Abstract
Water utilities in Japan should redeign their water distribution system considering the decrease of water demande and rebuilt their deteriorated distirbution pipes. The purpose of this study is to examine the concept of water distribution system redesigning from the viewpoints of self-cleaning function, fire protection function, and earthquake disaster resilience. In this study, a procedure of downsizeing and redesigning of water distribution network applied to the actual water distirbution system in Kobe City, the performance of fuctions in seld-cleaning, fire protetion, and earthquake disaster resilience were evaluated. As a result, a tradeoff between self-cleaning function and fire protection fuction was pointed out. In addition, it was indicated that the balance between earthquake disaster resilience and self-cleaning fucntion is requied for water system in Japan.
