, A., Maskey, S., Udo, K.

Journal of Coastal Research　85　636-640　2018

DOI： 10.2112/SI85-128.1 　

ISSN： 1551-5036 0749-0208
Projections of Future Beach Loss due to Sea Level Rise for Sandy Beaches along Thailand's Coastlines Peer-reviewed

Ritphring, S., Somphong, C., Udo, K., Kazama, S.

Journal of Coastal Research　85　541-545　2018

DOI： 10.2112/SI85-109.1 　

ISSN： 1551-5036 0749-0208
Analysis of Wind Field over an Artificial Straight Dune by les Simulations Peer-reviewed

Kuribayashi, T., Udo, K.

Journal of Coastal Research　85　301-305　2018

DOI： 10.2112/SI85-061.1 　

ISSN： 1551-5036 0749-0208
Analysis of Beach Recovery After the 2011 Tohoku Earthquake Tsunami Based on Shoreline Extraction by ISODATA Peer-reviewed

Kaoru Tojo, Keiko Udo

Journal of Coastal Research　85　171-175　2018

DOI： 10.2112/SI85-035.1 　

ISSN： 0749-0208

eISSN： 1551-5036
Online information as real-time big data about heavy rain disasters and its limitations: Case study of Miyagi prefecture, Japan, during typhoons 17 and 18 in 2015 Peer-reviewed

Shosuke Sato, Shuichi Kure, Shuji Moriguchi, Keiko Udo, Fumihiko Imamura

Journal of Disaster Research　12　(2)　335-346　2017/03/01
Publisher: Fuji Technology Press
DOI： 10.20965/jdr.2017.p0335 　

ISSN： 1883-8030 1881-2473

eISSN： 1883-8030
Future projection of flood inundation considering land-use changes and land subsidence in Jakarta, Indonesia 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

DOI： 10.3178/hrl.11.99 　

ISSN： 1882-3416
Sediment balance from mountains to coasts in Japan: What is the cause of coastal erosion in the period from 1950 to 1990? Peer-reviewed

K. Udo, K. Morita, Y. Takeda, Y. Yokoo

Coastal Dynamics 2017　891-900　2017
Coastal morphology change before and after 2011 off the pacific coast of Tohoku Earthquake Tsunami at Rikuzen-Takata Coast Peer-reviewed

Udo, K., Takeda, Y., Tanaka, H.

Coastal Engineering Journal　58　(4)　1640016-1-1640016-16　2016/11/25

DOI： 10.1142/S0578563416400167 　

ISSN： 1793-6292 2166-4250
Mobilization of High Arsenic in the Shallow Groundwater of Kalaroa, South-Western Bangladesh Peer-reviewed

Tauhid-Ur-Rahman, M., Umme Ruman Siddiqi, Suichi Kure, Akira Mano, Keiko Udo, Yoshinobu Ishibashi

EXPOSURE AND HEALTH　8　(2)　159-175　2016/06

DOI： 10.1007/s12403-015-0177-3 　

ISSN： 2451-9766

eISSN： 2451-9685
Wind Turbulence Effects on Dune Sand Transport Peer-reviewed

Keiko Udo

JOURNAL OF COASTAL RESEARCH　75　333-337　2016/03

DOI： 10.2112/SI75-067.1 　

ISSN： 0749-0208

eISSN： 1551-5036
Overview of Super Typhoon Haiyan and Characteristics of Human Damage due to its Storm Surge in the Coastal Region, Philippines Peer-reviewed

Shuichi Kure, Yasuhito Jibiki, Kanako Iuchi, Keiko Udo

JOURNAL OF COASTAL RESEARCH　75　1152-1156　2016/03

DOI： 10.2112/SI75-231.1 　

ISSN： 0749-0208

eISSN： 1551-5036
Prediction of the 2011 Tohoku Tsunami Scouring near Structures Peer-reviewed

Tatsuki Iida, Shuich Kure, Keiko Udo, Akira Mano, Hitoshi Tanaka

JOURNAL OF COASTAL RESEARCH　75　872-876　2016/03

DOI： 10.2112/SI75-175.1 　

ISSN： 0749-0208

eISSN： 1551-5036
Connectivity Between Sediment Storage in Dam Reservoir and Coastal Erosion: Implications Through Zonal Mappings of Monitoring Data Peer-reviewed

Yoshiyuki Yokoo, Keiko Udo

JOURNAL OF COASTAL RESEARCH　75　725-729　2016/03

DOI： 10.2112/SI75-145.1 　

ISSN： 0749-0208

eISSN： 1551-5036
Analysis of Coastal Erosion due to the 2011 Great East Japan Tsunami and its Recovery Using Ground Penetrating Radar Data Peer-reviewed

Maya Takamura, Keiko Udo, Motoyuki Sato, Kazunori Takahashi

JOURNAL OF COASTAL RESEARCH　75　477-481　2016/03

DOI： 10.2112/SI75-096.1 　

ISSN： 0749-0208

eISSN： 1551-5036
Characteristics of Beach Erosion due to the 2011 Tohoku Earthquake and Tsunami and Its Recovery across the Entire Inundated Area Peer-reviewed

Kaoru Tojo, Keiko Udo

JOURNAL OF COASTAL RESEARCH　75　1252-1256　2016/03

DOI： 10.2112/SI75-251.1 　

ISSN： 0749-0208

eISSN： 1551-5036
EVALUATION OF FLOOD INUNDATION IN JAKARTA USING FLOOD INUNDATION MODEL CALIBRATED BY RADAR RAINFALL Peer-reviewed

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

土木学会論文集B1（水工学）　72　(4)　1243-1248　2016

DOI： 10.2208/jscejhe.72.I_1243 　
2004年インド洋大津波と2011年東日本大震災による汀線変化特性の比較 Peer-reviewed

有働恵子, 武田百合子

土木学会論文集B3（海洋開発）　72　(2)　175-180　2016
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejoe.72.I_175 　

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 This study compares the characteristics of shoreline change, i.e. erosion and recovery, of damaged coasts in Indonesia and Thailand due to the 2004 Indian Ocean Tsunami, with those of a damaged coast in eastern Japan due to the 2011 Great East Japan Tsunami. The results shows two major characteristics: (i) sand bar erosion and recovery at different positions and (ii) serious coastal erosion and insufficient recovery. In addition, the coastal recovery, having been observed until around one year later from the tsunamis, has not been observed after one year at all the coasts damaged due to the 2004 and 2011 tsunamis. These indicates that the coasts that insufficiently recovered after the 2011 tsunami would not recover at least in decades.
地中レーダ(GPR)を用いて把握した津波後の堆積構造の検証 Peer-reviewed

高村まや, 高橋一徳, Christian, N. KOYAMA, 有働恵子, 佐藤源之

土木学会論文集B2（海岸工学）　72　(2)　37-42　2016
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.72.I_37 　

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 The GPR exploration is used to analyze underground structures by transmitting electromagnetic waves and record reflections where the propagation characteristics change. The depth of reflection planes is calculated from the traveling time with the velocity of electromagnetic wave. In most cases, the velocity of electromagnetic wave is determined by the water content ratio of soil. In this study, we employed the common-mid-point (CMP) method and estimated the velocity to be 0.06 m/ns to recalculate the depth. Comparing with the CMP method, we found the method using the water content ratio presented a margin of error of approximately 0.7 m depending on the accuracy of ratio. We also analyzed soil properties such as water content ratio, relative magnetic permeability, grain size and density of soil particles of boring core, and compared with GPR data. The relative permittivity calculated from the water content ratios ranged from 5 to 66 and relative magnetic permeability from 1.00 to 1.02, indicating that the GPR captured the changes of relative permittivity underground. In addition, we found the water content ratios corresponding to relative permittivity show a linear relationship with the density of soil particles. This study suggests the necessity of paying attention to the possibility of a large margin of error when we use the water content ratio of soil to measure the depth of reflection planes.
DSMの半自動作成による2011年津波時の沿岸被害把握の試み Peer-reviewed

有働恵子, 武田百合子, 越村俊一

土木学会論文集B2（海岸工学）　72　(2)　1747-1752　2016
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.72.I_1747 　

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 Detection of coastal damage due to the 2011 tsunami at Yamamoto Coast was attempted by the state-of-art remote sensing technology using ALOS PRISM satellite images. The digital surface model (DSM) was generated semi-automatically using the remote sensing software EADAS IMAGINE and its accuracy was confirmed by comparing with the digital elevation model (DEM) generated by aerial laser measurement. The coastal damage detected by residual of DSMs before and after the tsunami was verified statistically for each landuse of residential district, rice field, coastal forest, and beach. It was difficult to detect the damage in the low land area where ground objects were scarce; however, it was possible to detect the damage of the coastal forest and residential district. Furthermore, the erosion around seawall could be detected using the DEM instead of the DSM before the tsunami since the former has higher accuracy than the latter.
CHANGES IN THE HYDROLOGIC DESIGN DISCHARGES DUE TO CLIMATE CHANGE : BOLIVIAN AMAZONIA Peer-reviewed

Moya Quiroga, V., Shuichi KURE, Keiko UDO, Akira MANO

土木学会論文集G（環境）　72　(5)　247-252　2016

DOI： 10.2208/jscejer.72.I_247 　
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 　
RECOVERY OF TSUNAMI-INDUCED CONCAVE SHORELINE BOUNDED BY HEADLANDS Peer-reviewed

