The variation characteristics of shallow confined groundwater are similar with phreatic water.
浅层承压水含水组的地下水质变化特征和潜水基本一致。
Arsenic AND WELL water: The world's worst toxic problems are not confined solely to industrial pursuits.Arsenic leaching into groundwater afflicts some 750,000 people, largely in south Asia.
含砷的井水：世界上最严重的有毒问题不只局限与工业，浸析在地下水的砷影响了主要分布在南亚地区的约75万人。
Arsenic AND WELL water: The world's worst toxic problems are not confined solely to industrial pursuits. Arsenic leaching into groundwater afflicts some 750,000 people, largely in south Asia.
含砷的井水：世界上最严重的有毒问题不只局限与工业，浸析在地下水的砷影响了主要分布在南亚地区的约75万人。
Groundwater systems have shallow phreatic water-confined water system and medium layer confined water system.
地下水系统具有双层含水结构：浅层潜水——承压水系统和中层承压水系统。
The fourth confined aquifer is the main compressive layers in recent years in Shanghai. It is corresponding to the current mode of groundwater changes.
与现阶段含水层的水位变化模式相联系，第四承压含水层是上海最近几年来地面沉降的主要沉降层。
The fourth confined aquifer is the main compressive layers in recent years in Shanghai. It is corresponding to the current mode of groundwater changes.
与现阶段含水层的水位变化模式相联系，第四承压含水层是上海最近几年来地面沉降的主要沉降层。
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