山东省东汶河沂南地区地下水水化学特征及形成机理  

Hydrochemical characteristics and formation mechanism of groundwater in Yi’nan,East Wenhe River basin in Shandong Province

作　　者：魏善明 丁冠涛 袁国霞[4] 汪丽芳[5] 聂玉朋 杜金亮 WEI Shanming;DING Guantao;YUAN Guoxia;WANG Lifang;NIE Yupeng;DU Jinliang(No.801 Hydrogeological and Engineering Exploration Brigade of Shandong Exploration Bureau of Geology and Mineral Resources,Jinan,Shandong250014,China;Key Laboratory of Groundwater Resources and Environment,Shandong Provincial Bureau of Geology&Mineral Resources,Jinan,Shandong250014,China;Shandong Province Groundwater Environmental Protection and Rehabilitation Engineering Technology Research Center,Jinan,Shandong250014,China;Shandong GEO-Surveying&Mapping Institute,Jinan,Shandong250002,China;Institute of Hydrogeology and Environmental Geology,CAGS,Shijiazhuang,Hebei 050061,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]山东省地质矿产勘查开发局地下水资源与环境重点实验室,山东济南250014 [3]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 [4]山东省地质测绘院,山东济南250002 [5]中国地质科学院水文地质环境地质研究所,河北石家庄050061

出　　处：《地质学报》2021年第6期1973-1983,共11页Acta Geologica Sinica

基　　金：国家重点研发计划项目(编号2017YFC0406103)资助的成果。

摘　　要：地下水作为人类重要的水源之一,已经受到了人类活动的明显影响而造成污染,深入研究地下水化学特征及形成机制,对于地下水资源的合理利用具有重要意义。东汶河沂南地区分布着多种类型的含水层,并且农业、养殖业发达,是进行人类活动影响下的地下水水化学形成研究的理想地区。本文综合利用Piper三线图、离子比值法及数理统计(相关性分析、因子分析、聚类分析)等方法,对东汶河沂南地区地下水水化学特征及形成机理进行研究。研究结果表明,本区地下水水化学类型总体以HCO_(3)-Ca、HCO_(3)-Ca·Mg型为主,TDS含量在243~1473mg/L之间。地下水中HCO_(3)^(-)、SO_(4)^(2-)、Ca^(2+)和Mg^(2+)等离子主要来自于碳酸盐类矿物及硫酸盐类矿物的溶解,而Na^(+)、K^(+)、Cl^(-)、NO_(3)^(-)则主要来自于岩盐溶解和人类活动污染。水岩作用对地下水水化学的影响超过了62.024%;受人类活动影响明显的水样占到了总水样数的13.6%,对地下水水化学的贡献率则达到了20.318%。河谷平原地区受到农业及养殖业等人类活动的污染明显。As one of the most important water sources,groundwater has been significantly affected by human activities.The study of chemical characteristics and formation mechanism of groundwater is of great significance for the rational utilization of groundwater resources.Various types of aquifers are distributed in Yi’nan,East Wenhe River basin where agriculture and aquaculture are well-developed.Therefore,this area is ideal for the study of formation and groundwater hydrochemistry under the influence of human activities.The Piper diagram,ion ratio method,mathematical statistical methods(correlation analysis,factor analysis,cluster analysis)and other methods are used to study the groundwater hydrochemical characteristics and formation mechanism in the study area.The results show that the groundwater hydrochemical types are mainly HCO_(3)-Ca and HCO_(3)-Ca·Mg,and the TDS content is between 243and 1473mg/L.The HCO_(3)-,SO_(4)^(2-),Ca_(2+)and Mg^(2+)in groundwater mainly come from the dissolution of carbonate and sulfate minerals,while Na^(+),K^(+),Cl^(-)and NO_(3)^(-)mainly come from the dissolution of halite and pollution by human activities.The effect of water-rock interaction on groundwater hydrochemistry exceeds 62.024%.The number of groundwater samples with obvious influence of human activities accounts for 13.6%of the total groundwater samples,and the contribution of anthropogenic impacts to groundwater hydrochemistry reaches 20.318%.The river valley plain is obviously polluted by human activities such as agriculture and aquaculture.

关 键 词：岩溶 水文地球化学 水岩作用 污染 地下水资源 东汶河沂南地区 

分 类 号：P641.12[天文地球—地质矿产勘探]