Stepped Spillway Design for Flow Over Embankments

by Kathleen Houston Frizell, US Bureau of Reclamation, Denver, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


Many embankment dams have been identified as unable to pass their design flows without failure due to overtopping. The U.S. Bureau of Reclamation (Reclamation) is currently at the forefront of pursuing the technology of providing overtopping protection for embankment dams. The major emphasis of Reclamation's research program is to determine the capability of a stepped concrete overlay to protect the embankment from erosion during passage of large design flows. This paper will discuss the test program, laboratory and near-prototype facilities, and the current test results for horizontal steps on a 2:1 slope.

Subject Headings: Embankment dams | Wave overtopping | Spillways | Hydraulic models | Hydraulic design | Laboratory tests | Flow measurement

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