Hydrology, Water Quality, and Surface- and Ground-Water Interactions in the Upper Hillsborough River Watershed, West-Central Florida
J.T. Trommer, L. A. Sacks, E. L. Kuniansky
2007, Scientific Investigations Report 2007-5121
A study of the Hillsborough River watershed was conducted between October 1999 through September 2003 to characterize the hydrology, water quality, and interaction between the surface and ground water in the highly karstic uppermost part of the watershed. Information such as locations of ground-water recharge and discharge, depth of the...
Halite brine in the Onondaga Trough near Syracuse, New York: Characterization and simulation of variable-density flow
Richard M. Yager, William M. Kappel, Niel Plummer
2007, Scientific Investigations Report 2007-5058
Halite brine (saturation ranging from 45 to 80 percent) lies within glacial-drift deposits that fill the Onondaga Trough, a 40-km long bedrock valley deepened by Pleistocene ice near Syracuse, N.Y. The most concentrated brine occupies the northern end of the trough, more than 15 kilometers (km) beyond the northern limit...
Areas Contributing Recharge to Wells in the Tafuna-Leone Plain, Tutuila, American Samoa
Scot K. Izuka, John M. Perreault, Todd K. Presley
2007, Scientific Investigations Report 2007-5167
To address the concerns about the potential for contamination of drinking-water wells in the Tafuna-Leone Plain, Tutuila, American Samoa, a numerical ground-water flow model was developed and used to delineate areas contributing recharge to the wells (ACRWs). Surveys and analyses were conducted to obtain or compile certain essential hydrogeologic information...
Development of a Land Use Database for the Little Blackwater Watershed, Dorchester County, Maryland
Lesley E. Milheim, John Jones, Roger A. Barlow
2007, Open-File Report 2007-1309
Many agricultural and forested areas in proximity to National Wildlife Refuges (NWR) are under increasing economic pressure to develop lands for commercial or residential development. The upper portion of the Little Blackwater River watershed - a 27 square mile area within largely low-lying Dorchester County, Maryland, on the eastern shore...
Development of an Impervious-Surface Database for the Little Blackwater River Watershed, Dorchester County, Maryland
Lesley E. Milheim, John Jones, Roger A. Barlow
2007, Open-File Report 2007-1308
Many agricultural and forested areas in proximity to National Wildlife Refuges (NWR) are under increasing economic pressure for commercial or residential development. The upper portion of the Little Blackwater River watershed - a 27 square mile area within largely low-lying Dorchester County, Maryland, on the eastern shore of the Chesapeake...
Water quality in the upper Anacostia River, Maryland: Continuous and discrete monitoring with simulations to estimate concentrations and yields, 2003-05
Cherie V. Miller, Angelica L. Gutierrez-Magness, Brenda L. Feit Majedi, Gregory D. Foster
2007, Scientific Investigations Report 2007-5142
From 2003 through 2005, continuous and discrete waterquality data were collected at two stations on the Anacostia River in Maryland: Northeast Branch at Riverdale, Maryland (U.S. Geological Survey Station 01649500) and Northwest Branch near Hyattsville, Maryland (Station 01651000). Both stations are above the heads of tide for the river, and...
Simulations of potential runout and deposition of the Ferguson rockslide, Merced River Canyon, California
Roger P. Denlinger
2007, Open-File Report 2007-1275
INTRODUCTION An active rockslide in Merced River Canyon was first noticed on April 29, 2006 when a few rocks rolled onto Highway 140 between mileposts 103 and 104, compromising traffic on this highway and signaling the onset of renewed activity of the Ferguson rockslide. State highway 140 is one of the...
Analyses of Water-Level Differentials and Variations in Recharge between the Surficial and Upper Floridan Aquifers in East-Central and Northeast Florida
Louis C. Murray Jr.
