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2023 Fiscal Year Final Research Report

Risk analysis of wadi flash flood considering climate change and development of early warning system

Research Project

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Project/Area Number 20KK0094
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 22:Civil engineering and related fields
Research InstitutionKyoto University

Principal Investigator

Sumi Tetsuya  京都大学, 防災研究所, 教授 (40311732)

Co-Investigator(Kenkyū-buntansha) カントウシュ サメ・アハメド  京都大学, 防災研究所, 教授 (70750800)
小柴 孝太  京都大学, 防災研究所, 助教 (80883157)
佐藤 嘉展  愛媛大学, 農学研究科, 准教授 (90414036)
Project Period (FY) 2020-10-27 – 2024-03-31
Keywords洪水 / ワジ / フラッシュフラッド / 気候変動 / 早期警戒システム
Outline of Final Research Achievements

In collaboration with Sultan Qaboos University in Oman, we conducted an international joint research study on the following topics, where flash floods have been increasing in wadi systems in recent years. 1) Improving the reproduction accuracy of flash flood rainfall runoff phenomena in wadis, 2) Quantifying the increasing trend of extreme events and predicting the future based on climate change scenarios, 3) Monitoring rainfall-flood runoff-sediment transport in the upper reaches of wadis 4) Development of a real-time early warning system for flood damage reduction using monitoring data. As a result, we succeeded in clarifying the flood flow of flash floods and the characteristics of river bed changes before and after floods, and laid the foundation for the development of a flood early warning system.

Free Research Field

水工学

Academic Significance and Societal Importance of the Research Achievements

本研究は,従来,モニタリングデータが非常に限られていた乾燥地のワジ流域において,ドローンやWEBカメラ,土砂流下を検知するインパクトセンサーなどを駆使した先進的なモニタリング手法を複数組み合わせて,フラッシュフラッドの水理および土砂生産特性を明らかにしようとしたものである.数少ないフラッシュフラッドの発生をこれら観測手段で捉えることに成功し,学術的にも貴重な現地データを取得した.また得られた成果は,フラッシュフラッドの降雨-流出ー土砂流出の現象解明に寄与するともに,オマーンを含めた同様な地域のワジ流域の今後の持続可能な管理と防災対策の向上に寄与することが期待される.

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Published: 2025-01-30  

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