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Title: Outlet works, Warm Springs Dam, Dry Creek, Russian River basin, Sonoma County, California : hydraulic model investigation
Authors: United States. Army. Corps of Engineers. San Francisco District.
Ables, Jackson H.
Pickering, Glenn A.
Keywords: Hydraulic models
Outlet works
Stilling basins
Warm Springs Dam
Hydraulic structures
Publisher: Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; H-73-3.
Description: Technical Report
Abstract: Tests were conducted on a 1:25-scale model of the outlet works for Warm Springs Dam to determine stilling basin performance and flow conditions in the outlet channel. Uncertainties existed as to the performance of the stilling basin, designed for full pipe flow, with the conduit flowing partially full since the curvature in the conduit could result in unequal distribution of flow at the outlet portal. The model reproduced the control structure, the entire length of the downstream conduit, the energy dissipater with fish channel, exit channel, and a portion of Dry Creek. At partial conduit discharges, distribution of flow at the outlet portal was not sufficiently unbalanced by the curve in the conduit to affect stilling basin action. However, minor revisions were made to the stilling basins that resulted in more efficient energy dissipation. At intermediate discharges, moving pockets of air were entrapped in the downstream portion of the conduit . These pockets of air resulted in slug flow at the outlet portal which created surges that carried through the primary and secondary basins into the exit channel. As a result of model tests, changes were made in the design of the conduit and related features to eliminate the slug flow conditions for critical discharges. The riprap requirements in the exit channel downstream from the energy dissipater were determined. Pertinent data pertaining to the fish collecting facilities were obtained.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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