Vo Cong HOANG, Hitoshi TANAKA, Yuta MITOBE, Keiko UDO, Akira MANO

土木学会論文集B1（水工学）　72　(4)　367-372　2016

DOI： 10.2208/jscejhe.72.I_367 　
Application of 2D numerical simulation for the analysis of the February 2014 Bolivian Amazonia flood: Application of the new HEC-RAS version 5

Moya Quiroga, V., S. Kurea, K. Udoa, A. Manoa

Ribagua　3　(1)　25-33　2016/01
Publisher: Informa UK Limited
DOI： 10.1016/j.riba.2015.12.001 　

ISSN： 2386-3781

eISSN： 2529-8968
Future fluvial flood risks in Central Vietnam assessed using global super-high-resolution climate model output Peer-reviewed

D. H. Nam, K. Udo, A. Mano

JOURNAL OF FLOOD RISK MANAGEMENT　8　(3)　276-288　2015/09

DOI： 10.1111/jfr3.12096 　

ISSN： 1753-318X
津波による地形変化に及ぼす人工リーフの効果に関する研究 Peer-reviewed

有働恵子, 武田百合子, 田中仁, 真野明

土木学会論文集B3（海洋開発）　71　(2)　653-658　2015

DOI： 10.2208/jscejoe.71.I_653 　
砂丘周辺の飛砂フラックスと風向風速特性との関係 Peer-reviewed

有働恵子

土木学会論文集B2（海岸工学）　71　(2)　529-534　2015
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.71.I_529 　

ISSN： 1884-2399

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This study analyzed instantaneous wind velocities and angle and aeolian sand flux over a coastal dune in order to clarify characteristics of wind and sand flux over complex terrain of dunes where large turbulence is generated. The horizontal turbulence intensity calculated using mean and standard deviation of horizontal wind velocity was approximated by a power equation of the mean horizontal wind velocity for various wind conditions. Furthermore, the horizontal turbulence intensity showed a negative relationship with the aeolian sand flux for various wind conditions. This indicates that the sand transport rate could be formulated using the turbulence intensity.
液状化を考慮した津波の戻り流れによる構造物周辺の洗掘メカニズム Peer-reviewed

飯田立樹, 呉修一, 有働恵子, 真野明, 田中仁

土木学会論文集B2（海岸工学）　71　(2)　241-246　2015
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.71.I_241 　

ISSN： 1884-2399

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The 2011 Tohoku Tsunami left many spots of deep and wide scouring near coastal structures such as levees, tidal gates, buildings, etc. The scouring caused major damage to the structures. There are two known scouring mechanisms; erosion by bottom shear stress and liquefaction by pore-pressure. The former is established; however, the latter has not been quantified. We advanced a quasi-3D numerical model by a finite volume method to simulate the flow and sediment transport. Temporal and spatial porepressure calculation under the ground was newly developed to find liquefaction. We applied the model to the breached spot of the coastal levee at Fujituka on the Sendai Bay Coast where the levees with gaps were assumed as the initial condition. We found the depth of liquefaction reached 28% of the maximum erosion depth by the bottom shear stress. We concluded that although erosion by the shear stress is the major process, liquefaction by the pore-pressure is also significant.
APPLICATION OF A TWO DIMENSIONAL FLOOD MODEL FOR DEFINING EVACUATION ZONES FOR CATTLE IN THE BOLIVIAN AMAZONIA Peer-reviewed

Moya Quiroga, V., Shuichi KURE, Keiko UDO, Akira MANO

土木学会論文集G（環境）　71　(5)　23-28　2015
Publisher:
DOI： 10.2208/jscejer.71.I_23 　
日本全国の海岸における過去の長期汀線変化特性の解析 Peer-reviewed

紀国亮, 有働恵子

土木学会論文集B2（海岸工学）　71　(2)　613-618　2015
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.71.I_613 　

ISSN： 1884-2399

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Sea level rise due to climate change will cause more serious beach erosion throughout the world in the future. Most of the existing studies projected the future beach erosion using the Bruun Rule; however, the Bruun Rule does not take into account the sediment supply from rivers and the longshore sediment transport. We investigated characteristics of the long-term beach erosion in Japan quantitatively and evaluated the validity of the Bruun Rule.<br> At 10 beaches in Japan where tide data exist for more than 100 years, we compared the shoreline changes measured using old maps in 1900, 1950, and 1990, with those calculated using the Bruun Rule. The shoreline changes calculated using Bruun Rule show good agreement with the measured shoreline changes from 1900 to 1950, but show disagreement with those from 1950 to 1990. It is considered that large amounts of sand were supplied to the coasts from the rivers before 1950, but the sediment supply from rivers might be reduced mainly due to dam constructions after 1950, and beaches have been eroded significantly. Then we modified the Bruun Rule to include the sediment supply and the longshore transport. The shoreline changes calculated using the modified Bruun Rule show good agreement with the measured ones from 1950 to 1990.
2011年東北地方太平洋沖地震津波による砂浜の広域被害特性の解析 Peer-reviewed

東條薫, 有働恵子, 真野明

土木学会論文集B2（海岸工学）　71　(2)　739-744　2015
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.71.I_739 　

ISSN： 1884-2399

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The 2011 Tohoku Earthquake and Tsunami caused significant shoreline damages over a wide area re-sulting from land subsidence by the earthquake and from erosion due to sediment transport by the tsunami. Most of the existing studies focus on significant local erosions and there are few studies that summarize the characteristics of erosion over a wide area. This study aims to clarify the overall characteristics of the 2011 earthquake and tsunami by satellite image analyses of shoreline changes at 74 coasts from Aomori Prefecture to Chiba Prefecture The satellite image analyses demonstrated that significant erosions occurred only at the seawall breach points and estuaries. The shoreline change data obtained from the satellite images also showed that sediment transport by the tsunami resulted in more significant shoreline retreat compared to inundation due to land subsidence. We investigated the relationship between the shoreline change due to the tsunami and overflow water depth over seawall. The result showed that significant erosions were caused locally by the seawall breaches when the overflow depth became positive or by the increase of estuary width. In other words, if seawalls had not been broken, the erosions were considerably mitigated since the seawalls could reduce the fluid force of the tsunami.
GPR（地中レーダ）を用いた津波後の堆積構造把握技術の開発 Peer-reviewed

高村まや, 有働恵子, 佐藤源之, 高橋一徳, 阿部朋弥

土木学会論文集B2（海岸工学）　71　(2)　1711-1716　2015
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.71.I_1711 　

ISSN： 1884-2399

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The 2011 Great East Japan Tsunami on 11 March 2011 induced extensive erosion along the Pacific coast. Significantly eroded Yamamoto Coast was one of the few coasts where coastal topography data was obtained from before to after the tsunami. To clarify the erosion and recovery processes from before to after the tsunami is important for coastal management; however, it still remains unclear because of lack of information at most of the eroded coasts. The purpose of this study is to develop a method to extract the coastal profiles during recovery process after the tsunami using ground-penetrating radar (GPR) without coastal topography data. GPR can image subsurface structure by radiating electromagnetic waves in the ground and receiving the reflected signals. By scanning GPR on the ground, we can obtain the imageof subsurface structures which reflect signals. We carried out field survey using GPR in Yamamoto coast eroded by 2011 tsunami and recovered to a degrees. We measured GPR on 4 survey lines set normal to shoreline, and sampled deposits along the survey lines. We read the points of the shoreline from aerial photos and extracted reflecting planes, estimated the ground forms when the photos were taken, from the image in the ground. As a result of analysis, the slopes of coastal profiles during the recovery were approximately 0.06-0.13. It is demonstrated that this method using the GPR is a very useful tool to understand the recovery processes after the tsunami at the coasts where measurement data does not exist.
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 　
Short-term flood inundation prediction using hydrologic-hydraulic models forced with downscaled rainfall from global NWP Peer-reviewed

Do Hoai Nam, Dang Thanh Mai, Keiko Udo, Akira Mano

HYDROLOGICAL PROCESSES　28　(24)　5844-5859　2014/11

DOI： 10.1002/hyp.10084 　

ISSN： 0885-6087

eISSN： 1099-1085
MORPHOLOGICAL CHANGES ALONG THE ISHINOMAKI COAST INDUCED BY THE 2011 GREAT EAST JAPAN TSUNAMI AND THE RELATIONSHIP WITH COASTAL STRUCTURES Peer-reviewed

Mohammad Bagus p Adityawan, Nguyen Xuan Dao, Hitoshi Tanaka, Akira Mano, Keiko Udo

COASTAL ENGINEERING JOURNAL　56　(3)　1450016-1450016　2014/09

DOI： 10.1142/S0578563414500168 　

ISSN： 0578-5634

eISSN： 1793-6292
Breach process simulation of coastal levees broken by the 2011 Tsunami Peer-reviewed

Tatsuki Iida, Shuichi Kure, Keiko Udo, Akira Mano, Hitoshi Tanaka

JOURNAL OF COASTAL RESEARCH　SI 66　302-307　2014/04

DOI： 10.2112/SI70-051.1 　

ISSN： 0749-0208

eISSN： 1551-5036
Effects of mud flows from the LUSI mud volcano on the Porong River estuary, Indonesia Peer-reviewed

Shuichi Kure, Bambang Winarta, Yuriko Takeda, Keiko Udo, Makoto Umeda, Akira Mano, Hitoshi Tanaka

