Flow and Sediment Assessment in a cut off Meander of karun River using CCHE2D Model

Rivers are the main sources of water for various uses, so consideration of the hydraulic conditions and sedimention is of great importance and necessity to completely investigation. According to complex process of erosion and sedimentation of rivers and river morphology changes in organization design of flood control and design of hydraulic structures, it is necessary to recognize of river characteristics. Karun River in Khuzestan province has meander patterns and also according to the formation of islands and sedimentation of the river within Ahvaz, floods occurred with an increasing in water level. In this study, two-dimensional CCHE2D software use to assuming to cut off the meander in choniebeh and Krishan 2. Results of simulation show that by eliminating of Meanders, Caused to increase the slope of the river and velocity of flow in and thereby increasing power of erosion. According to the model predicted average velocity of flow increased by 50% compared to the existing path, which reduces the deposition in river will be 40%.