Demarcation of potential avalanche sites using remote sensing and ground observations: a case study of Gangotri glacier

This study demonstrates the effectiveness of remote sensing and analytical hierarchy process for avalanche hazard mapping. The layers incorporated in this study were of slope, aspect, profile curvature, ground cover and elevation. The accuracy of output was determined using the registered avalanche sites based on ground observations and field-based modelling techniques. 93.35% of avalanche-affected areas came under maximum and moderate hazard zones, thus proving the effectiveness of this technique for Gangotri glacier basin. A parallel study was done to observe the change in the results, if any, by using high-resolution DEM and Cartosat-1 imagery. Similar methodology was adopted and the outcome was having significant improvement over the previous result as 98.8% of the preregistered avalanche area falling within maximum and moderate hazard zones.

[1]  D. Mcclung,et al.  The Avalanche Handbook , 1993 .

[2]  A. P. Krishna.  Satellite remote sensing applications for snow cover characterization in the morphogenetic regions of upper Tista river basin, Sikkim Himalaya , 1996 .

[3]  K. Birkeland,et al.  Avalanche extremes and atmospheric circulation patterns , 2001, Annals of Glaciology.

[4]  L. Buisson,et al.  Avalanche Starting-Zone Analysis by use of a Knowledge-Based System , 1989, Annals of Glaciology.

[5]  I. M. Bahuguna,et al.  Glacial retreat in the Baspa basin, Himalaya, monitored with satellite stereo data , 2002, Journal of Glaciology.

[6]  Tobias Bolch,et al.  Glacier changes in the Garhwal Himalaya, India, from 1968 to 2006 based on remote sensing , 2011, Journal of Glaciology.

[7]  T. L. Saaty.  A Scaling Method for Priorities in Hierarchical Structures , 1977 .

[8]  Markus Christen,et al.  Automated detection and mapping of avalanche deposits using airborne optical remote sensing data , 2009 .

[9]  S. Sharma,et al.  Complexities of avalanche forecasting in Western Himalaya — an overview , 2000 .

[10]  E. Isaksson,et al.  Measuring snow and glacier ice properties from satellite , 2001 .

[11]  I. M. Bahuguna,et al.  Himalayan glacier retreat using IRS 1C PAN stereo data , 2007 .

[12]  M. Maggioni,et al.  The influence of topographic parameters on avalanche release dimension and frequency , 2003 .

[13]  Andreas Kääb,et al.  Assessment of the hazard potential of ice avalanches using remote sensing and GIS‐modelling , 2004 .

[14]  Umesh K. Haritashya,et al.  Mapping Dry/Wet Snow Cover in the Indian Himalayas using IRS Multispectral Imagery , 2005 .

[15]  D. Scott.  Using GIS and Remote Sensing to Assess Avalanche Hazards for New Road Corridors in Alaska , 2006 .

[16]  A. N. Nazarov,et al.  Avalanches: a probabilistic approach to modelling , 2001, Annals of Glaciology.