A well that penetrates an aquifer containing water under pressure Water in the well will rise above the water level in the aquifer; if the water pressure is great enough, the well will overflow See "Potentiometric surface," "Confined aquifer "
A well obtaining its water from an artesian or confined aquifer in which the water level in the well rises above the top of the aquifer The water level in a flowing artesian well rises above the land surface
A well where although the water table is below the ground level, geological pressures force the water up to the surface when a borehole is sunk into the water bearing rock (which underlies an impervious rock formation ) Ground water can therefore be obtained without the need for pumping