Abstract
The damage cost distribution for water-related compound disaster, which flood, storm surge and landslide occurred at the same time, was estimated quantitatively in Japan. Compound disaster was assumed to be caused by rainfall and sea level due to the lowest atmospheric pressure. Firstly, maximum values of rainfall and tide level deviation at the compound disaster were statistically calculated from the relationship between the low atmospheric pressure. The damage cost for compound disaster was estimated using the flood control economy investigation manual. Future damage cost of compound disaster was estimated using future low atmospheric pressure by 4 Global Climate Models and 3 Representative Concentration Pathways scenarios. The potential damage cost of 50-year return period for compound disaster was estimated as 107 trillion JPY in current condition. As a result of future estimation, the damage cost for compound disaster was estimated 1.07 times in near future, 1.08 times in far future compared to the current conditon.
