分层抽水在大厚度含水层水文地质勘查中的应用  

Application of stratified pumping test in hydrogeological exploration of lager thickness aquifers

作　　者：李海学[1] 程旭学[1] 韩双宝[1] 刘伟坡[1] LI Haixue;CHENG Xuxue;HAN Shuangbao;LIU Weipo(Center for Hydrogeology and Environment Geology,China Geological Survey,Baoding 071051 China)

机构地区：[1]中国地质调查局水文地质环境地质调查中心,河北保定071051

出　　处：《南水北调与水利科技（中英文）》2020年第5期174-181,共8页South-to-North Water Transfers and Water Science & Technology

基　　金：自然资源部地质调查项目(DD20190333,DD20160288)。

摘　　要：为查明深埋于240m以下总厚度达660m的多个大厚度含水层的渗透系数、涌水量、水质等参数,基于钻孔岩心和测井资料划分6个抽水试段,利用分层抽水试验进行取样和计算相关参数。研究表明:研究区洛河组和环河组平均渗透系数均为上段小于下段,同一含水岩组上下段含水层之间几乎没有水力联系;洛河组上段含水层富含锶优质淡水资源,可作为城镇集中水源地的目标开采层,同时要防止过度开采导致水质变差;单孔多层段含水层分层抽水试验不仅可以精确获取大厚度含水层的水文地质参数,还对厘清含水层间越流关系及合理规划地下水开发利用具有重要意义。Water inflow,water quality and other parameters of several aquifers with a buried depth of 240 mand a thickness of 660 mfor large thickness aquifers.Based on borehole core and logging data,the well is divided into 6 pumping section.The results showed that:the average hydraulic conductivity of the Luohe and Huanhe aquifer is lower than that in the upper section in the study area,there is almost no hydraulic connection between the upper and lower aquifers of the same aquifer group,the upper of the Luohe aquifer is rich in high-quality freshwater resources,which can be used as a target mining layer for urban concentrated water sources,and simultaneously prevent over-exploitation and lead to poor water quality,the stratified pumping test with new packer technology may effectively solve the difficulty of obtaining hydrogeological parameters of large thickness aquifers,which not only improve the accuracy of the survey but also obtain accurate and reliable hydrogeological parameters.Therefore,it is of great significance to clarify the flow relationship between aquifers and to rationally plan the exploitation and utilization of groundwater.

关 键 词：分层抽水试验 大厚度含水层 白垩系 水文地质参数 

分 类 号：TV221[水利工程—水工结构工程]