旧耐震基準の住宅棟数減少と南海トラフ地震における災害廃棄物低減量に関する検討

抄録

The objective of this study is to reveal the effect on disaster debris reduction by the decrease in the number of dwelling house based on the old earthquake resistance building standards. Using an estimation system of disaster debris amount that we developed, the quantity of disaster debris by the earthquake ground motion and tsunami inundation after the Nankai trough earthquake disaster from 2005 to 2018 was calculated. As a result, the amount of disaster debris were estimated at 327.5 million tons as of 2005, 208.0 million tons as of 2018. In addition, it was pointed out that the reduce of disaster debris after the Nankai trough earthquake disaster requires not only the dwelling house seismic retrofitting but also the comprehensive disaster mitigation against the tsunami inundation.