安徽涡河地区浅层地下水化学特征分析  

Chemical characteristics of shallow groundwater in Guo river area,Anhui province

作　　者：马涛[1] 张朝君 MA Tao;ZHANG Chao-jun(Geological Survey of Anhui Province,Hefei 230001,Anhui,China)

机构地区：[1]安徽省地质调查研究院,安徽合肥230001

出　　处：《地下水》2021年第5期22-24,31,共4页Ground water

基　　金：安徽省自然资源厅(原国土资源厅)地质调查项目“1:5万楚店集、高炉集、江集和望町集幅覆盖区综合地质调查”(2016-g-3-32)。

摘　　要：选择安徽涡河地区为研究区,通过采集区域内的浅层地下水的水文地球化学指标进行测试与分析,结果表明:区域内的地下水类型主要受到自然环境与人类活动影响,浅层地下水水化学类型在阴阳离子组成上较为接近,指示的沉积环境是基本一致的;三氮指标的高变异系数,指示了浅层地下水受化肥、污水、粪便等农业污染和生活污染的影响显著;铁、锰浓度的高背景值主要与区内地下水所属的水文地质单元有关。研究区浅层地下水的硬度与TDS的空间分布特征指示了区域地下水的的补径排方向。此外研究区内的地下水类型主要以HCO_(3)-Na型、HCO_(3)-Na·Mg型、HCO_(3)-Na·Ca·Mg型为主,分别占总数的28.57%、18.49%、14.29%。The Guohe area of Anhui Province was selected as the study area,and the hydrogeochemical indexes of shallow groundwater in the area were collected and tested and analyzed.The results show that the groundwater types in the area are mainly affected by the natural environment and human activities,and the hydrochemical types of shallow groundwater are relatively close in the composition of cation and anion,reflected the sedimentary environment is basically the same;the high variation of three nitrogen indicators,showed that shallow groundwater is significantly affected by agricultural pollution and domestic pollution such as chemical fertilizer,sewage and feces.The high background values of Fe and Mn concentrations are mainly related to the hydrogeological units of groundwater in the area.The spatial distribution characteristics of hardness and TDS of shallow groundwater indicate the direction of recharge,runoff and drainage of regional groundwater.In addition,the groundwater types in the study area are mainly HCO_(3)-Na、HCO_(3)-Na·Mg、HCO_(3)-Na·Ca·Mg,accounting for 28.57%,18.49% and 14.29% of the total respectively.

关 键 词：涡河地区 浅层地下水 水化学特征 水化学类型 

分 类 号：P641.12[天文地球—地质矿产勘探]