Geologic map of the State of Hawai`i
David R. Sherrod, John M. Sinton, Sarah E. Watkins, Kelly M. Brunt
2007, Open-File Report 2007-1089
The State's geology is presented on eight full-color map sheets, one for each of the major islands. These map sheets, the illustrative meat of the publication, can be downloaded in pdf format, ready to print. Map scale is 1:100,000 for most of the islands, so that each map is about...
Concentration data for anthropogenic organic compounds in ground water, surface water, and finished water of selected community water systems in the United States, 2002-05
Janet M. Carter, Gregory C. Delzer, James A. Kingsbury, Jessica A. Hopple
2007, Data Series 268
The National Water-Quality Assessment Program of the U.S. Geological Survey began implementing Source Water-Quality Assessments (SWQAs) in 2001 that focus on characterizing the quality of source water and finished water of aquifers and major rivers used by some of the larger community water systems (CWSs) in the United States. As...
Simulation of Hydrologic-System Responses to Ground-Water Withdrawals in the Hunt-Annaquatucket-Pettaquamscutt Stream-Aquifer System, Rhode Island
Paul M. Barlow, Lance J. Ostiguy
2007, Open-File Report 2006-1226
A numerical-modeling study was done to better understand hydrologic-system responses to ground-water withdrawals in the Hunt-Annaquatucket-Pettaquamscutt (HAP) stream-aquifer system of Rhode Island. System responses were determined by use of steady-state and transient numerical ground-water-flow models. These models were initially developed in the late 1990s as part of a larger study...
LiDAR-Derived Flood-Inundation Maps for Real-Time Flood-Mapping Applications, Tar River Basin, North Carolina
Jerad D. Bales, Chad R. Wagner, Kirsten C. Tighe, Silvia Terziotti
2007, Scientific Investigations Report 2007-5032
Flood-inundation maps were created for selected streamgage sites in the North Carolina Tar River basin. Light detection and ranging (LiDAR) data with a vertical accuracy of about 20 centimeters, provided by the Floodplain Mapping Information System of the North Carolina Floodplain Mapping Program, were processed to produce topographic data for...
Stage-Discharge Relations for the Colorado River in Glen, Marble, and Grand Canyons, Arizona, 1990-2005
Joseph E. Hazel Jr., Matt Kaplinski, Rod Parnell, Keith Kohl, David J. Topping
2007, Open-File Report 2006-1243
This report presents stage-discharge relations for 47 discrete locations along the Colorado River, downstream from Glen Canyon Dam. Predicting the river stage that results from changes in flow regime is important for many studies investigating the effects of dam operations on resources in and along the Colorado River. The empirically...
Summary of percentages of zero daily mean streamflow for 712 U.S. Geological Survey streamflow-gaging stations in Texas through 2003
William H. Asquith, Joseph Vrabel, Meghan C. Roussel
2007, Data Series 247
Analysts and managers of surface-water resources might have interest in the zero-flow potential for U.S.Geological Survey (USGS) streamflow-gaging stations in Texas. The USGS, in cooperation with the Texas Commission on Environmental Quality, initiated a data and reporting process to generate summaries of percentages of zero daily mean streamflow for 712...
Simulation of the shallow ground-water-flow system near Grindstone Creek and the community of New Post, Sawyer County, Wisconsin
Paul F. Juckem, Randall J. Hunt
2007, Scientific Investigations Report 2007-5014
A two-dimensional, steady-state ground-water-flow model of Grindstone Creek, the New Post community, and the surrounding areas was developed using the analytic element computer code GFLOW. The parameter estimation code UCODE was used to obtain a best fit of the model to measured water levels and streamflows. The calibrated model was...
Factors Affecting Spatial and Temporal Variability in Nutrient and Pesticide Concentrations in the Surficial Aquifer on the Delmarva Peninsula
Linda M. Debrewer, Scott W. Ator, Judith M. Denver
2007, Scientific Investigations Report 2005-5257
Water quality in the unconfined, unconsolidated surficial aquifer on the Delmarva Peninsula is influenced by the availability of soluble ions from natural and human sources, and by geochemical factors that affect the mobility and fate of these ions within the aquifer. Ground-water samples were collected from 60 wells completed in...
