This talk presents the development of a general wave-current-sediment interaction model, SRH-Coast; it features new improvements over the existing models. SRH-Coast adopts the one-model one-mesh approach in order to improve the existing methods. One mesh is used for flow/current, wave and sediment solvers; the three solvers are coupled tightly. The adopted method makes the simulation easier and more efficient to run. The current solve is based on the existing SRH-2D, the wave model follows the approach of SWAN by solving the multi-frequency, multi-direction wave action balance equation, and the sediment solver solves the non-uniform non-equilibrium approach. Detailed governing equations and the numerical methods will be presented. Model is verified and validated using several laboratory cases: good match of the model predictions and the measured data is obtained.
