Abstract
The flood damage mitigation effects of flood protection forest against inundation flows due to dyke breach as well as the breach discharge by overtopping flows are investigated. The process of breach erosion is reproduced, employing laboratory-scale non-cohesive homogeneous embankments. It is found from laboratory experiments and numerical analysis that dyke breach flows are diverted and diffused by the forest, so that hydrodynamic forces acting on houses located 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.
