| 尼洋河流域水化学特征及其控制因素 |
| 摘要点击 5092 全文点击 1439 投稿时间：2017-04-06 修订日期：2017-05-27 |
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| 中文关键词 水化学 主要离子 离子来源 元素比值 化学风化 因子分析 尼洋河 |
| 英文关键词 hydrochemistry major ions ion source element ratios chemical weathering factor analysis Niyang River |
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| 中文摘要 |
| 为研究尼洋河流域水化学特征及其控制因素，2014年先后采集河水7组，井水13组，泉水10组，共计30组水样.综合运用数理统计、Piper三线图、Gibbs模型和离子比等方法，分析了尼洋河流域河水、泉水和井水的水文地球化学特征，并探讨了尼洋河流域的水化学演化规律.结果表明，河水、井水及泉水中阳离子均以Ca2+、Mg2+为主，占阳离子总量的84%以上；阴离子以HCO3-和SO42-为主，占阴离子总量的97%以上； TDS介于79.11~290.48 mg·L-1之间，平均值为165.21 mg·L-1，矿化度较低；水化学类型以HCO3·SO4（SO4·HCO3）-Ca·Mg（Mg·Ca）型水为主；水化学样品均分布在Gibbs模型左中部，说明该流域水化学离子组成受岩石风化作用控制；主成分分析及相关分析表明，尼洋河流域水化学组分受硅酸盐岩的溶解控制，碳酸盐岩的溶解也起到非常重要的作用. |
| 英文摘要 |
| In order to study the hydrochemical characteristics and their possible controls for the chemical composition of the water from the Niyang River Basin, 30 samples were collected from wells, springs, and the river in 2014 and major ion concentrations were measured. Descriptive statistics, the Gibbs figure, an ion ratio, and Piper triangular diagrams were used to investigate the hydrochemical characteristics, influencing factors, and hydrochemical evolution of the water in the basin. The results showed that the major cations in this water were Ca2+ and Mg2+, accounting for more than 84% of cations and the main anions were HCO3- and SO42-, accounting for more than 97% of anions The hydrochemical typology of the water is HCO3·SO4(SO4·HCO3)-Ca·Mg (Mg·Ca). The total dissolved solids (TDS) in the water ranges from 79.11 to 290.48 mg·L-1 with an average of 165.21 mg·L-1. The chemical composition of water samples is located to the left of the Gibbs model, which indicates that the chemical process of Niyang River Basin are controlled by rock weathering. According to the principal component analysis and correlation analysis, the hydrochemical composition is controlled by silicate weathering, however, carbonate weathering also plays an important role. |
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