K.L. Debbarma and S.J. Baishya
Abstract
GIS and Remote sensing approach is an effective tool to determine the morphological characteristics of the basin. The Dhalai River basin located between 23°49â6ââand 24°13â41ââN latitudes and 91°45â56ââ and 91°57â47ââ E longitude. The present study addressed linear, areal and relief aspects of the drainage basin. Toposheets and SRTM (Shutter Radar Topography Mission) DEM at 30 m resolution has been used to delineate the basin and drainage network in the Arc GIS software.From this study we have derived that the basin is having sub-dendritic pattern and the average drainage density of the basin is 4.1km/km² which indicates, moderate drainage texture and steeply to very steeply sloping mountainous terrain with variation in vegetation coverage. The elongation ratio of the Dhalai River basin is 0.19 which implies that the basin is elongated. Morphometric analysis based on GIS & Remote sensing techniques is a competent tool for hydrological studies. The present study would be beneficial to various decision-makers and policy makers for the integrated river basin management.