ESTIMATION OF DISASTER WASTE INTENSITY BASED ON RECENT FLOODS

Abstract

 During the recovery and reconstruction of disaster-stricken areas, or while conducting preliminary measures for preventing disasters, it is important to assess the amount of generated disaster waste. However, the amount of disaster waste generated by floods is increasing in frequency and scale and is often estimated on the basis of data acquired during the early 2000s in Japan, threr are no existing studies that estimate the intensity for the large-scale floods. Hence, in this study, we gathered disaster information associated with the number of houses damaged and the amount of waste disposed by the Japanese municipality during the floods that occurred between 2009 and 2018, and we then incorporated the information to estimate the amount of generated disaster waste by categorizing the housing damage. Based on the obtained results, the estimated amounts of disaster waste (in units of tons per dwelling) for various damage categories are as follows: 70.683 for complete destruction, 9.373 for partial destruction, 8.507 for half-destruction, 5.137 for inundation above floor level, and 0.278 for inundation below floor level. Furthermore, the amount of disaster waste generated by previous disasters was calculated on the basis of the aforementioned estimated amounts, and it is found that the amount of disaster waste can be estimated with high-accuracy.