JOURNAL OF COASTAL RESEARCH　SI 66　568-573　2014/04

DOI： 10.2112/SI70-096.1 　

ISSN： 0749-0208

eISSN： 1551-5036
Framework for proper beach nourishment as an adaptation to beach erosion due to sea level rise Peer-reviewed

Jun Yoshida, Keiko Udo, Yuriko Takeda, Akira Mano

JOURNAL OF COASTAL RESEARCH　SI 66　467-472　2014/04

DOI： 10.2112/SI70-079.1 　

ISSN： 0749-0208

eISSN： 1551-5036
Glacier ablation and water resources in Tropical Andes: the Condoriri glacier Peer-reviewed

V.Moya, A.Mano, Y.Asaoka, K.Udo, S.Kure, J.Mendoza

土木学会論文集B2 (水工学)　70　I_229-I_234　2014
Publisher:
DOI： 10.2208/jscejhe.70.I_229 　

ISSN： 1880-8751
水収支法を用いたボリビアTuni湖集水域での氷河融解量の推定 Peer-reviewed

白鳥総一郎, 真野明, 呉修一, 有働恵子

土木学会論文集B2（水工学）　70　(4)　I_421-I_426　2014
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.70.I_421 　

ISSN： 2185-467X

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Nowadays, global warming has been a hot issue. Melt water from tropical glaciers in the Andes is used as important water resources and retreat of the glaciers raises risk on the water availability in the future. Therefore water resources management is necessary, and it is important to investigate water balance in the snow-fed and glacier-fed basins in order to understand how much water is coming from snow and glaciers. This study challenges this issue, and the main purpose of the present study is to estimate glacier melt water in Tuni Lake basin, Bolivia which supplies water to the capital area. Because study area is located in high altitude, we could use limited data. From this point the degree-day method may be suitable for estimation of the glacier melt water. However, we need to determine degree day factor in the method. Therefore, we estimated the glacier melt water first by using a water balance method in order to determine degree day factor in the target basin.
k-εモデルによる植生のある急勾配流れの乱れ予測 Peer-reviewed

平田吉成, 真野明, 有働恵子, 呉修一

土木学会論文集B2 (水工学)　70　(4)　I_859-I_864　2014
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.70.I_859 　

ISSN： 2185-467X

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Vegetated flow in open channel is studied by many researchers. However, there are few studies about steep slope flows with vegetation. This study aims to predict turbulence property of this flow so as to estimate the degree of erosion at levees when flood flow occurs. Two models and two coefficients are used in this study. There are significantly different results due to the difference of coefficients which is not optimized from those which is optimized. Therefore, it is important to optimize coefficients to be applied. The prediction of turbulence property was improved by optimized coefficients in this study.
東北地方太平洋沖地震津波による海岸堤防破堤箇所周辺の侵食要因の考察 Peer-reviewed

飯田立樹, 呉修一, 有働恵子, 真野明, 田中仁

土木学会論文集B1（水工学）　70　(4)　I_1153-I_1158　2014
Publisher:
DOI： 10.2208/jscejhe.70.I_1153 　

ISSN： 1880-8751
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)　95-100　2014
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.
インドネシア・ジャカルタ洪水を引き起こす様々な社会問題と2013年1月洪水の特徴 Peer-reviewed

呉修一, Mohammad Farid, 福谷陽, Abdul Muhari, Jeremy D. Bricker, 有働恵子, 真野明

土木学会論文集G（環境）　70　(5)　211-217　2014
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejer.70.I_211 　

ISSN： 2185-6648

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On January 15,2013, heavy monsoon rains resulted in severe flooding in Jakarta city, West Java, Indonesia, which had resulted in 40 deaths, 45,000 refugees, and terrible economic damage. Jakarta city has experienced severe floods in 1996, 2002, 2007, 2013 and 2014. Such extreme flooding events might become more frequent in the future due to the impacts of land use change (urbanization) in the upstream region and climate change. Thus, it is important to understand the characteristics and mechanism of the 2013 Jakarta flood to prepare for the next flood disaster. In this paper, characteristics and several social factors contributing to the 2013 Jakarta flood were described, and a physically-based distributed rainfall-runoff inundation model was applied to the Ciliwung River basin in order to simulate the 2013 January flood in Jakarta. Simulation results matched reasonably well with the observed data, and it was found that the flood inundation occurred at the river section with the shortage of capacity flow in the lower part of the Chiliwung River.
海面上昇による全国の砂浜消失将来予測における不確実性評価 Peer-reviewed

有働恵子, 武田百合子

土木学会論文集G（環境）　70　(5)　101-110　2014
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejer.70.I_101 　

ISSN： 2185-6648

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This study estimates future beach erosion in Japan due to sea level rise and evaluates its uncertainty. Future beach erosion rate in Japan is estimated to be 47% for the sea level rise of 0.26 m which is the lower limit value and 91% for 0.82 m which is the upper limit value of future sea level rise reported in IPCC AR5. The erosion rate also corresponds to estimation values in an existing study which was estimated using a different beach dataset. It is inevitable that most of beaches in Japan will be affected seriously by the sea level rise even if we take into account the uncertainty in the estimation.
A method of estimating the optimal beach nourishment as an adaptation to beach erosion due to sea level rise Peer-reviewed

YOSHIDA Jun, UDO Keiko, KONO Tatsuhito, MANO Akira

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)　70　(2)　I_1386-I_1390　2014
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.70.I_1386 　

ISSN： 1884-2399

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This study presents a method to assess the value of the ecosystem and recreation of beaches on a nationwide scale, and impacts are assessed both without and with the optimal beach nourishment as adaptation to beach erosion due to sea level rise for RCP2.6 (0.39-0.47 m) and RCP8.5 (0.55-0.65 m). The optimal nourishment would cost about 660 billion yen for RCP2.6 and 110 billion yen for RCP8.5. Without nourishment, the Japan's total beach would disappear 84% for RCP2.6 and 94% for RCP8.5 by the end of 21st century. With nourishment, the optimal beach loss rate is estimated 57% for RCP2.6 and 70% for RCP8.5 by the end of 21st century. Considerable limitations remain due to the lack of consideration to ecosystems except beach plants, impacts of grain size on ecosystems, and frequency of beach nourishment.
Breaking process and mechanism of coastal levees on Sendai Bay Coast hit by the 2011 mega tsunami Peer-reviewed

Mano, A., Iida, T., Udo, K., Tanaka, H.

Journal of Coastal Research　65　772-777　2013/01/02

DOI： 10.2112/SI65-131 　

ISSN： 0749-0208 1551-5036

eISSN： 1551-5036
Downscaling super-high-resolution climate model output for extreme rainfall projection Peer-reviewed

Nam, D.H, K. Udo, A. Mano

Annual Journal of Hydraulic Engineering, JSCE　69　I_121-I_126　2013

DOI： 10.2208/jscejhe.69.I_121 　
Snow glacier melt estimation in tropical Andean glaciers using artificial neural networks Peer-reviewed

Moya Quiroga, V., A. Mano, Y. Asaoka, S. Kure, K. Udo, J. Mendoza

Hydrology and Earth System Sciences　17　(4)　1265-1280　2013

DOI： 10.5194/hess-17-1265-2013 　

ISSN： 1027-5606 1607-7938

eISSN： 1607-7938
Quasi-2D sediment transport model combined with Bagnold-type bed load transport Peer-reviewed

Sabaruddin Rahman, Akira Mano, Keiko Udo

JOURNAL OF COASTAL RESEARCH　SI 65　368-373　2013

DOI： 10.2112/SI65-063 　

ISSN： 0749-0208 1551-5036
インドネシア・ポロン川における泥火山噴出物の流出・堆積状況 Peer-reviewed

呉修一, Bambang WINARTA, 武田百合子, 有働恵子, 梅田信, 真野明, 田中仁

土木学会論文集G (環境)　69　183-190　2013
Publisher:
DOI： 10.2208/jscejer.69.I_183 　
Future Projections of Beach Erosion in Japan using Sea Level Change Data of the MIROC5 model Peer-reviewed

UDO Keiko, TAKEDA Yuriko, YOSHIDA Jun, MANO Akira

Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)　69　(5)　I_239-I_247　2013
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejer.69.I_239 　

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 This study estimates future beach erosion in Japan due to sea level rise using the latest sea level change data of the MIROC5 model for RCP2.6, RCP4.5, RCP6.0, and RCP8.5. In the vicinity of Japan, the sea level rise is estimated to be maximum of 0.3 m for RCP8.5, whereas it is estimated to be 0.2 m for the other RCPs. Then, the beach erosion in Japan is estimated to be maximum of 80-180 km² for RCP8.5 and 60-130 km for the other RCPs. The beach erosion will be accelerated in future compared to near future for all RCPs. Uncertainties of the estimation due to input data of beach characteristics are evaluated.
東北地方太平洋沖地震津波による宮城県仙台湾南部海岸の海浜変形特性 Peer-reviewed

