盐城滨海冲积平原孔隙承压地下水埋深对水质的影响  

Influence of pore confined groundwater depth on the groundwater quality of the alluvial coastal plain of Yancheng

作　　者：马钧霆 陈锁忠[1,2] 何志超[1] 朱晓婷[1] MA Junting CHEN Suozhong HE Zhichao ZHU Xiaoting(Key Laboratory of Virtual Geographical Environment,Ministry of Education, Nanjing Normal University,Nanjing 210023, China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China)

机构地区：[1]南京师范大学虚拟地理环境教育部重点实验室,南京210023 [2]江苏省地理信息资源开发与利用协同创新中心,南京210023

出　　处：《生态学报》2017年第5期1583-1594,共12页Acta Ecologica Sinica

基　　金：国家自然科学基金资助项目(41571386);江苏省高校自然科学研究重大项目(10KJA170028)

摘　　要：含水层（组）的空间结构不仅决定了地下水的空间分布格局,对地下水水质状况也有一定程度的影响。基于盐城滨海平原水文地质分区内部水文地质钻孔数据及2005—2014年水质因子监测数据,综合运用GIS及ANOVA等方法,研究了实验样区第III承压含水层孔隙地下水的水质在时空维度上对含水层顶板埋深变化的响应特征,分析了地下水质动态演变规律,并对研究区地下水管理与保护提出了建议。研究结果表明：该区第III承压含水层埋深大多位于-118.9—-85.45m之间;由于不同埋深的地下水所处的水文地质条件及开采利用状态差异,地下水典型水质因子含量与含水层埋深因素之间呈现出一定相关性：矿化度、总碱度和细菌总数3种因子与埋深的关联强度最高（相关度分别为69.67%、75.76%和58.09%）,总硬度因子的关联强度处于中等水平（49.18%）;高锰酸钾指数受埋深影响较小（35.27%）;同时还发现,在不同埋深分级区间各因子与埋深的关联强度差异明显,表现出不同的动态演变特征。Pore confined groundwater is an important fresh water resource for human beings. Pore groundwater is stored in systems of loose sedimentary aquifers. The spatial structure of the aquifer （or aquifer group） determines not only the spatial distribution pattern of groundwater, but also has some influence on the groundwater quality. Based on hydro-geological data and groundwater quality monitoring data collected between 2005 and 2014in the Yancheng coastal plain in China, methods including GIS and ANOVA were used to study the relationship between groundwater quality and the third confined aquifer buried depth. The groundwater quality dynamic evolution characteristics are also analyzed. Based on the conclusions, some recommendations are proposed to the local water resources management department. Firstly, based on the hydrogeological data in the study area, the buried depth Digital Elevation Model（DEM） was constructed and divided into 10 grades. The correlation between water quality factors and the aquifer buried depth was analyzed using variance analysis. The least significant difference method was used to determine the influence of different grading intervals on water quality factors. The average value of the monitored data for each year and for each buried depth interval was counted and time varying process curves of water quality factor levels were plotted to show the spatial and temporal variation of water quality factors with aquifer depth. The results showed that：in the study area, the III confined aquifer buried depth is mostly located between -118.9 m and -85.45 m. Owing to the variety of groundwater hydrogeological condition and different buried depths, some correlation between typical groundwater quality and aquifer buried depth is presented：Mineralization degree, total alkalinity and total bacterial count show the highest correlation with groundwater buried depth （69.67%, 75.76% and 58.09% respectively）. Correlation between total hardness factor and depth is moderate （49.18%）. The potas

关 键 词：承压含水层 水质因子 含水层埋深 相关关系 动态演变 

分 类 号：P641[天文地球—地质矿产勘探] X523[天文地球—地质学]