Floods are among the world’s top natural disasters regarding loss of life and property. Therefore, we should take precautions against floods, as in other disasters. Preparing flood maps and determining the possible effects of floods before flooding can reduce floods’ potential damages. In this study, flood maps of the Kürtün River, located in Turkey’s Middle Black Sea Region, have been prepared for different return periods (Q25 = 212.17 m3/s, Q50 = 282.30 m3/s, Q100 = 365.10 m3/s, and Q500 = 586.00 m3/s). HEC-RAS and FLO-2D software were used in hydraulic modeling, and CORINE 2018 land cover data obtained by remote sensing techniques was used for determining Manning’s roughness coefficient. HEC-RAS and FLO-2D are free software with a user-friendly graphical interface widely applicable to predict flood zones for impressive flood hazard management planning. HEC-RAS software can be used for river flow routing in steady and non-steady modes. This model is straightforward and practical at the same time. This model can also simulate the branching of channels and any water structures and observe its effect on flow routing. FLO-2D is a 2D model that can model the flood wave propagation and debris flows in hydrographic basins. The key feature of this model is interacting with different structures that determine the anthropized areas between which bridges, manholes, and dams. The results of the two models were integrated with ArcGIS, and flood scenarios with different return periods were created and compared. Risky areas under water were identified, and recommendations were made for the study area.