Retreat of Gangotri glacier and find out the snout position using Remote Sensing and Geographic Information Systems

The Gangotri Glacier is situated at the Himalayas in the Uttarakhand state of northern India, and it is the main origin of the River Ganga. The major motive of this study is to estimate the retreat of the Gangotri glacier over three decades using visual clarification of remote sensing data. By the utilization of manual digitization of different Landsat images marking of place is done. In this study satellite data are used to mark the snow area and muzzle point of different year. In addition, these data were used to monitor changes in the position of glacier and displacement of glacier distances. During the study period (1993-2021), the cumulative retreat of the glacier was measured to be 1,850nu and the average rate of glacier retreat was 61.66 m/year. The results of this research may draw the consideration of the scientific community and initiate a more conclusive study on the differential retreat of glaciers in Gangotri and other Himalayan glaciers