SURFACE RUNOFF ANALYSIS FOR CHAND RIVER BASIN USING SCS-CN METHOD AND GEOGRAPHIC INFORMATION SYSTEM

ABSTRACT: A precise study for understanding hydrological behavior of a watershed is important for effective management. Among the most needed data while planning water control strategies / practices, such as, waterways, storage facilities or erosion control structures, runoff plays a key role. The present study area is Chand river basin, Upper Krishna basin, Western Maharashtra, India. The daily rainfall data of 1 rain gauge station (1998 – 2013) was collected and used to predict the runoff from river basin using Soil Conservation Service – Curve Number (SCS – CN) method and GIS. Annual runoff has been calculated from the annually rainfall data for the years of 1998 to 2013 in the river basin area. The minimum and maximum rainfall for the years of 1998 to 2013 is 167.4 mm and 777 mm respectively and average runoff for the year of 1998 to 2013 is 26.53 mm3 and 151.72 mm3 respectively. The developed rainfall–runoff model is used to understand the watershed and its runoff flow characteristics