Rainfall runoff estimation using SCS Model and ARCGIS for Micro watershed in Cuddalore district

Surface Runoff is one of the important parameter in hydrological studies. The estimation of surface runoff is necessary to design any hydraulic structure and also to determine flood risk analysis. The present study aims to calculate the surface runoff by using remote sensing and Arc Gis and the method used to calculate the runoff volume is SCS curve number method. The study chosen was Cuddalore micro watershed in Cuddalore district of Tamilnadu. The Total area of the taken for this study is 58.54 km². The soil map and land use and land cover maps were created in Arc gis software. The curve number values for the study area is calculated based on natural resource conservation service (NRCS) standard table. The estimated runoff in the study area is 4260 mm.