| 汾河流域地表水水化学同位素特征及其影响因素 |
| 摘要点击 2156 全文点击 1020 投稿时间：2022-01-12 修订日期：2022-03-11 |
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| 中文关键词 汾河流域 水化学 离子来源 氢氧同位素 地表水 |
| 英文关键词 Fenhe River Basin hydrochemistry ion sources hydrogen and oxygen isotopes surface water |
| 作者 | 单位 | E-mail | | 赵春红 | 中国地质科学院岩溶地质研究所, 自然资源部/广西岩溶动力学重点实验室, 桂林 541004
中国矿业大学环境与测绘学院, 徐州 221116 | zhaochunhong@karst.ac.cn | | 申豪勇 | 中国地质科学院岩溶地质研究所, 自然资源部/广西岩溶动力学重点实验室, 桂林 541004 | | | 王志恒 | 中国地质科学院岩溶地质研究所, 自然资源部/广西岩溶动力学重点实验室, 桂林 541004 | wangzh@karst.ac.cn | | 梁永平 | 中国地质科学院岩溶地质研究所, 自然资源部/广西岩溶动力学重点实验室, 桂林 541004 | | | 赵一 | 中国地质科学院岩溶地质研究所, 自然资源部/广西岩溶动力学重点实验室, 桂林 541004 | | | 谢浩 | 中国地质科学院岩溶地质研究所, 自然资源部/广西岩溶动力学重点实验室, 桂林 541004 | | | 唐春雷 | 中国地质科学院岩溶地质研究所, 自然资源部/广西岩溶动力学重点实验室, 桂林 541004 | |
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| 中文摘要 |
| 汾河是山西的母亲河.由于水资源过度开发及社会经济发展影响，生态环境恶化.经过一系列治理保护措施，水质得到改善.利用统计学、Piper三线图和Gibbs模型等方法，分析了汾河流域地表水水化学和氢氧同位素特征及其来源，揭示了汾河流域地表水水质演化过程.结果表明，汾河干流地表水中主要水化学组分沿着径流路径含量逐渐增加；汾河上游地表水水化学类型主要以HCO3·SO4·Cl-Ca·Na·Mg为主，中游和下游地表水水化学类型主要以SO4·HCO3·Cl-Ca·Na·Mg为主.汾河流域地表水水化学组成主要受岩石风化作用和蒸发结晶作用影响，而降雨影响较小.Na+和K+主要来源于蒸发盐岩的溶解以及周边黄土中含Na矿物溶解，水体中Ca2+、Mg2+和HCO3-主要来源于碳酸盐岩的溶解，SO42-除来源于石膏的溶解，还可能来源于汾河周边黄土层中硫化矿物的溶解.干流地表水δD和δ18 O平均值分别为-62.60‰和-8.42‰，氢氧同位素特征进一步表明其主要受蒸发作用的影响.流域内支流及岩溶水水化学组分差异较大.结果可为汾河流域生态修复保护及生态文明建设提供依据. |
| 英文摘要 |
| 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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