令和元年東日本台風による長野県長野市の洪水事例における浸水開始後の水平避難実施可能性の検証

抄録

This study estimates the possibility of horizontal evacuation after the start of flooding in the case of Typhoon Hagibis flooding in Nagano City, Japan. A combined inundation and multi-agent evacuation simulation analyses was conducted. In areas where the small river inundation was confirmed, the evacuation success rate was 100% if carried out before the large river began to flood. In areas where there is a significant elevation difference between houses and surrounding roads or where road connectivity is poor, the likelihood of horizontal evacuation after inundation was low. However, in these areas, evacuation success rates improved when people evacuated inundated areas via the shortest possible route.