Numerical simulation of coastal inundation over discontinuous topography

Abstract

A new moving boundary technique for leap-frog finite difference numerical model is proposed for the resonable simulation of coastal inundation over discontinuous topography. The new scheme improves the moving boundary technique developed by Imamura(1996). The present scheme is tested using the analytical solution of Thacker (1981) for the case of free oscilation with moving boundary in a parabolic bowl. Finally, a numerical simulation is conducted for the flooding over a tidal barrier constructed on a concave geometry. A geral feature of inundation over a discontinuous topography is well described by the numerical model.