FLOW CHARACTERISTICS OF DEBRIS FLOW WHICH WAS HAPPENED IN KUMANO, HIROSHIMA IN JULY, 2018

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  • 2018年7月に広島県安芸郡熊野町川角で発生した土石流の流動特性
  • 2018年7月に広島市安芸区矢野東で発生した土石流の流動特性
  • 2018ネン 7ガツ ニ ヒロシマシ アキク ヤノ ヒガシ デ ハッセイ シタ ドセキリュウ ノ リュウドウ トクセイ

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Abstract

<p> Field observation and numerical analysis were performed for the debris flow which was happened in Kumano, Hiroshima in July, 2018. Three debris flows were happened and the debris flow from the north valley attacked the residential area and damaged many houses. The debris flow composes of wide graded sediment. The results of the numerical analysis show that the debris flow approached at the residential area in 50 sec. and the average speed on the slope is 9m/s. The information of the inundation area and the debris flow depth can be used to consider the evacuation method in case which people cannot evacuate in long distance during the heavy rain.</p>

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