Author(s): Martina Carlino; Silvia Di Francesco
Linked Author(s):
Keywords: Flood modeling; Hydraulic risk; River crossings
Abstract: In the present work, a 1D-2D-coupled model was used to perform hydraulic analysis of Gornalunga River (Sicily), in order to estimate and analyse the flood risk in correspondence of a crossing bridge. In the frame of the project “Speed up of the railway line Catania-Syracuse”, an existing bridge, crossing Gornalunga river, has to be enlarged and a configuration that mitigates the hydraulic risk on the surrounding area has to be found. At this aim, two different future configurations were considered and a flood modelling study in proximity of the railway crossing in existing and future configurations was conducted using MIKE FLOOD. Depths of flowing water through the bridge, as well as the maximum flood extent and maximum inundation depth have been evaluated for each scenario in order to identify the configuration that minimizes the hydraulic risk for the surrounding area. Finally, the effectiveness of this last solution is analyzed and discussed by comparison with the actual configuration. Simulation results demonstrate that in proximity of the railway bridge water level, as well the hazard risk of the surrounding area decrease passing from the actual configuration to the future one.
Year: 2018