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Solute geochemistry and its sources of the groundwaters in the Qinghai Lake catchment, NW China
Xiao, J (Xiao, Jun)[1]; Jin, ZD (Jin, Zhang Dong)[1]; Zhang, F (Zhang, Fei)[1]; Wang, J (Wang, Jin)[1]
2012-06-30
Source PublicationJOURNAL OF ASIAN EARTH SCIENCES
Volume52Pages:21-30
Subtype期刊论文
Abstract

Major ion compositions were analyzed in 65 groundwater samples to decipher water quality, solute geochemistry and sources of groundwater within the Qinghai Lake catchment, NE Tibetan Plateau. Ground-waters were slightly alkaline with pH varying from 7.2 to 8.7. The total dissolved solids (TDS) varied over two orders of magnitude from fresh (88%) to brackish (12%) with a mean value of 672 mg/L, higher than river waters within the Qinghai Lake catchment and river waters draining the Himalayas and the southeastern Tibetan Plateau. Most of the samples, approximately 80%, were the Ca2+-Mg2+-HCO3- type and suitable for drinking and irrigation. Some of the Lakeside, the Buha and the Qinghai Lake water were the Na+-Cl- type and not suitable for drinking and irrigation. Water quality of Hargai and Shaliu samples was better than the others. Rock weathering, ion exchange and precipitation are the major geochemical processes responsible for the solutes in the groundwater within the Qinghai Lake catchment. Anthropogenic input to the groundwater is minor. The forward models on the input of groundwaters from various sources showed that the contributions were 40.1% for carbonate weathering, 29.0% for evaporite dissolution, 16.8% for atmospheric input and 14.1% for silicate weathering of the total dissolved cations for the whole catchment. Evaporite dissolution was dominating in the Lakeside, the Buha and the Daotang samples, contributing 15.3-45.9%, 20.4-61.1% and 21.3-63.9% of the total dissolved cations. respectively. Carbonate weathering was dominated in the Shaliu and the Hargai samples, contributing 23.9-71.7% and 31.8-95.4% of the total dissolved cations, respectively. The result also demonstrated that carbonate weathering had higher contribution to the groundwaters than silicate weathering.

KeywordSolute Geochemistry Groundwater Water Quality Rock Weathering Qinghai Lake
DOI10.1016/j.jseaes.2012.02.006
Indexed BySCIE
Language英语
Citation statistics
Cited Times:36[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10122
Collection加速器质谱中心
Corresponding AuthorJin, ZD (Jin, Zhang Dong)[1]
AffiliationState Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China
Recommended Citation
GB/T 7714
Xiao, J ,Jin, ZD ,Zhang, F ,et al. Solute geochemistry and its sources of the groundwaters in the Qinghai Lake catchment, NW China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2012,52:21-30.
APA Xiao, J ,Jin, ZD ,Zhang, F ,&Wang, J .(2012).Solute geochemistry and its sources of the groundwaters in the Qinghai Lake catchment, NW China.JOURNAL OF ASIAN EARTH SCIENCES,52,21-30.
MLA Xiao, J ,et al."Solute geochemistry and its sources of the groundwaters in the Qinghai Lake catchment, NW China".JOURNAL OF ASIAN EARTH SCIENCES 52(2012):21-30.
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