Model investigations of the outlet works for Branched Oak and Cottonwood Springs Dams were primarily concerned with hydraulic operating characteristics over a wide range of heads. Although the structures were similar in design and purpose, geometric differences required the use of separate model studies, which were conducted with 1:10-scale models that reproduced portions of the approach area, the intake structure, and the outlet conduit. The Branched Oak model also reproduced an SAF impact-type stilling basin and downstream exit channel. Both models indicated undesirable flow characteristics such as nappe flutter, sloshing, and gulping which tended to vibrate the structures. Tests indicated that the flutter could be eliminated by rounding the weir crests; the nappe sloshing could be eliminated by providing a divider-wall between and parallel to the weir crests; and the gulping beneath the cover plate eliminated by placing the cover plate at an elevation above that of the upper pool when the conduit begins to control flow. Performance of the original design SAF basin was satisfactory and the height of the basin training walls was sufficient to prevent overtopping. The exit channel was sloped downward and expanded laterally to permit dissipation of excess energy in turbulence rather than direct attack of channel boundaries. A riprap plan of protection was developed for the recommended exit channel configuration.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Outlet Works for Branched Oak and Cottonwood Springs Dams, Oak Creek, Nebraska, and Cottonwood Springs Creek, South Dakota: Hydraulic Model Investigation



    Erschienen in:

    Erscheinungsdatum :

    1972


    Format / Umfang :

    7081524


    Medientyp :

    Report


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :


    Dutch Gulch Outlet Works, Cottonwood Creek, California: Hydraulic Model Investigation

    Davis, W. Glenn | HENRY – Bundesanstalt für Wasserbau (BAW) | 1989

    Freier Zugriff

    Outlet Works, Warm Springs Dam, Dry Creek, Russian River Basin, Sonoma County, California: Hydraulic Model Investigation

    Ables, Jackson H. Jr. / Pickering, Glenn A. | HENRY – Bundesanstalt für Wasserbau (BAW) | 1973

    Freier Zugriff

    Outlet Works for Site 16, Papillion Creek and Tributaries, Nebraska: Hydraulic Model Investigation

    Fletcher, Bobby P. | HENRY – Bundesanstalt für Wasserbau (BAW) | 1973

    Freier Zugriff

    Outlet Works for Beltzville Dam, Pohopoco Creek, Pennsylvania: Hydraulic Model Investigation

    Melsheimer, Edwin S. | HENRY – Bundesanstalt für Wasserbau (BAW) | 1969

    Freier Zugriff

    Water Quality Outlet Works Prototype Tests, Warm Springs Dam, Dry Creek, Russian River Basin, Sonoma County, California

    Fagerburg, Timothy L. / Price, Richard E. / Howington, Stacy E. | HENRY – Bundesanstalt für Wasserbau (BAW) | 1989

    Freier Zugriff