Comparison between the two triggered landslides in Mid-Niigata, Japan by July 13 heavy rainfall and October 23 intensive earthquakes in 2004
Comparison between the two triggered landslides in Mid-Niigata, Japan by July 13 heavy rainfall and October 23 intensive earthquakes in 2004
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DOI：
10.1007/s10346-007-0093-0
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发表时间：
2007-10
期刊：
影响因子：
6.7
通讯作者：
H. Yamagishi;J. Iwahashi
中科院分区：
文献类型：
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作者：
H. Yamagishi;J. Iwahashi
2004年7月13日，日本新潟县中部地区因暴雨锋面的强烈活动而发生了严重的暴雨。24小时内高达400毫米，破坏河岸，造成严重的洪水。沉重的地震还引发了3,500多起山体滑坡。三个月后，2004年10月23日，新潟县中部南部地区发生里氏6.8级地震。主震之后是密集的余震，一直持续到2004年12月。在这些地震中，丘陵和山区也发生了4，400多起各种滑坡。即不同的触发因素导致了地质地貌特征极为相似的丘陵山区滑坡的变异。因此，这两个事件是非常有用的，以明确两者之间的滑坡特征的差异。我们一直在研究这两个滑坡发生后，在外地和后来分析航空照片使用地理信息系统（GIS）。本文利用GIS分析数据，对强震滑坡与强震滑坡的分布特征进行了比较。
On July 13, 2004, heavy rainfalls because of the intensive activities of the rain front occurred in the Mid-Niigata Region, Japan. They were as much as 400 mm in 24 h, bringing about serious flooding by breaking the river banks. The heavy rainfalls also triggered more than 3,500 landslides. Three months later, the southern region of Mid-Niigata was attacked by an earthquake of magnitude 6.8 on the Richter scale on October 23, 2004. The main earthquakes were followed by intensive aftershocks, which continued until December 2004. By these earthquakes, variable landslides of more than 4,400 also occurred in the hilly and mountainous areas. Namely, different triggers brought about the variable landslides in the hilly mountains whose features are very similar in geological and geomorphological points of view. Therefore, these two events are very useful for clearing the difference in features of the landslides between the two. We have been researching on both landslides in the field just after both occurred and later analyzing air photographs using the geographic information system (GIS). In this paper, we describe the comparison in the distribution features using GIS analytical data between the heavy rainfall-induced and the intensive earthquake-induced landslides.