A projection method-based model for dam- and dyke-break flows using an unstructured finite-volume technique: Applications to the Malpasset dam break (France) and to the flood diversion in the Red River Basin (Vietnam)

A numerical model is presented for simulating darn-break flows and flood diversions. The model is based on a projection method, which consists of combining the momentum and continuity equations to establish a Poisson-type equation for the water surface level. The computed domain is discretized by finite volumes On an unstructured grid. A second-order upwind scheme Coupled with a least-square technique is used for handling advection terms. The accuracy, stability and reliability of the present model are verified by comparing numerical results with observed data for the Malpasset dam-break event. An application of flood diversion in Red River Basin is also reported. Copyright (c) 2008 John Wiley & Sons, Ltd.