The Surface Aeolian-sand Flow Structure in the Northeastern Margin of the Ulanbuh Desert

doi:10.7522/j.issn.1000-694X.2014.00096

JOURNAL OF DESERT RESEARCH

2014, Vol. 34

Issue (5): 1200-1207 DOI: 10.7522/j.issn.1000-694X.2014.00096

The Surface Aeolian-sand Flow Structure in the Northeastern Margin of the Ulanbuh Desert

Liu Fang, Hao Yuguang, Xin Zhiming, Chen Hailing, Xu Jun, Zhao Yingming

Experimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou 015200, Inner Mongolia, China

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Abstract Based on long time monitoring data at Dengkou Desert Ecology Station and observation data from various of sand traps in 2011, aeolian-sand flow structure at 0～100 cm is analyzed over five typical types of underlying surface which include moving dune, Artemisia ordosica semi-fixed dune, Nitraria tanqutorum semi-fixed dune, Artemisia ordosica fixed dune and Nitraria tanqutorum fixed dune in northeastern margin of the Ulanbuh Desert. The results show: (1) The sand transport rate(q) decreases with the increase of height (h) in power function q=a×h^-b(R²≥0.8409), and increases with the increase of wind velocity (v) in power function q=av^b, (R²≥0.9256); The sand transport flux in 0-10 cm accounts for 42.8%-70.7%, and the sand transport flux in 0-30 cm accounts for 67.6%-90.0%. When vegetation coverage is 40%, sand transport rate is 6.6% of moving dune with no vegetation cover, and surface wind erosion can be effectively prevented.(2) Sand materials mainly are composed of fine sand and very fine sand (50-250 μm). Wind erosion sand grain size composition at each height follows unimodal distribution, and the peak is between 100-250 μm. With the increase of height, wind erosion sand grain size range become more narrow, and grain size become more fine. (3) The driving-sand wind direction concentrates at WNW and NW accounting for 53.19%. The directional distribution of saltation aeolian-sand flow and creep aeolian-sand flow should be almost the same in theory, and differences are mainly caused by directions of wind intensity and duration.

Key words: aeolian-sand flow structure sand transport rate grain size Ulanbuh Desert

Received: 16 December 2013 Published: 20 September 2014

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Corresponding Authors: 郝玉光（Email：hyuguang@163.com） E-mail: hyuguang@163.com



	Articles by authors
	Hao Yuguang
	Liu Fang
	Xin Zhiming
	Chen Hailing
	Xu Jun
	Zhao Yingming

Cite this article:

Liu Fang, Hao Yuguang, Xin Zhiming, Chen Hailing, Xu Jun, Zhao Yingming. The Surface Aeolian-sand Flow Structure in the Northeastern Margin of the Ulanbuh Desert. JOURNAL OF DESERT RESEARCH, 2014, 34(5): 1200-1207.

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http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2014.00096 OR http://www.desert.ac.cn/EN/Y2014/V34/I5/1200

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