Hydrogeology, water quality, water budgets, and simulated responses to hydrologic changes in Santa Rosa and San Simeon Creek ground-water basins, San Luis Obispo County, California
Eugene B. Yates, Kathryn M. Van Konyenburg
1998, Water-Resources Investigations Report 98-4061
Santa Rosa and San Simeon Creeks are underlain by thin, narrow ground-water basins that supply nearly all water used for local agricultural and municipal purposes. The creeks discharge to the Pacific Ocean near the northwestern corner of San Luis Obispo County, California. The basins contain heterogeneous, unconsolidated alluvial deposits and...
Spatial variation in saturated hydraulic conductivity of sediments at a crude-oil spill site near Bemidji, Minnesota
Michael L. Strobel, G. N. Delin, Carissa J. Munson
1998, Water-Resources Investigations Report 98-4053
Saturated hydraulic conductivity of aquifer sediments at a crude-oil spill research site near Bemidji, Minnesota were examined using pneumatically-induced head-difference tests and packer/vacuum system tests. Results from slug tests on 58 wells show that hydraulic conductivity varies both horizontally and vertically in the range from about 10-7 to 10-4 meters...
Geomorphology, flood-plain tailings, and metal transport in the upper Clark Fork Valley, Montana
J. Dungan Smith, J. H. Lambing, D. A. Nimick, Charles Parrett, Michael Ramey, William Schafer
1998, Water-Resources Investigations Report 98-4170
No abstract available....
Delineation of contributing areas to selected public-supply wells, western Cape Cod, Massachusetts
John P. Masterson, Donald A. Walter, Denis R. LeBlanc
1998, Water-Resources Investigations Report 98-4237
No abstract available. ...
Lithology and fracture characterization from drilling investigations in the Mirror Lake area, Grafton County, New Hampshire
C. D. Johnson, A.H. Dunstan
1998, Water-Resources Investigations Report 98-4183
The lithology and fracture network of the bedrock aquifer in the Mirror Lake area were characterized from hydrogeologic data collected from 1979-95 in Grafton County, N.H. The collection of these data is an integral part of an ongoing multidisciplinary study by the U.S. Geological Survey to characterize groundwater flow and...
An implicit dispersive transport algorithm for the US Geological Survey MOC3D solute-transport model
K.L. Kipp Jr., Leonard F. Konikow, G.Z. Hornberger
1998, Water-Resources Investigations Report 98-4234
This report documents an extension to the U.S. Geological Survey MOC3D transport model that incorporates an implicit-in-time difference approximation for the dispersive transport equation, including source/sink terms. The original MOC3D transport model (Version 1) uses the method of characteristics to solve the transport equation on the basis of the velocity...
Temporal and vertical variation of hydraulic head in aquifers in the Edgewood area, Aberdeen Proving Ground, Maryland
Colleen A. Donnelly, Fredrick J. Tenbus
1998, Water-Resources Investigations Report 98-4047
Water-level data and interpretations from previous hydrogeological studies conducted by the U.S. Geological Survey in the Edgewood Area of Aberdeen Proving Ground (APG), Maryland, were compared to determine similarities and differences among the aquifers. Because the sediments that comprise the shallow aquifers are discontinuous, the shallow ground-water-flow systems are local...
Water quality, hydrology, and invertebrate communities of three remnant wetlands in Missouri, 1995-97
David C. Heimann, Suzanne R. Femmer
1998, Water-Resources Investigations Report 98-4190
This report presents the results of a study conducted by the U.S. Geological Survey in cooperation with the Missouri Department of Natural Resources from December 1995 through May 1997 to describe the water quality, hydrologic, and invertebrate characteristics of three remnant wetlands. These data may be used to help develop...
Relation of algal biomass to characteristics of selected streams in the Lower Susquehanna River basin
Robin A. Brightbill, Michael D. Bilger
1998, Water-Resources Investigations Report 98-4144
Seven small tributary streams with drainage areas ranging from 12.6 to 71.9 square miles, representative of both limestone and freestone settings, in the Lower Susquehanna River Basin were sampled for algae, nutrients, water quality, habitat, land use, hydrology, fish, and invertebrates. Nutrients, site characteristics, and selected characteristics of the invertebrate...
