In unconfined aquifers, the solution to the 3D form of the equation is complicated by the presence of a free surface water table boundary condition : in addition to solving for the spatial distribution of heads, the location of this surface is also an unknown.
12.
Specific yield ( " S y " ) is also a ratio between 0 and 1 ( " S y " d " porosity ) and indicates the amount of water released due to drainage from lowering the water table in an unconfined aquifer.
13.
Lake Barco is a sinkhole lake, typical of the region, where unconsolidated deposits on the surface have slumped into the highly soluble limestone of the upper Floridan aquifer . The organic-rich sediments of the lake bottom lie on an unconfined aquifer made up mostly of sands.
14.
Aquifers are broadly classified as being either confined or unconfined ( water table aquifers ), and either saturated or unsaturated; the type of aquifer affects what properties control the flow of water in that medium ( e . g ., the release of water from storage for confined aquifers is related to the storativity, while it is related to the specific yield for unconfined aquifers ).
15.
Summation or integration of the energy flux in a vertical cross-section of unit width ( say 1 m ) from the lower flow boundary ( the impermeable layer or base ) up to the water table in an unconfined aquifer gives the energy flow " Fe " through the cross-section in " E " / day per m width of the aquifer.
