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| Effect of Sand Source and Shrub Features on Nebkha Morphological Characteristics in Desert Steppe |
| Xie Guoxun1, Luo Weicheng2,3, Zhao Wenzhi2 |
1. Environment Protection and Forestry Bureau of Yanchi County, Yanchi 751100, Ningxia, China;
2. Linze Inland River Basin Research Station/Key Laboratory of Inland River Basin Ecohydrology, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
3. University of China Academy of Sciences, Beijing 100049, China |
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Abstract Nebkha is a typical landscape in arid and semi-arid land, which commonly distributed in the quicksand regions. There are lots of Nitraria tangutorum nebkhas in the quicksand edge of north YanChi country under the desert steppes. This paper studied the effects of sand source and N. tangutorum growth condition on nebkhas morphology characteristics. The results are as follows: the height of N. tangutorum nebkhas in desert steppes were between 0.2-4.8 m, and about 90.05% of them were smaller than 3.0 m; the volume were between 0.11-805.17 m and only about 6.08% of them were bigger than 150 m3; the area were between 0.86-333.3 m2, and about 72.26% of them were under 50 m2. The relationships of long axis and short axis, height and area, height and volume, area and volume can well described with power functions. Area and volume of nebkhas were increased with the increase of nebkhas height. The distance of sand sources significantly affect the distribution characteristics of nebkhas. The growth conditions of N. tangutorum also affect the morphology characteristics of nebkhs, and the heights, areas, volumes of nebkhas were increased with the increase of coverage of N. tangutorum.
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Received: 08 May 2014
Published: 20 May 2015
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2015, Vol. 35 
