Abstract
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 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.
