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Riprap Incipient Motion and Shields' Parameter

by Roger T. Kilgore, GKY & Assoc, Springfield, United States,
G. Kenneth Young, GKY & Assoc, Springfield, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

Unobstructed incipient motion data from a variety of sources are compiled to re-examine current thinking regarding riprap stability. Shields' framework is investigated and relationships are proposed between Froude number and Shields' parameter. Such relationships suggest that current methodologies result in over-sized riprap when flow fields are at or above Froude number of 0.8.

Subject Headings: Shear stress | Riprap | Motion (dynamics) | Fluid flow | Parameters (statistics) | Froude number | Turbulent flow

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