aquifer

Know the source of your drinking water—the river, lake, or aquifer that supplies your home..知道你的饮用水的来源——河流，湖泊或是你家的含水土层。

"Pumping from the Pleistocene aquifer has certainly had an adverse effect in terms of drawing down arsenic at significantly high concentrations over about 100 years," says Burgess..从更新世含水层抽水对于带动砷元素的下沉毫无疑问是有不利影响的，何况向这样抽水已经在相当高的强度下进行了100多年。

confined aquifer,承压含水层；被封含水层

unconfined aquifer,非承压含水层；不受压含水层；无压含水层