Sediment Characteristics Of Water Supply Pumping Stations Along The Yellow River And Design Optimization Of Periodic Flushing Desilting Basin

As for water pumping stations from the sediment-laden river or channel, Silt content have a significant effect according to the pump operating parameters, and will also lead to wear of the pumps.siltation also occurs in the forebays of water pumping station、outlet sumps and channels. Therefore, in the planning and the design of such a pump station, the sediment problems should be handling. Otherwise, the operation, maintenance and management of the future will cause great difficulties.Sediment has been more prominent problem of water supply pumping stations along the Yellow River。This paper combines the pumping station sediment characteristics, sediment pumping station, sediment pumping station hazards, control measures, focusing on water supply pumping stations along the Yellow River on a periodic flushing desilting basin optimization design study.The periodic flushing desilting basin is a hydraulic scouring basin, for the settlement of sediment-laden flow greater than the design sedimentation particle size of suspended sediment, reduce the pump sediment concentration of buildings.The paper is to optimize the design of water supply pumping stations along the Yellow River sediment characteristics and regularly scouring basin, the main contents are:1.The paper discussed the the traditional sediment model calculations and the design method of settling basin. Sediment concentration and its particle size distribution into the basin,sediment deposition calculations,the flood season density current desilting calculated,sediment flushing calculated. The main the traditional flushing desilting basin design content:the desilting basin size layout and size of the design, structure design, operational design.2. Based on the traditional sediment model calculations and the design method of desilting basin, sediment concentration to determine the design into the basin, and a basin sediment concentration determined, the desilting basin surface line calculation as well as the density current desilting calculated to make improvements.3.Xue Jia Ping Irrigation Works Liulin County, Shanxi Province, as an engineering example, periodic flushing desilting basin is calculated, through Visual Basic language calculation procedures, to simplify the calculation of regularly deposition and flushing sediment of desilting basin.The main conclusions are as follows:1.Based on traditional open channel water surface model optimization and considering the base slope i calculation accuracy, water surface of periodic flushing desilting basin applied regularly more reasonable, This is the main innovation of the paper.2.Density flow would be occur in the flood season.if not immediately removed, desiting basin will soon fill up, calculating the density current to reach the end of the working segment time can grasp flushing time, can also reduce the washing costs, conserve water resources.3.Based on the periodic flushing desilting basin optimization and improvement of the traditional method, the paper developed a computer program that has the calculated sediment deposition basic functions. The program in the desilting basin calculation in Xue Jia Ping irrigation engineering,Liulin County,Shanxi Province can be achieved under various conditions,sediment different periods,different cisternal segment of the Sedimentation rates and sediment thickness calculation, it optimizes the calculation of the desilting basin.The current program design is not intelligent enough,and settling calculated only for a particular project settling basin. Improvement and development of universal desilting basin computer program will be the direction of future efforts.