Flow Characteristics in an Irregular Spillway Model

by Mary Charlene Scott, Federal Energy Regulatory Commission, United States,
Wesley P. James, Federal Energy Regulatory Commission, United States,

Document Type: Proceeding Paper

Part of: Waterpower '89


A physical model of the spillway for a proposed water supply reservoir near Meridian, Texas, was constructed to determine the optimum spillway design which would maintain an acceptable hydraulic performance. The model was tested for the 10-, 50-, 100-year, and probable maximum flood (PMF) discharges. The study showed that guide vanes, 40 ft long, proved effective in improving the flow distribution and in reducing tailwater velocities. Curved transitions in the chute walls gave a better flow distribution as opposed to straight transitions. The chute was revised from a straight chute on a 20 percent slope to a 11 percent-33 percent broken back chute. Increasing the size of the stilling basin floor blocks and chute blocks improved the model performance.

Subject Headings: Stream channels | Flow distribution | Spillways | Physical models | Hydraulic design | Velocity distribution | Hydraulic models | Hydrologic models | Texas | United States

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