EVALUATION OF RIVERINE FLOOD RISK REDUCTION BY SCENARIO-BASE ANALYSIS FOR RESPONSE OF FLOOD PREVENTION SYSTEM TO WIDE-SCALE FLOODS

Abstract

We proposed an evaluation method for examining riverine flood damage reduction measures using the risk analysis framework. With this method, we can list up a set of potential flood damage scenarios, and grasp the worst damage scenario, the range of potential flood damage, etc. in each river basin.

We applied the evaluation method to 20 rivers as first case studies, and extracted characteristics concerning effects of flood damage reduction countermeasure alternatives in each river. We confirmed that this evaluation method was useful for examining the effect of flood damage reduction measures, and for explaining the flood risk characteristics of the river basin and the effect of flood damage reduction alternatives to the stakeholders in the river basin.