الفهرس | Only 14 pages are availabe for public view |
Abstract After the construction of the Aswan High Dam, most of the Nile River sediment loads have been deposited in Nasser Lake. In turn, the river almost sediment- free downstream the dam. Local scour and deposition in the Nile River were observed at many locations. Several sources of sediments were developed from wind-blown sands, bank failures, dredging operations, flash floods and the riverbed. There is a problem found in most of the intakes in Nile River especially at power plants that use river water for cooling. These problems are in the form of severe vortices, uneven flow distribution at pump intake and sedimentation problems in front of intakes, as the sediment entering causes blockage of the suction basin and the associated vibration and wearing of the pump impellers. There are several methods in the literature to solve such problems but such methods might have a negative impact on the operation and maintenance of the intake structure. In this research, the baffle column approach was investigated to reduce the amount of sediment entering the intake structures without any adverse impacts on the operation process. This approach depends on installing baffle columns on the top of the upstream side and the offshore long side of the sedimentation basin of the intake structure. The hybrid approach will be used in this research, a physical model of undistorted scale 1:50 in addition to a numerical model are used. The models show that baffle columns are effective in reducing the amount of sediment entering the intake also the optimum design of the. |