Annual dissolved nitrite plus nitrate and total phosphorous loads for the Susquehanna, St. Lawrence, Mississippi-Atchafalaya, and Columbia River basins, 1968-2004
Brent T. Aulenbach
2006, Open-File Report 2006-1087
Annual stream-water loads were calculated near the outlet of four of the larger river basins (Susquehanna, St. Lawrence, Mississippi-Atchafalaya, and Columbia) in the United States for dissolved nitrite plus nitrate (NO2 + NO3) and total phosphorus using LOADEST load estimation software. Loads were estimated for the period 1968-2004; although loads...
A guide for using the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California
Joan B. Blainey, Claudia C. Faunt, Mary C. Hill
2006, Open-File Report 2006-1104
This report is a guide for executing numerical simulations with the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California using the U.S. Geological Survey modular finite-difference ground-water flow model, MODFLOW-2000. Model inputs, including observations of hydraulic head, discharge, and boundary flows, are summarized....
Ground-water flow model of the Boone formation at the Tar Creek superfund site, Oklahoma and Kansas
T.B. Reed, John B. Czarnecki
2006, Scientific Investigations Report 2006-5097
Extensive mining activities conducted at the Tar Creek Superfund site, one of the largest Superfund sites in the United States, pose substantial health and safety risks. Mining activities removed a total of about 6,000,000 tons of lead and zinc by 1949. To evaluate the effect of this mining on the...
Geologic and hydrogeologic framework of the Espa?ola basin -- Proceedings of the 5th annual Espa?ola basin workshop, Santa Fe, New Mexico, March 7-8, 2006
Kevin C. McKinney
2006, Open-File Report 2006-1134
This report presents abstracts of technical studies that are focused on the hydrogeologic framework of the Espa?ola basin, a major subbasin of the Cenozoic Rio Grande rift. The Rio Grande, Rio Chama, Santa Fe River, and their tributaries carry important surface water in the Espa?ola basin. Sediments and interbedded volcanic...
Magnetotelluric data collected near geophysically logged boreholes in the Española and Middle Rio Grande Basins, New Mexico
Jackie M. Williams, Brian D. Rodriguez
2006, Open-File Report 2006-1120
The Santa Fe region is growing rapidly. The Santa Fe Group aquifer in the Española Basin is the main source of municipal water for the region, and water shortfalls could have serious consequences. Future growth and land management in the region depend on accurate assessment and protection of the region's...
Coastal classification atlas: South Texas coastal classification maps: Mansfield Channel to the Rio Grande
Robert A. Morton, Russell L. Peterson
2006, Open-File Report 2006-1133
The Nation's rapidly growing coastal population requires reliable information regarding the vulnerability of coastal regions to storm impacts. This has created a need for classifying coastal lands and evaluating storm-hazard vulnerability. Government officials and resource managers responsible for dealing with natural hazards also need accurate assessments of potential storm impacts...
GoPhast: A graphical user interface for PHAST
Richard B. Winston
2006, Techniques and Methods 6-A20
GoPhast is a graphical user interface (GUI) for the USGS model PHAST. PHAST simulates multicomponent, reactive solute transport in three-dimensional, saturated, ground-water flow systems. PHAST can model both equilibrium and kinetic geochemical reactions. PHAST is derived from HST3D (flow and transport) and PHREEQC (geochemical calculations). The flow and transport calculations...
Modeling surface-water flow and sediment mobility with the Multi-Dimensional Surface-Water Modeling System (MD_SWMS)
Richard McDonald, Jonathan Nelson, Paul Kinzel, Jeffrey S. Conaway
2006, Fact Sheet 2005-3078
The Multi-Dimensional Surface-Water Modeling System (MD_SWMS) is a Graphical User Interface for surface-water flow and sediment-transport models. The capabilities of MD_SWMS for developing models include: importing raw topography and other ancillary data; building the numerical grid and defining initial and boundary conditions; running simulations; visualizing results; and comparing results with...
