| 升金湖河湖交汇区地表-地下水水化学特征及成因分析 |
| 摘要点击 2341 全文点击 717 投稿时间：2020-12-02 修订日期：2020-12-31 |
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| 中文关键词 升金湖 水化学特征 氢氧稳定同位素 离子成因 河湖交汇区 |
| 英文关键词 Shengjin Lake water chemistry characteristics hydrogen and oxygen stable isotopes ion origin meeting place of lake and river |
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| 中文摘要 |
| 以升金湖河湖交汇区为研究区，测试不同类型水体水化学组成和氢氧同位素值，分析其季节变化特征，探究地表-地下水中化学离子来源，最后估算混合水源对地下水中化学离子的贡献量.结果表明：①研究区地表-地下水主要离子浓度均高于大气降水，理化参数呈现季节变化特征；②地表水以Ca-HCO3类型水为主，且在夏季占比明显高于其他季节，而地下水以Ca-HCO3和Ca-SO4类型水为主，占比分别为46%和27%，且季节差别不显著；③地表-地下水中Ca2+和Mg2+主要来自于碳酸盐岩的溶解，且有碳酸和硫酸参与了碳酸盐矿物溶解的过程，Na+和Cl-除来源于大气降水外，还来源于当地农业施肥和粪便污水；④水源混合也是地下水化学离子的一个重要来源，其对Cl-的贡献率平均达到28%，且呈现季节变化趋势. |
| 英文摘要 |
| The interface between Shengjin Lake and Yangtze River was selected as the study area. The water chemical composition and hydrogen and oxygen isotope values of different types of water bodies were tested, and their seasonal variation characteristics were analyzed to explore the sources of chemical ions in the surface and groundwater. Finally, the contribution of mixed water sources to chemical ions in groundwater was estimated. The results show the following ① The concentration of chemical ions in the surface and groundwater of the study area is higher than that of atmospheric precipitation, and the physical and chemical parameters exhibit seasonal variation. ② Surface water mainly belongs to the Ca-HCO3 type, but the proportion of the Ca-SO4 type in summer is significantly lower than that in other seasons; Groundwater primarily belongs to Ca-HCO3 and Ca-SO4 types, with proportions of 46% and 27%, respectively, and the seasonal difference is not significant. ③ Ca2+ and Mg2+ in the surface and groundwater mainly come from the dissolution of carbonate rocks, carbonic acid and sulfate ions participate in the dissolving process of carbonate minerals. Na+and Cl- are partly derived from atmospheric precipitation and partly sourced from agricultural fertilization and manure sewage. ④ Mixed water sources is also an important source of chemical ions in groundwater, with the average contribution 28% to Cl-, showing a seasonal trend. |
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