INUNDATION OF THE CHIKUMA RIVER DUE TO THE TYPHOON HAGIBIS IN OCTOBER 2019 AND ISSUES OF EFFECTIVENESS IN EVACUATION PLANS OF ELDERLY WELFARE FACILITIES FOR THE LARGEST EXPECTED RAINFALL

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  • 令和元年東日本台風による千曲川の氾濫と高齢者施設における想定最大規模の降雨に対応した避難確保計画における実効性の課題

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In the heavy rain disaster caused by typhoon HAGBIS in 2019, the collapse of the Chikuma River embankment caused widespread inundation damage in Nagano City. We conducted an inundation trace survey, the flood inundation calculation, and interview surveys of 6 elderly welfare facilities which were damaged by inundation. From the results, the relationships between the evacuation behavior of each facility and the inundation process were analyzed. In addition, we considered the issues of evacuation safety planning in the event of the largest expected flood.

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