Zone of Aeration The comparatively dry soil or rock located between the ground surface and the top of the Water Table. A zone immediately below the surface of the ground, in which the openings are partially filled with air, and partially with water trapped by molecular attraction. Generally subdivided into: (a) belt of soil moisture, (b) intermediate belt, and (c) capillary fringe. Also referred to as the Unsaturated Zone or the Vadose Zone.
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Author of the Water Words Dictionary source of text: Gary A. Horton
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