Mass Wasting Processes in Khairna Basin: Kumaon Himalayas
Journal Title: Universal Journal of Environmental Research and Technology - Year 2015, Vol 5, Issue 4
Abstract
A geodynamically active and geomorphologically sensitive study area (the Khairna river basin) lies between 290 23' to 29031' North latitudes and 790 25' to 79039' East longitudes in the Kumaun lesser Himalayas and covers an area of about 125 km2. The Khairna stream follows the NS tending strike dip Garampani fault and joins river Kosi at Khairna, which lies in District Nainital, Uttarakhand, India. Quantitative measurement of the mass wasting processes (From October 2004- 2007) reveals that about 105477432 m³ material is present as loose material in various forms within the watershed. Out of which is 95160819 m3 debris flow material; about 3544313 m3 is in the form of rock fall material disposed by the active process and about 6736170 m3 by landslide deposits, thus generating material at the rate of 843819 m3/km2 by the means of different mass wasting processes. These active processes in the study area add the mobilized material to the fluvial system and help estimate the denudation rate of the study area. All the processes are responsible for the occurrence of environmental hazards and in extreme conditions, disasters. Only understanding the ground truth related with the causes intensity and impact of these processes can help their planning, mitigation and prevention.
Authors and Affiliations
Jyoti Joshi
Keywords
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