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| Relation between Wind Erosion Amount and Wind Velocity in Farmland |
| Wang Rende1, Xiao Dengpan1, Chang Chunping2, Guo Zhongling2 |
1. Hebei Engineering Research Center for Geographic Information Application,Institute of Geographical Sciences, Hebei Academy of Sciences, Shijiazhuang 050011, China;
2. College of Resource and Environment Sciences/Hebei Key Laboratory of Environmental Change and Ecological Construction, Hebei Normal University, Shijiazhuang 050024, China |
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Abstract The relation between soil loss by wind erosion and wind velocity in farmland was studied in the paper by long-term field observation and wind tunnel simulation. The results showed that the sand transport rate and wind erosion intensity both followed the exponential function with wind velocity increasing, which was the same with that getting in farmland and grassland by others using indoor wind tunnel simulation or situ testing of field wind tunnel, but it followed the power function in desert. Therefore, it was a common phenomenon that the soil loss by wind erosion followed the exponential function with wind velocity increasing in farmland and grassland and it followed the power function in desert. The difference in sand supply ability among different land types caused by the difference in erosion resisting factors of topsoil and surface roughness factors may be the main reason that led to the difference in changing laws of soil loss by wind erosion with wind velocity among the farmland, grassland and desert. It possibly reflected the case of sand supply limitation that the variation of wind erosion amount with wind velocity followed the exponential function in farmland and grassland, and it may reflect the case of sand supply unlimited that the variation of wind erosion amount with wind velocity followed the power function in desert.
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Received: 29 August 2014
Published: 20 September 2015
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2015, Vol. 35 
