In order to reveal sand moisture content, water movement and balance of the Tengger Desert, the moisture content of different types of dunes in Minqin and Zhongwei was studied. The results show that the spatial variation of sand moisture content is remarkable. The layered structure is clear in vertical direction while the moisture content of mobile dune is higher than that of half-fixed dune and fixed dune in horizontal direction, and the moisture content of southeastern edge of the desert is higher than that of southwestern. The phenomena, which the higher moisture content lies the upper part in Minqin and above capillary water sand layer in Zhongwei, indicate the sand moisture mainly comes from meteoric water. The moisture form is mainly film water in this area. There is high moisture content of film water in the southeastern edge of the Tengger Desert, which has more precipitation. The characteristic of sand moisture is special positive equilibrium, which is defined by water physical properties of sand layer. It can correctly explain why there are many lakes and abundant groundwater in the extreme dry desert. This paper also presents two modes of water movement.
ZHAO Jing-bo, XING Shan, SHAO Tian-jie, DONG Zhi-bao, YU Ke-ke, YUE Ying-li, CHEN Bao-qun
. A Study on Content and Balance of Moisture in the Southern Tengger Desert[J]. JOURNAL OF NATURAL RESOURCES, 2012
, 27(3)
: 480
-488
.
DOI: 10.11849/zrzyxb.2012.03.014
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