Synergetic use of active and passive remotely-sensed and map data in the delineation of part of Godavari palaeocourse

Abstract

Map information for ( 1937-38 and 1965-66) Indian Remote Sensing Satellite (IRS) data of October 1988 and 1990, Landsat-TM data of 1987 and airborne SAR data ( 1988) were used in the identification of river course, geomor-phological features and palaeo channels over part of the Godavari river, India. The change in river course and growth and erosion of the island/ sand bar were measured. The palaeocourse of the river at test sites has been reconstructed. The measured cut-off ratio indicates that the chute cut-off of the river course near Gannavaram is very high. Flood affected areas in the regions could be assessed by this method.