Flooding is a natural hazard and a devastating catastrophe for human society. This hazard is occurring frequently in human communities in the recent years due to improper development of human settlement in watersheds and expansion of impermeable surfaces in drainage areas. Thus, it is essential to determine flood prone areas and make a plan for precautious measures. Moreover, preparation of hydrographs and the assessment of hydrological parameters at the level of basin drainage can give us an accurate evaluation of the flood prone areas in basins. Amame Drainage Basin as one of the sub-basins of Jajrud is proper for evaluation of Watershed Modeling System (WMS), due to the available hydrologic data. This research has made a zonation of the areas susceptible to flooding on this watershed to identify risk parts in surrounding villages using hydrological models in WMS. To do this, we have used WMS-HEC-1 (Hydrologic Engineering Center) Model for SCS (Soil Conservation Service ) unit hydrograph by one flood event. For the zonation by WMS-HEC-RAS4.1 (Hydrologic Engineering Center-River Analysis System) in WMS9.1, up to 29 cross-sections have been utilized along the river centerline. The results have indicated that the highest amount of inundation by a possible flooding is in rural areas in the vicinity of the river, near Amame Village.