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Amiya Landslide in the catchment of Gaula River, southern Kumaun, Uttaranchal



Amiya Landslide in the catchment of Gaula River, southern Kumaun, Uttaranchal



Journal of the Geological Society of India 65(3): 291-295



The southern hills of Kumaun in the proximity of the Main Boundary Trust (MBT) are prone to recurrent landslides. The slope failures are related to steeper angle of hillslope, extent and type of vegetation, structural condition of bedrock, and neotectonism of the MBT. This paper presents the case history of the Amiya landslide of 11 July 1999, which has claimed 22 lives, including 2 persons in a place 20 km northeast of Kathgodam in Kumaun. The slope failure was related to structural conditions of bedrock, particularly five sets of joint spacing and the proximity to the MBT, which has been affected by neotectonic movements in the recent past. The large number of structural discontinuities have diminished the stability of the Siwalik hill slopes, reducing the safety factor to 0.412. The landslip vector has a close parallelism with the geometrically determined wedge failures responsible for the landslide.

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Accession: 029992582

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