INVESTIGATION OF EPI STRUCTURE IN FRONTAL OF INTAKES ON DIVERSION FLOW IN RIVER BEND WITH CCHE2D MODEL

Rivers have long been regarded as one of the mosi important water supplies to human beings, since the major civilizations of human beings were formed near rivers to take advantage of the water's blessings. Along with the water, rivers carry sediment, which is created by erosion of the riverbed and erosion caused by rainfall or surface runoff flowing over the catchment area. Groins are simple hydraulic components that are used for organizing bends in rivers or directing them in some other way and to control erosion and protect the shoreline. In this project, CCHE2D software was used to prepare a numerical model of flow patterns around an Epi in a setting with one simple groin related to the flow direction of frontal intake in a 90-degree bend. Such a bend causes vortex flow around the groin to add to the entry of the water intake, which would make new challenges. In this study, simulation of the discharge and groin structure input into these intakes was investigated to analyze and evaluate the hydraulic conditions of flow in an intake with different locations of 45, 60, 75 degree of bend and that has a sinusoidal-like turn. In addition, the variation of various parameters, such as velocity, Froude number, shear stress, river bed elevation, and total discharge of the river were calculated and discussed. The impact of these different locations on hydraulic flow was studied. The results of these tests indicated that an intake with Epi can improve the flow patterns at the inlet.