Flood disaster mitigation methods considering past flood damages in Japan

摘要

Many cities, that population and assets are concentrating, suffered tremendous damages from inundation and the function of lifeline, etc. had damages in japan. In mountainous area, many houses were swept away by flooding flow due to the influence of sedimentation and woody debris. We investigated the measures against flood disaster prevention analyzing the cause of flood disasters last 5years. Moreover, we introduce the available methods such as protective forest and high graded levee.