What is the term used for the upper limit of the zone of aeration, representing the top surface of the underground water table?

💡 Solution & Explanation

The water table defines the upper boundary of the zone of saturation, where pore spaces in subsurface geologic media are completely filled with groundwater. Concepts such as the capillary fringe lie directly above this table where water ascends via capillary action, while the phreatic surface is synonymous with the water table itself. An aquiclude refers to an impermeable geological formation that restricts groundwater movement.