INNOVATIVE REREGULATION WEIRS

The article describes how, as part of its commitment to improving the quality of its rivers, the Tennessee Valley Authority has funded innovative weir design and construction. One of its projects safely provides a sustained minimum flow below a major hydroproject, another reoxygenates released water and sustains a minimum flow that will help bring miles of river back to life. Two distinct funtional designs with distinct purposes were developed. One is a timber-crib weir for minimum flow, and the other a wood-and-concrete labyrinth weir for minimm flow and aeration. Neither was designed to regulate maximum flow, but by creating a weir pool with sufficient storage capacity, a weir can flatten a short-term surge of water by forcing it to fill the weir reservoir first. In addition, within the weir pool, high water velocities associated with hydrogeneration are reduced. The design steps are described, and the advantages and disadvantages of the weirs are noted.

Media Info

Subject/Index Terms

  • TRT Terms: Construction; Design; Weirs
  • Subject Areas: Construction; Design; Highways; Hydraulics and Hydrology; I26: Water Run-off - Freeze-thaw;

Filing Info

  • Accession Number: 00621865
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 31 1992 12:00AM