天津市西青区王稳庄地区不同含水组地下水化学特征研究  

Study on the chemical characteristics of groundwater in different aquifer groups in Wangwenzhuang area,Xiqing District,Tianjin

作　　者：田景荣 王士国 武恒 樊勇军 TIAN Jing-rong;WANG Shi-guo;WU Heng;FAN Yong-jun(Tianjin Institute of Geological Engineering Survey and Design Co.,Ltd.,Tianjin 300191,China)

机构地区：[1]天津市地质工程勘测设计院有限公司,天津300191

出　　处：《地下水》2022年第6期4-6,共3页Ground water

基　　金：西青区分层标组建设工程(12122020117001)。

摘　　要：天津市地下水超采区主要位于西青区和武清区。为研究天津地下水超采区动态变化特征,以天津西青区王稳庄地区为研究区域,基于王稳庄地区590 m以上地层、水文地质资料划分该区域含水组,综合地下水简分析结果,明确各含水层水化学类型,确定王稳庄地区咸水底界埋深。结果显示:(1)研究区松散含水层自上而下划分为5个;各含水组阳离子Na+含量最高,其次依次为Mg^(2+)、Ca^(2+)、K^(+),各离子浓度垂向分布特征为由上向下总体呈逐渐减小趋势。阴离子以Cl^(-)、SO_(4)^(2-)为主,HCO_(3)^(-)次之。(2)各含水层地下水化学类型为:第Ⅰ含水组上部含水层地下水为Cl^(-)Na型水,第Ⅰ含水组下部含水层地下水为Cl^(-)Na·Mg型水;第Ⅱ含水组上部含水层水为Cl·SO_(4)^(-)Na型水,第Ⅱ含水组下部含水层水为Cl^(-)Na型水;第Ⅲ含水组地下水为Cl^(-)Na型水;第Ⅳ含水组地下水为HCO3·Cl^(-)Na型水;第Ⅴ含水组地下水为Cl^(-)Na型水。(3)研究区第Ⅰ含水组矿化度高达17.676 g/L,在第Ⅱ含水组上部含水层112.4~124.4 m处矿化度为6.773 g/L,总体随埋深增加呈递减趋势;在第Ⅱ含水组下部含水层175.8~207.4 m处矿化度为0.903 g/L,水质较好,是良好的储水含水层,可作为灌溉用水和工业用水开采使用。研究结果为本区域地下水的开发利用提供科学依据。Tianjin groundwater over-exploitation area is mainly located in Xiqing District and Wuqing District.In order to study the dynamic change characteristics of Tianjin groundwater over-exploitation area, taking the Wang Wenzhuang area of Tianjin Xiqing District as the research area, the aquifer of the area is divided according to the strata and hydrogeological data of more than 590 m in the Wang Wenzhuang area, and the results of the simple analysis of groundwater are synthesized, the water chemistry type of each aquifer is clarified, and the burial depth of the benthic boundary of the brackish water in the Wang Wenzhuang area is determined.The results showed that:(1) the loose aquifers in the study area were divided into 5 from top to bottom. The cationic Na+content of each aqueous group was the highest, followed by Mg^(2+), Ca^(2+), K^(+), and the vertical distribution of ion concentration was characterized by a gradual decrease from top to bottom.Anions are dominated by Cl^(-)and SO_(4)^(2-), followed by HCO_(3)^(-).(2) The chemical types of groundwater of each aquifer are: the groundwater of the upper aquifer of the Ⅰ aquifer is Cl^(-)Na type water, and the groundwater of the lower aquifer of the Ⅰ aquifer is Cl^(-)Na · Mg type water. The water of the upper aquifer of the aquifer group Ⅱ is Cl· SO_(4)^(-)Na type water.The lower aquifer water of the Ⅱ aquifer is Cl^(-)Na type water. The groundwater of the aquifer Ⅲ is Cl^(-)Na type water. Ⅳ Aquifer Groundwater is HCO3· Cl^(-)Na type water. The groundwater of the Ⅴ aquifer group is Cl^(-)Na type water.(3) The mineralization degree of the Ⅰ aquifer in the study area was as high as 17.676 g/L, and the mineralization degree was 6.773 g/L at the aquifer 112.4~124.4 m in the upper aquifer of the Ⅱ aquifer, and the overall mineralization degree showed a decreasing trend with the increase of burial depth. In the lower part of the Ⅱ aquifer 175.8~207.4 m mineralization degree of 0.903 g/L, the water quality is better, it is a good storage aquifer, wh

关 键 词：西青区王稳庄 地下水化学类型 垂向变化 咸水底界 

分 类 号：P641.12[天文地球—地质矿产勘探]