城市地质2025，Vol.20Issue(3)：310-320,11.DOI:10.3969/j.issn.2097-3764.2025.03.004
北京市朝阳区地下水水化学特征及成因机制
Hydrochemical characteristics and genesis mechanisms of groundwater in Chaoyang District,Beijing
摘要
Abstract
This study investigates the hydrochemical characteristics and formation mechanisms of groundwater in Chaoyang District,Beijing,utilizing hydrochemical data from 70 groundwater samples.Comprehensive analysis employing Piper trilinear diagrams,Gibbs diagrams,and ion ratios reveals the following key findings:1)Groundwater hydrochemistry is predominantly characterized as HCO3-Ca type,with some samples in the first aquifer being Cl·SO4-Ca·Mg type,and a small amount of HCO3-Na·Ca type water in the third and fourth aquifers,indicating a trend of cation evolution from Ca²+dominance towards Na+with increasing depth;2)Rock weathering constitutes the primary control on groundwater chemistry,with minor influences from evaporation and atmospheric precipitation,and some local areas affected by human activities;3)Positive cation exchange is prevalent throughout the study area and intensifies with aquifer depth;4)Nitrate in groundwater mainly originates from urban domestic sewage and industrial wastewater,with secondary contributions from soil organic nitrogen and fecal inputs.The research findings provide a scientific basis for the protection and management of groundwater resources in Chaoyang District.关键词
朝阳区/浅层地下水/地下水化学特征/成因机制/离子交换Key words
Chaoyang District/shallow groundwater/groundwater chemical characteristics/formation mechanism/Ion exchange引用本文复制引用
张旭航,杨庆,赵微,陈凯,刘辛初,赵杰..北京市朝阳区地下水水化学特征及成因机制[J].城市地质,2025,20(3):310-320,11.基金项目
北京市地下水监测网运行项目(11000022T000000440194)资助 （11000022T000000440194）
