= Potentiometric surface
{wiki=Potentiometric_surface}
A potentiometric surface is a conceptual surface that represents the theoretical height to which groundwater would rise in wells that tap into a confined aquifer. It is an important concept in hydrogeology, especially for understanding groundwater movement and pressure within aquifers. In a confined aquifer, water is trapped between layers of impermeable rock or clay, creating pressure. When a well is drilled into this aquifer, the water in the well can rise above the top of the aquifer due to this pressure.
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