都市域の地上・地下空間を統合した浸水解析 INUNDATION ANALYSIS FOR GROUND AND UNDERGROUND SPACES IN URBAN AREA

A storage pond model is developed which can treat inundation of both ground and underground spaces in urban area. The continuity equation, momentum equation without advection, and drop formula are used in the model. The model is applied to Fukuoka city with the underground spaces in JR Hakata station, and Fukuoka flood (1999) is simulated. The computation results show good agreement with the actual record. In the case of Kyoto city, overflow from the Kamo river is assumed. As a result, the underground malls downtown and adjacent subways are inundated. Also the underground spaces which are far from inundation area of ground are inundated by the water flowing through subways.