Estimation of Surface Runoff Potential using SCS-CN Method Integrated with GIS

This paper deals with estimation of surface runoff potential from rainfall for Thiruporur Block, Kancheepuram District in Tamil Nadu, India, through Arc GIS version 10.2 by SCS CN number method which is a widely used and efficient method for determining the amount of runoff from a rainfall event in a particular area. The runoff curve number is one of the most widely accepted and frequently used techniques for the estimation of storm runoff. The surface runoff is mapped for whole of Kancheepuram District, from which the runoff of Thiruporur block boundary is delineated in order to obtain higher accuracy of surface runoff. The seasonal variation of rainfall runoff of the study area is also depicted. The surface runoff potential estimated through SCS-CN method can further be used for the management of water resources and land.