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Hydrogeology of the Sulphur Springs area, Tampa, Florida
J. W. Stewart, L. R. Mills
1984, Water-Resources Investigations Report 83-4085
The Sulfur Springs area includes about 56 square miles in west-central Hillsborough County, Florida. The north-central part of the city of Tampa is highly urbanized; the north-west part of the area is rural or undeveloped. The area has numerous sinkholes, two of which are used as retention basins for urban...
Ground-water models as a management tool in Florida
C. B. Hutchinson
1984, Water-Resources Investigations Report 84-4016
Highly sophisticated computer models provide powerful tools for analyzing historic data and for simulating future water levels, water movement, and water chemistry under stressed conditions throughout the ground-water system in Florida. Models that simulate the movement of heat and subsidence of land in response to aquifer pumping also have potential...
Water-level maps of the alluvial aquifer, Northwestern Mississippi, April 1983
David M. Sumner
1984, Water-Resources Investigations Report 83-4285
Water levels were measured in about 500 wells in the Mississippi River valley alluvial aquifer in northwestern Mississippi during April 1983. Ground-water levels have declined in some areas in recent years as a result of heavy irrigation pumpage from this aquifer. Near the areas of principal recharge, along the major...
Hydrologic maps of the Price 30 x 60-minute quadrangle, Utah
H.F. McCormack, K.L. Lindskov, Bernard J. Stolp
1984, Water-Resources Investigations Report 84-4227
Four hydrologic maps of the Price 30 x 60-minute quadrangle, Utah show that the hydrology of the area is extremely variable. Normal annual precipitation ranges from less than 8 to more than 25 inches. Corresponding ranges are less than 0.1 to more than 5 inches for average annual runoff, 0.1...
Interpolating water-table altitudes in west-central Kansas using kriging techniques
L. E. Dunlap, Joseph M. Spinazola
1984, Water Supply Paper 2238
Kriging is a regionalization technique that incorporates the autocorrelation between known data values in its estimation of values at unmeasured sites. This technique is reproducible, accepts irregularly spaced data, uses only measured values closely surrounding points at which values are estimated, is an exact interpolator at measured data points, and...
Generalized potentiometric-surface map of the High Plains aquifer in Wyoming, 1981
Charles Avery, Robert A. Pettijohn
1984, Water-Resources Investigations Report 84-4033
A potentiometric-surface map shows the general configuration of the water surface for the High Plains Aquifer, which is composed of Oligocene age and younger rocks in southeastern Wyoming. The potentiometric contours are shown at 100-foot intervals on a map at a scale of 1:250,000. The High Plains Aquifer in Wyoming...
Geohydrology of the valley-fill aquifer in the Cohocton area, upper Cohocton River, Steuben County, New York
David B. Terry, Timothy S. Pagano, Martha L. Shaw, Arlynn W. Ingram
1984, Water-Resources Investigations Report 85-4040
The Cohocton valley-fill aquifer, composed of outwash, kame, and alluvial sand and gravel, is highly productive and is in hydraulic contact with the Cohocton River. Potential well yields range from 50 to more than 1,000 gallons per minute. Most of the aquifer is under shallow water-table conditions and vulnerable to...
Depth and thickness of selected units in Upper Permian, Upper Jurassic, and Lower Cretaceous rocks in southwestern Kansas
Jack Kume, Joseph M. Spinazola
1984, Water-Resources Investigations Report 83-4095
As ground-water reserves decline in the Ogallala aquifer in an area of about 17,400 square miles in 26 counties of southwestern Kansas, sandstone aquifers in underlying Upper Jurassic and Lower and Upper Cretaceous rocks may be developed to supplement or replace the Ogallala as a source of water for some...
Enhanced job control language procedures for the SIMSYS2D two-dimensional water-quality simulation system
G.A. Karavitis
1984, Water-Resources Investigations Report 84-4052
The SIMSYS2D two-dimensional water-quality simulation system is a large-scale digital modeling software system used to simulate flow and transport of solutes in freshwater and estuarine environments. Due to the size, processing requirements, and complexity of the system, there is a need to easily move the system and its associated files...
The evolution of the southern California uplift, 1955 through 1976
Robert O. Castle, Michael R. Elliot, Jack P. Church, Spencer H. Wood
1984, Professional Paper 1342
The southern California uplift culminated in 1974 as a 150- km-wide crustal swell that extended about 600 km eastward and east-southeastward from Point Arguello to the Colorado River and Salton Sea, respectively; it was characterized by remarkably uniform height changes between 1959 and 1974 of 0.30-0.35 m over at least...