Acta Geographica Sinica ›› 2013, Vol. 68 ›› Issue (1): 36-44.doi: 10.11821/xb201301006

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Spatial variation and its causes of water chemical property in Yamzhog Yumco Basin, South Tibet

SUN Rui1,2, ZHANG Xueqin1, ZHENG Du1   

  1. 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2012-05-10 Revised:2012-10-12 Online:2013-01-20 Published:2013-03-19
  • Supported by:

    National Natural Science Foundation of China, No.41171062; No.40871044

Abstract: Due to the special geographical environment, the water chemical property and its spatial-temporal change over the Qinghai-Tibetan Plateau is significant to clarify the chemical characteristics of natural water. Hence, a large number of water samples were collected and their chemical parameters were measured from major lakes, rivers and wells in the Yamzhog Yumco Basin, South Tibet. And then the spatial variation of water chemical property and its possible causes were analyzed. The results revealed that the spatial variation of water chemical property was obvious, which might be attributed to the major influence of natural processes and minor impact of human activities. And the detailed results suggested that (1) owing to the outflows existing for Kongmu Co and Puma Yumco, the values of chemical parameters in the two lakes were much lower than those in the other three enclosed lakes (i. e., Yamzhog Yumco, Bajiu Co and Chen Co), (2) the high boron (B) and lithium (Li) concentrations indicated that there might be some boron minerals and magnesites in the southwestern part of the Yamzhog Yumco lake basin, (3) it is the disparate geologic conditions that cause the river water chemical property significantly different from the western and eastern parts which the river flows through, and (4) the drainage distribution could account for the significant differences of the well water chemical property between the southern and northern lake banks of the Yamzhog Yumco.

Key words: water chemical property, geology, hydrological condition, Yamzhog Yumco Basin