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Considerations for the design of river abstraction works in South Africa
Expanded Title:Many communities abstract water directly from rivers, usually by means of a pump. Due to the highly variable flow conditions and high sediment loads in our rivers, sediment deposition often occurs at the abstraction point. The same applies to larger water diversion & transfer schemes such as on the Olifants River, currently under construction, or the Thukela water diversion schemes which will be constructed in the near future. There are, however, lessons to be learned from serious sedimentation problems experienced at a number of our major transfer schemes, such as the Tienfontein Pump Station on the Caledon River. Slow approach flow velocities at the pumps usually create an area of sediment deposition, which is detrimental to the sustainable use of the pumps, with resulting high pump replacement costs and inefficient operation. The research aims to develop hydraulic guidelines for the layout, design and maintenance of river diversion structures in South Africa to limit the influence of sedimentation. These structures include small pump stations to large hydraulic structures for major water transfer schemes. Specific techniques to be investigated to ensure sustainable operation include hydraulic flushing within the diversion structure (pump station).
Date Published:21/06/2017
Document Type:Research Report
Document Subjects:Water Resource Management/IWRM - Hydrogeology
Document Keywords:Hydrology, Hydropower
Document Format:Report
Document File Type:pdf
Research Report Type:Technical
WRC Report No:TT 260/06
ISBN No:1-77005-411-1
Authors:Basson GR
Project No:K5/1302
Organizations:Ninham Shand Consulting Engineers; University of Stellenbosch
Document Size:47 480 KB
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