On the Erodibility of Rock and Other Earth Materials

by George W. Annandale, (M.ASCE), HDR Engineering, El Dorado Hills, United States,
Hendrik A. D. Kirsten, HDR Engineering, El Dorado Hills, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


An outline of a new method to determine the erodibility of rock and other earth and engineered earth material is presented. The method quantifies the relative capacity of the boundary to resist the erosive power of water by means of a geomechanical index, and expresses the relative magnitude of the erosive power of flow as the rate of energy dissipation. The erodibility of rock at the base of bridge piers can be estimated by making use of a preliminary method to estimate the rate of energy dissipation around bridge piers.

Subject Headings: Erosion | Hydro power | Soil water | Soil analysis | Rocks | Piers | Flow measurement

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