Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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Reservoir Induced Landslide at Assar, Jammu and Kashmir: A Case Study


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1 Department of Geology, University of Jammu, Jammu - 180 006, India
     

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In February 2009, a huge landslide occurred at Assar in Doda district of Jammu and Kashmir state. The slide triggered after the reservoir level of the Baglihar dam increased from initial water level of 850 m to 870 m. The impounding of reservoir water created high angle scarps at number of fossil slide sites on either side of the river within the reservoir area. One such scarp (about 250 m long) at Assar caused a huge landslide washing out about 150 m road stretch. The sliding material is dominated by finer fraction (71.5 %) of micaceous silty sand and coarser fraction of gravel to boulder size. Over saturation of the slope forming material, weak rocks and high absorption and swelling nature of the soil, high slope angle and toe cutting by the water are the main reasons that triggered this slide.

Keywords

Landslide, Pore Water Pressure, Assar, Doda, Baglihar, Jammu.
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  • Reservoir Induced Landslide at Assar, Jammu and Kashmir: A Case Study

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Authors

Yudhbir Singh
Department of Geology, University of Jammu, Jammu - 180 006, India
G. M. Bhat
Department of Geology, University of Jammu, Jammu - 180 006, India
Vinay Sharma
Department of Geology, University of Jammu, Jammu - 180 006, India
S. K. Pandita
Department of Geology, University of Jammu, Jammu - 180 006, India
K. K. Thakur
Department of Geology, University of Jammu, Jammu - 180 006, India

Abstract


In February 2009, a huge landslide occurred at Assar in Doda district of Jammu and Kashmir state. The slide triggered after the reservoir level of the Baglihar dam increased from initial water level of 850 m to 870 m. The impounding of reservoir water created high angle scarps at number of fossil slide sites on either side of the river within the reservoir area. One such scarp (about 250 m long) at Assar caused a huge landslide washing out about 150 m road stretch. The sliding material is dominated by finer fraction (71.5 %) of micaceous silty sand and coarser fraction of gravel to boulder size. Over saturation of the slope forming material, weak rocks and high absorption and swelling nature of the soil, high slope angle and toe cutting by the water are the main reasons that triggered this slide.

Keywords


Landslide, Pore Water Pressure, Assar, Doda, Baglihar, Jammu.

References