Characteristics of landslide distribution after the Mid-Niigata Prefecture Earthquake in 2004

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  • USHIRONE Yuki
    Erosion and sediment Control research Group, Public Works Research Institude Now in Eight-Japan Engineering Consultants Inc. Kyusyu branch
  • NISHII Ryoko
    Erosion and sediment Control research Group, Public Works Research Institude Now in Niigata University
  • ISHII Yasuo
    Erosion and sediment Control research Group, Public Works Research Institude
  • SAKURAMOTO Tomomi
    Erosion and sediment Control research Group, Public Works Research Institude
  • TOHEI Masaru
    Erosion and sediment Control research Group, Public Works Research Institude Now in Sabo & landslide technical center

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  • 平成16年新潟県中越地震後に発生した地すべりの分布特性について
  • ヘイセイ 16ネン ニイガタケン チュウエツ ジシン ゴ ニ ハッセイ シタ ジスベリ ノ ブンプ トクセイ ニ ツイテ

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<p>  The characteristics of landslide distribution after the Mid Niigata Prefecture Earthquake in 2004 were investigated using spatiotemporal data on landslides from 2001 to 2016 in the Chuetsu region, Niigata Prefecture. In the northeastern part of the Kawaguchi region (covering approximately 17×17km), the occurrence of landslide increased after the earthquake. Most of the landslides after the earthquake in this region tended to be distributed in areas where many landslides occurred at the earthquake and where the maximum acceleration and/or seismic intensity were high. In addition, in some case, the amount of rainfall immediately before the occurrence of landslides during the rainy seasons (June - November) after the earthquake was smaller than that before the earthquake. Moreover, 77% of the landslides after the earthquake had areas of less than 1×103m2, which tended to be considerably smaller than those before and at the earthquake.</p>

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