Scour Downstream of High Level Emergency Spillways

by Noel R. Oswalt, USAE Waterways Experiment Station, Vicksburg, MS, USA,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


The Corps of Engineers has numerous high level emergency spillways (HLES) including some that have the potential for excessive scour downstream during certain flow events. 'Excessive Scour' refers to scour that threatens the safety of the spillway. Laboratory demonstrations of headcutting at the U. S. Army Engineer Waterways Experiment Station (WES) Hydraulics Laboratory during 1986 were used to study methods of preventing excessive scour under the U. S. Army Corps of Engineers Repair, Evaluation, Maintenance, and Rehabilitation (REMR) Program. Both structural and operational options were suggested for existing projects that were determined to have potential for excessive scour.

Subject Headings: Laboratory tests | Scour | Rivers and streams | Emergency management | Spillways | United States Army Corps of Engineers | Drop structures | Potential flow

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