Approaching Flood Risk Management by Creating a 3D Model at the Watershed Level

The number of major floods globally has been consistently significant in recent years. By using several methods of acquiring and processing geospatial data, this research aims to develop a digital terrain model that supports the modeling of sudden increases in water levels in a river to provide a true picture of the areas at risk. The main contribution of this research is the way to perform coupled geospatial, hydrological and hydraulic calculations, which are performed in the area of interest and which will highlight the characteristics of the water flow corresponding to the maximum flows with the exceedance probabilities of 10%, 1%, 0.5% and 0.1%, as well as those corresponding to the maximum flows resulting from the storage dam failure scenarios in the area. The research results indicate that the creation of a 3D model at the river basin level is the most important step in flood risk management.