Riprap Incipient Motion and Shields' Parameterby Roger T. Kilgore, GKY & Assoc, Springfield, United States,
G. Kenneth Young, GKY & Assoc, Springfield, United States,
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: Riprap | Motion (dynamics) | Parameters (statistics) | Shear stress | Froude number | Stress analysis | Fluid flow | Turbulent flow
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