涞源西部地下水化学特征及成因分析  

Chemical Characteristics and Genesis of Groundwater in the West of Laiyuan

作　　者：邱淑伟 张冬旺 王占川 李铎 闫佰忠 刘昭 QIU Shu-wei;ZHANG Dong-wang;WANG Zhan-chuan;LI Duo;YAN Bai-zhong;LIU Zhao(Hebei GEO University,Shijiazhuang 050031,China;Hebei Province Key Laboratory of Sustained Utilization and Development of Water Resources,Shijiazhuang 050031,China;Hebei Province Collaborative Innovation Center for Sustainable Utilization of Water Resources and Optimization of Industrial Structure,Hebei GEO University,Shijiazhuang 050031,China)

机构地区：[1]河北地质大学水资源与环境学院,河北石家庄050031 [2]河北省水资源可持续利用与开发实验室,河北石家庄050031 [3]河北省水资源可持续利用与产业结构化协同创新中心,河北石家庄050031

出　　处：《河北地质大学学报》2022年第5期56-62,共7页Journal of Hebei Geo University

基　　金：河北地质大学校内青年项目(QN202144);河北地质大学博士科研启动基金项目(BQ2017006);河北省专业学位教学案例库建设项目(KCJSZ2020095)。

摘　　要：涞源西部山区为拒马河发源地,分析涞源西部地下水化学特征及其成因对河北省和北京市用水安全具有重要意义。通过地下水特征统计,Piper三线图、Gibbs图以及离子比值法,得出涞源西部地下水pH为7.3~8.4,属于中性或弱碱性。机井与泉水水样点TDS为226~604 mg/L,地下水类型主要为HCO_(3)-Ca·Mg和HCO_(3)-Mg·Ca型。Gibbs图揭示了区内地下水主要离子组分受岩石风化作用控制。Na^(+)离子含量低,分析认为:区内白云岩和灰岩饱和致使地下水中的Mg^(2+)及Ca^(2+)置换出Na^(+),使地下水中Na^(+)含量偏低;区内存在大量的灰岩,其水解为地下水提供了更多的Ca^(2+);较高的ρ(Mg^(2+))/ρ(Ca^(2+))值以及较低的ρ(Na^(+))/ρ(Ca^(2+))值,表明地下水中白云岩的风化溶解多于灰岩。人口聚集区W-14北石佛为代表的涞源盆地地区,氮元素含量超过其他区域,指标均未超过地下水质量非常规指标及限值的第三类。The western mountainous area of Laiyuan is the source of Juma River.The analysis of the chemical characteristics and causes of groundwater in the western area of Laiyuan is of great significance to the water security of Hebei Province and Beijing.According to the statistics of groundwater characteristics,Piper trigram,Gibbs diagram and ion ratio method,it is concluded that the pH of groundwater in the west of Laiyuan is 7.3~8.4,which is neutral or weakly alkaline.The TDS of water sample points of mechanical wells and springs were 226~604 mg/L,and the groundwater types were mainly HCO_(3)-Ca·Mg and HCO_(3)-Mg·Ca.Gibbs diagram reveals that the main ion components of groundwater in the area are controlled by rock weathering.The content of Na^(+)is low.The analysis shows that the saturation of dolomite and limestone in the area causes the Replacement of Na^(+)by Mg^(2+)and Ca^(2+)in groundwater,and the content of Na^(+)in groundwater is low.There are a lot of limestone in the area,whose hydrolysis provides more Ca^(2+)for groundwater.Higherρ(mg2+)/ρ(Ca^(2+))value and lowρ(Na^(+))/ρ(Ca^(2+))value,indicate that the weathering of dolomite in the groundwater in dissolving than limestone.The content of nitrogen in the Laiyuan Basin,represented by W-14 North Shifo in the population gathering area,is higher than other areas,and the indexes do not exceed the third category of unconventional indexes and limits of groundwater quality.

关 键 词：涞源西部 地下水特征 成因分析 离子含量比 

分 类 号：P641.4[天文地球—地质矿产勘探]