丹江口水库老灌河流域地下水水化学特征  

Hydrochemical characteristics of groundwater in Laoguanhe River Basin of Danjiangkou Reservoir

作　　者：代贞伟[1,2] 王磊 伏永朋[1,2] 章昱 张方亮[3] 董芯岑 贺小黑[4] DAI Zhenwei;WANG Lei;FU Yongpeng;ZHANG Yu;ZHANG Fangliang;DONG Xincen;HE Xiaohei(Wuhan Geological Survey Center,China Geological Survey,Wuhan 430205,China;Central South China Innovation Center for Geosciences,Wuhan 430205,China;NO.1 Institute of Geo-Environment Survey,Henan Bureau of Geological Exploration and Development,Zhengzhou 450000,China;School of Water Resources & Environmental Engineering,East China University of Technology,Nanchang 330013,China)

机构地区：[1]中国地质调查局武汉地质调查中心,武汉430205 [2]中南地质科技创新中心,武汉430205 [3]河南省地质矿产勘查开发局第一地质环境调查院,郑州450000 [4]东华理工大学水资源与环境工程学院,南昌330013

出　　处：《中国地质调查》2019年第5期43-49,共7页Geological Survey of China

基　　金：中国地质调查局“丹江口水库南阳—十堰市水源区1∶5万环境地质调查(编号:DD20160256)”项目资助

摘　　要：作为南水北调中线工程的水源地,丹江口水库地下水的水质是影响南水北调工程建设的重要因素。为了确保丹江口水库一库清水送北京,对水库老灌河流域进行地下水采样、统计和分析,研究地下水的水化学特征,结果表明:丹江口老灌河流域地下水偏弱碱性,属于低矿化水,Ca^2+为优势阳离子,HCO^-3为优势阴离子;除NO^-3外,该区主要离子浓度均符合我国及世界卫生组织推荐的饮用水标准;丰水期和枯水期地下水的水化学类型均为Ca-Mg-HCO3型和Ca-HCO3型,水化学过程以风化-溶滤作用为主;地下水NO^-3超标13%~17%,丰水期部分区域出现Cl^-型水化学类型。季节变化对老灌河流域地下水的水化学类型空间分布影响较小,地下水水质受农业、养殖业、工业遗留废渣及生活污水等影响。As water source of the Middle Route of South-to-North Water Transfer Project, the water quality of groundwater in Danjiangkou Reservoir is the key factor influencing the construction of South-to-North Water Transfer Project. In order to ensure the water transfer from Danjiangkou Reservoir to Beijing, the authors investigated the hydrochemical characters of groundwater, based on the sampling, statistics and related analysis of groundwater in Laoguanhe River Basin. The results show that the groundwater in Laoguanhe River Basin of Danjiangkou belongs to alkalescence and low mineral, and the dominant cation is Ca^2+, while the dominant anion is HCO^- 3. Except for the NO^- 3, the main ions contents can reach the drinking water standard of China and the World Health Organization. The main hydrochemical types are Ca-Mg-HCO 3 and Ca-HCO 3 in both high-water and low-water periods, and the hydrochemistry process is mainly efflorescence-lixiviation. The NO^- 3 content of groundwater exceeds 13% to 17%, and the Cl^- type groundwater may occur during high-water period. Season change barely influenced the spatial distribution of groundwater hydrochemical type in Laoguanhe River Basin, and the groundwater quality is mainly influenced by the human activities, such as agriculture, aquaculture, industrial residual waste and domestic sewage.

关 键 词：丹江口水库 南水北调工程 地下水 水化学类型 

分 类 号：P641.3[天文地球—地质矿产勘探]