[汾河流域地表水水化学、同位素特征及其影响因素]。

Chun-Hong Zhao, Hao-Yong Shen, Zhi-Heng Wang, Yong-Ping Liang, Yi Zhao, Hao Xie, Chun-Lei Tang
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引用次数: 1

摘要

汾河流域是山西省的母亲河。由于水资源的过度开发和社会经济发展的影响,生态环境恶化。经过一系列的处理和保护措施,水质得到了改善。采用数理统计、Piper图、Gibbs模型、氢氧同位素等方法分析了汾河流域地表水水化学特征及其来源,揭示了汾河流域地表水水质的演化过程。结果表明:汾河流域干流地表水主要水化学成分含量沿径流路径逐渐增加;汾河流域地表水水化学类型主要为HCO3·SO4·Cl-Ca·Na·Mg和SO4·HCO3·Cl-Ca·Na·Mg。盆地内支流和岩溶水的水化学成分差异较大。盆地内各支流的水化学成分也存在较大差异。岩溶地表水水化学类型以SO4·HCO3-Ca·Mg为主。汾河流域地表水的水化学组成主要受岩石风化和蒸发结晶的影响,而降雨的影响较小。Na+和K+主要来源于周围黄土中含Na的蒸发盐岩的溶蚀作用。Ca2+、Mg2+和HCO3-主要来自碳酸盐岩的溶蚀作用。SO42-除了石膏的溶解作用外,还可能来自汾河周围黄土中硫化物矿物的溶解作用。汾河地表水δD和δ18O值由上游向下游逐渐富集。氢、氧同位素特征进一步表明地表水主要受蒸发作用的影响。研究结果可为汾河流域生态恢复与保护和生态文明建设提供依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
[Hydrochemical and Isotopic Characteristics in the Surface Water of the Fenhe River Basin and Influence Factors].

The Fenhe River Basin is the mother river of Shanxi Province. Due to the over-exploitation of water resources and the impact of social and economic development, the ecological environment has deteriorated. After a series of treatment and protection measures, the water quality has since been improved. Mathematical statistics, Piper diagrams, Gibbs model, hydrogen and oxygen isotopes, and other methods were used to analyze the characteristics and sources of hydrochemistry in the surface water of the Fenhe River basin, which revealed the evolution process of surface water quality of the Fenhe River basin. The results showed that the content of the main hydrochemical components in the main stream surface water of Fenhe River basin increased gradually along the runoff path. The hydrochemical types of surface water of Fenhe River basin were mainly HCO3·SO4·Cl-Ca·Na·Mg and SO4·HCO3·Cl-Ca·Na·Mg. There were great differences in hydrochemical components of tributaries and karst water in the basin. There were also great differences in hydrochemical components of tributaries in the basin. The hydrochemical types of surface water of karst water were mainly SO4·HCO3-Ca·Mg. The hydrochemical composition of surface water in Fenhe River basin was mainly affected by rock weathering and evaporation crystallization, whereas rainfall had little effect. Na+ and K+ mainly came from the dissolution of evaporated salt rocks with Na in the surrounding loess. Ca2+, Mg2+, and HCO3- mainly came from the dissolution of carbonate rocks. SO42- may have also come from the dissolution of sulfide minerals in the loess layer around Fenhe River in addition to the dissolution of gypsum. The values of δD and δ18O of Fenhe River surface water were gradually enriched from upstream to downstream. The characteristics of hydrogen and oxygen isotopes further showed that the surface water was mainly affected by evaporation. The results of this study can provide evidence for ecological restoration and protection and ecological civilization construction in the Fenhe River basin.

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