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Geochemistry and solute sources of surface waters of the Tarim River Basin in the extreme arid region, NW Tibetan Plateau
Xiao, J (Xiao, Jun)[1]; Jin, ZD (Jin, Zhang-Dong)[1]; Ding, H (Ding, Hu)[2]; Wang, J (Wang, Jin)[1]; Zhang, F (Zhang, Fei)[1]
2012-08-02
Source PublicationJOURNAL OF ASIAN EARTH SCIENCES
Volume54-55Pages:162-173
Subtype期刊论文
Abstract

Major ion concentrations of river, lake and snow waters were measured to better understand the water quality, hydrochemical processes and solute sources of surface waters within the Tarim River Basin in the extreme arid region. Surface waters are slightly alkaline and are characterized by high total dissolved solids (TDS). TDS values varies over two orders of magnitude from fresh (76%) to brackish (24%) with a mean value of 1000 mg/L, higher than the global river average and river waters draining the Himalayas and the southeastern Tibetan Plateau. Most of the samples were Ca(2+)-(Mg(2+))-HCO(3)(-) type and suited for drinking and irrigation. Water quality of Aksu River (AK), Hotan River (HT) and Northern Rivers (NR) is better than the others. Rock weathering, ion exchange and precipitation are the major hydrogeochemical processes responsible for the solutes in rivers waters. Anthropogenic input to the water chemistry is minor and human activities accelerate increase of river TDS. The quantitative solute sources are first calculated using a forward model in this area. The results show that evaporite dissolution, carbonate weathering, atmospheric input, and silicate weathering contributed 58.3%, 25.7%, 8.7%, and 8.2% of the total dissolved cations for the whole basin. Evaporite dissolution dominated in Lake Waters (LW), HT, Yarkant River (YK), Tarim River (TR), and Southern Rivers (SR), contributing 73.5%, 53.4%, 56.7%, 77%, and 74.2% of the total dissolved cations, respectively. Carbonate weathering dominated in AK and NR, contributing 48% and 44.4% of the total dissolved cations, respectively. The TDS flux of HT, TR, AK, YK was 66.0, 118.6, 134.9, and 170.4 t/km(2)/yr, respectively, higher than most of the rivers in the world. Knowledge of our research can promote effective management of water resources in this desert environment and add new data to global river database.

KeywordTarim River River Water Major Ions Solute Sources Tds Flux
Indexed BySCIE
Language英语
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10123
Collection加速器质谱中心
Corresponding AuthorJin, ZD (Jin, Zhang-Dong)[1]
Affiliation1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China;
2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
Recommended Citation
GB/T 7714
Xiao, J ,Jin, ZD ,Ding, H ,et al. Geochemistry and solute sources of surface waters of the Tarim River Basin in the extreme arid region, NW Tibetan Plateau[J]. JOURNAL OF ASIAN EARTH SCIENCES,2012,54-55:162-173.
APA Xiao, J ,Jin, ZD ,Ding, H ,Wang, J ,&Zhang, F .(2012).Geochemistry and solute sources of surface waters of the Tarim River Basin in the extreme arid region, NW Tibetan Plateau.JOURNAL OF ASIAN EARTH SCIENCES,54-55,162-173.
MLA Xiao, J ,et al."Geochemistry and solute sources of surface waters of the Tarim River Basin in the extreme arid region, NW Tibetan Plateau".JOURNAL OF ASIAN EARTH SCIENCES 54-55(2012):162-173.
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