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Volp, N.D. (author), Van Prooijen, B.C. (author), Stelling, G.S. (author)This study presents a finite volume hydrodynamic model for shallow water flow that computes on a coarse grid, but accounts for high-resolution bathymetry and roughness variations on a subgrid. The detailed information can be incorporated by using the assumption of a uniform flow direction and a uniform friction slope within a part of a coarse...journal article 2013