Mercury at the Oat Hill Extension Mine and James Creek, Napa County, California: Tailings, sediment, water, and biota, 2003-2004
Aaron J. Slowey, James J. Rytuba, Roger L. Hothem, Jason T. May
2007, Open-File Report 2007-1132
The Oat Hill Extension (OHE) Mine is one of several mercury mines located in the James Creek/Pope Creek watershed that produced mercury from the 1870's until 1944 (U.S. Bureau of Mines, 1965). The OHE Mine developed veins and mineralized fault zones hosted in sandstone that extended eastward from the Oat...
Reconnaissance study of the hydrology of American Memorial Park, Island of Saipan, Commonwealth of the Northern Mariana Islands
Jeff A. Perreault
2007, Scientific Investigations Report 2007-5042
American Memorial Park, a unit of the National Park Service on the Island of Saipan, includes among its features a 27-acre estuarine system that has become a rarity within the Commonwealth of the Northern Mariana Islands. The estuarine system's mosaic of marshy areas interspersed with emergent wetlands and mixed wet...
Ground-Water Flow Model for the Spokane Valley-Rathdrum Prairie Aquifer, Spokane County, Washington, and Bonner and Kootenai Counties, Idaho
Paul A. Hsieh, Michael E. Barber, Bryce A. Contor, Akram Hossain, Gary S. Johnson, Joseph L. Jones, Allan H. Wylie
2007, Scientific Investigations Report 2007-5044
This report presents a computer model of ground-water flow in the Spokane Valley-Rathdrum Prairie (SVRP) aquifer in Spokane County, Washington, and Bonner and Kootenai Counties, Idaho. The aquifer is the sole source of drinking water for more than 500,000 residents in the area. In response to the concerns about the...
Database Dictionary for Ethiopian National Ground-Water DAtabase (ENGDA) Data Fields
Eve L. Kuniansky, David W. Litke, Patrick Tucci
2007, Open-File Report 2007-1099
Introduction This document describes the data fields that are used for both field forms and the Ethiopian National Ground-water Database (ENGDA) tables associated with information stored about production wells, springs, test holes, test wells, and water level or water-quality observation wells. Several different words are used in this database dictionary and...
Major Crustal Fault Zone Trends and Their Relation to Mineral Belts in the North-Central Great Basin, Nevada
Brian D. Rodriguez, Jay A. Sampson, Jackie M. Williams
2007, Open-File Report 2007-1115
The Great Basin physiographic province covers a large part of the western United States and contains one of the world's leading gold-producing areas, the Carlin Trend. In the Great Basin, many sedimentary-rock-hosted disseminated gold deposits occur along such linear mineral-occurrence trends. The distribution and genesis of these deposits is not...
Effect of Drought on Streamflow and Stream-Water Quality in Colorado, July through September 2002
Daniel T. Chafin, A. Douglas Druliner
2007, Scientific Investigations Report 2006-5322
During 2002, Colorado experienced the State's worst drought since 1977. In 2003, the U.S. Geological Survey entered into cooperative agreement with the Colorado Department of Public Health and Environment to evaluate the general effects of drought on the water quality of streams in Colorado during summer 2002 by analyzing a...
Mineralogy from Cores in Prospect Gulch, San Juan County, Colorado
Dana J. Bove, Raymond H. Johnson, Douglas B. Yager
2007, Open-File Report 2007-1095
In the late nineteenth century, San Juan County, Colorado, was the center of a metal mining boom in the San Juan Mountains. Although most mining activity ceased by the 1990s, the effects of historical mining continue to contribute metals to ground water and surface water. Previous research by the U.S....
Application of FTLOADDS to Simulate Flow, Salinity, and Surface-Water Stage in the Southern Everglades, Florida
John D. Wang, Eric D. Swain, Melinda A. Wolfert, Christian D. Langevin, Dawn E. James, Pamela A. Telis
2007, Scientific Investigations Report 2007-5010
The Comprehensive Everglades Restoration Plan requires numerical modeling to achieve a sufficient understanding of coastal freshwater flows, nutrient sources, and the evaluation of management alternatives to restore the ecosystem of southern Florida. Numerical models include a regional water-management model to represent restoration changes to the hydrology of southern Florida and...
How Much Water Is in the Apalachicola, Chattahoochee, and Flint Rivers, and How Much Is Used?
Mark N. Landers, Jaime A. Painter
2007, Fact Sheet 2007-3034
Questions of how much water is in the Apalachicola, Chattahoochee, and Flint (ACF) Rivers and how much is used do not have simple answers. The answers depend on the location in the river basin and on the year and season (as discussed on the first two pages of this fact...
