PROPOSAL OF FLOOD INUNDATION RISK MAP REFLECTING SPATIAL DISTRIBUTION OF INUNDATION PROBABILITY

Abstract

 In this study the flood inundation risk map was proposed as a new risk evaluation method reflecting spatial distribution of inundation probability. At first many scenarios were supposed to reflect various probabilistic uncertainty about broken point of the embankment and its degree. Then numerical simulations of flood inundation based on the scenarios were carried out. The maximum inundation depth map and the inundation probability map were created from the results of all scenarios. Finally the flood inundation risk map was developed by shading the maximum inundation depth map according to the inundation probability.