1) Substratal water source 
A well in an aquifer where the groundwater is confined under pressure and the water level will rise above the top of the confined aquifer.
a man-made spring from which water flows under natural pressure without pumping. It is dug or drilled wherever a gently dipping, permeable rock ... [4 related articles]
A well in which the water rises under hydrostatic pressure above the level of the aquifer in which it has been confined by overlying impervious strata. Often pumping is necessary to bring the water to the surface, but true artesian wells flow without assistance. The level to which water will rise in...
A well that penetrates an aquiclude to reach an aquifer containing water under pressure. Thus water
A well where the water rises and flows out to the surface because of hydrostatic pressure.
A well that penetrates an impermeable layer of rock to reach an aquifer containing water under pressure. Thus water in the well rises above the surrounding water table.
[n] - a well drilled through impermeable strata into strata that receive water from a higher altitude so there is pressure to force the water to flow upward
noun a well drilled through impermeable strata into strata that receive water from a higher altitude so there is pressure to force the water to flow upward
Well that is supplied with water rising naturally from an underground water-saturated rock layer (aquifer). The water rises from the aquifer under its own pressure. Such a well may be drilled into an aquifer that is confined by impermeable rocks both above and below. If the water table (the top o...
A well in which the water in the aquifer is under pressure that raises the water above the point that the well first encounters it.
a well in which water rises under pressure from a permeable stratum overlaid by impermeable rock.