ANALYSIS OF OVERLAND FLOOD FLOW INTRUSION INTO UNDERGROUND SPACE IN URBAN AREA

Abstract

This paper treats a numerical analysis of overland flood flow intrusion into underground space in an urban area. A one-dimensional network model to express inundation flow in underground space linked with a horizontally two-dimensional overland flood flows by river bank collapse is developed and applied to Umeda underground market in Osaka city. A slot model is used for the treatment of the pressurized flow condition in underground space. The results obtained show that the model developed here can simulate the aspects of inundation flow into underground space fairly well.