REDUCING POLICY OF PUBLIC FACILITIES AND THE ACCESSIBILITY TO FLOOD EVACUATION SITES

Abstract

In Japan, many public facilities constructed during high economic growth era will reach the end of service life in near future. Coping with population decrease and social environment changes, number of public facilities may be reduced. On the other hand, in the flat area with flood risk, public facilities also provide a function of evacuation sites. We need to consider the impact of facility reduction policy on the accessibility of flood evacuation. In this research, we analyzed the issue by using two models. The first model sets up the facility renewal and reduction scenario that aims to maximize the convenience of residents in normal times while suppressing public expenditure. The other model evaluates how many people can successfully evacuate to the flood space provided as the public facilities. This research indicates the following results. If the number of facilities is mildly decreased, the evacuation accessibility will become simply worse. But, even when public facilities are greatly reduced, the evacuation accessibility can be improved if facility locations and floor space distribution are appropriately selected.