An aquifer is an underground layer of rock or soil that holds water, like a natural underground reservoir. It supplies water to wells and springs, and it's important for providing water to people, plants, and animals. Full definition
It lives in underground aquifers in Slovenia, surfacing only when floodwaters sweep it from its lair. (sciencemag.org)
A 12 percent increase in the rate of aquifer recharge from added precipitation, combined with a projected 3 - foot rise in sea level by the end of the century, would raise groundwater levels in some parts of the city by an additional foot — up to 4 feet higher than current levels. (scientificamerican.com)
Some scientists have proposed that erupting cryovolcanoes or deep underground aquifers of liquid methane occasionally recharge Titan with methane. (sciencemag.org)