A NUMERICAL SIMULATION OF DISASTER WASTE DISPOSAL IN WAKAYAMA CITY BY USING DHT MODEL
Keywords:
Disaster waste disposal, Dynamic hauling/transportation model, Sensitivity analysis, Nankai Trough huge earthquake, Wakayama cityAbstract
We conducted a numerical simulation of disaster waste disposal by using a Dynamic
Hauling/Transportation model (DHT model) in order to extract the factors to hinder the execution of a disposal
management plan of Wakayama city government. The DHT model was developed for estimating number of
days required for disaster waste disposal, following parameters are mandisopdatory as the model inputs; (1)
disaster waste characteristics (distributions, volume and contents) in damaged area, (2) hauling/transportation
route, (3) number/capacities of transportation vehicles, (4) maximum capacities at temporary storage / final
disposal sites and (5) abilities of crushing/classification equipment. Almost all parameters were set by referring
to a planning document of disaster waste disposal provided by Wakayama city and disposal guidelines
published by Ministry of the Environment of Japan. Several parameters without description in these
document/guideline, e.g. maximum capacities at temporary storage and distance of hauling/transportation route
were estimated by using GIS. Severe shock and tsunami caused by Nankai Trough huge earthquake were
adopted as external forces generating disaster waste. By assumption that parameters included in (3) and (5)
could be critical parameters for a result of simulation, we performed sensitivity analysis of each parameter in
them. As a result, abilities of several crushing / classification at temporary storages were the most sensitive
parameters of all evaluated parameters. Therefore, augments of crushing/classification functions at temporary
storage might be effective to shorten processing days for disaster waste disposal