Bulevar kralja Aleksandra 73 11000 Belgrade) 4 正会員 博(工) 北海道大学大学院准教授 工学研究院環境フィールド工学部門 (〒060-8628 札幌市北区北13条西8丁目) Levee breach due to overtopping flows recently occurs in flood events. It is of great importance to understand mechanism of dike failure and predict flows and sediment transport during its process accurately. In this study, numerical simulation of levee breach is carried out using a three-dimensional flow model in porous media and density function methods and a non-equilibrium sediment

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... transport model. A simplified bank erosion model is also incorporated in the simulation. A numerical model is applied to levee breach in the small scale hydraulic experiment. Comparing with the previous experimental results, it is shown that the numerical model can reproduce widening process of bank failure reasonably.