Survival estimates of migrant juvenile salmonids through Bonneville Dam using radio telemetry, 2005
Timothy D. Counihan, Jill M. Hardiman, Chris Walker, Amy Puls, Glen Holmberg
2006, Report
During 2005, we evaluated the survival of radio-tagged yearling and subyearling Chinook salmon and steelhead trout through the Bonneville Dam spillway, powerhouses 1 and 2, the corner collector and juvenile bypass system (JBS) at powerhouse 2, and through all routes collectively using the route-specific survival model. Radio-tagged fish were released...
Documentation of a spreadsheet for time-series analysis and drawdown estimation
Keith J. Halford
2006, Scientific Investigations Report 2006-5024
Drawdowns during aquifer tests can be obscured by barometric pressure changes, earth tides, regional pumping, and recharge events in the water-level record. These stresses can create water-level fluctuations that should be removed from observed water levels prior to estimating drawdowns. Simple models have been developed for estimating unpumped water levels...
Geomorphic characteristics and classification of Duluth-area streams, Minnesota
Faith A. Fitzpatrick, Marie C. Peppler, Michele M. DePhilip, Kathy Lee
2006, Scientific Investigations Report 2006-5029
In 2003 and 2004, a geomorphic assessment of streams in 20 watersheds in the Duluth, Minn., area was conducted to identify and summarize geomorphic characteristics, processes, disturbance mechanisms, and potential responses to disturbance. Methods used to assess the streams included watershed characterization, descriptions of segment slopes and valley types, historical...
Two-dimensional resistivity investigation along West Fork Trinity River, Naval Air Station-Joint Reserve Base Carswell Field, Fort Worth, Texas, October 2004
Sachin D. Shah, Gregory P. Stanton
2006, Data Series 178
Naval Air Station-Joint Reserve Base Carswell Field (NAS-JRB) at Fort Worth, Tex., constitutes a government-owned, contractor-operated facility that has been in operation since 1942. Contaminants, primarily volatile organic compounds and metals, have entered the ground-water-flow system through leakage from waste-disposal sites and manufacturing processes. Ground water flows from west to...
Estimation of shallow ground-water recharge in the Great Lakes basin
B.P. Neff, A.R. Piggott, R. A. Sheets
2006, Scientific Investigations Report 2005-5284
This report presents the results of the first known integrated study of long-term average ground-water recharge to shallow aquifers (generally less than 100 feet deep) in the United States and Canada for the Great Lakes, upper St. Lawrence, and Ottawa River Basins. The approach used was consistent throughout the study...
Sinkhole flooding in Murfreesboro, Rutherford County, Tennessee, 2001-02
Mike Bradley, Gregg Edward Hileman
2006, Scientific Investigations Report 2005-5281
The U.S. Geological Survey, in cooperation with the City of Murfreesboro, Tennessee, conducted an investigation from January 2001 through April 2002 to delineate sinkholes and sinkhole watersheds in the Murfreesboro area and to characterize the hydrologic response of sinkholes to major rainfall events. Terrain analysis was used to define sinkholes...
Effects of spatially variable resolution on field-scale estimates of tracer concentration from electrical inversions using Archie's law
Kamini Singha, Steven M. Gorelick
2006, Geophysics (71) G83-G91
Two important mechanisms affect our ability to estimate solute concentrations quantitatively from the inversion of field-scale electrical resistivity tomography (ERT) data: (1) the spatially variable physical processes that govern the flow of current as well as the variation of physical properties in space and (2) the overparameterization of inverse models,...
Applications of geophysical methods to volcano monitoring
Jeff Wynn, Daniel Dzurisin, Carol A. Finn, James P. Kauahikaua, Richard G. Lahusen
2006, Conference Paper, 19th Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP 2006): Geophysical applications for environmental and engineering hazards - Advances and constraints
The array of geophysical technologies used in volcano hazards studies - some developed originally only for volcano monitoring - ranges from satellite remote sensing including InSAR to leveling and EDM surveys, campaign and telemetered GPS networks, electronic tiltmeters and strainmeters, airborne magnetic and electromagnetic surveys, short-period and broadband seismic...
