noun
definition
An underground layer of water-bearing porous stone, earth, or gravel
example
The water in the well came from an aquifer.
Examples of aquifers in a Sentence
No ancient site is ever found built on such subterranean aquifers.
Even so, you want to be wary of the spread of radiation in the aquifers.
Known as confined aquifers, they are pools of fresh water trapped in permeable rock strata at depths of 300 to 6,000 feet.
This means that fractured chalk aquifers are hard to remediate once contamination has occurred.
The largest storage space available is in deep saltwater bearing rocks, called saline aquifers.
This water is found in rivers, streams, lakes and shallow aquifers.
Levels in the minor aquifers of eastern England are also typical for the time of year.
Levels in most of the limestone aquifers are very close to the seasonal average.
In the principal water supply aquifers, levels continue to decline gently - as they approach drought minima over wide areas.
This situation is broadly replicated in the limestone aquifers but the Permo-Triassic sandstones display much less geographical coherence.
Cornwall only has minor aquifers; groundwater is kept in cracks and fissures in the rocks and is replenished by rainfall.
Thus it is fascinating to note that limestone aquifers are the major exception to crop formations occurring over chalk substrata.
Danger exists in managing water as a resource because aquifers may be drained faster than they can be replaced.
They get into surrounding ecosystems through rainwater reaching underground aquifers, and from runoff going through storm drains and eventually ending up in streams and lakes.
Water runoff from commercial farms carry huge amounts of synthetic fertilizers and pesticides, depositing them into lakes, streams and aquifers used to supply nearby cities and towns.