2023 Fiscal Year Final Research Report
Research on water-related disaster mitigation and environment symbiosis technology in rural Bangladesh
| Project/Area Number |
19KK0118
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| Research Category |
Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 25:Social systems engineering, safety engineering, disaster prevention engineering, and related fields
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| Research Institution | Kyoto University |
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Principal Investigator |
Kawaike Kenji 京都大学, 防災研究所, 教授 (10346934)
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| Co-Investigator(Kenkyū-buntansha) |
中川 一 京都大学, 防災研究所, 教授 (80144393)
藤原 拓 京都大学, 工学研究科, 教授 (10314981)
張 浩 熊本大学, 大学院先端科学研究部(工), 教授 (90452325)
橋本 雅和 関西大学, 環境都市工学部, 准教授 (80814649)
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| Project Period (FY) |
2019-10-07 – 2024-03-31
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| Keywords | 洪水災害 / 河岸侵食 / 水制工 / バンダル / 水質汚濁 |
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| Outline of Final Research Achievements |
Improvement of Bandal-like structures has been considered as countermeasures against river bank erosion. As a result, assimilation with Seigyu-structure, Japan’s traditional groin methodology, is proposed, and fundamental hydraulic experiments have been implemented on morphology around the structures and their adaptation to the surrounding environment. In addition, the effectiveness of Vane works as well as group piles ever proposed has been discussed. Three-dimensional numerical model was developed to consider the riverbed deformation and river bank erosion along meandering channels, and reasonable results were obtained about optimal installation pattern of the groins and reproduction of river bank erosion phenomena.
Furthermore, in the downstream area of the Meguna River, the estimated affected areas of pollutant material due to inundation of industrial areas were visualized, and the effects of underground infiltration on the pollutant material propagation was evaluated.
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| Free Research Field |
防災水工学
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| Academic Significance and Societal Importance of the Research Achievements |
バングラデシュをはじめとするベンガル地域で長年用いられてきたバンダル型水制に対して、洪水流への耐性を考慮して聖牛と融合した構造を提案することで、現地でのバンダル型水制の機能向上が期待でき、今後の水制の機能に関して新たな学術的知見が得られた。また、河床変動・側岸侵食に関する3次元解析モデルを構築したことで、水制の設置による河床地形の応答特性や、洪水流による側岸侵食の抑制効果を検討することが可能になった。産業地域の浸水による汚染物質の拡散は世界各地で発生しているものの研究事例は少なく、その拡散地域を予測して可視化する手法を提案したことは学術的にも社会的にも大きな意義を持つと考えられる。
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