2020 Fiscal Year Final Research Report
Computational approach for river channel processes with bank erosion
| Project/Area Number |
18K04367
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 22040:Hydroengineering-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Keywords | 流路変動 / 数値モデル |
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| Outline of Final Research Achievements |
River channel processes with bank erosion recently occur during floods. For disaster mitigation, it is of great importance to predict the flow fields and bed deformation accurately by computational model. In this study, numerical model to simulate river channel processes with bank erosion is proposed, by coupling the 3D flow model which solves simultaneously overtopping and seepage flows and the equilibrium sediment transport model. Then, the verification of numerical model is carried out through comparison with the hydraulic experiments.
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| Free Research Field |
水工学
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| Academic Significance and Societal Importance of the Research Achievements |
近年，災害リスクが高くなってきている中，洪水流の非定常的な挙動と地形変化を予測することは河川工学的に重要な課題である．本研究では，河岸侵食を伴う蛇行流路形成過程を対象とし，水理模型実験によって流路変動プロセスを明らかするとともに，表面流と浸透流を同時に予測できるデカルト座標系での３次元流体解析モデルと土砂輸送モデルを組み合わせ，水際・河床近傍の複雑な流れの３次元性と土砂輸送特性を考慮した数値モデルの構築を行った．本研究は適切な河道管理に向けた予測モデルの高度化に大きく貢献すると考えられる．
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