Note that, in Figure 1, p/[gamma] is the pressure head at the observation point relative to the potentiometric surface, not the water table.
In groundwater flow, the potential is the hydraulic head Potentiometric surface Map of the map: three-dimensional potential surface, represented as contours lines of equal potential, or equal hydraulic head Present-day: Describes current conditions, at 0 Ma, as opposed to in the geologic past PTU: Percent of total uplift Q: Flowrate [[L.sup.3] [T.sup.-1]] [Q.sub.w]: Flow rate specified at the west end of the model q: Flux; flowrate [[L.sup.3] [T.sup.-1]] per unit area [[L.sup.2]], so equal to [L [T.sup.-1]] [q.sub.w]: Flux specified at the west end of the model [q.sub.h]: Flux in the horizontal, h, direction resp.: Respectively S: Storage coefficient (storativity).
Caption: Figure 9: Map of potentiometric surface (hydraulic head contour lines in meters) in rocks of Wolfcampian age, after Nelson et al.
The phreatic or potentiometric surface is assumed to be level prior to pumping.
[h.sub.1], [h.sub.2] = height of the potentiometric surface at [r.sub.1], [r.sub.2] above the bottom of the aquifer (L).
Pumping test data can also be used to calculate a radius of influence, which is the distance at which there is negligible change in the phreatic or potentiometric surface between static and pumped conditions.
The thickness of the aquifer system is up to 250 m and the absolute height of the potentiometric surface
ranges from 50 to 130 m.
Rettman (1983) measured the water levels in the Evangeline in the Kingsville area during 1982 and found a large cone of depression in the potentiometric surface which occurs below Kingsville.
-- The specific objectives of this study were to: (1) simulate the potentiometric surfaces computed by Groschen (1985); (2) determine the effects of groundwater withdrawals from uranium mining operations on the potentiometric surface of the Evangeline aquifer; (3) test several boundary conditions used by Groschen (1985) in a 38-row by 38-column grid model and determine the appropriate use of the boundary conditions; and (4) determine if there may be any significant dewatering of the Evangeline Aquifer due to in situ leach mining operations at the Kingsville Dome plant (currently in restoration phase).
The potentiometric surface as defined by Groschen (1985) is the elevation at which groundwater levels would stand in tightly cased wells.
10:30 DECLINES IN POTENTIOMETRIC SURFACES OF NEOGENE AQUIFERS, PERRY COUNTY, MISSISSIPPI
Cross-sections and potentiometric surfaces maps were then constructed for the principal aquifers for different years.