Flood production potential zoning in Kasilian Watershed with GIS

Run off generation is determined by watershed characteristics: climate, topography, soil and vegetation. Also, it is necessary to know the area with high run off generation in terms of watershed management. In this study Kasilian Watershed with 68 km2 surfaces was separated to 32 small sub- basins. The purpose of this study is flood production potential zoning. In first, physical model of Kasilian Watershed was simulated by using GIS (HEC-GeoHMS extension) and DEM. Then, a rainfall-run off model was presented by using SCS method and HEC-HMS software for Kasilian Watershed. The presented model was optimized and validated. Then sub-basins flood production potential was investigated by using sub-watershed single successive elimination method and these sub-basins were classified in terms of run off generation and flood production potential. Finally, the results were presented as a flood production potential zoning map.