Identification of areas with potential significant flood risk using specialized software in the Vistula river basin within Ukraine

In the period of climate change, the frequency of extreme hydrological phenomena increases, therefore, an extremely important problem in the hydrological study of the territory is the determination of areas with potentially significant risks of flooding, as well as the construction of maps of threats and risks of flooding. The basin of the Vistula river within Ukraine, located in the west of Ukraine, is in a zone of sufficient moisture and suffers from floods almost every year. A significant problem of the hydrological study of this basin is the identification of areas with potential significant flood risks, as well as the creation of flood hazard and risk maps. The paper presents the methodological principles and algorithm for using the HEC-RAS software in modeling the flooded territory with the corresponding calculated characteristics of the maximum runoff. The resulting maps of areas with potential significant flood risk (APSFR) in the area of Busk are also presented.