It is important to examine carefully the quality of the used DEM to extract drainage network. In this work, the quality of SPOT 5 and SRTM DEMs was examined with Ground Control Points (GCPs) their elevations obtained from Global Positioning System (GPS) technique. In this study, satellite images were used after doing geometric correction to classify the study area to determine zones and constructions like buildings, roads, which may be affected during flash flood. The study area contains 75 districts as shown in Fig. 3.