浸水シミュレーションを活用した都市地下空間における水防・避難誘導の検討

抄録

In Japanese urban areas, a lot of underground spaces have been formed complicatedly. In these underground spaces, the risk of inundation has increased more and more, as heavy rainfall happens frequently in recent years. Each manager of the underground spaces is obligated to make the evacuation plan under the Flood Control Act. However, some of them do not manifest when flood prevention activity should be set off, so it is necessary to examine the inundation process. In this study, we simulated the inundation process by a numerical simulation model which unifies street level and underground spaces, and we cleared a criterion to start the flood prevention activity and evacuation direction in the underground space in Umeda, Osaka. Furthermore, it is cleared that improving some barricades at the street level entrance to the underground space and cooperating with related organizations are indispensable for effective and efficient execution of the plan.