Observation Well
Water
A hole used to observe the ground-water surface at atmospheric pressure within soil or rock.
A non-pumping well used for observing the elevation of the water table or piezometric surface.
- — Service Hydrologist Reference Manual Glossary of Hydrologic Terms retrieved 2014-06-01
Weather
In hydrologic terms, a non-pumping well used for observing the elevation of the water table or piezometric surface