Application of Morphometric Analysis for Geo - Hydrological Studies Using Geo - Spatial Technology - A Case Study Of Kolamba River Basin

The analysis of marphometric parameters of Kolamba river basin has been carried out using Arc GIS 10.5. This study involves Geographic Information System (GIS) techniques to evaluate and compare linear, relief and aerial parameters of Kolamba River and has been taken up for prioritization. Linear parameters include stream length (Lu), stream order (u) and stream number (Nu). In aerial parameters area (A) and perimeter (P) are important factors. Compound parameter (Cp) was calculated and prioritization ratings have been carried out. The present study area covers 88.69sq.km. Kolamba river basin has three sub streams which are Nigadi stream, Chikli stream, and Antwadi stream. The Kolamba river is 6th order stream having length of about 1.42 km. It has latitude 17030’N and 17030’N and longitude 7400’E and 74015’E. This area is included in Survey of India (SOI) topographic sheet no. 47 K/3 on the scale 1: 50000. The drainage network is delineated by using False Colour Composite (FCC) and Indian Remote Satellite (IRS-1D) LISS 3 satellite images and Survey of India toposheet. Cartosat DEM (30m) is used for this marphometric analysis. This area receives high rainfall but after mansoon this area suffers from drought condition. This area is high relief mountainous area. Drainage pattern is dendritic in nature. The marphometric parameters like Bifurcating ratio (Rb), Elongation ratio (Re), Drainage Density (Dd), Texture Ratio (Tu), Form Factor (Rf), Stream Frequency (Df) etc. gives brief explanation about study area. Hence marphometric analysis is very helpful to understand the various characteristics of drainage basin.