The upper surface of the zone of saturation in an unconfined aquifer.
The highest level reached by underground water, especially during spring; below this level, spaces between soil particles are sometimes and/or always filled by water.
the distance below ground where the groundwater can be located Return to Previous Page.
the upper limit of the groundwater.
The upper surface of the zone of saturation (all pores of subsoil filled with water), except where the surface if formed by an impermeable body.