Glossary of Karst and Cave Terms
phreas, phreatic water
(From the Greek word meaning well.) 1. The zone of saturated rock below the water table, within which all conduits and subconduits are water filled (sometimes referred to as the flooded, phreatic or saturated zone). Commonly the phreatic zone is considered as being subdivided into an upper (shallow phreatic) zone and a lower stagnant phreatic zone . 2. Water in the zone of saturation; water below the water table . See also bathyphreatic, bathyphreatic zone, ground water, phreas.