有働恵子, 田中仁, 真野明, 武田百合子

土木学会論文集B2 (海岸工学)　69　I_1391-I_1395　2013

DOI： 10.2208/kaigan.69.I_1391 　
津波による旧川位置での河道形成と戻り流れの排水機能 Peer-reviewed

田中仁,Mohammad, Bagus Adityawan, 有働恵子, 真野明

土木学会論文集B2 (海岸工学)　69　(2)　I_411-I_415　2013
Publisher:
DOI： 10.2208/kaigan.69.I_411 　

ISSN： 1884-2399
東日本大震災津波による石巻海岸での海浜地形変化 Peer-reviewed

Nguyen Xuan Dao, 田中仁,Mohammad, Bagus Adityawan, 有働恵子, 真野明

土木学会論文集B2 (海岸工学)　69　(2)　I_281-I_285　2013
Publisher:
DOI： 10.2208/kaigan.69.I_281 　

ISSN： 1884-2399
Long-term area change of two tidal flats in Japan and its future projection due to sea level rise Peer-reviewed

Keiko Udo, Yuriko Takeda, Jun Yoshida, Akira Mano

JOURNAL OF COASTAL RESEARCH　SI 65　1975-1980　2013

DOI： 10.2112/SI65-334.1 　

ISSN： 0749-0208

eISSN： 1551-5036
Potential impact of climate change at five Japanese beaches Peer-reviewed

Jun Yoshida, Keiko Udo, Yuriko Takeda, Akira Mano

JOURNAL OF COASTAL RESEARCH　SI 65　2185-2190　2013

DOI： 10.2112/SI65-369.1 　

ISSN： 0749-0208

eISSN： 1551-5036
Assessment of future flood intensification in Central Vietnam using a super-high-resolution climate model output Peer-reviewed

Do Hoai Nam, Keiko Udo, Akira Mano

JOURNAL OF WATER AND CLIMATE CHANGE　4　(4)　373-389　2013

DOI： 10.2166/wcc.2013.088 　

ISSN： 2040-2244
Future salinity intrusion in central Vietnam assessed using super-high resolution climate model output and sea level rise scenarios Peer-reviewed

D. H. Nam, N. Q. Dung, K. Udo, A. Mano

Journal of Water Resource and Hydraulic Engineering　2　116-124　2013
Climate Change Impacts on Runoff Regimes at a River Basin Scale in Central Vietnam Peer-reviewed

Do Hoai Nam, Keiko Udo, Akira Mano

TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES　23　(5)　541-551　2012/10

DOI： 10.3319/TAO.2012.05.03.03(WMH) 　

ISSN： 1017-0839
INVESTIGATION OF TSUNAMI PROPAGATION CHARACTERISTICS IN RIVER AND ON LAND INDUCED BY THE GREAT EAST JAPAN EARTHQUAKE 2011 Peer-reviewed

Mohammad Bagus Adityawan, Min Roh, Hitoshi Tanaka, Akira Mano, Keiko Udo

JOURNAL OF EARTHQUAKE AND TSUNAMI　6　(3)　1250033-1250033　2012/09

DOI： 10.1142/S1793431112500339 　

ISSN： 1793-4311
Coastal and estuarine morphology changes induced by the 2011 great east Japan earthquake tsunami Peer-reviewed

Hitoshi Tanaka, Nguyen Xuan Tinh, Makoto Umeda, Ryutaro Hirao, Eko Pradjoko, Akira Mano, Keiko Udo

Coastal Engineering Journal　54　(1)　2012/03

DOI： 10.1142/S0578563412500106 　

ISSN： 2166-4250

eISSN： 1793-6292
River mouth morphoplogy change and its problems after the Great East Japan Earthquake Tsunami Peer-reviewed

Ryutaro Hirao, Hitoshi Tanaka, Makoto Umeda, Nguyen Xuan Tinh, Eko Pradjoko, Akira Mano, Keiko Udo

Journal of JSCE, Ser.B1 (Hydr.Eng.)　2012/03

DOI： 10.1142/S0578563412500106 　
COASTAL AND ESTUARINE MORPHOLOGY CHANGES INDUCED BY THE 2011 GREAT EAST JAPAN EARTHQUAKE TSUNAMI Peer-reviewed

Hitoshi Tanaka, Nguyen Xuan Tinh, Makoto Umeda, Ryutaro Hirao, Eko Pradjoko, Akira Mano, Keiko Udo

COASTAL ENGINEERING JOURNAL　54　(1)　1250010-1-1250010-25　2012/03

DOI： 10.1142/S0578563412500106 　

ISSN： 0578-5634
河川遡上津波の波速・流速の評価に関する研究 Peer-reviewed

盧敏, 田中仁, M. B. Adityawan, 真野明, 有働恵子

土木学会論文集B1 (水工学)　68　I_253-I_258　2012
RIVER MOUTH MORPHOLOGY CHANGE AND ITS PROBLEMS AFTER THE GREAT EAST JAPAN EARTHQUAKE TSUNAMI Peer-reviewed

HIRAO Ryutaro, TANAKA Hitoshi, UMEDA Makoto, NGUYEN XUAN Tinh, PRADJOKO Eko, MANO Akira, UDO Keiko

Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)　68　(4)　I_1735-I_1740　2012
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.68.I_1735 　

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The Great East Japan Earthquake Tsunami occurred on March 11, 2011 induced big change in coastal and estuarine morphology. Tanaka et al. (2011) has already made a report on these morphology changes. In this paper, subsequent morphology recovery process after the tsunami is investigated for several rivers in Miyagi Prefecture. It is found that at the Naruse and Natori rivers, recovery of the river mouth morphology is extremely slow due to limited amount of sediment supply from the adjacent coastal area with coastal structures interrupting longshore sediment movement, whereas the Nanakita River mouth and the Akaiko Lagoon show relatively quicker recovery. This result shows importance of sediment budget analysis and management covering not only riverine area but also surrounding costal area.
Coupling of Boussinesq and sediment transport model in a wave flume

Sabaruddin RAHMAN, Akira MANO, Keiko UDO

Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)　68　(4)　I_259-I_264　2012
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.68.i_259 　

eISSN： 2185-467X
Inflow Forecast Using Downscaled Rainfall From Global NWP For Real-Time Flood Control

Do Hoai NAM, Keiko UDO, Akira MANO

Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)　68　(4)　I_181-I_186　2012
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.68.i_181 　

eISSN： 2185-467X
Long Term Shoreline Change and Future Forecast Due to Climate Change in Five Japanese Beaches Peer-reviewed

吉田惇, 有働恵子, 真野明

土木学会論文集B2 (海岸工学)　68　(2)　1246-1250　2012
Publisher:
DOI： 10.2208/kaigan.68.I_1246 　

ISSN： 1884-2399
日本の干潟における過去の長期面積変化特性と海面上昇による将来の侵食予測 Peer-reviewed

有働恵子, 武田百合子, 吉田惇, 真野明

土木学会論文集G (環境)　68　I_279-I_285　2012

DOI： 10.2208/jscejer.68.I_279 　
経験的固有関数法を用いた鳥取砂丘の地形変化特性の解析 Peer-reviewed

満塩将太, 有働恵子, 永松大, 松原雄平, 真野明

土木学会論文集G (環境)　68　I_249-I_254　2012

DOI： 10.2208/jscejer.68.I_249 　
Breaching of Sandy Coast and Spit Due To The 2011 Tsunami and Their Recovery

Ryutaro HIRAO, Hitoshi TANAKA, Makoto UMEDA, Mohammad Bagus ADITYAWAN, Akira MANO, Keiko UDO

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)　68　(2)　I_581-I_585　2012
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.68.i_581 　

ISSN： 1884-2399

eISSN： 1883-8944
Urban flood inundation model for high density building area Peer-reviewed

Mohammad Farid, Akira Mano, Keiko Udo

Journal of Disaster Research　7　(5)　554-559　2012
Publisher: Fuji Technology Press
DOI： 10.20965/jdr.2012.p0554 　

ISSN： 1883-8030 1881-2473
海面上昇に伴う全国砂浜侵食量の推定 Peer-reviewed

須川太一, 有働恵子, 三村信男, 真野明

土木学会論文集B2 (海岸工学)　67　I_1196-I_1200　2011/10

DOI： 10.2208/kaigan.67.I_1196 　
2011年東北地方太平洋沖地震津波による海浜地形変化 Peer-reviewed

田中仁, 真野明, 有働恵子

土木学会論文集B2（海岸工学）　67　571-576　2011/10

DOI： 10.2208/kaigan.67.I_571 　
Exploring sustainability of aquifers based on predictive modeling of sorption characteristics of arsenic enriched Holocene sediments in Bangladesh Peer-reviewed

Tauhid-Ur-Rahman, M., Akira Mano, Keiko Udo, Yoshinobu Ishibashi

APPLIED GEOCHEMISTRY　26　(4)　636-647　2011/04

DOI： 10.1016/j.apgeochem.2011.01.020 　

ISSN： 0883-2927
Downscaling global weather forecast outputs using ANN for flood prediction

Do Hoai, N., Udo, K., Mano, A.

