| 河北省任丘市浅层地下水化学特征及形成机制 |
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| 引用本文： | 薛东青,谢明忠,李少虎,杜丽媛,刘咏康,李鹏.河北省任丘市浅层地下水化学特征及形成机制[J].地质论评,2022,68(1):245-252. |
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| 作者姓名： | 薛东青 谢明忠 李少虎 杜丽媛 刘咏康 李鹏 |
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| 作者单位： | 河北省煤田地质局环境地质调查院,石家庄,050091 |
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| 基金项目： | 本文为河北省任丘市城市地质调查项目的成果 |
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| 摘 要： | 浅层地下水是任丘市重要的水资源之一,为研究其水化学特征及其形成机制,本文在实地调查取样分析化验的基础上,以水文地球化学理论为指导,借助多元数理统计的方法,从多个角度揭示了研究区浅层地下水的形成演化过程:①通过离散分析,认为研究区各主要离子变异系数较大,说明研究区浅层地下水受人为影响明显,水化学特征复杂。②通过相关分析,认为Na+、Ca2+、Mg2+、Cl-、以及SO42-为研究区原始浅层地下水主要离子,而HCO3-与NO3-为外来离子且异源;③通过聚类分析,可将研究区浅层地下水分为A、B、C三类,其中A类处于Gibbs图中岩石风化端元,矿化度较低,为微咸水或淡水,含HCO3-和NO3-,受农业灌溉水影响;B类处于Gibbs图中岩石风化端元向蒸发浓缩端元过渡,矿化度居中,为微咸水,NO3-含量相对较高,受生活污水影响;C类地下水处于Gibbs图中蒸发浓缩端元,矿化度较高,以咸水为主,与地表水体连通性差,接近原始浅层地下水化学类型。④通过主成分分析,认为研究区原始地下水化学类型为SO42-·Cl-—Na+型及SO42-·Cl-—Na+·Ca2+型,受干旱环境下蒸发和海水入侵双重影响。
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| 关 键 词： | 浅层地下水 水化学特征 多元数理统计 形成机制 |
| 收稿时间： | 2021/6/9 0:00:00 |
| 修稿时间： | 2021/11/25 0:00:00 |
Chemical characteristics and formation mechanism of shallow groundwater in Renqiu City,Hebei Province |
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| XUE Dongqing,XIE Mingzhong,LI Shaohu,DU Liyuan,LIU Yongkang,LI Peng.Chemical characteristics and formation mechanism of shallow groundwater in Renqiu City,Hebei Province[J].Geological Review,2022,68(1):245-252. |
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| Authors: | XUE Dongqing XIE Mingzhong LI Shaohu DU Liyuan LIU Yongkang LI Peng |
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| Institution: | Institute of Environmental Geology,Hebei Coal Geology Bureau,Shijiazhuang,050091 |
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| Abstract: | the shallow groundwater is one of the important water resources in renqiu,to study the water chemical characteristics and formation mechanism,this paper on the basis of field investigation and sampling analysis laboratory,on the hydrogeochemical theory as the instruction,with the aid of multivariate statistics method,from various angles to reveal the evolution process of the formation of shallow groundwater in the study area:(1)Through discrete analysis,it is considered that the variation coefficient of major ions in the study area is large,indicating that the shallow groundwater in the study area is obviously affected by human and the hydrochemical characteristics are complex.(2)Through correlation analysis,it is believed that Na+,Ca2+,Mg2+,Cl-,and SO42-are the main ions in the original shallow groundwater in the study area,while HCO3-and NO3-are foreign ions and heterologous ions.(3)According to the cluster analysis,the shallow groundwater in the study area can be divided into three categories:A,B,and C,among which A is in the weathering end of rocks in Gibbs diagram,with low salinity,briny water or fresh water,containing HCO3-and NO3-,and is affected by agricultural irrigation water.Type B is in the transition from the weathering end to the evaporation and concentration end in Gibbs diagram.Its salinity is in the middle,and it is briny water with relatively high NO3-content,which is affected by domestic sewage.Class C groundwater is at the end of evaporation and concentration in Gibbs diagram,with high salinity,mainly salt water,poor connectivity with surface water,and close to the original shallow groundwater chemical type.(4)According to the principal component analysis,the original groundwater chemical types in the study area are SO42-·Cl-—Na+type and SO42-·Cl-—Na+·Ca2+type,which are affected by both evaporation in arid environment and seawater intrusion. |
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| Keywords: | shallow groundwater hydrochemical characteristics multivariate mathematical statistics formation mechanism |
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