都市域における高潮氾濫解析

Abstract

Overland flood flows due to storm surge in an urban area are studied by means of a numerical analysis model which comprises a 2-D storm surge model and a 2-D overland flood flow model. First, actual overland flood flows caused by a storm surge are simulated and the accuracy of the simulation results is examined. Next, the measures for storm surge in Osaka city is evaluated. Finally, the main factors of urbanization, buildings, houses and a sewerage system are taken up, and their influence on the characteristics of overland flood flows is discussed. Through these studies, the validity of the simulation model for inundation analysis is demonstrated and the influence of urbanization on overland flood flows is clarified.