Relation between precipitation and the 25th percentile of June and September flows in streams in the Great Lakes, Ohio, and Upper Mississippi River Basins
Thomas A. Winterstein, David L. Lorenz
2007, Scientific Investigations Report 2007-5129
Regression models were developed for the 25th percentile of June and September flows (first quartile of flow) for 47 streamflow-gaging stations (gaging stations) in the Upper Mississippi, Ohio, and Great Lakes drainage basins. The gaging stations that were selected for this analysis are on unregulated rivers, have at least 40...
Hydrogeology and Potentiometric Surface of the Dublin and Midville Aquifer Systems in Richmond County, Georgia, January 2007
Lester J. Williams
2007, Scientific Investigations Map 2982
INTRODUCTION The Dublin and Midville aquifer systems are part of the Cretaceous aquifer system that underlies most of Richmond County, Georgia (Gorday, 1985; Falls and others, 1997). The Cretaceous aquifer system is the second most productive aquifer in Georgia and is a major source of water in the region. About 220...
Hydrogeologic investigation, water chemistry analysis, and model delineation of contributing areas for City of Tallahassee public-supply wells, Tallahassee, Florida
J. Hal Davis, Brian G. Katz
2007, Scientific Investigations Report 2007-5070
Ground water from the Upper Floridan aquifer is the sole source of water supply for Tallahassee, Florida, and the surrounding area. The City of Tallahassee (the City) currently operates 28 water-supply wells; 26 wells are distributed throughout the City and 2 are located in Woodville, Florida. Most of these wells...
Simulated effects of projected 2010 withdrawals on ground-water flow and water levels in the New Jersey coastal plain – A task of the New Jersey Water Supply Plan, 2006 revision
Alison D. Gordon
2007, Scientific Investigations Report 2007-5134
A ground-water flow model previously developed as part of a Regional Aquifer System Analysis (RASA) of the New Jersey Coastal Plain was used to simulate ground-water flow in eight major confined aquifers to help evaluate ground-water resources in support of the New Jersey Department of Environmental Protection's revision of the...
Determination of the δ15N of nitrate in water; RSIL lab code 2899
Tyler B. Coplen, Haiping Qi, Kinga Revesz, Karen Casciotti, Janet E. Hannon
2007, Techniques and Methods 10-C16
The purpose of the Reston Stable Isotope Laboratory (RSIL) lab code 2899 is to determine the δ15N of nitrate (NO3-) in water. The δ15N of the dissolved NO3- is analyzed by conversion of the NO3- to nitrous oxide (N2O), which serves as the analyte for mass spectrometry. A culture of...
MMA, A Computer Code for Multi-Model Analysis
Eileen P. Poeter, Mary C. Hill
2007, Techniques and Methods 6-E3
This report documents the Multi-Model Analysis (MMA) computer code. MMA can be used to evaluate results from alternative models of a single system using the same set of observations for all models. As long as the observations, the observation weighting, and system being represented are the same, the models can...
OPR-PPR, a computer program for assessing data importance to model predictions using linear statistics
Matthew J. Tonkin, Claire R. Tiedeman, D. Matthew Ely, Mary C. Hill
2007, Techniques and Methods 6-E2
The OPR-PPR program calculates the Observation-Prediction (OPR) and Parameter-Prediction (PPR) statistics that can be used to evaluate the relative importance of various kinds of data to simulated predictions. The data considered fall into three categories: (1) existing observations, (2) potential observations, and (3) potential information about parameters. The first two...
MODFLOW-2005, The U.S. Geological Survey Modular Ground-Water Model - Documentation of the Multiple-Refined-Areas Capability of Local Grid Refinement (LGR) and the Boundary Flow and Head (BFH) Package
Steffen W. Mehl, Mary C. Hill
2007, Techniques and Methods 6-A21
This report documents the addition of the multiple-refined-areas capability to shared node Local Grid Refinement (LGR) and Boundary Flow and Head (BFH) Package of MODFLOW-2005, the U.S. Geological Survey modular, three-dimensional, finite-difference ground-water flow model. LGR now provides the capability to simulate ground-water flow by using one or more block-shaped,...
