IJSRP, Volume 3, Issue 7, July 2013 Edition [ISSN 2250-3153]
Chalantika Laha, Dr. Sunando Bandyapadhyay
An attempt has been made to study one of the most severe hazards in West Bengal, India. Study has been carried out to analyze and report the river bank erosion due to morphometric change of the Ganga River, upstream of Farakka Barrage up to Rajmahal. Here, Sinuosity, Braidedness Index, percentage of the island area to the total river reach area have been measured for the year of 1955, 1977, 1990, 2001, 2003, 2005 and 2010. The analysis shows a drastic increase in all of those parameters over the period of time. For increasing sinuosity, the river has been engulfing the large areas of left bank every year. The victims are mostly from Malda district. Another task of this study is to get the temporal shift monitoring for the river reach. 22 cross-sections have been made to get that shift statistics along each cross-section. This task has been followed by vulnerability analysis to assess the risk for the gram-panchayets for next 10 years. These risk zones have been identified by applying linear regression method for each cross-section after proper validation. So, by risk zoning with the aid of remote sensing and GIS technologies, we can plan for better hazard prevention and preparedness programs.