Abstract
The flood damage mitigation effects of flood protection forest against inundation flows, due to dyke breach, were investigated experimentally and numerically. It is found experimentally that dyke breach flows are diverted and diffused by the forest, so that the velocities and hydrodynamic forces of the flows behind the forest are substantially reduced. It is also demonstrated that the dynamic inundation model, which comprises the finite volume method on unstructured grid using FDS technique, is capable of predicting such effects of the forest against the flows with good to reasonable accuracy. Numerical experiments were also carried out to reveal the effects of arrangement of the forest on the flows and houses.