Determination of the δ15N and δ18O of nitrate in water; RSIL lab code 2900
Tyler B. Coplen, Haiping Qi, Kinga Revesz, Karen Casciotti, Janet E. Hannon
2007, Techniques and Methods 10-C17
The purpose of the Reston Stable Isotope Laboratory (RSIL) lab code 2900 is to determine the δ15N and δ18O of nitrate (NO3-) in water. The δ15N and δ18O of the dissolved NO3- are analyzed by converting the NO3- to nitrous oxide (N2O), which serves as the analyte for mass spectrometry....
Determination of the δ15N of nitrate in solids; RSIL lab code 2894
Tyler B. Coplen, Haiping Qi, Kinga Revesz, Karen Casciotti, Janet E. Hannon
2007, Techniques and Methods 10-C12
The purpose of the Reston Stable Isotope Laboratory (RSIL) lab code 2894 is to determine the δ15N of nitrate (NO3-) in solids. The nitrate fraction of the nitrogen species is dissolved by water (called leaching) and can be analyzed by the bacterial method covered in RSIL lab code 2899. After...
Determination of the δ15N and δ18O of nitrate in solids; RSIL lab code 2897
Tyler B. Coplen, Haiping Qi, Kinga Revesz, Karen Casciotti, Janet E. Hannon
2007, Techniques and Methods 10-C14
The purpose of the Reston Stable Isotope Laboratory (RSIL) lab code 2897 is to determine the δ15N and δ18O of nitrate (NO3-) in solids. The NO3- fraction of the nitrogen species is dissolved by water (called leaching) and can be analyzed by the bacterial method covered in RSIL lab code...
Two-Dimensional Flood-Inundation Model of the Flint River at Albany, Georgia
Jonathan W. Musser, Thomas R. Dyar
2007, Scientific Investigations Report 2007-5107
Potential flow characteristics of future flooding along a 4.8-mile reach of the Flint River in Albany, Georgia, were simulated using recent digital-elevation-model data and the U.S. Geological Survey finite-element surface-water modeling system for two-dimensional flow in the horizontal plane (FESWMS-2DH). Simulated inundated areas, in 1-foot (ft) increments, were created for...
Magnetotelluric Data, Mid Valley, Nevada Test Site, Nevada
Jackie M. Williams, Erin L. Wallin, Brian D. Rodriguez, Charles R. Lindsey, Jay A. Sampson
2007, Open-File Report 2007-1123
Introduction The United States Department of Energy (DOE) and the National Nuclear Security Administration (NNSA) at their Nevada Site Office (NSO) are addressing ground-water contamination resulting from historical underground nuclear testing through the Environmental Management (EM) program and, in particular, the Underground Test Area (UGTA) project. One issue of concern is the...
Geologic map of Nevada
A. Elizabeth Jones Crafford
2007, Data Series 249
The purpose of the Geologic Map of Nevada is to provide an integrated set of digital geologic information that can be used for regional geologic and rigorous spatial analysis. Two components of this map represent new information that has not been published in this form before. The new geology layer...
The association of arsenic with redox conditions, depth, and ground-water age in the glacial aquifer system of the northern United States
Mary Ann Thomas
2007, Scientific Investigations Report 2007-5036
More than 800 wells in the glacial aquifer system of the Northern United States were sampled for arsenic as part of U.S. Geological Survey National Water-Quality Assessment (NAWQA) studies during 1991-2003. Elevated arsenic concentrations (greater than or equal to 10 micrograms per liter) were detected in 9 percent of samples. Elevated...
Ground-water age and quality in the High Plains Aquifer near Seward, Nebraska, 2003-04
Jennifer S. Stanton, Matthew K. Landon, Michael J. Turco
2007, Scientific Investigations Report 2007-5088
The U.S. Geological Survey, in cooperation with the City of Seward, Nebraska, conducted a study of ground-water age and quality to improve understanding of: (1) traveltimes from recharge areas to public-supply wells, (2) the effects of geochemical reactions in the aquifer on water quality, and (3) how water quality has...
Strontium Isotopic Composition of Paleozoic Carbonate Rocks in the Nevada Test Site Vicinity, Clark, Lincoln, and Nye Counties, Nevada, and Inyo County, California
James B. Paces, Zell E. Peterman, Kiyoto Futo, Thomas A. Oliver, Brian D. Marshall
2007, Data Series 280
Ground water moving through permeable Paleozoic carbonate rocks represents the most likely pathway for migration of radioactive contaminants from nuclear weapons testing at the Nevada Test Site, Nye County, Nevada. The strontium isotopic composition (87Sr/86Sr) of ground water offers a useful means of testing hydrochemical models of regional flow involving...
