华北东部平原地下水垂向循环的水化学与同位素标示

Indication of hydrochemistry and isotope for vertical circulation of groundwater in the North China Plain

摘要: 在华北平原东部,选择典型地区(地调局衡水水文地质科学试验场),开展不同层位的抽水试验工作,在充分分析研究区水文地质条件的基础上,揭示在抽水试验过程中不同层位、不同时间的地下水的水化学和同位素组成,探索地下水垂向循环特征。研究表明:研究区地下水划分为三种地下水类型,随地下水埋藏深度的增加,水质逐渐变好,地下水溶解性总固体减小,硬度降低,具有垂向分带性。第Ⅰ含水组为现代水,由大气降水补给,第Ⅱ、Ⅲ含水组为现代水与古水的混合水,水力联系密切,有浅层地下水的越流补给;第Ⅳ、Ⅴ含水组为古水,水力联系不如前者密切,没有上部含水层发生越流补给;第Ⅲ、Ⅳ含水层没有水力联系。

Abstract: In the North China Plain,a typical area(China Geological Survey Hengshui Hydrogeology Test Facility) was chosen to perform the bailing experiment in different water-bearing strata.On the basis of a full analysis of the hydrogeological conditions of the study area,the hydrochemistry and isotopic compositions of groundwater in the different water-bearing strata and different times were revealed in the Bailing experiment process.The vertical cyclical characteristics of groundwater were explored.The...