The Influence of Bed Friction on Long Wave Run-up

Haifei Liu, Jie Zhang, Yanwei Zhao, Minghui Yu


The influence of bed friction on long wave run-up is investigated in this study using a lattice Boltzmann model for the one-dimensional (1D) shallow water equations. In order to appropriately simulate the wetting and drying boundary, the lattice Boltzmann approach which contains bed friction directly is adopted. A 1D tidal wave over three different bed slopes is used to test the water surface changes in varying bed friction coefficient. The result implies that the bigger bed friction, the lower wave run-up or run-down speed.


lattice Boltzmann model; bed friction; long wave run-up; wetting and drying boundary

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