A two-dimensional numerical model for uraban flooding is developed. The model is based on a numerical model with Finite volume method on Unstrucuted grid using Flux-difference splitting technique for 2D Flood flows (FUF-2DF model). The treatments of complicated flood plain geometries with sumberged/emerged topgraphy, stuructures, road networks, flood retarding plantation etc. are incorporated into the model. In experiment, flow depths, velocities and hydrodynamic forces acting on structers in

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... ood plain with complicated geometries were observed. The model is verified comprehensively against the experimental data, and it shows that the model can reproduce the complex behavior of the flow and hydrodynamic forces with reasonable accuracy.