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Riprap Stability on Channel Slide Slopes

by Stephen T. Maynord, US Army Engineer Waterways, Experiment Station, Vicksburg, MS, USA,
James F. Ruff, US Army Engineer Waterways, Experiment Station, Vicksburg, MS, USA,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

The stability of riprap placed on a sloping bank is decreased because one component of gravity tends to displace the rock down the slope. Results of riprap stability tests on sloping banks show that existing methods overestimate the decrease in stability that occurs when riprap is placed on a slope. Angle of repose was found to vary from the commonly used value of 40 deg (0. 70 rad). Average velocity relations were developed for stability of riprap on a 1V on 2H side slope. Velocity distributions on side slopes in bends and straight reaches differ significantly.

Subject Headings: Slope stability | Riprap | Velocity distribution | River bank stabilization | Channel stabilization | Fluid velocity | Flow measurement

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