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| Impact of Disturbing Modes on Amount of Wind Erosion of Sandy Gobi |
| Yin Daiying, Qu Jianjun, Zu Ruiping, Tan Lihai, An Zhishan, Xiao Jianhua, Gou Qianqian |
| Dunhuang Gobi and Desert Ecology and Environment Research Station/Gansu Center for Sand Hazard Reduction Engineering and Technoogy, Cold and Arid Region Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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Abstract Field wind tunnel experiments were conducted to measure the quantity of wind erosion under different disturbance modes, area of disturbance and wind speeds. Results reveal that the amounts of wind erosion under different disturbance modes are different, the more intensity caused by disturbance, the greater the amount of wind erosion. The amount of wind erosion of the disturbance with continuous space is corresponding with the disturbance at intervals, and it increases exponentially with increasing the area of disturbance and wind speed. When wind speeds are 8-10 m·s-1, wind erosion of gobi surface is relatively slight. However, as wind speed increases to larger than 12 m·s-1, strong wind erosion occurs. The amount of wind erosion under 10-12 m·s-1 is between both above. In addition, the change of sand transport rate with height obeys a exponential polynomial function. Sand particles eroded by wind in the experiments are mainly composed of fine and very fine sands in the 0-20 cm near-surface layer. With the increase of height, the proportion of fine sands keeps steady, very fine sands decreases and median sands increases.
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Received: 18 March 2013
Published: 20 January 2014
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Corresponding Authors:
屈建军，qujianj@lzb.ac.cn
E-mail: qujianj@lzb.ac.cn
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2014, Vol. 34 
