Drainage Basin Morphometric Analysis using SRTM DEM (90m.): A Comparative Study of Kosi (Bihar) and Kanshabati (West Bengal) Basin, India

Abstract

The morphometric analysis was carried out to determine the drainage characteristics of Kosi (Bihar) and kanshabati (W.B) watershed, India; with emphasis on comparative analysis using Geocoded DEM data of SRTM. The main idea is to examine the stream properties based on the measurement of various stream attributes. The different drainage parameters studied and the measurements related to Perimeter, Area of Sub-Basins, Basin length and number of rivers were determined by using arc gis10.1 techniques. The mean Bifurcation ratio indicates that the Drainage pattern is not much influenced by geological structures. The Shape parameters reveal the elongation of the basin and. The applicability of Horton’s Laws on Stream numbers, Stream lengths and Stream areas is tested by estimating theoretically Bifurcation ratio, Length ratio and Area ratio.

Keywords: Morphometric Analysis, Kosi River, kanshabati River, Stream properties, Perimeter, Area of Sub Basin, Basin length, Mean Bifurcation Ratio, Length Ratio, Area Ratio.