or water-table) aquifer: An aquifer in which the water table is at the upper boundary of the ground-water flow system that is at atmospheric pressure.
Water that is in direct contact vertically with the atmosphere through open spaces in permeable material
in reference to aquifers, it describes a condition whereby water-bearing rocks are at atmospheric pressure, i.e., water table conditions.
Conditions in which the upper surface of the Zone of Saturation forms a water table under atmospheric pressure.
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To present participles which come from intransitive verbs, or are themselves employed as adjectives, to mark the absence of the activity, disposition, or condition implied by the participle;
free from confinement or physical restraint