Raindrop-induced and wind-driven soil particle transport

A wind tunnel study under wind-driven rains was conducted to determine the combined effect of rain and wind on the rainsplash transport process. The rains driven by horizontal wind velocities of 6, 10 and 12 m s super(-1) were applied to three agricultural soils packed into a 20x55-cm soil pan place...

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Bibliographic Details
Published in:Catena (Giessen) 2002-05, Vol.47 (3), p.227-243
Main Authors: ERPUL, G, NORTON, L. D, GABRIELS, D
Format: Article
Language:English
Subjects:
Bgi / Prodig
Earth sciences
Earth, ocean, space
Exact sciences and technology
Geomorphology
Geomorphology, landform evolution
Physical geography
Slopes
Surficial geology
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Summary:A wind tunnel study under wind-driven rains was conducted to determine the combined effect of rain and wind on the rainsplash transport process. The rains driven by horizontal wind velocities of 6, 10 and 12 m s super(-1) were applied to three agricultural soils packed into a 20x55-cm soil pan placed at both windward and leeward slopes of 4.0 degree , 8.5 degree and 11.3 degree . Transport rates were measured by trapping the splashed particles at set distances in the upslope and downslope directions, respectively, for windward and leeward slopes. Rainsplash transport under wind-driven rains was adequately described (R super(2)=0.93) by relating the transport rate to the rain impact pressure and wind shear velocity by log-linear regression technique. Average trajectory of a raindrop-induced and wind-driven particle was also adequately predicted by the momentum loss per unit time per unit length of travel (u sub(*) super(2)/g). The travel distance is found to be three times greater than the path of a typical saltating sand grain.
ISSN:0341-8162
1872-6887
DOI:10.1016/S0341-8162(01)00182-5