Effects of ground-water withdrawal on Kaunakakai Stream environmental restoration plan, Molokai, Hawaii
Delwyn S. Oki
2007, Scientific Investigations Report 2007-5128
The U.S. Army Corps of Engineers, in cooperation with the County of Maui Department of Public Works and Environmental Management, has proposed to construct 2.75 acres of shallow ponds and mudflats near the mouth of Kaunakakai Stream, Moloka`i, Hawai`i to restore habitat for the endangered native Hawaiian Stilt. Kaunakakai Stream...
Simulation of Surface-Water Conditions in the Nontidal Passaic River Basin, New Jersey
Frederick J. Spitz
2007, Scientific Investigations Report 2007-5052
The Passaic River Basin, the third largest drainage basin in New Jersey, encompasses 950 mi2 (square miles) in the highly urbanized area outside New York City, with a population of 2 million. Water quality in the basin is affected by many natural and anthropogenic factors. Nutrient loading to the Wanaque...
Rapid Method for Escherichia coli in the Cuyahoga River
Amie M. G. Brady
2007, Open-File Report 2007-1210
This study is a continuation of a previous U.S. Geological Survey (USGS) project in cooperation with the National Park Service at Cuyahoga Valley National Park in Brecksville, Ohio. A rapid (1-hour) method for detecting Escherichia coli (E. coli) in water was tested and compared to the standard (24-hour) method for...
Sensitivity of mottled sculpins (Cottus bairdi) and rainbow trout (Onchorhynchus mykiss) to acute and chronic toxicity of cadmium, copper, and zinc
John M. Besser, Christopher A. Mebane, David R. Mount, Chris D. Ivey, James L. Kunz, I. Eugene Greer, Thomas W. May, Christopher G. Ingersoll
2007, Environmental Toxicology and Chemistry (26) 1657-1665
Studies of fish communities of streams draining mining areas suggest that sculpins (Cottus spp.) may be more sensitive than salmonids to adverse effects of metals. We compared the toxicity of zinc, copper, and cadmium to mottled sculpin (C. bairdi) and rainbow trout (Onchorhynchus mykiss) in laboratory toxicity tests. Acute (96-h) and...
Initial Everglades Depth Estimation Network (EDEN) digital elevation model research and development
John W. Jones, Susan D. Price
2007, Open-File Report 2007-1034
The Everglades Depth Estimation Network (EDEN) offers a consistent and documented dataset that can be used to guide large-scale field operations, to integrate hydrologic and ecological responses, and to support biological and ecological assessments that measure ecosystem responses to the Comprehensive Everglades Restoration Plan (Telis, 2006). To produce historic and...
Sand waves at the mouth of San Francisco Bay, California
Helen Gibbons, Patrick L. Barnard
2007, General Information Product 54
The U.S. Geological Survey; California State University, Monterey Bay; U.S. Army Corps of Engineers; National Oceanic and Atmospheric Administration; and Center for Integrative Coastal Observation, Research and Education partnered to map central San Francisco Bay and its entrance under the Golden Gate Bridge using multibeam echosounders. View eastward, through the Golden...
Seismic Hazard Maps for Seattle, Washington, Incorporating 3D Sedimentary Basin Effects, Nonlinear Site Response, and Rupture Directivity
Arthur D. Frankel, William J. Stephenson, David L. Carver, Robert A. Williams, Jack K. Odum, Susan Rhea
2007, Open-File Report 2007-1175
This report presents probabilistic seismic hazard maps for Seattle, Washington, based on over 500 3D simulations of ground motions from scenario earthquakes. These maps include 3D sedimentary basin effects and rupture directivity. Nonlinear site response for soft-soil sites of fill and alluvium was also applied in the maps. The report...
Simulation of Regional Ground-Water Flow in the Suwannee River Basin, Northern Florida and Southern Georgia
Michael Planert
2007, Scientific Investigations Report 2007-5031
The Suwannee River Basin covers a total of nearly 9,950 square miles in north-central Florida and southern Georgia. In Florida, the Suwannee River Basin accounts for 4,250 square miles of north-central Florida. Evaluating the impacts of increased development in the Suwannee River Basin requires a quantitative understanding of the boundary...
