ASSESSMENT WITH VORONOI'S DIAGRAM FOR DISPOSITION OF EXISTING HOSPITALS CONSIDERING REGIONAL SEPARATION UNDER EARTHQUAKE DISASTERS : A case study in Tomakomai, Hokkaido(Disaster)

Abstract

Disposition of existing hospitals is assessed by use of the Voronoi's diagram considering regional separation under earthquake disasters. Tomakomai city, one of the important industrial cities in Central Hokkaido Japan is chosen as a case study. According to the loss estimation of the city government, totally 398 persons will be injured due to the nearest inland earthquake. In this study, major 12 medical facilities are selected and their dispositions are assessed under the condition of 20% of them should be hospitalized. Spatial imbalance in the central part of the city is pointed out. In the cases of regional separation by railroad and wide river are assumed and their dispositions are also assessed.