Flood risk modelling of Stuliansky stream in Lopúchov village, Slovakia

Abstract

The paper focuses on the modelling of water flow in open channel of Stuliansky stream in the village Lopúchov, situated in the north of Slovakia. It presents: I) the proceeding of the model development in HEC-RAS; II) the creation of flooded areas in ArcGIS; III) the flood risk assessment by Cost Benefit Analysis (CBA). We will point out the modelling methodology with emphasis to collection of the data and their relevance for flood risk modelling of study area. From the developed model, it is possible to determine the maximum water level in each river profile, the extent of flooding, flow rate, or flow velocity in a particular profile, taking into account the proper Manning roughness coefficient for each profile. The benefit of this work is the definition of flooded area in the municipality Lopúchov in the eastern Slovakia. The 3D model of a given territory is created at Geographical Information System (GIS) platform and it shows the flooded part of the urban area in village Lopúchov, caused by Stuliansky stream. The CBA is essential to evaluate flood damages in the areas. Results from the flow modelling are of great importance for the field of science and practice that their interests are oriented to the proposal of flood mitigation measures in the studied territory.