Ground-Water Hydrology of the Upper Klamath Basin, Oregon and California
Marshall W. Gannett, Kenneth E. Lite Jr., Jonathan L. La Marche, Bruce J. Fisher, Danial J. Polette
2007, Scientific Investigations Report 2007-5050
The upper Klamath Basin spans the California-Oregon border from the flank of the Cascade Range eastward to the Basin and Range Province, and encompasses the Klamath River drainage basin above Iron Gate Dam. Most of the basin is semiarid, but the Cascade Range and uplands in the interior and eastern...
Exchanges of Water between the Upper Floridan Aquifer and the Lower Suwannee and Lower Santa Fe Rivers, Florida
J. W. Grubbs, C. A. Crandall
2007, Professional Paper 1656-C
Exchanges of water between the Upper Floridan aquifer and the Lower Suwannee River were evaluated using historic and current hydrologic data from the Lower Suwannee River Basin and adjacent areas that contribute ground-water flow to the lowest 76 miles of the Suwannee River and the lowest 28 miles of the...
Color shaded-relief and surface-classification maps of the Fish Creek Area, Harrison Bay Quadrangle, Northern Alaska
John L. Mars, Christopher P. Garrity, David W. Houseknecht, Lee Amoroso, Donald C. Meares
2007, Scientific Investigations Map 2948
The northeastern part of the National Petroleum Reserve in Alaska (NPRA) has become an area of active petroleum exploration during the past five years. Recent leasing and exploration drilling in the NPRA requires the U.S. Bureau of Land Management (BLM) to manage and monitor a variety of surface activities that...
Hydraulic Geometry Characteristics of Continuous-Record Streamflow-Gaging Stations on Four Urban Watersheds Along the Main Stem of Gwynns Falls, Baltimore County and Baltimore City, Maryland
Edward J. Doheny, Gary T. Fisher
2007, Scientific Investigations Report 2006-5190
Four continuous-record streamflow-gaging stations are currently being operated by the U.S. Geological Survey on the main stem of Gwynns Falls in western Baltimore County and Baltimore City, Maryland. The four streamflow-gaging stations drain urban or suburban watersheds with significantly different drainage areas. In addition to providing continuous- record discharge data...
Methods for Estimating Annual Wastewater Nutrient Loads in the Southeastern United States
Gerard McMahon, Larinda Tervelt, William Donehoo
2007, Open-File Report 2007-1040
This report describes an approach for estimating annual total nitrogen and total phosphorus loads from point-source dischargers in the southeastern United States. Nutrient load estimates for 2002 were used in the calibration and application of a regional nutrient model, referred to as the SPARROW (SPAtially Referenced Regression On Watershed attributes)...
Vertical gradients in water chemistry and age in the Northern High Plains Aquifer, Nebraska, 2003
P.B. McMahon, J.K. Böhlke, C. P. Carney
2007, Scientific Investigations Report 2006-5294
The northern High Plains aquifer is the primary source of water used for domestic, industrial, and irrigation purposes in parts of Colorado, Kansas, Nebraska, South Dakota, and Wyoming. Despite the aquifer’s importance to the regional economy, fundamental ground-water characteristics, such as vertical gradients in water chemistry and age, remain poorly...
Assessment of Areal Recharge to the Spokane Valley-Rathdrum Prairie Aquifer, Spokane County, Washington, and Bonner and Kootenai Counties, Idaho
James R. Bartolino
2007, Scientific Investigations Report 2007-5038
A numerical flow model of the Spokane Valley-Rathdrum Prairie aquifer currently (2007) being developed requires the input of values for areally-distributed recharge, a parameter that is often the most uncertain component of water budgets and ground-water flow models because it is virtually impossible to measure over large areas. Data from...
Geological assessment of cores from the Great Bay National Wildlife Refuge, New Hampshire
Nora K. Foley, Robert A. Ayuso, Joseph D. Ayotte, Denise L. Montgomery, Gilpin R. Robinson Jr.
2007, Scientific Investigations Report 2006-5203
Geological sources of metals (especially arsenic and zinc) in aquifer bedrock were evaluated for their potential to contribute elevated values of metals to ground and surface waters in and around Rockingham County, New Hampshire. Ayotte and others (1999, 2003) had proposed that arsenic concentrations in ground water flowing through bedrock...
