unsaturated zone


Also found in: Acronyms.

unsaturated zone

[¦ən′sach·ə‚rād·əd ′zōn]
(geology)
References in periodicals archive ?
coli within 30 cm of unsaturated zone, this was deemed a treatment failure.
Their solution also handled the infiltration from the unsaturated zone to water table.
The scheme of hysteretic flow in this paper deals with numerical solutions of the mixed Richards equation to simulate hysteretic transient flow in the unsaturated zone.
The field data was obtained for all conditions; infiltration in unsaturated zone (stage 1), infiltration in capillary zone (stage 2) and infiltration in saturated zone (stage 3).
Beach and McCray (2003) used HYDRUS-2D to predict unsaturated flow within SAS, and described a strong relationship between the biomat zone hydraulic properties and the steady-state (long-term) infiltration rates within the unsaturated zone.
As the injected air moves through the soil horizontally and vertically it "strips" the volatile and semivolatile organic contaminants from the soil and also helps to flush the contaminants into the upper, unsaturated zone of the soil.
Temperature redistribution within the unsaturated zone is represented using a numerical solution to the heat conduction equation.
Contamination moved downward through the unsaturated zone via bulk transport in response to gravity and infiltration rainfall.
The database used to generate the images contains surface topography, unsaturated zone water table elevations, the location of groundwater samples taken for chemical analysis, and the results of the lab analyses of contaminant concentrations.
Researchers installed pressure/vacuum lysimeters in the unsaturated zone of six landfills.
In others, contaminants in that unsaturated zone comprise the entire problem.