Statistical analyses of flood frequency, low-flow frequency, and flow duration of streams in the Philadelphia Area, Pennsylvania
Andrew Voytik
1986, Water-Resources Investigations Report 85-4008
Flood frequency, low-flow frequency, and flow-duration characteristics were computed for 26 stream-gaging stations in and near Philadelphia. Data were obtained from 21 continuous-recording stations and five stations that were initially continuous-recording stations, but which were subsequently converted to crest-stage stations. The annual peak flows were fitted to the three-parameter log-Pearson...
Geohydrology of the southwest alluvial basins regional aquifer- systems analysis, parts of Colorado, New Mexico, and Texas
D. W. Wilkins
1986, Water-Resources Investigations Report 84-4224
The Southwest Alluvial Basins study is part of the National Regional Aquifer-Systems Analysis program. Twenty-two structural basins extend from the San Luis Basin in southern Colorado to the Presidio Basin in western Texas. Closed surface-water basins west of the Guadalupe Mountains and east of the Peloncillo Mountains are included in...
Identification and description of potential ground-water quality monitoring wells in Florida
P. R. Seaber, M.E. Thagard
1986, Water-Resources Investigations Report 85-4130
The results of a survey of existing wells in Florida that meet the following criteria are presented: (1) well location is known , (2) principal aquifer is known, (3) depth of well is known, (4) well casing depth is known, (5) well water had been analyzed between 1970 and 1982,...
Retention time and flow patterns in Lake Moultrie, South Carolina
G. G. Patterson, R.M. Harvey
1986, Water-Resources Investigations Report 85-4121
A liquid dye tracer was injected into the inflow to Lake Moultrie, South Carolina, during high-flow conditions and again during low-flow conditions. Tracer concentrations were monitored at a network of fixed sampling stations in the lake to determine dispersion and transport characteristics in and through the lake. Wind-generated currents were...
Temperature of ground water at Philadelphia, Pennsylvania, 1979- 1981
Gary N. Paulachok
1986, Water-Resources Investigations Report 84-4189
Anthropogenic heat production has undoubtedly caused increased ground-water temperatures in many parts of Philadelphia, Pennsylvania, as shown by temperatures of 98 samples and logs of 40 wells measured during 1979-81. Most sample temperatures were higher than 12.6 degrees Celsius (the local mean annual air temperature), and many logs depict cooling...
Organic compounds in ground water near a sanitary landfill in the Town of Brookhaven, Long Island, New York
K.A. Pearsall, E. J. Wexler
1986, Water-Resources Investigations Report 85-4218
Landfill leachate and groundwater near the Brookhaven landfill site were analyzed for volatile, acid-extractable, and base/neutral-extractable organic compounds classified by EPA as ' priority pollutants, ' and for dissolved organic carbon (DOC) and inorganic constituents. Thirteen priority pollutants were detected, including benzene, chlorobenzene, ethyl benzene, and naphthalene. The most commonly...
Plan of study for the regional aquifer-system analysis of the San Juan structural basin, New Mexico, Colorado, Arizona, and Utah
G. E. Welder
1986, Water-Resources Investigations Report 85-4294
The San Juan structural basin is an 18,000 sq mi area that contains several extensive aquifers. The basin includes three surface drainage basins and parts of New Mexico, Colorado, Arizona, and Utah. Surface water in the area is fully appropriated, and the steadily increasing demand for groundwater has resulted in...
Ground-water flow in Melton Valley, Oak Ridge reservation, Roane County, Tennessee; preliminary model analysis
Patrick Tucci
1986, Water-Resources Investigations Report 85-4221
Shallow land burial of low-level radioactive waste has been practiced since 1951 in Melton Valley. Groundwater flow modeling was used to better understand the geohydrology of the valley, and to provide a foundation for future contaminant transport modeling. The three-dimensional, finite difference model simulates the aquifer as a two layer...
Potential for updip movement of salinewater in the Edwards Aquifer, San Antonio, Texas
Roberto Perez
1986, Water-Resources Investigations Report 86-4032
The salinity front, locally known as the "bad-water" line, in the Edwards aquifer separates the freshwater from the salinewater and occurs where the aquifer is confined. The concentration of dissolved solids of the salinewater at the salinity front is 1,000 milligrams per liter. The concentration of dissolved solids in water...
Constituent-load changes in urban stormwater runoff routed through a detention pond-wetlands system in central Florida
E.H. Martin, J. L. Smoot
1986, Water-Resources Investigations Report 85-4310
Direction of ground-water flow and ground-water quality near a landfill in Falmouth, Massachusetts
J.H. Persky
1986, Water-Resources Investigations Report 85-4188
A landfill in Falmouth, Massachusetts, is upgradient of a pond used for municipal water supply, but analysis of groundwater flow directions and groundwater quality indicates that leachate from the landfill does not threaten the municipal water supply. A network of water table observation wells was established, and water table altitudes...
Quality-assurance results for field pH and specific-conductance measurements, and for laboratory analysis, National Atmospheric Deposition Program and National Trends Network; January 1980-September 1984
L.J. Schroder, M. H. Brooks, B.A. Malo, T. C. Willoughby
1986, Water-Resources Investigations Report 86-4139
Five intersite comparison studies for the field determination of pH and specific conductance, using simulated-precipitation samples, were conducted by the U.S.G.S. for the National Atmospheric Deposition Program and National Trends Network. These comparisons were performed to estimate the precision of pH and specific conductance determinations made by sampling-site operators. Simulated-precipitation...
