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Vegetal Protection of Embankments and Spillways

by Darrel M. Temple, USDA, Stillwater, OK, USA,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

Recent advances in the application of tractive stress to the design of grass-lined open channels are used to develop a tentative procedure for analyzing the hydraulic performance of vegetated earth embankments and spillways. The iterative procedure couples a simple soil detachment rate model with the vegetal flow resistance and effective tractive stress relations. Provision is made for flow and stress concentrations associated with local decay of the vegetal protection during the erosion process. Limitations of the approach and areas needing further research and/or verifying field data are discussed.

Subject Headings: Spillways | Vegetation | Open channels | Erosion | Embankment dams | Soil stress | Mathematical models

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