Journal of Applied Mathematics　2011　1-14　2011

DOI： 10.1155/2011/246286 　

ISSN： 1110-757X 1687-0042

eISSN： 1687-0042
FLOOD FORECASTING AND EARLY WARNING FOR RIVER BASINS IN CENTRAL VIETNAM

Do Hoai NAM, Keiko UDO, Akira MANO

Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)　67　(4)　I_7-I_12　2011
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.67.i_7 　

eISSN： 2185-467X
MODELING FLOOD RUNOFF RESPONSE TO LAND COVER CHANGE WITH RAINFALL SPATIAL DISTRIBUTION IN URBANIZED CATCHMENT

Mohammad FARID, Akira MANO, Keiko UDO

Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)　67　(4)　I_19-I_24　2011
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.67.i_19 　

eISSN： 2185-467X
QUASI-2D TRANSPORT MODEL OF SUSPENDED SEDIMENT IN A WAVE FLUME

Sabaruddin RAHMAN, Akira MANO, Keiko UDO

Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)　67　(4)　I_121-I_126　2011
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.67.i_121 　

eISSN： 2185-467X
CONSTRUCTION OF FLOOD RUNOFF MODEL UTILIZING RAINFALL FORECASTS FROM JMA

Taro KURIHARA, Keiko UDO, Akira MANO

Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)　67　(4)　I_541-I_546　2011
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/jscejhe.67.i_541 　

eISSN： 2185-467X
Development of a Quasi-2D Model on Suspended Sediment Transport in Surf Zone Peer-reviewed

S. Rahman, A. Mano, K. Udo

JOURNAL OF COASTAL RESEARCH　SI 64　1160-1164　2011

ISSN： 0749-0208

eISSN： 1551-5036
Application of Rouse's Sediment Concentration Profile to Aeolian Transport: Is the suspension system for sand transport in air the same as that in water? Peer-reviewed

K. Udo, A. Mano

JOURNAL OF COASTAL RESEARCH　SI 64　2079-2083　2011

ISSN： 0749-0208

eISSN： 1551-5036
夏季の砂浜温熱環境に及ぼす海岸砂草の影響 Peer-reviewed

有働恵子

土木学会論文集B2 (海岸工学)　66　(1)　1111-1115　2010/10
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.66.1111 　

ISSN： 1884-2399

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This study conducted field observations in terms of beach surface temperature ground cover ratio of beach grass water content and grain size of beach sand in August 2003 at an open ocean beach in Japan in order to investigate the effect of the ground cover on thermal environment at beach. The temperatures of sandy area and grass area had strong proportional relationships with solar radiation. In addition the proportional coefficient of the grass area was one-tenth of that of the sandy area indicating that beach grass was effective in moderating the thermal environment in summer. Clear effects of the water content on the thermal environment could not be observed. These results obtained from high temporospatial resolution data will contribute to beach management.
砂丘斜面上の飛砂に関する現地観測 Peer-reviewed

有働恵子, 満塩将太, Junaidi, 青木伸一, 加藤茂, 真野明

土木学会論文集B2 (海岸工学)　66　(1)　466-470　2010/10
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.66.466 　

ISSN： 1884-2399

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This study conducted field observations in terms of the number of blown sand impacts and wind velocity for two hours on 21 February 2009 at an open ocean beach in Japan in order to investigate characteristics of the aeolian sand transport flux over a sand dune slope. The Charnock constant related to wind shear on the sand bed surface calculated from the wind velocity data on the slope had a larger value over a flat. Furthermore the aeolian flux on the slope tended to be larger than that on the flat. Knowledge of the Charnock constant and the aeolian flux on the flat and slope was obtained from the field measurements which will become a great help for further investigation of the aeolian sand transport mechanisms.
広瀬川愛宕堰上流区間の浮遊土砂輸送特性 Peer-reviewed

有働恵子, 真野明

地球環境研究論文集　54　157-163　2010/08
Publisher:
Performance of a new eddy viscosity model for spilling breakers Peer-reviewed

Rahman,S, A. Mano, K. Udo

Annual Journal of Civil Engineering in the Osean, JSCE　26　315-320　2010/06
地中レーダ探査データを用いた茨城県波崎海岸の砂浜空間堆積過程の解析 Peer-reviewed

有働恵子

海洋開発論文集　26　1173-1178　2010/06
Flood runoff characteristics due to land cover change in upper Ciliwung river basin Indonesia using 2D distributed model coupled with NCF Tank Model Peer-reviewed

Farid, M, A. Mano, K. Udo

Annual Journal of Hydraulic Engineering, JSCE　54　157-162　2010/02
Development of short range flood forecast - A case study for central Vietnam Peer-reviewed

Nam, D.H, K. Udo, A. Mano

Annual Journal of Hydraulic Engineering, JSCE　54　163-168　2010/02
New Method for Estimation of Aeolian Sand Transport Rate Using Ceramic Sand Flux Sensor (UD-101) Peer-reviewed

Keiko Udo

SENSORS　9　(11)　9058-9072　2009/11

DOI： 10.3390/s91109058 　

ISSN： 1424-8220

eISSN： 1424-8220
現地海岸における飛砂量の高頻度観測 Peer-reviewed

有働恵子

海岸工学論文集　65　(1)　546-550　2009/10
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.65.546 　

ISSN： 1884-2399

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This study conducted field observations in terms of the number of wind-blown sand impacts and wind velocity in the period of 22 September - 2 December 2005 at an open ocean beach in Japan, in order to investigate variation of the wind-blown sand transport rate. Measured transport rate was calculated using the number of wind-blown sand impacts and compared to the rate estimated from the wind velocity using Bagnold's, Kawamura's, and Owen's equations. During the measurement period, the rate estimated using Owen's equation was relatively good agreement with the measured rate and the other equations overestimate the measured rate. The rate estimated using Kawamura's equation from hourly wind data obtained at off-site significantly overestimates the measured rate more than one order. Further knowledge about the actual aeolian sand transport should be accumulated in the field.
Rouse浮遊砂濃度分布式の飛砂への適用に関する研究 Peer-reviewed

有働恵子, 高橋悠, 真野明

海岸工学論文集　65　(1)　551-555　2009/10
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.65.551 　

ISSN： 1884-2399

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This study demonstrated applicability of Rouse concentration profile in suspension for fluvial sand transport to aeolian sand transport in order to investigate universal system for the sand transports in water and air and to obtain knowledge of vertical profile of aeolian sand transport flux. Comparison of the Rouse concentration profile and wind-tunnel experimental results indicated that the Rouse concentration profiles underestimated the experimental results when the mode of sand particle motion was classified into saltation by Rouse number; however, the Rouse profiles agreed with the experimental results when the mode was suspension during strong wind conditions. It is revealed that the aeolian sand is transported in suspension during strong wind events and the Rouse profile can be applied to the aeolian sand transport.
砕波段波の陸上遡上予測モデルの開発 Peer-reviewed

稲垣健志, 有働恵子, 真野明

海岸工学論文集　65　(1)　116-120　2009/10
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/kaigan.65.116 　

ISSN： 1884-2399

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For investigation of beach processes, it is necessary to consider wave-driven sand transport. Hydrodynamics in the wave run-up area should be estimated accurately in order to predict the beach processes, however, the accuracy of existing numerical models regarding moving shoreline change are insufficient for the prediction of the shear stress and the sediment transport. This study developed theoretical-based moving shoreline model using shallow water equation. The wave run-up heights obtained from numerical results of this model were approximately proportional to the values calculated from Hunt (1959) formula. This theory-based model can simulate the moving shoreline change accurately.
地中レーダ探査データを用いた茨城県波崎海岸における砂浜堆積過程の解析 Peer-reviewed

有働恵子, 柳嶋慎一, 栗山善昭, 真野明

海洋開発論文集　25　1221-1226　2009/06
Statistical Evaluation of Highly Arsenic Contaminated Groundwater in South-Western Bangladesh Peer-reviewed

Tauhid-Ur-Rahman, M, A. Mano, K. Udo, Y. Ishibashi

Journal of Applied Quantitative Methods　4　112-121　2009/04
茨城県青塚海岸の後浜変形および底質粒径変化に関する研究 Peer-reviewed

有働恵子

土木学会論文集B　65　31-45　2009/02

DOI： 10.2208/jscejb.65.31 　
Field measurements of seasonal wind-blown sand flux using high-frequency sampling instrumentation

Udo, K.

Journal of Coastal Research　56　148-152　2009
Field Measurement of Seasonal Wind-Blown Sand Flux Using High-Frequency Sampling Instrumentation Peer-reviewed

K. Udo

JOURNAL OF COASTAL RESEARCH　SI56　148-152　2009

ISSN： 0749-0208
圧電飛砂計を用いた飛砂フラックスの現地観測 Peer-reviewed

有働恵子

海岸工学論文集　55　551-555　2008/10
Publisher:
DOI： 10.2208/proce1989.55.551 　

ISSN： 0916-7897
茨城県青塚海岸における荒天時の底質粗粒化機構に関する研究 Peer-reviewed

有働恵子, 田辺博規, 真野明

海岸工学論文集　55　706-710　2008/10
Publisher:
DOI： 10.2208/proce1989.55.706 　

ISSN： 0916-7897
仙台湾南部海岸におけるヘッドランド周辺の土砂輸送解析 Peer-reviewed

三浦佑輔, 南将人, 有働恵子, 真野明

海岸工学論文集　55　571-575　2008/10
Publisher:
DOI： 10.2208/proce1989.55.571 　

ISSN： 0916-7897
取水堰が河川底生動物群集に及ぼす影響 Peer-reviewed

渡辺幸三, 白鳥喜之, 有働恵子, 真野明, 大村達夫

水工学論文集　52　1159-1164　2008/02

DOI： 10.2208/prohe.52.1159 　
飛砂の限界摩擦速度に関する現地観測 Peer-reviewed

有働恵子

海岸工学論文集　54　536-540　2007/10
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/proce1989.54.536 　

