Watershed measures, like other construction and development projects, need to be evaluated in order to analyze the performance of activities and develop basic solutions. Due to the lack of equipment to measure and record the changes in the state of flooding, erosion and sedimentation of watersheds, the use of hydrological models to simulate the behavior of the watershed before and after watershed management measures is an efficient tool in achieving These are the goals. In this study, HEC-HMS hydrological model was used in order to evaluate the actions of Dareh Gardo watershed in Central Province. For this purpose, the geometric characteristics of the structures, sediment volume and empty volume were collected by conducting field visits. By harvesting the area's vegetation, the improvement of the area's vegetation and improving the area's hydrological status was calculated using the SCS method, and by applying the changes made to the model's inputs, simulating the flood behavior for rains with a return period of 50 years in the past. And after watershed management measures. The results of the study, along with the different effect of watershed management measures in reducing the peak discharge and flood volume for different return cycles, recommend its use in order to predict and evaluate the impact of watershed management measures. On a single-event scale, the peak flood discharge for 16 and 56 mm rains, respectively, from 2.81 to 0.16 cubic meters per second (rate of 94.3 percent) and from 20.40 to 1.11 cubic meters per second. (rate of 94.6 percent) decreased. Also, the base time of the hydrograph increased by 55:56 hours (from 4:30 to 60:24 hours) in 16 mm rainfall and by 270:10 hours (from 19:50 to 290:00 hours) in 56 mm rainfall. showed But the volume of the outgoing flood decreased by 1.97% and 2.50% respectively. In the long-term daily mode, the construction of flood dams has reduced the peak flow of the daily hydrograph from 7.5 cubic meters per second to 1.2 meters per second.