| 黄河流域内蒙古段水化学同位素特征及水体转化关系 |
| 摘要点击 1328 全文点击 378 投稿时间：2022-10-15 修订日期：2022-11-30 |
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| 中文关键词 黄河流域 水化学特征 氢氧同位素 MixSIAR模型 地下水 |
| 英文关键词 Yellow River Basin hydrochemical characteristic hydrogen and oxygen isotopes MixSIAR model groundwater |
| 作者 | 单位 | E-mail | | 裴森森 | 内蒙古农业大学水利与土木建筑工程学院, 呼和浩特 010018 | pss866@vip.qq.com | | 段利民 | 内蒙古农业大学水利与土木建筑工程学院, 呼和浩特 010018
内蒙古自治区水资源保护与利用重点实验室, 呼和浩特 010018
黄河流域内蒙段水资源与水环境综合治理协同创新中心, 呼和浩特 010018 | duanlimin820116@163.com | | 苗平 | 鄂尔多斯市河湖保护中心, 鄂尔多斯 017010 | | | 潘浩 | 内蒙古农业大学水利与土木建筑工程学院, 呼和浩特 010018 | | | 崔彩琪 | 内蒙古农业大学水利与土木建筑工程学院, 呼和浩特 010018 | | | 张波 | 内蒙古农业大学水利与土木建筑工程学院, 呼和浩特 010018 | | | 籍健勋 | 内蒙古农业大学水利与土木建筑工程学院, 呼和浩特 010018 | | | 罗艳云 | 内蒙古农业大学水利与土木建筑工程学院, 呼和浩特 010018
内蒙古自治区水资源保护与利用重点实验室, 呼和浩特 010018
黄河流域内蒙段水资源与水环境综合治理协同创新中心, 呼和浩特 010018 | | | 刘廷玺 | 内蒙古农业大学水利与土木建筑工程学院, 呼和浩特 010018
内蒙古自治区水资源保护与利用重点实验室, 呼和浩特 010018
黄河流域内蒙段水资源与水环境综合治理协同创新中心, 呼和浩特 010018 | |
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| 中文摘要 |
| 以黄河流域内蒙古段为研究区，于2021年7月（丰水季）和10月（枯水季）采集降水、黄河干流、黄河支流与季节性河流、乌梁素海、哈素海、岱海、灌区渠系和地下水等水样，测试不同类型水体的水化学组成和氢氧同位素值.综合运用Piper三线图、Gibbs图、离子比例和MixSIAR混合模型等研究方法，分析了黄河流域内蒙古段水化学演变规律，并揭示降水、地表水和地下水的转化关系.结果表明，研究区地下水和地表水均偏弱碱性，水体中优势阴离子为Cl-，优势阳离子为Na+，地表水水化学类型以Cl ·SO4-Na ·Mg和SO4 ·HCO3-Na ·Mg为主，地下水水化学类型以Cl ·SO4-Na ·Mg和SO4 ·HCO3-Na ·Ca.地下水Ca2+和Mg2+主要来源于硅酸盐和蒸发岩的溶解，地表水Ca2+和Mg2+主要源于碳酸盐岩溶解，且水中碳酸和硫酸参与了碳酸盐矿物和硫化矿物溶解的过程，不同水体Na+和Cl-均受人为污染源的影响.受季节效应影响，地表水和地下水δD和δ18 O丰水期较枯水期高，研究表明，地表水在接受大气降水补给后受到了蒸发分馏作用的影响，地下水补给源复杂.MixSIAR模型揭示出，研究区地表水是地下水的主要补给来源，占总补给量的52.4%~62.2%，大气降水是地表水的主要补给来源，占总补给量的85.4%~97.1%. |
| 英文摘要 |
| The Yellow River in Inner Mongolia was selected as the study area in this study. In July (wet season) and October (dry season) of 2021, the acquisition of seasonal rivers, the Yellow River tributaries and precipitation, the Yellow River, Wuliangsuhai, Lake Hasuhai, Lake Daihai, an irrigation canal system, and underground water and sea water samples were collected to test the water chemical composition and hydrogen and oxygen isotopic values of different water types. Using the Piper triplot, Gibbs plot, ion ratio, and MixSIAR model methods, the evolution of water chemistry in the Mongolian section of the Yellow River Basin was analyzed, and the transformation relationship between precipitation, surface water, and groundwater was revealed. The results showed that both groundwater and surface water in the study area were slightly alkaline; the dominant anion in water was Cl-, and the dominant cation was Na+. The main hydrochemical types of surface water were Cl·SO4-Na·Mg and SO4·HCO3-Na·Mg, whereas those of groundwater were Cl·SO4-Na·Mg and SO4·HCO3-Na·Ca. Groundwater Ca2+ and Mg2+ were primarily derived from the dissolution of silicate and evaporite, and surface water Ca2+ and Mg2+ were primarily derived from carbonate karst dissolution and carbonate and sulfuric acid in water participating in the dissolution process of carbonate and sulfide minerals. Na+ and Cl- in different water bodies were all affected by anthropogenic pollution sources. Owing to the seasonal effect, δD and δ18O of surface water and groundwater were higher in the wet season than in the dry season. The results showed that surface water was affected by evaporative fractionation after receiving precipitation recharge, and the groundwater recharge sources were complex. The MixSIAR model revealed that surface water was the main recharge source of groundwater, accounting for 52.4%-62.2% of the total recharge, and atmospheric precipitation was the main recharge source of surface water, accounting for 85.4%-97.1% of the total recharge. |
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