Comparative Study of Two Meander Loops for their Planform in Hooghly River, West Bengal-Remote Sensing Based Approach

A comparative study on the planimetric changes of two meander loops in Hooghly river, West Bengal was carried out using remote sensing techniques. Multi date and multi sensor satellite data were used to map the changes. The lineament analysis of the basin was carried out to understand the morpho-tectonics relationship. The planirnetric meander geometry was measured from the satellite data in GIS environment Change detection study was carried out to understand the changes. It was seen that the Charchakundi Bisnupur meander loop behaved differently in comparison to the Diar-Balagachi meander loop in the same river system. The changes were attributed to the meander geometry controlled by lineaments. The latest data of 1991-Time period was taken since the oldest data of 1975-Time period had comparable spatial resolution with 1991 satellite data Landsat MSS of 1975-Time period had 80-Meter spatial resolution whereas Indian Remote Sensing data of 1991 time period (IRS- IA/IB) had 72-Meter resolution.