Question

The zone of aeration in a groundwater profile does not include ___________

(a) capillary zone

(b) soil water zone

(c) intermediate zone

(d) saturation zone

This question was addressed to me during an interview for a job.

This intriguing question comes from Factor Controlling Occurrence of Ground Water in section Ground Water for Irrigation through Wells and Tubewells of Irrigation Engineering

Answer 1

Correct option is (d) saturation zone

The explanation: Depending upon the number of interstices present, the aeration zone is divided into three classes. The capillary fringe is a continuation of the zone of saturation and does contain some interstitial water. Soil zone is the depth from the surface penetrated by the roots of vegetation and the remaining intermediate part is intermediate zone.