Geo-Eye

Abstract

The availability of the water resource in a catchment depends upon the integrity of the land use, terrain and meteorological parameters such as rainfall, temperature, etc. KRS Catchment in the Cauvery basin covers an area of 10,957 Km2 was taken up for the study. The study was conducted in order to understand the changes of Landuse /Landcover and their impacts on the watershed and to estimates the runoff calculation using SCS-CN method, which is mainly used for estimating infiltration characteristics of the watershed, based on the land use property and soil property and it is widely used as a simple method for predicting direct runoff volume for a given rainfall event.In the present study, the methodology for assessing the landuse/ landcoverchanges and determination of runoff for KRS Catchment using Remote Sensing, GIS and SCS method was described.Analysis of the landuse/landcover revealed the changes taken part from 2006 to 2017. Major changes were from forest and barren land to agriculture, built up and water bodies.The SW Monsoon rainfall and landuse data were used along with the experimental data of soil classification for the estimation of the runoff for the study area. The result shows excess runoff and low infiltration take places mostly in the month of July followed by June, august and lowest runoff on the month of September.This will help for watersheds planning of various conservations measures.

Keywords: KRS Catchment, Runoff, SCS Curve Number, GIS, Remote Sensing.