| Enveloping Relief Surfaces of Landslide Terrain |
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| 作者姓名： | A.K.Pachauri Abhirup Chatterjee Reeta Gaur |
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| 作者单位： | Department of Earth Sciences Indian Institute of Technology，Department of Earth Sciences，Indian Institute of Technology，Department of Earth Sciences，Indian Institute of Technology，Roorkee-247667，Uttaranchal，INDIA，Roorkee-247667，Uttaranchal，INDIA，Roorkee-247667，Uttaranchal，INDIA |
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| 基金项目： | This research was Department of Science Government of India supported by the and Technology, |
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| 摘 要： | Two relief surfaces that envelop the rock fall region in a part of Garhwal Himalayas around Chamoli have been identified. Relative relief and absolute relief have been analyzed and the enveloping surfaces recorded at two levels of relief in the landscape. All landslide activity lies within these surfaces. The lower enveloping surface (800 m) dips due south by 7-8 degrees,due to an elevation rise of 100 meters within 12 km from south to north,i.e.,a gradient of 8 percent. The nature of the surface is smooth. The upper enveloping surface (> 2500 m) is almost parallel to the lower one but its surface is undulatory due to landslides and denudation. The area has been a seismically active region and has undergone seismic activity up until recently,as evidenced by the Chamoli earthquake of 29th March 1999. The effects of earthquakes are seen at higher levels in the form of landslide imprints on the terrain.
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| 关 键 词： | 喜马拉雅山脉 滑坡 地形 预防措施 |
| 收稿时间： | 25 April 2007 |
| 修稿时间： | 2007-04-25 |
Enveloping relief surfaces of landslide terrain |
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| A.K.Pachauri Abhirup Chatterjee Reeta Gaur.Enveloping Relief Surfaces of Landslide Terrain[J].Journal of Mountain Science,2007,4(3):203-208. |
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| Authors: | A K Pachauri Abhirup Chatterjee Reeta Gaur |
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| Institution: | (1) Department of Earth Sciences, Indian Institute of Technology, Roorkee, 247667, Uttaranchal, India |
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| Abstract: | Two relief surfaces that envelop the rock fall region in a part of Garhwal Himalayas around Chamoli have been identified. Relative relief and absolute relief have been analyzed and the enveloping surfaces recorded at two levels of relief in the landscape. All landslide activity lies within these surfaces. The lower enveloping surface (800 m) dips due south by 7-8 degrees,due to an elevation rise of 100 meters within 12 km from south to north,i.e.,a gradient of 8 percent. The nature of the surface is smooth. The upper enveloping surface (> 2500 m) is almost parallel to the lower one but its surface is undulatory due to landslides and denudation. The area has been a seismically active region and has undergone seismic activity up until recently,as evidenced by the Chamoli earthquake of 29th March 1999. The effects of earthquakes are seen at higher levels in the form of landslide imprints on the terrain. |
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| Keywords: | Relief landslide terrain Himalayas |
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