Abstract
This paper proposes a method for evaluating flood risk at each community in a municipality to assist its disaster management personnel. The method is particularly designed for municipalities in mountain areas where information is not sufficiently accessible to carry out effective disaster management. Using this method, we conducted inundation analysis for multiple patterns of rainfall and discharge with a rainfall-runoff-inundation model, and estimated the maximum inundation depth and the inundation duration, and other relevant hydrological features. The estimation was then used to prepare a “flood chart” to evaluate flood risk for 19 communities, additionally considering other local characteristics such as aged population rate. Based on the flood charts, we identified flood characteristics of individual communities and proposed flood prevention measures specifically tailored for each community.
