In the nature, water is in constant circulation between the Earth's surface and the atmosphere. Runoff, as one of the processes in the hydrological cycle significantly impacts the environment, human society, and its activities. Over the years, climate conditions have changed, leading to more frequent extreme events such as droughts and floods. In order to assess and manage flood hazards, a methodology has been established to determine the high probability flood hazards for the Curak and Jasle sub-basins. In developing the runoff model for the mentioned watershed, the MFD method was used. As a result of multiple iterations, the model provides accumulated runoff depth at specific locations. Using Manning's equation and the model's results, the flow was compared with measured discharge with the annual exceedance probability of 1% at the Zeleni Vir gauging station. By comparing the measured discharge and the calculated discharge, a difference of 3.1% was determined. Therefore, it can be concluded that the model accurately describes the runoff for the specific discharge use in the calibration procedure. By using this model, it is possible to obtain a spatial distribution of water depths across the Curak and Jasle basin, thereby preventing and potentially mitigating potential damage to the surrounding area.