黄河流域内蒙古段水化学同位素特征及水体转化关系  

Water Chemical Isotope Characteristics and Water Transformation Relationship in Mongolian Section of the Yellow River Basin

作　　者：裴森森 段利民[1,2,3] 苗平 潘浩 崔彩琪 张波 籍健勋 罗艳云 刘廷玺[1,2,3] PEI Sen-sen;DUAN Li-min;MIAO Ping;PAN Hao;CUI Cai-qi;ZHANG Bo;JI Jian-xun;LUO Yan-yun;LIU Ting-xi(Water Conservancy and Civil Engineering College,Inner Mongolia Agricultural University,Hohhot 010018,China;Inner Mongolia Key Laboratory of Water Resource Protection and Utilization,Hohhot010018,China;Collaborative Innovation Center for Integrated Management of Water Resources and Water Environment in Inner Mongolia Section of the Yellow River Basin,Hohhot 010018,China;Ordos River and Lake Protection Center,Ordos 017010,China)

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018 [2]内蒙古自治区水资源保护与利用重点实验室,呼和浩特010018 [3]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 [4]鄂尔多斯市河湖保护中心,鄂尔多斯017010

出　　处：《环境科学》2023年第9期4863-4873,共11页Environmental Science

基　　金：内蒙古自治区科技重大专项(2020ZD0009);内蒙古自治区“科技兴蒙”行动重点专项(KJXM-EEDS-2020005);国家重点研发计划项目(2021YFC3201201);科技部重点领域创新团队项目(2015DFA00530);教育部创新团队发展计划项目(IRT_17R60)。

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·SO_(4)-Na·Mg和SO_(4)·HCO_(3)-Na·Mg为主,地下水水化学类型以Cl·SO_(4)-Na·Mg和SO_(4)·HCO_(3)-Na·Ca.地下水Ca^(2+)和Mg^(2+)主要来源于硅酸盐和蒸发岩的溶解,地表水Ca^(2+)和Mg^(2+)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δ18O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%.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·SO_(4)⁃Na·Mg and SO_(4)·HCO_(3)⁃Na·Mg,whereas those of groundwater were Cl·SO_(4)⁃Na·Mg and SO_(4)·HCO_(3)⁃Na·Ca.Groundwater Ca^(2+)and Mg^(2+)were primarily derived from the dissolution of silicate and evaporite,and surface water Ca^(2+)and Mg^(2+)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 andδ18O 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

关 键 词：黄河流域 水化学特征 氢氧同位素 MixSIAR模型 地下水 

分 类 号：X143[环境科学与工程—环境科学]