Numerical Simulation and Experiment on Tsunami Run-Up

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Abstract
Numerical simulations were carried out on tsunami run-up on a coastline where a sand dune or a coastal structure exists. The numerical model is based on the nonlinear shallow-water equations, and the fundamental equations are solved by a finite difference method. Through comparisons of temporal and spatial distributions of the water level and horizontal velocity with experimental data, it was found that the simple model used in this study can simulate tsunami behavior with enough accuracy for practical use except near a dune or a structure. A permeable detached breakwater often constructed in Japan can be modelled by a bed level change in one grid, if the drag coefficient is properly given.

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