In the Kakehashi River Basin in Ishikawa Prefecture, inundation simulations were conducted by using rainfall data under the global warming condition. After identifying the areas requiring evacuation based on the inundation simulations, the number of evacuees to each evacuation center was calculated in consideration of the difference in population distribution by time zone. The number of evacuees increases more than 300 in areas where the population increases during the day. Not only the number of residents, but also the number of visitors during daytime has to be considered to make evacuation plan. In addition, number of evacuees were calculated under urban structural changes assuming relocation from areas with higher flood risk to lower risk areas in the condition of future population decline. Under the declining population, it was possible that the number of people requiring evacuation could potentially decrease significantly. However, the results of the computable urban economic model showed insufficient relocation, and indicate the need for appropriate relocation promotion measures.

 To reduce the damage by heavy rain which is becoming extremely severe, it is required to provide an appropriate flood information and to make an suitable index for resident’s evacuation action. The purpose of this study is to consider the appropriate timing and classify residents' evacuation behavior during floods by analyzing the evacuation action linked with simulated flood inundation from 15 breaching locations in Kawajima Town, Saitama Prefecture. From the analysis results, the inundation characteristics of Kawajima Town which is affected by Nagaraku embankment, natural levee and inland water inundation from the Ando River are clarified. The conditions whether residents can evacuate or not are revealed. Moreover, the evacuation patterns for saving life by themselves are classified using a risk map with the information in a flood hazard map.