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Map Showing Cumulative Thickness of Sandstone in the Eagle Sandstone and Telegraph Creek Formation, Montana

Description: From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northern Great Plains. The purpose of this map, which is a product of that study, is to show the cumulative thickness of sandstone in the combined Eagle Sandstone and Telegraph Creek Formation.
Date: 1982
Creator: Feltis, R. D.
Partner: UNT Libraries Government Documents Department

Map Showing Altitude of the Top of the Lakota Formation and Equivalent Rocks, Montana

Description: Introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northern Great Plains. The purpose of this map, which is a product of that study, is to show the altitude of the top of the Lakota Formation and equivalent rocks. Other maps show the total thickness (Feltis, 1982a), cumulative thickness of sandstone (Feltis, 1982b), and potentiometric surface of water (Levings, 1982) in the Lakota Formation and equivalent rocks. These maps are part of a series that describes the geology and potentiometric surface of selected rock units of Jurassic or younger age in the plains area of Montana.
Date: 1982
Creator: Feltis, R. D.
Partner: UNT Libraries Government Documents Department

Map Showing Cumulative Thickness of Sandstone in the Lakota Formation and Equivalent Rocks, Montana

Description: Introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northern Great Plains. The purpose of this map, which is a product of that study, is to show the cumulative thickness of sandstone in the Lakota Formation and equivalent rocks. Other maps show the altitude of the top (Feltis, 1982a), total thickness (Feltis, 1982b), and potentiometric surface of water (Levings, 1982) of the Lakota Formation and equivalent rocks. These maps are part of a series that describes the geology and potentiomentric surface of a selected rock units of Jurassic or younger age in plains area of Montana.
Date: 1982
Creator: Feltis, R. D.
Partner: UNT Libraries Government Documents Department

Chemical-Quality Reconnaissance of the Water and Surficial Bed Material in the Delaware River Estuary and Adjacent New Jersey Tributaries, 1980-81

Description: From abstract: This report presents chemical-quality data collected from May 1980 to January 1981 at several locations within the Delaware River estuary and selected New Jersey tributaries.
Date: June 1982
Creator: Hochreiter, Joseph J., Jr.
Partner: UNT Libraries Government Documents Department

A Numerical Model to Evaluate Proposed Ground-Water Allocations in Southwest Kansas

Description: Abstract: A computer model was developed to calculate the drawdown, due to a proposed well, at all existing wells in the section of the proposed well and at all wells in the adjacent eight sections. The depletion expected in the 9-square-mile area due to all existing wells and the proposed well is computed and compared with allowable limits defined by the Southwest Kansas Groundwater Management District No. 3. An optional program permits the evaluation of allowable depletion for one or more townships. All options are designed to run interactively, thus allowing for immediate evaluation of proposed ground-water withdrawals.
Date: 1982
Creator: Jorgensen, D. G.; Grubb, H. F.; Baker, C. H., Jr.; Hilmes, G. E. & Jenkins, E. D.
Partner: UNT Libraries Government Documents Department

Modifications and Corrections to the Finite-Difference Model for Simulation of Three-Dimensional Ground-Water Flow

Description: From abstract: This report describes modifications that are incorporated into the finite-difference model for simulation of ground-water flow in three dimensions by Trescott, and Trescott and Larson. [It] also describes corrections to the model that eliminate errors in the equation formulation and in mass-balance computations for certain types of simulations.
Date: 1982
Creator: Torak, Lynn J.
Partner: UNT Libraries Government Documents Department

Preliminary Evaluation of the Ground-Water-Flow System in the Twin Cities Metropolitan Area, Minnesota

Description: From abstract: A preliminary quasi-three-dimensional finite-difference ground-water-flow model of the seven-county Twin Cities Metropolitan area was constructed and used to evaluate parameter sensitivity and adequacy of available data.
Date: August 1982
Creator: Guswa, J. H.; Siegel, D. I. & Gillies, D. C.
Partner: UNT Libraries Government Documents Department

Aquifer Test Results, Green Swamp Area, Florida

Description: From abstract: "An aquifer test conducted in the Green Swamp area December 15-16, 1975 was designed to stress the uppermost part of the Flordian aquifer so that the leakage characteristics of the overlying confining bed could determined." This report includes those results.
Date: 1982
Creator: Tibbals, C. H. & Grubb, H. F.
Partner: UNT Libraries Government Documents Department

Method for Relating Suspended-Chemical Concentrations to Suspended-Sediment Particle-Size Classes in Storm-Water Runoff