2007, Scientific Investigations Report 2007-5081
Continuous (daily) water-level data collected at 29 monitoring-well cluster sites were analyzed to document variations in recharge between the surficial (SAS) and Floridan (FAS) aquifer systems in east-central and northeast Florida. According to Darcy's law, changes in the water-level differentials (differentials) between these systems are proportional to changes in the...
Wind River watershed restoration: Annual Report April 2004 - March 2005
P.J. Connolly, I.G. Jezorek
2007, Report
During 2004, researchers from U.S. Geological Survey’s Columbia River Research Laboratory (USGS-CRRL) collected temperature, flow, and habitat data to characterize physical habitat condition and variation within and among tributaries and mainstem sections in the Wind River subbasin. Juvenile salmonid population surveys were conducted within select study areas throughout the subbasin....
Concentrations and Loads of Nutrients and Suspended Sediments in Englesby Brook and Little Otter Creek, Lake Champlain Basin, Vermont, 2000-2005
Laura Medalie
2007, Scientific Investigations Report 2007-5074
The effectiveness of best-management practices (BMPs) in improving water quality in Lake Champlain tributaries was evaluated from 2000 through 2005 on the basis of analysis of data collected on concentrations of total phosphorus and suspended sediment in Englesby Brook, an urban stream in Burlington, and Little Otter Creek, an agricultural...
Historical Changes in Precipitation and Streamflow in the U.S. Great Lakes Basin, 1915-2004
Glenn A. Hodgkins, Robert W. Dudley, Stephen S. Aichele
2007, Scientific Investigations Report 2007-5118
The total amount of water in the Great Lakes Basin is important in the long-term allocation of water to human use and to riparian and aquatic ecosystems. The water available during low-flow periods is particularly important because the short-term demands for the water can exceed the supply. Precipitation increased over the...
Occurrence of Uranium and 222Radon in Glacial and Bedrock Aquifers in the Northern United States, 1993-2003
Joseph D. Ayotte, Sarah M. Flanagan, William S. Morrow
2007, Scientific Investigations Report 2007-5037
Water-quality data collected from 1,426 wells during 1993-2003 as part of the U.S. Geological Survey National Water-Quality Assessment (NAWQA) program were evaluated to characterize the water quality in glacial and bedrock aquifers of the northern United States. One of the goals of the NAWQA program is to synthesize data from...
Geophysical framework investigations influencing ground-water resources in east-central Nevada and west-central Utah, with a section on geologic and geophysical basin by basin descriptions
Janet T. Watt, David A. Ponce, Alan R. Wallace
2007, Open-File Report 2007-1163
A geophysical investigation was undertaken as part of an effort to characterize the geologic framework influencing ground-water resources in east-central Nevada and west-central Utah. New gravity data were combined with existing aeromagnetic, drill-hole, and geologic data to help determine basin geometry, infer structural features, estimate depth to pre-Cenozoic basement rocks,...
Effects of the temporal variability of evapotranspiration on hydrologic simulation in central Florida
Andrew M. O’Reilly
2007, Scientific Investigations Report 2007-5100
The transient response of a hydrologic system can be of concern to water-resource managers, because it is often extreme relatively short-lived events, such as floods or droughts, that profoundly influence the management of the resource. The water available to a hydrologic system for stream flow and aquifer recharge is determined...
Marl prairie vegetation response to 20th century hydrologic change
Christopher E. Bernhardt, Debra A. Willard
2007, Open-File Report 2006-1355
We conducted geochronologic and pollen analyses from sediment cores collected in solution holes within marl prairies of Big Cypress National Preserve to reconstruct vegetation patterns of the last few centuries and evaluate the stability and longevity of marl prairies within the greater Everglades ecosystem. Based on radiocarbon dating and pollen...
Watershed Effects on Streamflow Quantity and Quality in Six Watersheds of Gwinnett County, Georgia
Mark N. Landers, Paul D. Ankcorn, Keith W. McFadden
2007, Scientific Investigations Report 2007-5132
Watershed management is critical for the protection and enhancement of streams that provide multiple benefits for Gwinnett County, Georgia, and downstream communities. Successful watershed management requires an understanding of how stream quality is affected by watershed characteristics. The influence of watershed characteristics on stream quality is complex, particularly for the...
