升金湖河湖交汇区地表-地下水水化学特征及成因分析  

Hydro-chemical Characteristics and Ion Origin Analysis of Surface Groundwater at the Shengjin Lake and Yangtze River Interface

作　　者：崔玉环[1] 王杰[2] 刘友存[3] 郝泷 高祥 CUI Yu-huan;WANG Jie;LIU You-cun;HAO Shuang;GAO Xiang(School of Science,Anhui Agricultural University,Hefei 230036,China;College of Resources and Environmental Engineering,Anhui University,Hefei 230039,China;School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]安徽农业大学理学院,合肥230036 [2]安徽大学资源与环境工程学院,合肥230039 [3]江西理工大学资源与环境工程学院,赣州341000

出　　处：《环境科学》2021年第7期3223-3231,共9页Environmental Science

基　　金：国家自然科学基金项目(41401022,41861002,41801332);安徽高校自然科学研究项目(KJ2019A0045)。

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-HCO_(3)类型水为主,且在夏季占比明显高于其他季节,而地下水以CaHCO_(3)和Ca-SO_(4)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Ca^(2+)和Mg^(2+)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.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-HCO_(3) type,but the proportion of the Ca-SO_(4) type in summer is significantly lower than that in other seasons;Groundwater primarily belongs to Ca-HCO_(3) and Ca-SO_(4) types,with proportions of 46%and 27%,respectively,and the seasonal difference is not significant.(3) Ca^(2+) and Mg^(2+) 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.

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 

分 类 号：X524[环境科学与工程—环境工程]