Description: From introduction: This report outlines procedures to relate suspended-chemical concentrations (nutrients, metals, or organic constituents) associated with suspended sediments in storm-water runoff to suspended-sediment particle-size classes based on settling velocities.
Date: 1982
Creator: Rinella, Joseph F. & McKenzie, Stuart W.
Partner: UNT Libraries Government Documents Department

Water Table in Rocks of Cenozoic and Paleozoic Age, 1980, Yucca Flat, Nevada Test Site, Nevada

Description: Base from U.S. Geological Survey; Oak Spring, Plutonium Valley, Tippipah Spring, and Yucca Flat 1:24,000, 1960; Jangle Ridge, Mine Mountain, Paiute Ridge, Rainier Mesa, and Yucca Lake 1:24,000, 1961; 20,000 foot grid based on Nevada coordinate system, central zone
Date: 1983
Creator: Doty, G. C. & Thordarson, William
Partner: UNT Libraries Government Documents Department

Major Geochemical Processes Related to the Hydrology of the Madison Aquifer System and Associated Rocks in Parts of Montana, South Dakota, and Wyoming

Description: From introduction: The overall purpose of this study were twofold: (1) To determine where greatest yielding wells at shallowest depths would produce water of suitable quality for municipal and industrial supplies; and (2) to determine regional effects of additional water development on the hydrologic system.
Date: 1983
Creator: Busby, John F.; Lee, Roger W. & Hanshaw, Bruce B.
Partner: UNT Libraries Government Documents Department

Hydrogeology and Simulation of Water Flow in the Kootenai Aquifer of the Judith Basin, Central Montana

Description: From purpose and scope: The purpose of this report is (1) to describe the flow system within the Kootenai Formation, which is the principal aquifer, and (2) to describe the interaction between the Kootenai and overlying and underlying Mesozoic aquifers.
Date: September 1983
Creator: Levings, Julianne F.
Partner: UNT Libraries Government Documents Department

A Digital Model of the Floridian Aquifer, North of Tampa, Florida

Description: From purpose and scope: The purpose of this report is to describe the development and calibration of a regional digital model of the Floridian aquifer in the Tampa Bay area. This model can be used to provide regional analyses of the effects of present and proposed pumping from the Floridian aquifer.
Date: October 1977
Creator: Robertson, Alton F. & Mallory, Michael J.
Partner: UNT Libraries Government Documents Department

Water Use in Wisconsin, 1979

Description: From abstract: This report summarizes the uses of water in Wisconsin for 1979, except aesthetics, navigation, and recreational use.
Date: July 1982
Creator: Lawrence, C. L. & Ellefson, B. R.
Partner: UNT Libraries Government Documents Department

Computer Simulation Model of the Pleistocene Valley-Fill Aquifer in Southwestern Essex and Southeastern Morris Counties, New Jersey

Description: From purpose and scope: The purpose of the present study by the U.S. Geological Survey in cooperation with the Division of Water Resources of the New Jersey of Environmental Protection is to make a quantitative hydrologic analysis of the known buried valley-fill aquifer in southwestern Essex and southeastern Morris County Counties in order to provide water-resources planners with the hydrologic bases to plan ground-water development and to allocate available water.
Date: May 1976
Creator: Meisler, Harold
Partner: UNT Libraries Government Documents Department

Primary Productivity by Phytoplankton in the Tidal, Fresh Potomac River, Maryland, May 1980 to August 1981

Description: Purpose and scope: The purpose of this study was to determine primary productivity and respiration of the fresh, tidal Potomac River. The data will be used by the authors and other researchers involved in modelling chemical and biological properties to calculate phytoplankton growth rates. Methods are documented in detail so that the report could serve as a reference. The report covers the period from May 1980 through August 1981. Five stations were selected for study that are representative of biologically important reaches of the fresh, tidal Potomac River.
Date: 1983
Creator: Cohen, R. H. & Pollock, Sheryl O.
Partner: UNT Libraries Government Documents Department

Hydrologic Relations Between Lakes and Aquifers in a Recharge Area near Orlando, Florida

