- Artesian Well
(1) A well bored down to the point, usually at great depth, at which the water pressure is so great that the water is forced to the surface.
The name is derived from the French region of Artois, where the oldest well in Europe was bored in 1126.
(2) A well tapping a confined or artesian aquifer in which the static water level stands above the top of the aquifer.
The term is sometimes used for all wells that tap confined water. Wells with water levels above the unconfined water table have positive artesian head (pressure), and those with water level below the unconfined water table have negative artesian head.
A flowing artesian well has a water level above the earth's surface.
(3) The pressure of water in an artesian aquifer is generally significantly greater than atmospheric pressure.
(4) Artesian water is ground water under pressure when tapped by a well and because of that is able to rise above the level at which it is first encountered, which may or may not be at ground level.
The pressure is called "artesian pressure", and the formation containing artesian water is an "artesian aquifer" or "confined aquifer".
(1) Art bored a good well, and though it was not under pressure, we like to call it his "artisan artesian well, well done".
(2) The first thing I always ask is "Is your artesian well?" If so, I have a drink to celebrate.
(3) Artesian pressure at work is what you see when the water comes gushing up to meet you.
(4) Artesian water sometimes flows right up out of the ground and jumps on you. But at least it never sniffs your crotch.