Abstract
A two-dimensional numerical model, which is particularly designed for simulating the flow of a steep river with complicated geometry and hydraulic structures, is developed. The model is based on finitevolume method with unstructured grid and flux-difference splitting. Firstly, the model is verified against the existing experimetal data of the supercritical flow in converging channel and sub-/super-critical flow with hydraulic jump in diverging channel. Secondly, the model is applied to a steep urban river, and the dangerous zones of inundation from the river are specified. It shows that the numerical simulations by the model are useful in the examination of flood control functions of the urban river with steep slope.
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