A high-resolution finite volume hydrodynamic solver for hydraulic flows has been developed. Second order accuracy has been achieved by means of MUSCL reconstruction in conjunction with a Hancock two-stage scheme for the time integration. This Godunov-type upwind scheme using approximate Riemann solvers is capable of capturing bore-waves. Because of this ability, both tidal flows and wave propagation can be simulated accurately. Wave-driven sediment movements can be simulated together with tide-driven transport without the need to evaluate the radiation stresses. By using the finite volume method, the computational grid can be irregular which allows easy boundary fitting. The orthogonal or conformal grids are not strictly necessary and grids can even be obtained by digital hand-drawing using a screen pen. The mathematical formulation and procedures of the numerical schemes are presented in this paper. Some results of validation and application are also given.
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