The upper surface of an isolated body of groundwater that is perched above and separated from the main body of groundwater by an aquiclude.
A quantity of groundwater that lies above the regional water table because an underlying lens of impermeable rock or sediment prevents the water from sinking down to the regional water table.
Perched Water Table - Occurs when a low permeability material, located above the water table, blocks or intercepts the downward flow of water from the land surface. Water mounds up above the impermeable material, creating another saturated zone with a water table.
These are small water tables which can form above the main water table and are caused, for example, by layers of clay that prevent water moving down to the main water table.
A water table that is isolated from and higher than the regional water table. This can occur when a hilltop is underlain by an impermeable rock unit. Infiltrating waters stack up on the impermeable unit, creating an isolated water table that is higher than the water table of the surrounding land.
In hydrology, the upper surface of a body of free ground water in a zone of saturation, separated by unsaturated material from an underlying body of ground water in a differing zone of saturation.
A water table usually of limited area maintained above the normal free water elevation by the presence of an intervening impermeable confining strata.
A saturated area that lies within a zone of aeration.
a water table lying above a layer of impervious soil or rock which surfaces on a hillside as a spring.
The permanent or temporary water table of a discontinuous saturated zone in a soil.
the upper limit of a zone of saturation in soil, separated by a relatively impermeable unsaturated zone from the main body of groundwater below.
See Water Table.
a perched water table is a lens of water that is trapped by an impervious soil strata such as a clay above the true water table; the impervious soil strata prevents the perched water from percolating downward to the actual water table; shallow perched water tables are common north of I-10 in the Greater Houston Area and can play havoc with slab-on-ground foundations
Water table of a relatively small ground-water body lying above the general ground-water body.
Water table that is positioned above the normal water table for an area because of the presence of a impermeable rock layer.