Hydrostatic relaxation scheme for the 1D shallow water - Exner equations in bedload transport

摘要

This paper describes the numerical scheme of the one-dimensional Exner - shallow water equations for sediment modeling. Here, our novel numerical scheme is called hydrostatic relaxation scheme which is a robust and straightforward scheme. This scheme is given as the hydrostatic reconstruction of the relaxation solver. Some numerical tests are presented such as analytical solution, transcritical flow over a granular bump, and erodible bottom due to dam-break. The comparisons of numerical and data experiments are also given in dam-break over granular bed simulation. The results of our simulation have a good agreement with analytical solution and the data experiments. Moreover, satisfactory convergence rate in L-1-norm is obtained. (C) 2015 Elsevier Ltd. All rights reserved.