Design Considerations for Use of Wedge Wire Screens at Surface Water Intake Structures

by Mahmood Naghash, Bechtel Corp, Gaithersburg, United States,
Adnan M. Alsaffar, Bechtel Corp, Gaithersburg, United States,

Abstract: This paper provides the suggested guidelines for design, construction, operation and maintenance of wedge-shaped wire cylindrical screens used for aquatic biota and trash and debris screening at surface water intake structures. The guidelines include: proper application of the screen slot size, the optimum screen flow-through velocity, effect of water-level variations, hydraulics of the screen, preferred design concepts, screen cleaning mechanism, and problems limiting the operation and maintenance of screens, and methods for minimizing their effect.

Subject Headings: Water intakes | Surface water | Maintenance | Fluid velocity | Water level | Hydraulic design | Wedges | Construction management

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