平成１６年７月新潟・福島豪雨による刈谷田川の洪水災害―洪水流の流下様式と地形の関係―

DOI Web Site 参考文献13件

書誌事項

タイトル別名
  • Flood Disaster along Kariyata River Caused by Heavy Rainfall on July 13, 2004, Niigata Prefecture, Central Japan-The Relation of the Current Processes of the Flood to the Landforms-
  • ヘイセイ 16ネン 7ガツ ニイガタ フクシマ ゴウウ ニ ヨル カリヤ タガワ ノ コウズイ サイガイ コウズイリュウ ノ リュウカ ヨウシキ ト チケイ ノ カンケイ
  • The Relation of the Current Processes of the Flood to the Landforms
  • 洪水流の流下様式と地形の関係

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A huge flood disaster was caused by a heavy rainfall around the Chuetsu area of Niigata Prefecture on July 13, 2004. The flood breached the levees in many places along Ikarashi-, Kariyata-, and Chigoshimizu Rivers, so that many houses were swept away and wide areas were under muddy flood water in Sanjo and Mitsuke Cities and Nakanoshima Town.<BR>In this study, we describe the damages sustained by the flood in Nakanoshima Town area and the southern area of Mitsuke City along Kariyata River, and discuss the current processes of the flood at these areas. It is clear that a surge of the flood attacked houses near by the point of levee breach at Nakanoshima Town, judging from the evidences such as the directions of scours and the traces of flood current toward the houses. The preferred orientations of inclined or felldown houses, traffic signs, fens, etc., indicated the direction change of flood current. Though the primary surge ran powerfully toward southwest, the flood flowed westward being led to the lower topography until the direction changed toward northwest by an obstruction of natural levee. On the other hand, in the southern area of Mitsuke City, the flood current direction was restricted so much by the narrow valley plain that its flood strength increased much more. As the levee of Chigoshimizu River also breached, the older levee, which remained between the present one and fluvial terrace, was collapsed immediately. The flood current did not only lose its power when it had reached at the lowest terrace but also run up beyond the terrace and destroyed some houses standing on it.

収録刊行物

  • 応用地質

    応用地質 46 (3), 153-161, 2005

    一般社団法人 日本応用地質学会

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