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Generating a Spatially Distributed Rainfall-Runoff Model Using GIS
Bok av Alipoursafari Homayoon
A spatially distributed rainfall runoff model is developed with the aid of a raster GIS and minimal amount of field data that could predict the outlet hydrograph of an ungauged basin. The Basin is divided into several subareas and for each subarea a physically based advection-dispersion equation, also called diffusion wave, is used to represent the subarea response function to instantaneous excess rainfalls. The model is applied to a 173.9 km2 mountainous watershed and the calculated hydrographs are compared with the observed events and results of SCS unit hydrograph method.