Simulation of flow pattern in a natural meander range using CCHE2D hydrodynamic model (Case Study: Meanders in Upstream of Droodzan Dam)

Investigation of flow pattern in river especially intervals location erodibleit is of utmost importance. Due to the complex process of erosion and sedimentation in meanders and the importance of the flow velocity and shear stress forces on the river bank erosion, two-dimensional numerical model as CCHE2D to simulation of flow pattern of water in the range of natural meanders River Kor between Bridge Abbas abad and Droodzan Dam, Fars province was used. In this study, using large-scale topographic maps of Study area, the first model geometry and computational grid with various aspects of the preparation and finally, based flow measurement specifications, two-dimensional hydrodynamic model average depth, run and results such as changes in the depth and velocity were calculated. From two statistical criteria RMSE and MAPE to compare data from numerical model simulations and observational data were used, the error model to velocity and depth, RMSE index, respectively, 0.027, 0.13 and MAPE index, 0.51 and 0.65 percent were estimated. The results showed that, the model to predict speed and flow depth particularly in the arc of territory had studied appropriate accuracy and simulated data with measured data have many similarities.