Abstract
A numerical model based on Spatial Averaged Finite volume method on Unstructured grid using FDS technique for 2D Flood flows (SA-FUF-2DF model) was constructed to estimate flood control functions of flood retarding plantations. In experiments, front positions, depths and surface velocities of flood flows in flood plain with structures and flood retarding plantations as well as hydrodynamic forces acting on structures were observed. A SA-FUF-2DF model was verified against these experimental data, and flood simulations in a proto-scale urban area was also carried out. The model can reproduce the complex behavior of flood flows as well as hydrodynamic forces with reasonable accuracy. The flood simulations show that flood retarding plantations are effective in reducing flow discharge into urban area and hydrodynamic forces.
