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Factors controlling threshold friction velocity in semiarid and arid areas of the United States

Citation

Marticorena, Beatrice, Bergametti, Gilles, Gillette, Dale A, and Belnap, Jayne, Factors controlling threshold friction velocity in semiarid and arid areas of the United States: .

Summary

A physical model was developed to explain threshold friction velocities u*t for particles of the size 60?120 ?m lying on a rough surface in loose soils for semiarid and arid parts of the United States. The model corrected for the effect of momentum absorption by the nonerodible roughness. For loose or disturbed soils the most important parameter that controls u*t is the aerodynamic roughness height z 0. For physical crusts damaged by wind the size of erodible crust pieces is important along with the roughness. The presence of cyanobacteriallichen soil crusts roughens the surface, and the biological fibrous growth aggregates soil particles. Only undisturbed sandy soils and disturbed soils of all types would be expected to be erodible [...]

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  • Upper Colorado River Basin

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From Source - Mendeley RIS Export <br> On - Wed Sep 19 08:08:31 MDT 2012

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Type Scheme Key
UniqueIdentifier ISBN doi:10.1029/97JD01303

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