Abstract
AbstractFlash flooding occurs in different hilly regions with circular shaped catchments across Europe, including Romania, when heavy rains or rapid melting of the snow are encountered. Vărbilău is a village in the Subcarpathian hills, susceptible to flash floods. In some situations, roads and buildings are affected. This study aims to analyze the flash flood from the 22nd of July, 2018, compare it with the same phenomena formed at higher and lower flow rates, and determine the impact on settlements and roads. The research is done based on field observations, hydrological data from the Romanian National Institute of Hydrology, Geographic Information System (GIS) database, as well as by processing information in GIS environment (ArcMap 10.2.2) and hydraulic modeling in HEC-RAS 6.2. Data is imported in GIS and prepared for the flooding simulation in HEC-RAS. After the model is obtained based on flow values, the affected buildings and roads are quantified in GIS. The area is prone to flooding. Upstream from the confluence the Slănic valley is much more affected than the valley of Vărbilău because the buildings are in the proximity of the river and the valley is narrow, while downstream from the confluence only two bridges and one county road are affected. The utility of protective levees is presented in the paper, while road accessibility for the emergency intervention authorities registers higher values in the northern part.KeywordsFloodHydraulic modelingSettlementsConfluenceRivers
Published Version
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