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Journal of Mountain Science

, Volume 4, Issue 3, pp 203–208 | Cite as

Enveloping relief surfaces of landslide terrain

  • A. K. PachauriEmail author
  • Abhirup Chatterjee
  • Reeta Gaur
Article
  • 45 Downloads

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.

Keywords

Relief landslide terrain Himalayas 

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Copyright information

© Science Press 2007

Authors and Affiliations

  • A. K. Pachauri
    • 1
    Email author
  • Abhirup Chatterjee
    • 1
  • Reeta Gaur
    • 1
  1. 1.Department of Earth SciencesIndian Institute of TechnologyRoorkeeIndia

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