Unsaturated Zone: The area above the water table where soil pores are not fully saturated, although some water may be present.
Upper Detection Limit: The largest concentration that an instrument can reliably detect.
unsaturated zone The subsurface zone between the land surface and water table in which the pore spaces are only partially filled with water. Also called zone of aeration.
Unsaturated Zone: An area, usually between the land surface and the water table, where the openings or pores in the soil contain both air and water. Also called the zone of aeration. DIAGRAM ...
Unsaturated zone: See aeration zone.
V
Vapor: The state of water in the hydrologic cycle in which individual molecules are highly energized and move about freely; also known as gas/gaseous.
Unsaturated Zone: portion of the soil profile which contains both air and water. Water in this zone cannot enter a well.
Vector: a carrier, typically an insect or rodent, capable of transmitting a disease.
UNSATURATED ZONE
The zone above the water table in which soil pores or fissures are less than totally saturated. It is also called the vadose zone or the zone or aeration.
upstream/downstream design ...
Unsaturated zone
Underground soil and gravel that could contain groundwater, but lies above the aquifier. This is in contrast to a saturated zone, where the space between soil particles is filled with water.
Unsaturated Zone: The zone between the land surface and the water table. It includes the root zone intermediate zone, and capillary fringe. The pore spaces contain water, as well as air and other gases at less than atmospheric pressure.
Compare unsaturated zone. secondary treatment Stage of wastewater treatment wherein bacteria are used to break down organic materials and significantly reduce biochemical oxygen demand.
Vadose Zone- The unsaturated zone in a soil where chemical processes are at their most active.
Infiltration The movement of water from the surface of the land through the unsaturated zone and into the groundwater. This occurs during and immediately after precipitation events. It can also occur at the bottom of lakes and rivers.
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The water contained in the pore space of the unsaturated zone.
Source: Terms of the Environment
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An aquifer in which the water pressure is sufficiently high to push the water up through the geologic materials of the aquifer and overlying unsaturated zone an out onto the ground surface.
Flowmeter ...
 See also: Unsaturated, Water, Table, Soil, Water table
  
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