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Detailed Reference Information |
Shao, Y. and Lu, H. (2000). A simple expression for wind erosion threshold friction velocity. Journal of Geophysical Research 105: doi: 10.1029/2000JD900304. issn: 0148-0227. |
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Threshold friction velocity u*t is the friction velocity at which wind erosion is initiated. While u*t is affected by a range of surface and soil properties, it is a function of particle size only for idealized soils. In this paper we present a simple expression for u*t for spherical particles loosely spread over a dry and bare surface. In this expression we consider the balance between the driving forces (aerodynamic drag and lift) and the retarding forces (cohesion and gravity) and assume that the cohesive force is proportional to particle size. It is found that u*t can be expressed as Y1d+Y21/d, with Y1 and Y2 being empirical constants. The new expression is both simple and effective. ¿ 2000 American Geophysical Union |
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Abstract |
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Keywords
Hydrology, Erosion and sedimentation, Atmospheric Composition and Structure, Aerosols and particles (0345, 4801), Meteorology and Atmospheric Dynamics, Land/atmosphere interactions, Planetology, Solid Surface Planets, Erosion and weathering |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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