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Water-quality characteristics of inflow to and outflow from Falls Lake, North Carolina, 1982-87
R. G. Garrett
1990, Water-Resources Investigations Report 90-4097
Falls Lake, an 11,300-acre reservoir in the north-central Piedmont of North Carolina, was completed in December 1983. Hydrologic data were collected at seven inflow sites and one outflow site between 1982 and 1987 to define water-quality characteristics. Data include streamflow data and 56 physical and chemical characteristics of streamwater. Concentrations...
Water quality characteristics of inflow to and outflow from B. Everett Jordan Lake, North Carolina, 1982-86
R. G. Garrett
1990, Water-Resources Investigations Report 90-4096
B. Everett Jordan Lake, a 13,900-acre reservoir in the north-central Piedmont of North Carolina, was completed in February 1982. Hydrologic data were collected at four inflow sites and one outflow site to define water-quality characteristics. Data include streamflow data and 56 physical and chemical characteristics of streamwater. Concentrations of some...
Water resources of Codington and Grant counties, South Dakota
D. S. Hansen
1990, Water-Resources Investigations Report 89-4147
The primary sources of surface water in Codington and Grant Counties are Lakes Kampeska and Pelican and numerous potholes in western Codington County. Seasonal variations in streamflow and lake levels are directly related to seasonal variations in precipitation and evapotranspiration. Dissolved-solids concentrations in water from streams and lakes increase as...
Lithology of basin-fill deposits in the Albuquerque-Belen basin, New Mexico
C. A. Kaehler
1990, Water-Resources Investigations Report 89-4162
Sediments that fill the Albuquerque-Belen basin in central New Mexico comprise an aquifer that supplies water to approximately one-third the population of the State. Analysis of driller 's logs and geophysical logs indicate that an area of fine-grained deposits generally underlies the west-central part of the basin. Coarse-grained deposits are...
Geohydrology and ground-water geochemistry at a sub-arctic landfill, Fairbanks, Alaska
J. S. Downey
1990, Water-Resources Investigations Report 90-4022
The Fairbanks-North Star Borough, Alaska, landfill is located on silt, sand, and gravel deposits of the Tanana River flood plain, about 3 miles south of the city of Fairbanks water supply wells. The landfill has been in operation for about 25 years in this sub-arctic region of discontinuous permafrost. The...
PRECONDITIONED CONJUGATE-GRADIENT 2 (PCG2), a computer program for solving ground-water flow equations
Mary C. Hill
1990, Water-Resources Investigations Report 90-4048
This report documents PCG2 : a numerical code to be used with the U.S. Geological Survey modular three-dimensional, finite-difference, ground-water flow model . PCG2 uses the preconditioned conjugate-gradient method to solve the equations produced by the model for hydraulic head. Linear or nonlinear flow conditions may be simulated. PCG2 includes...
Hydrogeology of aquifers in Cretaceous and younger rocks in the vicinity of Onslow and southern Jones counties, North Carolina
W.L. Lyke, M. D. Winner Jr.
1990, Water-Resources Investigations Report 89-4128
Unconsolidated sediments in Onslow and Jones Counties, North Carolina overlie crystalline basement rocks and range in thickness from about 700 ft to more than 1,800 ft, thickening toward the east. This material is composed of permeable sand and limestone interlayered with relatively impermeable clay and silt beds. Sediments are divided...
Ground-water pumpage and water-level declines in the Peedee and Black Creek aquifers in Onslow and Jones counties, North Carolina, 1900-86
W.L. Lyke, A. R. Brockman
1990, Water-Resources Investigations Report 89-4197
Two aquifers in sediments of Cretaceous age, The Peedee and Black Creek aquifers, have become a major source of freshwater in Onslow and Jones Counties in North Carolina since about 1960. Prior to 1960, most water systems in this area withdrew water from younger sand or limestone beds that overlie...
Techniques for estimating flood-peak discharges of rural, unregulated streams in Ohio
G. F. Koltun, J.W. Roberts
1990, Water-Resources Investigations Report 89-4126
Multiple-regression equations are presented for estimating flood-peak discharges having recurrence intervals of 2, 5, 10, 25, 50, and 100 years at ungaged sites on rural, unregulated streams in Ohio. The average standard errors of prediction for the equations range from 33.4% to 41.4%. Peak discharge estimates determined by log-Pearson...
Distribution of wells in the central part of the western San Joaquin Valley, California
J. A. Gronberg, Kenneth Belitz, S.P. Phillips
1990, Water-Resources Investigations Report 89-4158
Information from 5,860 wells in the central part of the western San Joaquin Valley, California, was collected from several sources and compiled into a common data base. Only 2,547 wells had sufficient information for classification into four categories based on the hydrogeology: wells perforated in the semiconfined zone at depths...
Geohydrology and numerical model analysis of ground-water flow in the Pullman-Moscow area, Washington and Idaho
W. E. Lum II, James L. Smoot, Dale R. Ralston
1990, Water-Resources Investigations Report 89-4103
The geohydrology of the Pullman, Washington-Moscow, Idaho area was investigated by mapping geohydrologic units, determining the distribution of hydraulic head in each unit, and determining some of the components of the water budget. This information was used to construct a three- dimensional groundwater-flow model that incorporates three layers--a surficial loess...