摘要
从一般水化学角度研究了南水北调中线源头地表水、干渠水及其周边地下水的差异。结果发现,钠离子在地下水与干渠水和源头地表水中的浓度差异最为明显,其次是总溶解固体(TDS)浓度,其他主要离子以及pH差异均不明显,说明钠离子浓度可作为识别南水北调中线干渠水及其周边地下水水力联系的备选指标。利用聚类分析和水化学类型的相似性,剔除了与干渠水可能存在水力联系的地下水样钠离子浓度,初步确定南水北调中线沿线与干渠水没有水力联系的地下水钠离子浓度大于9.8 mg/L,且该数值是干渠水钠离子浓度的1.6倍以上。因此,可将钠离子浓度及其参考范围用于快速判断南水北调干渠周边地下水与干渠水是否存在水力联系。
This paper investigated the differences of hydrochemistry indices between the source surface water,canal water,and its surrounding groundwater in the middle route of South⁃to⁃North Water Division Project.The results showed that the difference of sodium ion concentration be⁃tween groundwater and canal water as well as the source canal water was the most significant,followed by the concentration of total dissolved solids(TDS),while the concentration of other main ions and pH had no significant difference,indicating that sodium ion concentration could be used as an alternative indicator to identify the hydraulic connection between canal water and its surrounding groundwater in the middle route of South⁃to⁃North Water Division Project.Using the cluster analysis and the similarity of hydrochemical types,sodium concentration in groundwater samples that might have hydraulic connection with canal water were excluded.It was preliminarily delineated that the reference range of sodium concentration in the groundwater without hydraulic connection with the canal water along the middle route of South⁃to⁃North Water Division Project was over 9.8 mg/L,and the range value was more than 1.6 times as the range value of sodium concentration in the canal water.There⁃fore,the indicator of sodium ion and its concentration range could be used to quickly identify whether the groundwater around the main canal of South⁃to⁃North Water Division Project had hydraulic connection with the canal water.
作者
韩晓东
贾兵营
何康
陈玺
HAN Xiao-dong;JIA Bing-ying;HE Kang(Hebei Branch of China South-to-North Water Division Group Middle-Route Co.,Ltd.,Shijiazhuang,Hebei 050035;Nanyang Management Office of Qushou Branch of China South-to-North Water Division Group Middle-Route Co.,Ltd.,Nanyang,Henan 473008)
出处
《安徽农业科学》
CAS
2024年第2期190-196,共7页
Journal of Anhui Agricultural Sciences
基金
中国南水北调集团中线有限公司资助项目“南水北调中线干线水体特征与溯源分析研究”(ZXJ/HB/YW/SZ-2020-007)。
关键词
南水北调干渠
水化学
地下水
水力联系
钠离子
Main canal of South⁃to⁃North Water Division Project
Hydrochemistry
Groundwater
Hydraulic connection
Sodium ion