NEW METHOD TO ESTIMATE FLOOD WASTE USING THE DATA OF THE NUMBER OF DAMAGED HOUSES AND RESIDENCIAL ANALYSIS

Abstract

 The prediction of approximate flood waste amount before and immediately after flood occurrence is an essential element in designing a treatment plan. However, the methodology for predicting the amount of waste produced in large-scale flood, until recent, remains unexamined. In this study, we attempt to develop a method to estimate the amount of flood waste, which can be applied to a large-scale flood in recent years and future. The developed method only requires the statistical information on housing in the damaged area and housing damage information, and either of which can be obtained even in the early stages of flood disasters. The method is mainly based on the actual data of Western Japan Heavy Rain (2018) and Joso flood (2015), and furthermore, it is under the assumption that most of damaged buildings are wooden houses, the dismantle rate differs depending on the extent of damage, and non-wooden houses which are not officially recognized as damaged houses also generate waste. The result of prediction using the developed method was also validated with the actual data and compared with the conventional method. The method developed in this study can estimate the amount of flood waste with a more agreeable result with the actual amount compared to the conventional one.