Relation between Wind Erosion Amount and Wind Velocity in Farmland
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.
wind erosionwind velocitysand supply limitationexponential function
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万方数据
维普
