CATCHMENT MODELLING IN GIS ENVIRONMENT

Abstract

Simulation of rainfall-runoff process is one of the important areas of research in. the field of surface water hydrology. Soil conservation services( SCS ) approach is one of the simplest and most commonly used technique, involving simple empirical formulae, for estimation of direct run-off depth from storm rainfall. The application of this approach requires a reliable information on various characteristics of a.basin such as topography, land cover, rainfall, drainage, soils and geology etc. The information normally acquired from different sources is large in volume and needs an efficient system which stores, handles, manipulates and analyzes this information. A Geographic Information System (GIS) is a computer based system designed to store, process and analyze spatial data and their corresponding attribute information. Due to their capabilities and wide applications the GISs are becoming important in natural resources management.