ISSN： 0916-7897

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This study conducted field observations in terms of the number of blown sand particles and wind velocity in the period of 12-16 Jan 2005 at an open ocean beach in Japan, in order to investigate effects of climate change on the threshold wind friction velocity of blown sand. The data of blown sand number and wind velocity were logged at a frequency of 1Hz and then divided into 5-minute segments to estimate the threshold wind velocity using Time Fraction Equivalence Method (TFEM). Time-series of the threshold wind velocity (estimated using the TFEM) demonstrated that the threshold corresponded with the value estimated using the Bagnold equation and increased notably during rainfall. The threshold decreased as the mean wind velocity increased.
仙台湾南部海岸における海浜変形特性 Peer-reviewed

三浦佑輔, 有働恵子, 真野明

海岸工学論文集　54　716-720　2007/10

DOI： 10.2208/proce1989.54.716 　
炭素循環を考慮したノクチルカ捕食－被食モデルの検討 Peer-reviewed

熊谷真之介, 有働恵子, 真野明

海岸工学論文集　54　991-995　2007/10
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/proce1989.54.991 　

ISSN： 0916-7897

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It is important to predict the quantitative variation ofNoctiluca and the occurrence of the red tide. The grazing relationship betweenNoctilucaand the prey is modeled by taking account of carbon budget. It presumes that one Noctiluca has to take Heterosigma akashiwo as preys in 2400cells for increase. The model is able to predict the number of Noctiluca at the peak well. Moreover the model expresses the characteristic of Noctiluca's proliferating rapidly in rising period about water temperature in March and April, and decreasing considerably in high water temperature period in May, June and July.
Experimental study of blown sand in a vegetated area Peer-reviewed

Keiko Udo, Satoshi Takewaka

JOURNAL OF COASTAL RESEARCH　23　(5)　1175-1182　2007/09

DOI： 10.2112/05-0499.1 　

ISSN： 0749-0208
Exploration of Geographic Watershed Characteristics Shaping Flow Duration Curve Peer-reviewed

Yokoo, Y, K. Udo

Annual Journal of Hydraulic Engineering, JSCE　51　373-378　2007/02
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/prohe.51.373 　

ISSN： 0916-7374

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This paper explores the effects of geographic characteristicsthe shape of a flow duration curve. We investigated the effects through flow durationcurve modeling and geographic characterizations of 14 Japanese watersheds. The suggested flow duration curve model based on hyperbolic tangent function was quite simple, easyto-understand, and highly precise. The correlation analysis between model parameters and geographic characteristics revealed (1) over-all runoff equally decreases with covering ratio of paddy field and increases with that of forest, (2) covering ratios of three different soil types and three different geologic types in this research are not satisfactory watershed descriptors, and discoveries of satisfactory descriptors of watershed's soil and geologic features must be necessary for discussions on the effects of soil and geologic features, (3) watershed geometries are not effective descriptor for the shape of flow duration curve.
Short-term Backshore Processes under Wave and Wind Actions Peer-reviewed

K. Udo, S. Yamawaki

JOURNAL OF COASTAL RESEARCH　SI 50　237-241　2007

ISSN： 0749-0208
後浜変形過程に及ぼす波の影響 Peer-reviewed

有働恵子, 栗山善昭

Proceedings of Coastal Engineering, JSCE　53　546-550　2006/10
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/proce1989.53.546 　

ISSN： 0916-7897
後浜の地形および底質粒径変化に及ぼす汀線変化の影響 Peer-reviewed

有働恵子, 山脇秀仁, 伊東啓勝

Proceedings of Coastal Engineering, JSCE　52　511-515　2005/10
Publisher:
DOI： 10.2208/proce1989.52.511 　

ISSN： 0916-7897
A wind tunnel experiment of sand transport and its comparison with the Werner model Peer-reviewed

Y Hatano, Y Kanda, K Udo, S Takewaka, R Ueki, N Hatano, H Mouri, M Chiba, K Kurihara, H Nishimura

JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE　109　(F1)　F01001　2004/01

DOI： 10.1029/2002JF000015 　

ISSN： 0148-0227
植生領域の飛砂と風場に関する実験的研究 Peer-reviewed

有働恵子, 武若聡, 西村仁嗣

海岸工学論文集　50　616-620　2003/10

DOI： 10.2208/proce1989.50.616 　
植生領域の飛砂に関する実験的研究 Peer-reviewed

有働恵子, 武若聡, 西村仁嗣

海岸工学論文集　49　636-640　2002
Publisher:
DOI： 10.2208/proce1989.49.636 　

ISSN： 0916-7897
海岸砂丘の長期的な地形変動特性とその再現 Peer-reviewed

有働恵子, 武若聡

海岸工学論文集　48　596-600　2001/10
Publisher: Japan Society of Civil Engineers
DOI： 10.2208/proce1989.48.596 　

ISSN： 0916-7897
後浜の地形変動に関する研究 Peer-reviewed

有働恵子, 武若聡

土木学会論文集　55　175-187　2001/05
Publisher:
DOI： 10.2208/jscej.2001.677_175 　

ISSN： 0289-7806
砂の飛散分布に関する実験的研究

有働恵子, 神田洋一, 武若聡, 羽田野祐子

土木学会全国大会年次学術講演会　56　(2)　552-553　2001

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Misc. 8

気候変動を踏まえた流域の土砂管理 Invited

有働恵子

電力土木　436　3-8　2025/03
気候変動を考慮した海岸地形研究における国際動向と今後の課題 Invited

2023年度（第58回）水工学に関する夏期研修会講義集　B-5　2023
気候変動を踏まえた砂浜管理 Invited

有働恵子

河川　913　6-8　2022/08
海岸における飛砂 Invited

有働恵子

ながれ　41　214-219　2022/06
気候変動と日本の砂浜 Invited

有働恵子

河川　888　24-28　2020/07
Effect of Climate Change on Beaches in Japan Invited

UDO Keiko

JAPANESE JOURNAL OF MULTIPHASE FLOW　33　(1)　28-35　2019/03
2011年津波による海浜変形・回復・復興 Invited

有働恵子

日本地震工学会会誌　27　8-12　2016
東北地方太平洋沖地震津波による仙台湾南部海岸の侵食とその回復過程 Invited

有働恵子

水環境学会誌　36　(2)　40-43　2013
Publisher: 水環境学会

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Books and Other Publications 9

水理公式集例題集（2024年版）

水工学委員会水理公式集例題集編集小委員会　2024/12
東日本大震災からのスタート: 災害を考える51のアプローチ

東北大学災害科学国際研究所編　2021
The 2011 Japan Earthquake and Tsunami: Reconstruction and Restoration

V. C. Hoang, H. Tanaka, Y. Mitobe, K. Udo, A. Mano

Springer International Publishing　2017
Characteristics of shoreline retreat due to the 2011 Tohoku Earthquake and Tsunami and its recovery after three years

Keiko Udo, Kaoru Tojo, Yuriko Takeda, Hitoshi Tanaka, Akira Mano

2016

ISBN: 9783319285269
Post-Tsunami Hazard

Udo, K, M. Takamura, Y. Takeda, A. Mano

2015
Tsunami Events and Lessons Learned

T, A. Mano, K. Udo, H. Tanaka

Environmental and Societal Significance　2014
東日本大震災合同調査報告共通編２津波の特性と被害

後藤和久, 有働恵子, 菅原大助

東日本大震災合同調査報告書編集委員会編　2013
東日本大震災に関する東北支部学術合同調査委員会報告書

有働恵子

東日本大震災に関する東北支部学術合同調査委員会編　2013
東日本大震災を分析する

真野明, 有働恵子, 田中仁

明石書店　2013

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Presentations 25

明日の土木分野を語る Invited

有働恵子

土木学会東北支部土木の日記念行事令和5年度防災に関するシンポジウム　2024/01/11
IT技術はこれからの50年をどのように変えていくのか～流行語＠IT技術の変遷から未来を予測する～ Invited

有働恵子

創基151年筑波大学開学50周年記念イベント　2023/10/01
気候変動を考慮した海岸地形研究における国際動向と今後の課題 Invited

有働恵子

第58回水工学に関する夏期研修会（土木学会）　2023/09/01
Development of economic evaluation framework for adaptation to future beach loss Invited

Keiko Udo

2023/07/18
気候変動と砂浜 Invited

有働恵子

第２６回海岸シンポジウム「気候変動により消えゆく白砂青松～2100 年の日本の砂浜はいかに～」　2022/12/01
Development of economic evaluation framework for aptation to future beach loss Invited

Keiko Udo

3rd JSCE- CCES JOINT SYMPOSIUM OF CIVIL ENGINEERING　2021/10/21
全国の砂浜消失将来予測と適応策 Invited

有働恵子

第36回沿岸環境関連学会連絡協議会ジョイントシンポジウム「沿岸分野の各学会における気候変動対応：学会間のトレードオフとシナジー効果を明らかにする」　2020/01/11
Sediment Balance from Mountains to Coasts in Japan: Huge Impact of Past River Mining Invited

Keiko Udo

Asia Oceania Geosciences Society Annual Meeting 2019　2019/07/29
気候変動と生物多様性：砂浜における多様な価値の評価に向けて Invited

