Abstract
Sensitivity of the physiographic factors of the basin such as the terrain, infiltration, river geometry and size of the mesh used in numerical analysis, which cause the drawback in modeling, is investigated employing a practical approach. This is shown using a new physically based model which estimates both the surface and the subsurface runoff. Both runoffs are coupled simultaneously through the infiltration rate in which land uses and ground elevation of the basin were obtained using numerical remote sensing and GIS data via data processing, respectively. Results of this approach are promising.
