Slope Failure Disasters in Northern Slope of Mt. Wanitsuka and Upstream Area of the Hiroto River due to Heavy Rainfall by the Typhoon0514 in Miyazaki Prefecture

DOI Web Site 4 Citations 7 References
  • KOGA Mitsuhisa
    Kyushu Technical Center, Kokusai Kogyo Co., Ltd.
  • HORIKAWA Takenobu
    River Control and Sabo Department, Kyushu branch, Kokusai Kogyo Co., Ltd.
  • USHIRO Akira
    River Control and Sabo Department, Kyushu branch, Kokusai Kogyo Co., Ltd.
  • TANIUCHI Masahiro
    River Control and Sabo Department, Tokyo Technical Center, Kokusai Kogyo Co., Ltd.

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Other Title
  • ２００５年台風１４号による宮崎県鰐塚山北麓および北郷町広渡川上流の崩壊・土石流
  • 2005ネン タイフウ 14ゴウ ニ ヨル ミヤザキケン ワニヅカヤマ ホクロク オヨビ キタゴウマチ ヒロトガワ ジョウリュウ ノ ホウカイ ドセキリュウ

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Abstract

In Miyazaki Prefecture, slope failure disaster and flood disaster occurred due to the heavy rain accompanying the passage of typhoon 0514 early in September 2005, causing great damage. In the area of Mt. Wanitsuka (1, 118m), which is about 20km southwest of Miyazaki City, the total rainfall from September 3rd to the 6th reached 1, 013mm, resulting in large-scale slope failure particularly in the northern slope; debris flows occurred in the upstream area of the Kiyotake River, and a lot of earth and sand deposited in the lower stream of the river. There were two types of slope failure, collapse and landslides. In the upstream area of the Hiroto River in Kitago Town, large-scale slope failure occurred, which led to the formation of a natural dam.

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