Abstract
Serious flood disasters have occurred in recent years. Partial revision of the Flood Protection Law was done due to the Kanto and Tohoku heavy rain disaster, and the flood inundation supposition area was remarked. In this paper, we developed a dynamic optimal economic model to evaluated economic damage of flood disasters, that is included the reconstruction investment, and evaluated economic damage costs for the remarked flood inundation supposition area. It is suggested that the measuring damage costs by previous approach are less than one by new approarh. Next, in the Kofu central area, we investigated flood disaster preventions by utilizing the Location Normalization Plan It showed that location regulation policies may be effective for the constructing bank policies.