有働恵子

第112回日港連セミナー　2024/10/21
環境・利用にも配慮した海岸空間の創造に向けて Invited

有働恵子

アルファ水工特別講演会　2024/07/26
流砂系の土砂動態を考慮した砂浜変化予測に向けて Invited

有働恵子

令和4年度海岸工学特別講演会（港湾空港技術研究所）　2023/01/26
効果的な海岸堤防の在り方

有働恵子

仙台防災未来フォーラム東日本大震災メモリアルシンポジウム2022（東北大学災害科学国際研究所）　2022/03/05
海面上昇と経済評価 Invited

有働恵子

土木学会海岸工学委員会沿岸域における気候変動適応策に関する研究会　2021/09/24
海面上昇による砂浜消失への適応策の検討事例 Invited

有働恵子

沖ノ鳥島・小島嶼国研究会　2021/06/11
Development of economic evaliation framework for adaptation to future beach loss Invited

Keiko Udo

Civil Engineering Conference in the Asian Region 8　2019/04
砂浜の砂はどう動く？－砂浜計測技術の最先端－ Invited

有働恵子

（社）日本水環境学会東北支部第9回水ものがたり研究会　2019/03/27
気候変動に伴う海面上昇による全国の砂浜消失将来予測とその不確実性評価 Invited

有働恵子

特別海洋工学パネルJAMSTEC中西賞受賞記念講演会　2019/03/11
消えゆく砂浜～砂浜の未来について考える～ Invited

有働恵子

一般社団法人日本女性科学者の会平成31年新春学術シンポジウム　2019/01/12
Past and future beach erosion in Japan Invited

Keiko Udo

2017/11/07
Past and future beach erosion in Japan Invited

Keiko Udo

2017/07/03

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Past and future beach erosion in Japan
砂浜消失に着目した気候変動影響評価・適応策研究の今後 Invited

有働恵子

平成28年度土木学会全国大会，研究討論会06，気候変動への適応研究推進に向けて！　2016/09/07

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砂浜消失に着⽬した気候変動影響評価・適応策研究の今後に関する講演
将来の砂浜消失予測と適応策 Invited

有働恵子

第60回水工学講演会アゲールシンポジウム　2016/03/14
海浜変形予測とその問題点 Invited

有働恵子

第61回海岸工学講演会　2014/11/11
東北地方太平洋沖地震津波による仙台湾南部海岸の侵食とその回復 Invited

有働恵子

水環境学会東北支部講演会　2013/05/30
Backshore processes under wave and wind actions Invited

Keiko Udo

2007/09/05

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Research Projects 23

山地から海岸までの土砂動態および流域地形に及ぼす気候変動の中長期的な影響評価技術の開発と適応策の提案

有働恵子,内田太郎,梅田信,横尾善之,三戸部佑太,Janaka Bamunawala

Offer Organization: 環境省

System: 環境研究総合推進費

Category: 令和7年度環境問題対応型研究（一般課題）

2025/04 - 2028/03
Nature-based Solutionとしての海岸砂丘活用を見据えた砂丘-砂浜長期地形変化予測モデルの開発

有働恵子

Offer Organization: 一般財団法人日本国土開発未来研究財団

System: 2024年度学術研究助成

2024/10 - 2027/09
Impact of large-scale flood events on ocean circulation

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Transformative Research Areas (A)

Institution: The University of Tokyo

2022/06/16 - 2027/03/31
ダムの堆砂対策に関する研究

有働恵子,梅田信

Offer Organization: 東北電力株式会社

2021/10 - 2025/03
気候変動への適応に向けた砂浜価値の定量化に関する研究

有働恵子

System: 一般財団法人国土技術研究センター研究開発助成

2022/04 - 2024/03
Economic impact of typhoon disasters on coastal cities

Keiko Udo, Zhang Yi

System: Tohoku University-Tsinghua University Collaborative Research Fund

2021/04 - 2023/03
Development of a stochastic shoreline change model considering changes in sediment supply from rivers to the coast due to climate change

Udo Keiko

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

2018/04/01 - 2022/03/31

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Sandy beaches are deformed under the influence of changes in sediment supply from mountainous areas, through rivers, to the coast, in addition to coastal and offshore drift and blown sand parallel and perpendicular to the coastline. In particular, the sediment supply from rivers is known to have a significant impact on coastal sediment transport. For effective coastal management to adapt future climate change, it is essential to integrate these models and develop a long-term shoreline change model considering the sediment supply. In this study, each of these sediment dynamics models was constructed and incorporated into a shoreline change model to develop a future long-term prediction model capable of estimating shoreline, berm, and dune locations.
タイ国における統合的な気候変動適応戦略の共創推進に関する研究（タイ王国）

Offer Organization: 科学技術振興機構

System: JST-JICA地球規模課題対応国際科学技術協力プログラムSATREPS，環境・エネルギー研究分野「地球規模の環境課題の解決に資する研究」

Institution: 東京大学

2015/07 - 2021/03

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超学術研究により観測・予測技術を水災害リスク管理に生かす気候変動の進展に伴い、2011年のタイ・チャオプラヤ川における大洪水のような水災害の頻度上昇などが懸念されている。そうしたリスク軽減のため、現地観測や衛星からの地球観測と数値シミュレーション技術を組み合わせた早期警戒情報の提供や、適切な土地利用への誘導、貯水池操作規則の変更など様々な施策を上手に組み合わせ、社会全体の利益を最大化できる適応戦略を政府や市民などと対話を通じて構築する。適切な適応策の構築と実現に貢献し、近隣諸国への波及にも期待が統合的な適応策に資する技術開発および適応戦略共創の手法開発、優良事例の実現、適応分野の人材育成を通じ、タイ国における気候変動適応策の円滑な構築と実現に貢献する。さらに近隣の東南アジア諸国でも適用可能な、気候変動に対する強靭かつ持続可能な解決策を提示する。
Conversion from Great East Japan Earthquake archive to natural disaster archive

shibayama akihiro

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 - 2020/03/31

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Concerning the transition Great East Japan Earthquake Digital Archive” to the “Disaster Digital Archive,” this research analyzed and tested methods to organize and classify various records of natural hazard induced disasters such as storms and floods; developed metadata schemas to deal with general natural hazard induced disasters, and clarified techniques for automatic classification, categorization and organization of large quantities of materials on natural hazards. Moreover, a pilot system for the Disaster Digital Archive has been built, a user interface to enhance efficient search on disaster-related content and a system for an improved automatic categorization of data on natural hazard induced disasters have been created.
気候変動影響評価等技術の開発

System: 文部科学省気候変動適応技術社会実装プログラム

2015/11 - 2020/03
気候変動による高速道路の災害リスク評価

有働恵子

System: 株式会社ネクスコエンジニアリング東北

2017/04 - 2019/03
Mechanism of aeolian sand transport in turbulent field over coastal dunes(Fostering Joint International Research)

Udo Keiko

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Fund for the Promotion of Joint International Research (Fostering Joint International Research)

Institution: Tohoku University

2016/04 - 2019

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An international research group on study of beach-dune morphology was established with Professor Ranasinghe of IHE Delft in the Netherlands. For effective collaborative research, we decided that the principal investigator joined to the Professor Ranasinghe's Chair and Associate Professor Dastgeib visits the principal investigator's laboratory regularly. It is a great achievement to develop the active international research base. With this research base, sufficient research results on coastal sandy beach-dune system such as sediment supply from rivers to coast, long-term shoreline change and wind field around coastal sand dune were published in multiple international journals.
直線状海岸砂丘上における風場特性に関する研究

有働恵子

System: 国立大学法人九州大学応用力学研究所平成29年度共同利用研究

2017/04 - 2018/03
Erosion mechanism by the 2011 tsunami and the effective countermeasure

MANO Akira

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

2014/04/01 - 2017/03/31

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Destructive and wide spanning erosions by tsunamis and storm surge often obstruction for rebuild. The reconstruction requires breaking mechanism to build robust structures. This study accounts two measure mechanisms, bottom shear stress and liquefaction, and find robust structures.
ボリビア・アマゾンにおける将来の気候変動と人為活動が洪水リスクに与える影響評価

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

2014/04 - 2017/03

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The flood models were improved by using high resolution digital elevation models (DEM). Thus, the model were able to simulate with more detail the flood patterns, especially in urban areas. The flood simulation models were updated in order to cover more area. The area influenced by the Jirau dam covering territories of Brazil and Boliva was included. Thus, the research will analyse transboundary waters and transboundary floods. Besides, the research analyse the flood contribution of big economic development projects such as hydropower dams (The Jirau dam). The analysis of the climate change scenarios was improved by including more climate change scenarios.
Wind turbulence effects on sand transport

Udo Keiko

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2013/04/01 - 2016/03/31

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This study investigated wind turbulence effects on dune sand transport through field experiment of three dimensional wind velocity and aeolian sand flux. Horizontal turbulence intensity has a negative relationship with mean horizontal wind velocity and also with the aeolian sand flux in various wind conditions. The spatial wind field during the experiment was simulated with large eddy simulation (LES) and the results show wind characteristics reasonably consistent with measured ground elevation change. However, the results also demonstrate that accurate simulation of vertical wind velocity and both horizontal and vertical turbulence intensity in the field is a great challenge compared to simulation of horizontal velocity.
Environmental changes and its improvement along the Porong River due to discharging sediment from a mud volcano

TANAKA Hitoshi, MANO Akira, UDO Keiko, UMEDA Makoto, KURE Shuichi, MITOBE Yuta

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

2012/04/01 - 2015/03/31

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On May 29, 2006, mud and gases began erupting unexpectedly from a hydrocarbon exploration well near Sidoarjo, East Java, Indonesia. The mud is being pumped into the Porong River, which then carries the mud to the ocean approximately 20 km to the east. The main objective of this study is to assess (1) the effect of mudflow on the river and estuary environment such as sediment deposition and water quality using the observed river cross sections and bathymetry data, (2) application of numerical models to the Poring River, and (3) propose most suitable countermeasure which causes minimum environmental impact.
全国の沿岸侵食リスクの推定とリスクマップの開発