The relation of ground-water quality to housing density, Cape Cod, Massachusetts
J.H. Persky
1986, Water-Resources Investigations Report 86-4093
Correlation of median nitrate concentration in groundwater with housing density for 18 sample areas on Cape Cod yields a Pearson correlation coefficient of 0.802, which is significant at the 95 % confidence level. In five of nine sample areas where housing density is greater than one unit/acre, nitrate concentrations exceed...
Users manual for a one-dimensional Lagrangian transport model
D. H. Schoellhamer, H.E. Jobson
1986, Water-Resources Investigations Report 86-4145
A Users Manual for the Lagrangian Transport Model (LTM) is presented. The LTM uses Lagrangian calculations that are based on a reference frame moving with the river flow. The Lagrangian reference frame eliminates the need to numerically solve the convective term of the convection-diffusion equation and provides significant numerical advantages...
Results of exploratory drilling for water in Waihanau Valley, Molokai, Hawaii
K. J. Takasaki
1986, Water-Resources Investigations Report 85-4332
Three exploratory wells, located in lower Waihanau Valley on Molokai, were drilled and tested for their yields during the period May to October 1983. The first well, 582 ft deep, tapped the main water body in a basaltic aquifer intruded by scattered near-parallel volcanic dikes. Water in this water body...
Technique for predicting ground-water discharge to surface coal mines and resulting changes in head
L.S. Weiss, D. L. Galloway, Audrey L. Ishii
1986, Water-Resources Investigations Report 86-4156
Changes in seepage flux and head (groundwater level) from groundwater drainage into a surface coal mine can be predicted by a technique that considers drainage from the unsaturated zone. The user applies site-specific data to precalculated head and seepage-flux profiles. Groundwater flow through hypothetical aquifer cross sections was simulated using...
Programmers manual for a one-dimensional Lagrangian transport model
D. H. Schoellhamer, H.E. Jobson
1986, Water-Resources Investigations Report 86-4144
A one-dimensional Lagrangian transport model for simulating water-quality constituents such as temperature, dissolved oxygen , and suspended sediment in rivers is presented in this Programmers Manual. Lagrangian transport modeling techniques, the model 's subroutines, and the user-written decay-coefficient subroutine are discussed in detail. Appendices list the program codes. The Programmers...
Simulation of ground-water flow and infiltration from the Susquehanna River to a shallow aquifer at Kirkwood and Conklin, Broome County, New York
R. M. Yager
1986, Water-Resources Investigations Report 86-4123
A four-layer finite difference model was developed to simulate groundwater flow and induced infiltration to an aquifer underlying the Susquehanna River in the Towns of Kirkwood and Conklin in Broome County, NY. The aquifer consists of sand and gravel deposited in an ancestral river valley during the recession of glacial...
Water quality and flow of streams in Santa Clara Valley, Santa Clara County, California, 1979-81
M. A. Sylvester
1986, Water-Resources Investigations Report 84-4196
Connecticut observation wells; guidelines for network modification
R.L. Melvin
1986, Water-Resources Investigations Report 85-4079
The U.S. Geological Survey and Connecticut Department of Environmental Protection are developing a baseline observation well network to assess the present status of groundwater storage and relate it to long-term conditions and to describe and characterize natural changes in groundwater storage in relation to climatic variations, topography, and hydrogeologic setting....
Design, operation, and monitoring capability of an experimental artificial-recharge facility at East Meadow, Long Island, New York
B.J. Schneider, E. T. Oaksford
1986, Water-Resources Investigations Report 84-4321
Artificial recharge with tertiary-treated sewage is being tested at East Meadow to evaluate the physical and chemical effects on the groundwater system. The recharge facility contains 11 recharge basins and 5 injection wells and is designed to accept 4 million gallons of reclaimed water per day. Of the 11 basins,...
Hydrologic and climatologic factors affecting water levels of Devils Lake, North Dakota
Gregg J. Wiche
1986, Water-Resources Investigations Report 86-4320
High water levels of Devils Lake, North Dakota, and other terminal lakes, have, in recent years, threatened highways, agricultural land, recreational cabins, and communities located near these lakes. This study was undertaken to describe the hydrology of the Devils Lake basin and to determine how to estimate future water level...
Suspended sediment in Minnesota streams
L. H. Tornes
1986, Water-Resources Investigations Report 85-4312
Suspended-sediment samples have been collected by the U.S. Geological Survey from 115 sites on Minnesota streams since October 1960. Data from 42 sites were sufficient for characterizing sediment concentrations and yields. Average concentrations ranged from 4.4 milligrams per liter on the Baptism River in northeastern Minnesota to 190 milligrams per...
Processing water-chemistry data, Gulf Coast aquifer systems, south-central United States; with summary of dissolved-solids concentrations and water types
R. A. Pettijohn
1986, Water-Resources Investigations Report 86-4186
Ground-water availability and water quality at Southbury and Woodbury, Connecticut
D. L. Mazzaferro
1986, Water-Resources Investigations Report 84-4221
Increases in population and commercial and industrial development during the past 20 years have increased the demand for water in the Towns of Southbury and Woodbury, Connecticut. The stratified-drift aquifer, underlying much of the Pomperaug River valley, is the most practical source for additional large supplies. The yield of the...
