青藏高原淡水湖泊水化学组成特征及其演化

青藏高原淡水湖具有高生态价值和高脆弱性并存的特点.以海拔5 080 m±10 m的打加芒错湖水为研究对象,测试及分析了湖水化学组分,探讨了其主要离子来源、控制因子和湖泊水化学演化趋势.结果表明,湖水阳离子以Ca2+和Na+为主,阴离子以HCO3-为主,为HCO3-Ca型水;TDS为71.2~199.8 mg·L-1,矿化度低;受地表径流的稀释作用和富铝贫钙的地质背景约束湖区东南部水体的EC、Ca2+和HCO3-浓度均较低.湖水的Na+/(Na++Ca2+)为0.08~0.75,Cl-/(Cl-+HCO3-)为0.11~0.35,Ca/Na值为0.58,Mg/Ca值为0.12,HCO3/Na值为...

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Volume: 34
Main Author: 王鹏 尚英男 沈立成 伍坤宇 肖琼
Format: Journal Article
Language: Chinese
Place of publication: 2013
published in: Huanjing kexue Vol. 34; no. 3; pp. 874 - 881
Data of publication: 2013
ISSN: 0250-3301
Alternate Title: Characteristics and Evolution of Hydrochemical Compositions of Freshwater Lake in Tibetan Plateau
Discipline: Engineering
Bibliography: 11-1895/X
WANG Peng , SHANG Ying-nan , SHEN Li-cheng , WU Kun-yu , XIAO Qiong ( 1. Key Laboratory of the Three Gorges Reservoir Region's Eco-environments (MOE) , School of Geographical Science, Southwest University, Chongqing 400715, China; 2. Chengdu Academy of Environmental Sciences, Chengdu 610072, China)
Freshwater lake of the Tibetan plateau has great ecological value and extreme vulnerability. The water samples have been collected in Daggyaima Co at an altitude of 5 080 m ± 10 m. This study has investigated the sources, the major controlling factors of the major ions, and hydroehemieal evolution trend according to the hydrochemical composition of water samples. The results showed that the major cations and anion of lake water were Ca2+ , Na+ and HCO3- , respectively, and the hydrocbemical type was HCO3-Ca, The total dissolved solid (TDS) was in the range of 71.2-199.8 mg.L-l. The concentrations of EC, Ca2+ and HCO3- in water samples from Southeast areas were relatively low resulted from the rich aluminum
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