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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (3): 642-648    DOI: 10.7522/j.issn.1000-694X.2013.00092
Desert and Desertification     
Spatial Characteristics of Grain Size and Its Environmental Implication in the Badain Jaran Desert
NING Kai, LI Zhuo-lun,WANG Nai-ang, SUN Jian-wei, SHAO Wan-wan
College of Earth and Environment Science/Center for Climate Change and Hydrologic Cycle in Arid Region, Lanzhou University,Lanzhou 730000, China
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Abstract  

The analysis on the surface sand grain size at flat sandy land and inter-dune sandy land in the Badian Jaran desert shows that the average median diameter of the surface sand in the Badian Jaran Desert is 0.45 mm,and the average mean diameter is 0.53 mm,which indicate that the Badian Jaran Desert is one of the deserts with the coarsest grain. On the whole, the diameter of the sand becomes gradually shorter from the north to the south in the Badian Jaran Desert, with a slight increase at the Mount Yabulai located in the south edge of the desert. The content of the coarse sand (0.5-2.0 mm) is the highest (35%) on the average and show a tendency of becoming less from the north to the south, along with a rebound in the south. Medium sand(0.25-0.50 mm) and fine sand (0.10-0.25 mm) are the main components of the moving dunes, and their average content occupies more than half of the total amount and increases from the north to the south within the desert generally. The frequency distribution curve of the sand grain size reveals a transition from multi-peak to double peak, and a gradual decrease in the modal particle from the north to the south within the desert. The results show that the main component of the surface sand in the Badian Jaran Desert is eolian sand, and the sand is mainly derived from the lake sedimentary area in the north of the desert as well as the Gobi which is located further in the north, and some sand is provided by the hills in the north of the desert the Yabulai Mountain.

Key words:  Badain Jaran Desert      grain size      dynamic conditions      aeolian sand     
Received:  19 January 2012      Published:  12 March 2012
ZTFLH:  P931.3  

Cite this article: 

NING Kai, LI Zhuo-lun,WANG Nai-ang, SUN Jian-wei, SHAO Wan-wan. Spatial Characteristics of Grain Size and Its Environmental Implication in the Badain Jaran Desert. JOURNAL OF DESERT RESEARCH, 2013, 33(3): 642-648.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00092     OR     http://www.desert.ac.cn/EN/Y2013/V33/I3/642

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