Description: Abstract: The three lakes investigated gain water- from adjoining water-table aquifer and lose water to Floridan aquifer by downward leakage. Net seepage (net exchange of water between lake and aquifers) can be estimated by equation S = AX + BY, where S is net seepage, X represents hydraulic gradient between lake and water-table aquifer, A is lumped parameter representing effect of hydaulic conductivity and cross-sectional area of materials in flow section of water-table aquifer, Y is head difference between lake level and potentiometric surface of Floridan aquifer, and B is lumped parameter representing effect of hydraulic conductivity, area, and thickness of materials between lake bottom and Floridan aquifer. If values of S, X, and Y are available for two contrasting water-level conditions, coefficients A and B are determinable by solution of two simultaneous equations. If the relation between lake- and ground-water level is same on all sides of the lake with regard to each aquifer and if X and Y are truly representative of these relations, then X and Y terms of equation provide valid estimates of inflow to lake from water-table aquifer and outflow from lake to Floridan aquifer.
Date: August 1976
Creator: Lichtler, W. F.; Hughes, G. H. & Pfischner, F. L.
Partner: UNT Libraries Government Documents Department

Waterlogging in an Alluvial Aquifer near Lake Minnequa, Pueblo, Colorado

Description: Abstract: The Lake Minnequa area, located immediately south of the Arkansas River, is mantled with as much as 46 feet (14 meters) of alluvium covering bedrock of Pierre Shale and Niobrara Formation. Surface water enters the area by the Minnequa Canal and the St. Charles Flood Ditch. The water is stored in Lake Minnequa and other reservoirs. Seepage from St. Charles Reservoirs No. 2 and No. 3 is the major source of water to the alluvial aquifer. The depth of the water table ranges from 0 to 40 feet (0 to 12.2 meters). A 0.5-square-mile (1.3-square-kilometers) area immediately south of Lake Minnequa has a water table less than 6 feet (1.8 meters) below land surface. Lake Minnequa is the principal cause of the shallow water table and resulting waterlogged soil. The bedrock hill east of Lake Minnequa and ground-water flow also contribute to the problem. To eliminate the waterlogging problem, the water table would have to be at least 6 feet (1.8 meters) below land surface. Possible alternatives for eliminating the problem include lowering the water, level in Lake Minnequa, placing a network of dewaterinq wells, or constructing a drainage system in the waterlogged area.
Date: July 1976
Creator: Emmons, Patrick J.
Partner: UNT Libraries Government Documents Department

A Model for Flow Through a Glacial Outwash Aquifer in Southeast Franklin County, Ohio

Description: Abstract: A glacial outwash aquifer of about 70 square miles in the Scioto River valley southeast of Columbus, Ohio, was modeled as a potentially major source of water. The model was constructed from available hydrologic data: Records of precipitation, well hydrographs, well logs, two ground-water level surveys, and analyses of six aquifer tests. Utilizing this array of data, water levels determined from a series of steady-state simulations of different hydraulic conductivity distributions were calibrated against measured (December 1977) ground-water levels. The simulations that provided the best matches used two hydraulic conductivity distributions: One was an areally varying hydraulic conductivity distribution; the other an areally uniform hydraulic conductivity (40 feet per day) distribution. After these more probable hydraulic conductivity distributions were found, they were utilized in steady state maximal pumping simulations. The maximal well-field yield of these simulations was 20.5 million gallons per day for the areally varying hydraulic conductivity distribution, and 11.3 million gallons per day for the areally uniform hydraulic conductivity. Sensitivity of well yield to changes in well position and streambed leakance changes was investigated also.
Date: November 1980
Creator: Weiss, Emanual J. & Razem, Allan C.
Partner: UNT Libraries Government Documents Department

A Two-Dimensional Finite-Element Model Study of Backwater and Flow Distribution at the I-10 Crossing of the Pearl River Near Slidell, Louisiana

Description: From introduction: This report presents the application of FESWMS to the Pearl River and illustrates the usefulness of the two-dimensional model in analyzing steady-state flow with both lateral and longitudinal variations.
Date: 1983
Creator: Gilbert, J. J.; Lee, Jonathan K.; Froehlich, David C. & Wiche, Gregg J.
Partner: UNT Libraries Government Documents Department

Problems of Rising Ground-Water Levels in Urban Areas with Special Reference to the Louisville, Kentucky Area

Description: From abstract: Rising ground-water levels are a problem in many urban areas in the United States because of the potential damage to man-made structures such as basements, foundations, utility lines, and septic tank systems. A decrease in ground-water withdrawals, above average precipitation, recharge from irrigation water, and leaky water lines and sewers are some of the causes of water level rises in cities such as San Bernardino, California; Greely and Fort Collins, Colorado; New York City boroughs of Brooklyn and Queens; and Louisville, Kentucky. Dewatering is necessary in many urban areas to maintain water levels below structures.
Date: 1983
Creator: Whitesides, Douglas V.; Faust, Robert J. & Zettwoch, Douglas D.
Partner: UNT Libraries Government Documents Department