Tennessee StreamStats: A Web-Enabled Geographic Information System Application for Automating the Retrieval and Calculation of Streamflow Statistics
David E. Ladd, George S. Law
2007, Fact Sheet 2007-3081
The U.S. Geological Survey (USGS) provides streamflow and other stream-related information needed to protect people and property from floods, to plan and manage water resources, and to protect water quality in the streams. Streamflow statistics provided by the USGS, such as the 100-year flood and the 7-day 10-year low flow,...
Three-Dimensional Geologic Framework Model for a Karst Aquifer System, Hasty and Western Grove Quadrangles, Northern Arkansas
Kenzie J. Turner, Mark R. Hudson, Kyle E. Murray, David N. Mott
2007, Scientific Investigations Report 2007-5095
Understanding ground-water flow in a karst aquifer benefits from a detailed conception of the three-dimensional (3D) geologic framework. Traditional two-dimensional products, such as geologic maps, cross-sections, and structure contour maps, convey a mental picture of the area but a stronger conceptualization can be achieved by constructing a digital 3D representation...
Influence of Locally Derived Recharge on the Water Quality and Temperature of Springs in Hot Springs National Park, Arkansas
Richard W. Bell, Phillip D. Hays
2007, Scientific Investigations Report 2007-5004
The hot springs of Hot Springs National Park consist of a mixture of water from two recharge components: a primary hot-water component and a secondary cold-water component. Widespread distribution of fractures enables mixing of the hot- and cold-water components of flow near the discharge area for the springs. Urbanization in...
Description and User Manual for a Web-Based Interface to a Transit-Loss Accounting Program for Monument and Fountain Creeks, El Paso and Pueblo Counties, Colorado
Gerhard Kuhn, Gary S. Krammes, Vivian J. Beal
2007, Scientific Investigations Report 2007-5028
The U.S. Geological Survey, in cooperation with Colorado Springs Utilities, the Colorado Water Conservation Board, and the El Paso County Water Authority, began a study in 2004 with the following objectives: (1) Apply a stream-aquifer model to Monument Creek, (2) use the results of the modeling to develop a transit-loss...
Methods for estimating magnitude and frequency of peak flows for natural streams in Utah
Terry A. Kenney, Chris D. Wilkowske, Shane J. Wright
2007, Scientific Investigations Report 2007-5158
Estimates of the magnitude and frequency of peak streamflows is critical for the safe and cost-effective design of hydraulic structures and stream crossings, and accurate delineation of flood plains. Engineers, planners, resource managers, and scientists need accurate estimates of peak-flow return frequencies for locations on streams with and without streamflow-gaging...
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...
Geologic map of the Craters of the Moon 30' x 60' Quadrangle, Idaho
Mel A. Kuntz, Betty Skipp, Duane E. Champion, Philip B. Gans, D. Paco VanSistine, Scott R. Snyders
2007, Scientific Investigations Map 2969
The Craters of the Moon 30 x 60 minute quadrangle shows the geology of the northern two-thirds of the Craters of the Moon (COM) lava field and volcanic structures of the northern and central parts of the Great Rift volcanic rift zone. The COM lava field is the largest,...
Organic geochemistry of sediments in nearshore areas of the Mississippi and Atchafalaya Rivers: I. General organic characterization
William H. Orem, Robert J. Rosenbauer, Peter W. Swarzenski, Harry E. Lerch, M.D. Corum, Anne L. Bates
2007, Open-File Report 2007-1180
This report presents results on the general organic characteristics of sediment cores collected from the coastal zone of the Mississippi River system, including distributions of the important nutrient elements (C, N, P, and S). This was part of a larger study conducted from 2001-2005 to examine the delivery of sediment-associated...
