北京通州区第四系地下水化学特征及其成因分析  

Hydrochemistry of Groundwater in Quaternary Aquifers in Tongzhou of Beijing and the Underlying Determinants

作　　者：王小松[1] 李宝学 李阳[1] 姜鑫 姜臣祥 高健 WANG Xiaosong;LI Baoxue;LI Yang;JIANG Xin;JIANG Chenxiang;GAO Jian(Beijing Institute of Geological&Prospecting Engineering,Beijing 100048,China)

机构地区：[1]北京市地质工程勘察院,北京100048

出　　处：《灌溉排水学报》2022年第3期92-97,104,共7页Journal of Irrigation and Drainage

摘　　要：【目的】揭示通州区地下水化学特征及其影响因素。【方法】利用2018年在通州区采集的45件300 m深度的地下水水质检测数据,通过Piper三线图、Gibbs图、因子分析和聚类分析等多元统计分析方法,分析了第四系地下水水化学特征及其影响因素。【结果】通州区第四系地下水浅层水化学类型以HCO;-Ca.Mg型为主,深层地下水化学类型以HCO;-Na型为主。通过因子分析共提取了4个公因子,其累计方差占总方差的85.45%。因子1代表盐度因子,反映了碳酸盐、硅酸盐矿物风化过程;因子2代表铁锰污染因子,反映了富含铁锰元素的矿物的风化作用;因子3代表农业污染因子,反映了农业活动对地下水的影响;因子4代表氟化物污染因子,反映了含氟矿物的风化及阳离子交换反应。【结论】农业活动主要影响通州北部宋庄、永顺一带;而碳酸盐、硅酸盐矿物风化作用,含铁锰元素矿物风化作用,含氟元素矿物风化作用及阳离子交换作用在通州全区普遍存在。【Background and objective】Groundwater in quaternary aquifers in Tongzhou of Beijing is a main water supply source to the region. Though it has been intensively studied over the past decades, there is a lack of understanding of its hydrochemistry and the underlying determinants. The purpose of this paper is to fill this knowledge gap.【Method】A total 45 water samples were collected from boreholes up to the depth of 300m;their biochemistry and the underlying determinants were analyzed using the piper diagram, Gibb’s diagram and cluster analysis.【Result】The shallow groundwater was HCO;-Ca.Mg type and the deep water was HCO;-Na type. Factor analysis extracted four common factors, and the cumulative variance accounted for 85.45% of the total variance. The results of cluster analysis were consistent with the factor analysis. Factor 1 represents salinity, associated with the weathering of carbonate and silicate minerals. Factor 2 represents pollution of iron and manganese, associated with the weathering of minerals rich in iron and manganese. Factor 3 represents agricultural pollution, associated with agricultural production and agronomic practices. Factor 4 represents fluoride, associated with the weathering of minerals rich in fluorine and cation exchange. Groundwater in the north of the region was affected mainly by agricultural production and agronomic practices. Overall, combined with cation exchange, the weathering of carbonate and silicate minerals, as well as minerals rich in iron, manganese and fluoride modulated the groundwater hydrochemistry in the studied region.

关 键 词：水化学 地下水 第四系地下水 通州 北京 

分 类 号：P641[天文地球—地质矿产勘探]