| This study assesses the role of geographic information technology in hydrological studies. A review of rainfall modeling, drainage network and watershed data structures for representation in a GIS, the preparation of hydrologically sound digital elevation models and the delineation of watersheds is provided. A shell program was written which uses the IDRISI GIS software to map soil and land use features and delineate watershed boundaries from a digital elevation model, calculates infiltration factors and prepares an input file for the OTTHYMO hydrological model for storm water management and flood control. The effectiveness of using a simple raster GIS for the parameterization of a lumped hydrological storm water model is assessed. |
