aquifer

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Related to Aquitard: Aquiclude, aquifuge

aquifer

a reservoir of ground water found in underground rock, sand and gravel layers.
References in periodicals archive ?
However, mineral Quaternary sediments do not form a sufficient aquitard between the mire and the limestone in order to preserve the Selisoo mire in case of groundwater lowering within carbonate rocks.
Neville interviewed Mayor Karen Farbridge (who wants the mining to stop until real mitigation assurances are in place), two representatives of local advocacy group Wellington Water Watchers (who want the extractors to post a bond for the estimated cost of fallout), and University of Guelph water resources engineer Hugh Whiteley (who says preserving the aquitard is just as important as protecting the aquifer).
The lower aquitard is a reddish-brown lodgement till layer that tends to be dominantly dayey of silty in composition.
A relatively impermeable layer underlying an unconfined aquifer is the aquitard.
A relatively impermeable layer that restricts vertical flow is called an aquitard (or, if very restrictive, aquiclude).
These features are caused by groundwater seepage from a dolomitic claystone of the Salem Formation, which acts as an aquitard to groundwater flow from the overlying closed karst aquifer.
These aquifer systems are separated by the Lukati-Lontova aquitard ([[?
A layer of lacustrine clay within the bluffs acted as an aquitard, perching water and creating a saturated layer of marerial in the glacial till above that eventually failed and flowed downslope into Lake Michigan.
At low mixing rates, very old water is supplied to the aquifer, but the water in the aquitard remains old," Bethke says.