河南嵩县北部基岩山区地下水水化学特征和环境同位素特征分析

发布时间：2018-11-02 11:32

【摘要】：嵩县北部基岩山区位于熊耳山脉东段南部,地下水与地表水分布不均,为研究基岩山区地下水特征和补径排关系,指导缺水山区地下水找水工作,通过现场调查、地下水采样,测定不同水体中的水化学成分及环境同位素,分析其变化特征,判明地下水的补给来源及各含水层的相互联系。水化学和环境同位素研究结果表明,大气降水是研究区地下水的主要补给来源,人工开采是其主要的排泄方式;研究区基岩地下水化学特征较复杂,松散岩类孔隙水、浅(深)层半固结层裂隙孔隙水地下水以Ca~(2+)和HCO_3~ 为主,属HCO_3-Ca型水;松散岩类孔隙水、浅层半固结层裂隙孔隙水含水层之间的水力联系较为密切,基岩裂隙水通过发育的导水构造断裂与现代水连接,均具有较好的开发利用价值,而深层半固结层裂隙孔隙水参与水循环的能力较弱,开采应持慎重态度。该研究成果为缺水山区地下水的合理开采利用提供了科学依据和数据支持。
[Abstract]:The north bedrock mountain area of Songxian is located in the south of the eastern part of Xiong'er Mountain vein. The groundwater and surface water are unevenly distributed. In order to study the relationship between groundwater characteristics and drainage of groundwater in bedrock mountain area, and to guide groundwater exploration in water-deficient mountainous area, groundwater sampling is carried out on the spot. The chemical composition of water and environmental isotopes in different water bodies were determined, and their variation characteristics were analyzed, and the recharge sources of groundwater and the interrelation of each aquifer were determined. The results of hydrochemistry and environmental isotopic studies show that precipitation is the main recharge source of groundwater in the study area, and artificial exploitation is the main discharge mode. In the study area, the chemical characteristics of groundwater in bedrock are more complicated. The pore water of loose rock and the fissure pore water of shallow (deep) layer semi-consolidated layer are mainly Ca~ (2) and HCO_3~ (2), which belong to HCO_3-Ca type water. The pore water of loose rock and the pore water aquifer of fissures in shallow semi-consolidated layer are closely related to each other. The fissure water of bedrock is connected with modern water through the developed water-conducting structure, which is of great value in exploitation and utilization. However, the capacity of deep layer fracture pore water to participate in water circulation is weak, so it is necessary to take a prudent attitude in mining. The research results provide scientific basis and data support for the rational exploitation and utilization of groundwater in water-deficient mountainous areas.
【作者单位】：北京师范大学水科学研究院;中国地质环境监测院;河南省地质矿产勘查开发局第一地质环境调查院;河南省地质矿产勘查开发局第二地质环境调查院;
【基金】：中国地质调查局地质调查项目“太行山区1:5万水文地质调查(9幅)”(编号:12120114010801)资助~~
【分类号】：P641.3

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