Gated Spillways Operation Rules Considering Water Surface Elevation and Flood Peak: Application to Karkheh Dam

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by A. Afshar, Professor; School of Civil Engineering, Iran University of Science & Technology (IUST), Tehran, Iran, P.O. Box: 16675-163.,,
A. Salehi, MSc Student; School of Civil Engineering, Iran University of Science & Technology (IUST), Resalat Sq., Hengam Ave., Daneshgah St., Tehran, Iran, 16844, P.O. Box: 16845-155.,,

Document Type: Proceeding Paper

Part of: World Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainability

Abstract: In this research, a multi-stage operating policy for routing flood hydrographs through reservoir with two different operation policies for gated spillways is presented. The first approach presents releases the flood only based on observed reservoir water surface level. In the second approach, both observed reservoir water surface level and flood peak in upstream gagging station forms the release policy. As a distinct privilege, none of the policies needs flood forecasting making them adaptable to any flood with any return period. In order to demonstrate the performances of the proposed models, we operated the gated spillway of Karkheh reservoir by using flood hydrographs with different return periods. The results of simulation show that the second method out performs the first method and results in smaller flood peak in downstream.

Subject Headings: Water surface | Spillways | Floods | Dams | Reservoirs | Management methods | Flood routing | Rivers and streams | Hydrographs |

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