perched water table


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perched water table

[′pərcht ′wȯd·ər ‚tā·bəl]
(hydrology)
The water table or upper surface of a body of perched water. Also known as apparent water table.

perched water table

A water table (usually of limited area) maintained above the normal free water elevation by the presence of an intervening relatively impervious confining strata.
References in periodicals archive ?
Figure 8 shows the extent and connectivity of the perched water table within the AB horizon as indicated by saturated conditions (water content greater than 35%) during peak stream flow for two storms: (A) Jan.
The perched water table during the second storm occupied isolated areas with less connectivity to the stream, as indicated by areas of yellow (unsaturated) and green (saturated) intersecting the blue flow lines (fig.
Perched water table observation wells were installed to a depth of 0.
The depth to the perched water table in the control and the raised beds was continuously monitored at Beverley and Woodanilling in 1998 and 1999.
Where the pallid zone comes close to the surface and the first and second perched water tables merge, waterlogging problems are compounded.
These problems were exacerbated in those areas where there were also waterlogging problems caused by water originating from the two perched water tables.
As a result, a perched water table often builds up during winter in the yellow brown B-horizon, often reaching the surface during wet periods (Fig.