闪电河流域正蓝旗段水化学和同位素特征及水体转换关系  

Hydrochemical and isotopic characteristics and water transformation relationships in the Zhenglan Banner section of Shandian River Basin,China

作　　者：纪明宇 贾德彬[1,2] 郝玉胜 刘婷 杨丽娜 李晓艳 吕晨歌 尚紫琴 JI Mingyu;JIA Debin;HAO Yusheng;LIU Ting;YANG Lina;LI Xiaoyan;LYU Chenge;SHANG Ziqin(College of Water Conservancy and Ciwil Engineering,Inner Mongoliu Agriculurul Universily,Huhlot 010018,Chinu;Key Luborulory of Ecv-Hydrology urnud Efficier Use uf Water Resources,Inner Mongolia Autonomous Region,Hohhot 010010,China;Centre for Management of Baotou Reseroir,Baotou 014017,Inner Mongolia,China;Hohhot Sub-Center for Hydrology and Water Resources,Hohhot 010010,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]内蒙古自治区生态水文与水资源高效利用重点实验室,呼和浩特010010 [3]包头市水库管护中心,内蒙古包头014017 [4]呼和浩特水文水资源分中心,呼和浩特010010

出　　处：《应用生态学报》2024年第11期3149-3156,共8页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金地区项目(52169003);内蒙古自然科学基金联合基金项目(2023LHMS05024);内蒙古自治区教育厅一流学科科研专项项目(YLXKZX-NND010)资助。

摘　　要：水资源是维持生命、推动经济发展和保护环境的重要元素。为查明闪电河流域内地表水和地下水的水化学演变规律、驱动因素和各水体间的转化关系,于2023年5—10月收集降水,8月(丰水期)和10月(枯水期)各采集一次地表水、地下水水样。运用Piper三线图、Gibbs图、离子比值法、氢氧同位素分析法和MixSIAR混合模型等方法对采集的水样进行分析。结果表明:研究区地下水、地表水普遍呈现出弱碱性,地下水化学组成的主导类型为HCO_(3)^(-)-Ca^(2+)·Na^(+)型;地表水由丰水期过渡至枯水期的过程中,地表水主要水化学类型由HCO_(3)^(-)-Ca^(2+)·Na^(+)型转变为HCO_(3)^(-)-Na^(+)·Mg^(2+)型和HCO_(3)^(-)-Ca^(2+)·Na^(+)·Mg^(2+)型。不同水体类型的水化学特征受岩石风化作用、水分蒸发浓缩现象以及阳离子交换等多重因素的综合影响。在丰水期,地表水δD和δ^(18)O同位素值呈现显著富集现象;丰、枯水期地下水始终呈贫化状态。丰、枯水期,地表水线斜率低于降水线斜率;丰水期地下水线斜率近似于降水线和地表水线,表明丰水期各水体间转换关系的复杂性。降水是地表水的主要补给(70%),地下水是地表水的次要补给(30%),枯水期只有地下水补给地表水。本研究可为流域水资源管理与保护提供基础支撑。Water resources are essential for sustaining life,driving economic development,and protecting the environment.We investigated the hydrochemical variations of surface water and groundwater in the Shandian River Basin to identify the driving factors and the transformation relationship between each water body.Precipitation data was collected from May to October 2023,while surface water and groundwater samples were collected in both August(wet season)and October(dry season).We analyzed water samples by Piper triplex diagram,Gibbs diagram,ion ratio method,hydrogen and oxygen isotope analysis,and MixSIAR mixed model.The results indicated that both groundwater and surface water were generally weakly alkaline.The dominant type of groundwater chemical composition was HCO_(3)^(-)-Ca^(2+)·Na^(+).During the process of surface water transitioning from the wet season to the dry season,the predominant surface water chemistry type shifted from HCO_(3)^(-)-Ca^(2+)-Na^(+)to HCO_(3)^(-)-Na^(+)-Mg^(2+),as well as HCO_(3)^(-)-Ca^(2+)-Na^(+)-Mg~2.Furthermore,the main hydrochemical types of surface water changed during the transition from wet season to dry season.The hydrochemical characteristics of different types of water were influenced by weathering of rocks,evaporation and concentration of water,as well as cation exchange.Additionally,significant enrichment ofδD andδ^(18)O isotopic values in surface water was observed during the wet season,and the ground-water remained in a depleted state during both wet and dry seasons.During the wet and dry seasons,the slope of surface water line was lower than that of the precipitation line,and the slope of groundwater line during the wet season was similar to that of the precipitation line and the surface water line,indicating the complexity of the conversion relationship between various water bodies during the wet season.The precipitation served as~70%primary recharge source for surface waters,whereas underground aquifers contributed~30%,being the secondary recharge source.During the dry s

关 键 词：闪电河正蓝旗段 氢氧稳定同位素 水化学特征 水体转换 MixSIAR模型 

分 类 号：P342[天文地球—水文科学]