Case Study on Characteristics of Effect of Damage Reduction Measures against Multiple Disasters of Earthquakes and Floods

Abstract

We applied a proposed procedure for estimating the potential direct economic damage and death toll caused by multiple disasters of earthquakes and floods to a case study river, and extracted characteristics of effect of damage reduction measures against the multiple disasters. We assumed a multiple disaster in which a flood occurs after an earthquake, and estimated the potential damage in a river (about 60 km long). We estimated each damage in 120 cases changing the scale of the earthquake and the flood, the interval between the earthquake and the flood, and the countermeasure, considering the emergency works for the levees and roads, and the emergency rescue activities after the earthquake, and so on. We extracted 3 consideration points, which are beneficial for discussing possible damage reduction measures against the multiple disasters.

Multi-Hazard Evaluation Using Cluster Analysis—For Designated Evacuation Centers of Yokohama

“…Other examples of previous research in Japan are given below [1]- [8]. There are research focusing on evacuation behavior due to complex disasters by Takada et al [4] [5], research on damage reduction measures focusing on seismic and floods caused by Itagaki et al [6], research on storm surge inundation prediction when a typhoon hits after a seismic by Kawasaki et al [7]. And Tamura et al [8] proposes a method for assessing multi-hazard risk by incorporating probabilistic ideas and integrating risk curves for individual disasters.…”