The study of watershed characteristics is necessitated for working out a comprehensive development plan of the watershed for optimum use of its resources. The morphometric analysis can be achieved through measurement of linear, aerial, and relief aspects of the watershed. In the present study, quantitative morphometric analysis is carried out for 15 sub-watersheds of Sweta Nadi Basin, which is located in Salem district, Tamil Nadu. It will be the input to evaluate the basin hydrology, water resources, input and output component in the hydrology cycle. The Geographical Information System (GIS) has been made in this study, since it is an excellent tool for the management of large bodies of spatially extensive data with all the advantage of a computer environment; precision, consistency and absence of computational error. This powerful tool holds a very large potential in the field of regional and micro-level spatial planning particularly in sub-watershed planning and management.