What is a “perched” water table?
A perched water table is a zone of saturation “perched” on top of a low-permeability confining layer, under which unsaturated conditions exists. It contrasts with a normal water table in that, below a normal water table, porous media typically are saturated. Despite the other answer provided for your question, springs aren’t necessarily associated with perched water tables. Moreover, springs can form in association with regular (that is, not perched) aquifers.
