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The Study of Effect of Dredging and Dike Construction on the Flow Hydraulic and Reduction of Flood in Downstream of the River (Case Study: Karun River Downstream Between Ahvaz and Farsyat) Original Article, C27 Monjezi R, Heidarnejad M, Asadi Lor M, Hoseini E. Journal. Civil Eng. Urban. 3(4):170-175. 2013 ABSTRACT:The aim of this study is to simulate a numerical model for flood spreading and to control it in Karoun River in the downstream of Ahvaz to Farsyat which is affected by dredging and the construction of dike. Using the HEC-RAS 4.1 software, one-dimensional flow model in this field was simulated. After entering the data to the model and calibration, the model was run based on selected design flow rates, and water levels were calculated and areas of flood spreading were defined. Then, the mathematical model was run based on the dredging and dike construction. Due to lack of efficiency of dredging operations for flood control and the lack of a suitable location for deflecting flow, the only practical and cost-effective method for controlling the flood of the Karoun River in the studied interval is to construct a dike with designed height. Keywords: Karoun River, Flood, HEC-RAS Model, Dike, Dredging منبع: [Hidden Content] دانلود: [Hidden Content].,27-170-175.pdf J. Civil Eng. Urban.,27-170-175.pdf