ESTIMATION OF HOUSE DAMAGE AROUND RESERVOIR BODY BASED ON FLOODED ANALYAIS

Abstract

One of the damages caused by the large earthquake is the damage to the houses caused by the outflow from the reservoir. The residents are forced to evacuate vertically to the upper floors of the house because the the down floor is flooded before evacuationg to another location. However, the risk of damage to houses due to the collapse of the reservoir is not clear in current hazard map, and there are few damage cases and survey data. In this study, the flow velocity and flood depth of the collapsed reservoir are predicted by 3D flood analysis, and the risk of damage to the house is evaluated. As the result, the velocity and flood depth depended on the topography, and the less damage under the new seismic standards was found.