Trends analysis of river bank erosion at Chandpur, Bangladesh: A remote sensing and GIS approach

Bangladesh which is mainly formed by alluvial deposits faces riverbank erosion very often due to regular shifting of river channels. The present study has undertaken to study the trends of riverbank erosion at Chandpur district. Landsat TM & MSS Satellite image from 1980–1990 and Google Earth high resolution satellite imagery from 2002–2010 were used to delineate the historical changes of the river especially to the left bank alignment of the river course. The study revealed that for long time this area has been suffering with the erosion problem and shifting characteristics of Meghna River. Analysis also showed that in the history of last thirty years erosion rate was higher in the decade of 1990 to 2002 than other two decades and about 3517 sq meter area was eroded. But in the recent interpretation results shows deposition is higher than erosion.