Loose Riprap Grade Control Structure Design

by Charles H. Tate, Jr., US Army Engineer Waterways, Experiment Station, Vicksburg, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

The Soil Conservation Service has been using loose riprap grade control structures based on the equal energy concept for several years with mixed success. Previous model studies resulted in modifying the design criteria to include a 1:16-exit flare at the downstream end of the structure which resulted in a much longer structure with associated higher construction costs. This study developed a new design criteria for loose riprap drop structures that incorporates recent advances in riprap stability research, numerical backwater codes, and hydraulic model study results.

Subject Headings: Hydraulic structures | Hydraulic models | Erosion | Drop structures | Riprap | Structural control | Hydraulic design

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