Abstract
Dike failures due to overtopping flows recently occur in flood events. It is of great importance to understand mechanism of dike failure processes and predict dike erosion accurately. In this study, numerical simulation of dike breaching is carried out using a three-dimensional flow model in porous media and density function methods and a non-equilibrium sediment transport model. Infiltration into a dike is also considered in the simulation. Firstly, a numerical model is applied to flows over a solid embankment in order to validate flow model. Then, dike erosion processes are simulated. Comparing with the previous experimental results, the numerical model can reproduce overflows and dike failure processes reasonably.