有働恵子

System: 環境省環境研究総合推進費平成22年度戦略的研究開発領域課題S-8

2010/04 - 2014/03
Building of beach-dune dynamics based on field measurements of sand transport using state-of-the-art instruments

UDO Keiko

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Young Scientists (B)

Institution: Tohoku University

2011/04 - 2012/03

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This study investigated characteristics of instantaneous wind velocities and angle and aeolian sand flux over different scale coastal dunes in order to clarify a relationship between wind and sand flux over complex terrain of dunes.
Development of Quasi 3D sediment transport model in wave breaker and swash zone and proposal of effective sediment transport control

MANO Akira, TANAKA Hitoshi, UDO Keiko

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 - 2012/03

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Vertical profile of eddy viscosity is modeled in wave breaking and swash zones. It enabled to get vertical profile of suspended sediment. Quasi-3D sediment transport model coupled with the higher order Boussinesq model was developed. Bypass sediment flux around headlands was observed at the Yamamoto coast, the prediction model of which was developed. It is shown the bypass flux is effectively controlled by adjusting the length of the head.
Collaboration research on contemporary wave- and wind-induced beach processes in Japan and UK, examining post-storm beach recovery mechanisms with predicted rises in sea levels and increased storm intensities from climate change

Keiko Udo, Derek Jackson

2008/06 - 2009/03
土砂輸送量に及ぼす砂―流体の密度比の影響

有働恵子

System: 前田記念工学振興財団研究助成

2007/04 - 2008/03
荒天イベントに着目した後浜変形長期予測モデルの開発

有働恵子

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: 独立行政法人港湾空港技術研究所

2004/04 - 2005/03

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本研究は,荒天イベントに伴う地形変化に着目し,気象シナリオに対する20年程度の長期的な後浜変形を高精度で予測する後浜変形長期予測モデルの開発を試みた.茨城県鹿島灘に面する波崎海岸における後浜地形および波浪の約10年間の長期データを解析することにより,荒天イベントに伴う年に数回の波の遡上が,通年作用する風と比較して後浜長期変形に多大な影響を及ぼすことが明らかとなった.波崎海岸では長期的に後浜域が海側へ拡大する傾向にあり,長周期波に起因する漂砂がこの不可逆的な堆砂現象の支配的要因となっていた.以上の結果を考慮して長周期波の波高を変数とし,堆砂領域における漂砂モデルを構築したところ,堆砂現象を概ね良好に再現していた.風により発生する飛砂については,常時観測システムにより得られたデータを解析することにより,平均風速が大きくなるにつれて限界摩擦速度は小さくなることを明らかにした.飛砂の限界摩擦速度の変化特性および海岸植生の飛砂抑制効果を考慮した飛砂モデルを構築した.本研究では,当初目的としていた後浜変形長期予測モデルの開発,すなわち,漂砂および飛砂モデルの統合とそのモデルの検証には至らなかったものの,データ解析の過程で学術的意義の高い様々な知見を蓄積し,長期予測モデルの構築に必要とされる漂砂および飛砂モデルをそれぞれ構築した.これまで後浜に関する研究では,その変形要因を飛砂に限定して研究が行われる場合が多かったが,本研究で明らかにした後浜変形への漂砂の影響は,地形学的にも海岸工学的にも極めて有益な知見を提供する.

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Teaching Experience 7

Flow and Wave Modelling and Numerical Solution　Tohoku University
Numerical Analysis　Tohoku University
地球環境学　東北大学
社会環境工学実験　東北大学
災害の科学　東北大学
水理学A及び同演習　東北大学
水環境デザイン演習　東北大学

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Social Activities 6

海岸保全計画（防潮堤など）に関する検討会

2013/07 - 2014/12
気候変動の影響と適応に向けて（砂浜）

気候変動に対する適応を考えるシンポジウム −阿武隈川のこれからを考える意見交換会−

2018/07/13 -
女性のための防災リーダー養成講座

2016/11/19 -

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日本における水害のこれまでとこれからに関する講演
ネクストリーダー養成塾「私の経歴振り返り～今の自分はどう作られたのか～」

2015/08/08 -

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私の経歴ふりかえり～今の自分はどう作られたのか？～
消えゆく砂浜～砂浜の未来について考える～

サイエンスカフェ

2014/12/19 -
気仙沼市防潮堤を勉強する会

2012/09/14 -

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「砂浜地形変化メカニズムと防潮堤の影響」

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Media Coverage 31

夏のレジャー、海水浴は少数派

日本経済新聞　https://www.nikkei.com/article/DGXZQOUC072JC0X00C25A7000000/

2025/08/04

Type: Newspaper, magazine
里海からの警告第３部陸域の恵み（６）痩せる浜辺ダムや護岸整備が影響

山陽新聞　朝刊22頁

2023/04/30

Type: Newspaper, magazine
未来宣告クイズTHE COUNTDOWN

日本テレビ

2022/12/10

Type: TV or radio program
（１．５℃の約束）ニュースドリル

朝日新聞　朝刊27頁（東京本社）

2022/11/10

Type: Newspaper, magazine
Loss of storied beach offers cautionary tale for rest of world

The Asahi Shimbun　National Report

2022/11/10

Type: Newspaper, magazine
（１．５℃の約束）海岸浸食、暮らし脅かす――川からの土砂供給減も影響

朝日新聞　朝刊2頁２総合（東京本社）

2022/08/17

Type: Newspaper, magazine
ＮＨＫスペシャル２０３０未来への分岐点（１）暴走する温暖化脱炭素への挑戦

NHK　https://www2.nhk.or.jp/archives/movies/?id=D0002190002_00000

2021/01/09

Type: TV or radio program
細る海岸

朝日新聞　夕刊1頁（東京本社）

2020/10/19

Type: Newspaper, magazine
‘Dude, where’s my sand?’ Japan’s beaches are disappearing

Asahi.com

2019/08/13

Type: Internet
消える砂浜、対症療法は限界変化予測し先手の対策を

朝日新聞　夕刊4頁環境（東京本社）

2019/07/18

Type: Newspaper, magazine
Why Japan's Coastal Zones might be Disappearing due to Climate Chang -Projections of Future Beach Loss in Japan Due to Sea-Level Rise and Uncertainties in Projected Beach Loss

World Scientific Publishing Co Pte Ltd

2017/07/03

Type: Internet
消えゆく砂浜

2014/08/11

Type: TV or radio program

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消えゆく砂浜
NHK おはよう日本

2014/02/01

Type: TV or radio program

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海面上昇で最大9割の砂浜消失か
“激甚化”する自然災害損害保険会社は採算割れも

朝日新聞出版社　週刊朝日　102頁

2023/02/07

Type: Newspaper, magazine
サザン名曲の稲村ガ崎、無残な光景に名前どころか砂も消した温暖化

朝日新聞デジタル

2022/08

Type: Internet
今そこにある「美しく、いきいきとした海岸」を次世代へ Myself

建設通信新聞社

2021/10/29

Type: Newspaper, magazine
地球HEROES～楽しく地球を救っちゃおう！！

フジテレビ

2021/03/07

Type: TV or radio program
日曜特番千里浜の「病状」は

北國新聞

2021/03/07

Type: Newspaper, magazine
車が走れる海岸消滅の危機

朝日新聞　朝刊25頁（富山全県）

2020/11/05

Type: Newspaper, magazine
千里浜海岸消滅の危機

朝日新聞　朝刊21頁（石川全県）

2020/10/29

Type: Newspaper, magazine
千里浜海岸危機

朝日新聞　夕刊1頁（大阪本社）

2020/10/16

Type: Newspaper, magazine
COP24 閉幕 “待ったなし”の地球温暖化対策

BS-TBS

2018/12/18

Type: TV or radio program
千葉の砂浜、今世紀末に大半消える？

日本経済新聞　https://www.nikkei.com/article/DGXMZO29273400R10C18A4L71000/

2018/04/11

Type: Internet
富山の砂浜消滅の危機!? ～近い将来富山から消える!?モノ～

富山テレビみんなのニュースBBTチャンネル8　https://www.youtube.com/watch?v=Q2wiFEnvc7k&list=PLMXlbKG8KT1PZl0qqEiGV4GRjC7AKn5Xi&index=52

2017/01/27

Type: TV or radio program
日本の砂浜が消えていく

隔月刊地球温暖化 9月号

2016/09

Type: Newspaper, magazine
どうなる？未来の砂浜

2016/04

Type: Other
これからの沿岸防災・減災

ライフ・スペシャリティマガジンASPARA

2015/07

Type: Newspaper, magazine
震災データ解析急ぐ

河北新報

2015/06/05

Type: Newspaper, magazine
役割踏まえた議論必要／消えゆく砂浜、どう対応？

河北新報

2015/01/07

Type: Newspaper, magazine
特別寄稿変化し続ける3万5千kmの海岸線を守る

ライフ・スペシャリティマガジンASPARA

2015/01

Type: Newspaper, magazine
いのちと地域を守る防災・減災のページ：「探る」深刻さ増す海岸侵食

河北新報　朝刊14頁

2012/11/11

Type: Newspaper, magazine

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