Effects of ice formation on hydrology and water quality in the lower Bradley River, Alaska — Implications for salmon incubation habitat
Ronald L. Rickman
1998, Water-Resources Investigations Report 98-4191
A minimum flow of 40 cubic feet per second is required in the lower Bradley River, near Homer, Alaska, from November 2 to April 30 to ensure adequate habitat for salmon incubation. The study that determined this minimum flow did not account for the effects of ice formation on habitat....
Application of nonlinear-regression methods to a ground-water flow model of the Albuquerque Basin, New Mexico
C. R. Tiedeman, J. M. Kernodle, D. P. McAda
1998, Water-Resources Investigations Report 98-4172
This report documents the application of nonlinear-regression methods to a numerical model of ground-water flow in the Albuquerque Basin, New Mexico. In the Albuquerque Basin, ground water is the primary source for most water uses. Ground-water withdrawal has steadily increased since the 1940's, resulting in large declines in water levels...
Hydrologic and meteorological data for an unsaturated-zone study area near the Radioactive Waste Management Complex, Idaho National Engineering and Environmental Laboratory, Idaho, 1990-96
K. S. Perkins, J. R. Nimmo, J. R. Pittman
1998, Open-File Report 98-9
Water-quality and algal conditions in the North Umpqua River Basin, Oregon, 1992-95, and implications for resource management
Chauncey W. Anderson, Kurt D. Carpenter
1998, Water-Resources Investigations Report 98-4125
This report describes the results of a synoptic water-quality and algal investigation during July 1995 at 36 stream sites in a 1,350 square-mile area of the North Umpqua River Basin, Oregon. The study area includes a headwaters hydroelectric project area, a Wild and Scenic reach in the main stem immediately...
Hydrologic characteristics and water budget for Swift Creek Reservoir, Virginia, 1997
S. C. Skrobialowski
1998, Water-Resources Investigations Report 98-4122
Estimating ground-water exchange with lakes using water-budget and chemical mass-balance approaches for ten lakes in ridge areas of Polk and Highlands counties, Florida
L. A. Sacks, Amy Swancar, T. M. Lee
1998, Water-Resources Investigations Report 98-4133
Water budget and chemical mass-balance approaches were used to estimate ground-water exchange with 10 lakes in ridge areas of Polk and Highlands Counties, Florida. At each lake, heads were monitored in the surficial aquifer system and deeper Upper Floridan aquifer, lake stage and rainfall were measured continuously, and lakes and...
Results of borehole geophysical logging and hydraulic tests conducted in Area D supply wells, former U.S. Naval Air Warfare Center, Warminster, Pennsylvania
Ronald A. Sloto, Kevin E. Grazul
1998, Water-Resources Investigations Report 98-4129
Borehole geophysical logging, aquifer tests, and aquifer-isolation (packer) tests were conducted in four supply wells at the former U.S. Naval Air Warfare Center (NAWC) in Warminster, PA, to identify the depth and yield of water-bearing zones, occurrence of borehole flow, and effect of pumping on nearby wells. The study was...
Evaluation of hydrologic data collected at the North Penn Area 12 Superfund Site, Montgomery County, Pennsylvania
Lisa A. Senior, Kevin E. Grazul, Charles R. Wood
1998, Water-Resources Investigations Report 98-4076
The North Penn Area 12 Superfund Site is underlain by the Lockatong Formation, which consists of interbedded gray to black siltstone and shale. The beds of the Lockatong Formation strike northeast and dip about 10d to 20d to the northwest in the vicinity of the site. Ground water moves through...
