| 水文与水资源 |
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| Hydrogeochemical Properties and Evolution of Groundwater from Helan Mountain to Jilantai Salt Lake |
| WEI Guo-xiao1, ZHU Xi-fen1, MA Jin-zhu1, XU Xiang1, XU Tao2 |
| 1.Ministry of Education Key Laboratory of Western China's Environmental System, Lanzhou University, Lanzhou 730000, China; 2.China Yangtze Power Co., Ltd., Yichang 443133, Hubei, China |
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Abstract The PHREEQC software is applied to simulate the groundwater spatial pattern from the Helan Mountain to the Jilantai Salt Lake based on analysis of hydrochemical properties. Results show that groundwater evolves gradually from HCO-3 type to Cl--SO2-4 type and eventually to Cl- type from the front of western Helan Mountain to Jilantai Salt Lake. Correlation between Ca2+, Mg2+ and SO2-4 shows that Ca2+, which dissolved from gypsum, substitutes Mg2+ of MgCO3, so that CaCO3 is produced in the process. The increase of major ions comes from the dissolution of dolomite, gypsum, halite and CO2(g), which is strongly influenced by evaporation and cation exchange process. The deep groundwater have high value of mNa/Cl (2.12) and low value of mCa/Na(0.09), which indicate a dramatic cation exchange process. It is very helpful to the understanding of the water-rock interactions and groundwater evolution in the arid desert zone and Jilantai Salt Lake.
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Received: 22 December 2010
Published: 20 September 2011
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2011, Vol. 31 
