济南泉域长孝岩溶水单元水化学特征及硝酸盐污染分布  

Hydrochemical Characteristics and Nitrate Pollution Distribution of Changxiao Karst Water System in Ji'nan Spring Field

作　　者：盛琛 康玉潇 张哲 闵阳阳 王明国 黄报辉 熊贵耀 SHENG Chen;KANG Yuxiao;ZHANG Zhe;MIN Yangyang;WANG Mingguo;HUANG Baohui;XIONG Guiyao(No.801 Hydrogeology and Engineering Geology Exploration Institute of Shandong Provincial Bureau of Geology and Mineral Resource,Shandong Ji'nan 250014,China;Shandong Engineering Research Center for Environmental Protection and Remediation on Underground Water,Shandong Ji'nan 250014,China;Shandong Hydrogeology Engineering Geology and Environment Geology Corporation,Shandong Ji'nan 250014,China;Ministry of Education Key Laboratory of Surficial Geochemistry,Earth Sciences and Engneering,College of Nanjing University,Jiangsu Nanjing 210046,China)

机构地区：[1]山东省地质矿产勘查开发局八〇一水文地质工程地质大队,山东济南250014 [2]山东省地下水环境保护与修复工程技术研究中心,山东济南250014 [3]山东省水工环地质工程有限公司,山东济南250014 [4]南京大学地球科学与工程学院表生地球化学教育部重点实验室,江苏南京210046

出　　处：《山东国土资源》2024年第7期15-24,共10页Shandong Land and Resources

基　　金：国家自然科学青年基金(42102076);山东省自然科学青年基金(ZR2021QD037);山东省地热能调查评价与勘查项目鲁勘字〔2024〕74号联合资助。

摘　　要：济南市保泉与供水之间的矛盾一直突出,而实现泉水保护和水资源的可持续利用之间的平衡是亟须解决的问题。长孝水文地质单元是济南市重要的地下水水源地,了解该单元地下水的水化学演化特征及水质现状是科学合理利用地下水的前提。本文利用Piper三线图、Gibbs图、饱和指数及离子比等方法研究了长孝岩溶水单元的地下水水化学演化特征并对地下水水质进行了评价,结果显示,研究区地下水主要受到岩石风化作用的控制,地下水类型较为丰富,最主要的为HCO_(3)-Ca型水。此外,区内岩溶地下水受到了不同程度的污染,部分区域硝酸根离子超过生活饮用水标准,超标区域主要分布在人口分布密集区和第四系地层较薄区域。本研究为济南市进一步科学开发利用岩溶水资源提供了科学依据。The contradiction between supply and demand of water resources and spring protection is increasingly prominent in Ji'nan city.Realizing a balance between spring water protection and sustainable utilization of water resources is very urgent.Changxiao karst water system is one of the important groundwater sources in Ji'nan city.In this study,chemical composition of groundwater in Changxiao karst water system has been analyzed by pipa three line diagram method,Gibbs diagram method,saturation index method and ion proportion method.The characteristics of groundwater ions in Changxiao karst water system have been studied.It is showed that the groundwater in the study area is mainly controlled by rock weathering.The groundwater types are relatively rich,and main type is HCO_(3)-Ca.The groundwater in the study area has been polluted to a certain extent,and the nitrate ion in some areas exceeds the groundwater quality standard.The groundwater with excessive nitrate is mainly distributed in densely populated areas or areas with thin Quaternary strata.It can provide a basis for further scientific development and utilization of karst water resources in Ji'nan city.

关 键 词：长孝岩溶水单元 岩溶地下水 水化学特征 硝酸盐污染 济南市 

分 类 号：P614[天文地球—矿床学]