Areas contributing ground water to the Peconic Estuary, and ground-water budgets for the north and south forks and Shelter Island, eastern Suffolk County, New York
C.E. Schubert
1998, Water-Resources Investigations Report 97-4136
The Peconic Estuary, at the eastern end of Long Island, has been plagued by a recurrent algal bloom, locally referred to as ?Brown Tide,? that has caused the severe decline of local marine resources. Although the factors that trigger Brown Tide blooms remain uncertain, groundwater discharge has previously been shown...
Estimate of aquifer properties by numerically simulating ground-water/surface-water interactions, Fort Wainwright, Alaska
Allen S. Nakanishi, Michael R. Lilly
1998, Water-Resources Investigations Report 98-4088
MODFLOW, a finite-difference model of ground-water flow, was used to simulate the flow of water between the aquifer and the Chena River at Fort Wainwright, Alaska. The model was calibrated by comparing simulated ground-water hydrographs to those recorded in wells during periods of fluctuating river levels. The best fit between...
Effects of hydrologic, biological, and environmental processes on sources and concentrations of fecal bacteria in the Cuyahoga River, with implications for management of recreational waters in Summit and Cuyahoga Counties, Ohio
Donna N. Myers, G. F. Koltun, Donna S. Francy
1998, Water-Resources Investigations Report 98-4089
Discharges of fecal bacteria (fecal coliform bacteria and Escherichia coli ) to the middle main stem of the Cuyahoga River from storm water, combined sewers, and incompletely disinfected wastewater have resulted in frequent exceedances of bacteriological water-quality standards in a 23-mile reach of the river that flows through the Cuyahoga...
Hydrology, water quality, and nutrient loads to the Bauman Park Lake, Cherry Valley, Winnebago County, Illinois, May 1996–April 1997
Robert T. Kay, Aaron Trugestaad
1998, Water-Resources Investigations Report 98-4087
The Bauman Park Lake occupies a former sand and gravel quarry in the Village of Cherry Valley, Illinois. The lake is eutrophic, and nuisance growths of algae and aquatic macrophytes are supported by nutrients (nitrogen and phosphorus) that are derived primarily from ground-water inflow, the main source of water for...
Fish communities and their relation to physical and chemical characteristics of streams from selected environmental settings in the Lower Susquehanna River basin, 1993-95
Michael D. Bilger, Robin A. Brightbill
1998, Water-Resources Investigations Report 98-4004
Studies of fish-community composition were conducted annually in selected reaches (from 100 to 303 meters in length) on seven streams from June 1993 to June 1995 within the Lower Susquehanna River Basin. In 1994, additional reaches were selected on three of the streams, resulting in a total of 28 samples....
One-Dimensional Transport with Inflow and Storage (OTIS): A Solute Transport Model for Streams and Rivers
Robert L. Runkel
1998, Water-Resources Investigations Report 98-4018
OTIS is a mathematical simulation model used to characterize the fate and transport of water-borne solutes in streams and rivers. The governing equation underlying the model is the advection-dispersion equation with additional terms to account for transient storage, lateral inflow, first-order decay, and sorption. This equation and the associated equations...
Potentiometric surface of the Ozark Aquifer in northern Arkansas, 1995
Aaron L. Pugh
1998, Water-Resources Investigations Report 98-4000
The Ozark aquifer in northern Arkansas is comprised of dolostones, limestones, sandstones, and shales of Late Cambrian to Middle Devonian age, and ranges in thickness from approximately 1,100 feet to more than 4,000 feet. Hydrologically, the aquifer is complex, characterized by discrete and diffuse flow components with large spatial variations...
Analytical methods, numerical modeling, and monitoring strategies for evaluating the effects of ground-water withdrawals on unconfined aquifers in the New Jersey Coastal Plain
Edward Modica
1998, Water-Resources Investigations Report 98-4003
Analytical and numerical solutions of ground-water withdrawals in the unconfined part of the Kirkwood-Cohansey aquifer system of the Coastal Plain of New Jersey were evaluated for their usefulness in predicting the area of influence of a pumped well and in determining hydraulic characteristics of an aquifer. Additionally, simulations of ground-water...
