Abstract
In this study, the flooding resulting from the potential failure of Sefid-Roud Dam, Iran was examined. Using a United Sates Army Corps of Engineers (USACE) Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model, predictions were made of flood-inundated areas, flood velocity, travel time, and discharge resulting from a break of Sefid-Roud Dam. Results showed that the communities with a combined population of 3100 are at high flood risk. Inundation levels would vary from 2 to 25m and velocities from 4 to 11m/s. Thus in these areas it is highly likely that all properties and infrastructure would be destroyed. The flood wave travel time would be too short for evacuation of these areas. Shear stress within the simulated floodwaters would be very high and thus flooding is highly likely to cause heavy erosion and morphological change in Sefid-Roud River, and erosion of the fertile soils that exist on the surrounding floodplains, causing detrimental impacts on water quality, aquatic biology, and agricultural productivity. Overall, the presented modeling results play a key role in future flood management and risk analysis in the Giulan province in Iran since the area is identified to be at potential risk from failure of Sefid-Roud Dam.
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