Post disaster damages and bank erosion by bhagirathi river in part of bhatwari block, uttarkashi, India

This study is focused on the post disaster damages and recent trend of bank erosion in part of Bhagirthi River koil Bhatwari village. The changes in the river channel for the years 2004, 2011 and 2014 were analyzed using geoinformatics techniques The area of the river of the particular area is extended laterally from 141916.38 sq.m in 2004 to 51642.41 sq.m in 2011 and 226055.70 sq.m in 2014. As a result of it 90592.13 sq.m road, 10895.26 sq.m settlement, 1605141.05 sq.m grass land, 17123.59 sq.m and the agriculture land has been eroded away. It is happen mainly due to increases of intensity of rainfall and increases of frequency of flash flood. Due to increase of sudden discharge in river basin, the kinetic energy of the river is also increased. As a result of the lower part of the river is eroded more than the upper part. It leads to subsidence. But still now the human activities are going on in this hazard prone area. It is a big threat of this area. This study is helpful for planner to development of this area.