Continuous hydrologic simulation and flood-frequency, hydraulic, and flood-hazard analysis of the Blackberry Creek watershed, Kane County, Illinois
David T. Soong, Timothy D. Straub, Elizabeth A. Murphy
2006, Scientific Investigations Report 2005-5270
Results of hydrologic model, flood-frequency, hydraulic model, and flood-hazard analysis of the Blackberry Creek watershed in Kane County, Illinois, indicate that the 100-year and 500-year flood plains range from approximately 25 acres in the tributary F watershed (a headwater subbasin at the northeastern corner of the watershed) to almost 1,800...
Suspended-sediment yields and stream-channel processes on Judy's Branch watershed in the St. Louis Metro East region in Illinois
Timothy D. Straub, Gary P. Johnson, Donald P. Roseboom, Carlos R. Sierra
2006, Scientific Investigations Report 2006-5016
Judy's Branch watershed, a small basin (8.64 square miles) in the St. Louis Metro East region in Illinois, was selected as a pilot site to determine suspended-sediment yields and stream-channel processes in the bluffs and American Bottoms (expansive low-lying valley floor in the region). Suspended-sediment and stream-chan-nel data collected and...
Water resources of Carbon County, Wyoming
Timothy T. Bartos, Laura L. Hallberg, Jon P. Mason, Jodi R. Norris, Kirk A. Miller
2006, Scientific Investigations Report 2006-5027
Carbon County is located in the south-central part of Wyoming and is the third largest county in the State. A study to describe the physical and chemical characteristics of surface-water and ground-water resources in Carbon County was conducted by the U.S. Geological Survey in cooperation with the Wyoming State Engineer's...
Chlorophyll a and inorganic suspended solids in backwaters of the upper Mississippi River system: Backwater lake effects and their associations with selected environmental predictors
James T. Rogala, Brian R. Gray
2006, Open-File Report 2006-1043
The Long Term Resource Monitoring Program (LTRMP) uses a stratified random sampling design to obtain water quality statistics within selected study reaches of the Upper Mississippi River System (UMRS). LTRMP sampling strata are based on aquatic area types generally found in large rivers (e.g., main channel, side channel, backwater, and...
EMMMA: A web-based system for environmental mercury mapping, modeling, and analysis
Hearn Jr., Stephen P. Wente, David I. Donato, John J. Aguinaldo
2006, Open-File Report 2006-1086
Mercury in our environment - in our air, water, soil, and especially our food - poses significant hazards to human health, particularly for developing fetuses and young children. Because of the importance of this issue and the length of time it has been studied, large and complex data sets of...
Earthquakes in Virginia and vicinity 1774 - 2004
Arthur C. Tarr, Russell L. Wheeler
2006, Open-File Report 2006-1017
This map summarizes two and a third centuries of earthquake activity. The seismic history consists of letters, journals, diaries, and newspaper and scholarly articles that supplement seismograph recordings (seismograms) dating from the early twentieth century to the present. All of the pre-instrumental (historical) earthquakes were large enough to be felt...
Interactive effects of dissolved zinc and orthophosphate on phytoplankton from Coeur d'Alene Lake, Idaho
James S. Kuwabara, Brent R. Topping, Paul F. Woods, James L. Carter, Stephen W. Hager
2006, Scientific Investigations Report 2006-5091
Within the longitudinal chemical-concentration gradient in Coeur d'Alene Lake, generated by inputs from the St. Joe and Coeur d'Alene Rivers, two dominant algal species, Chlorella minutissima and Asterionella formosa, were isolated and cultured in chemically defined media to examine growth response to a range of dissolved orthophosphate concentrations and zinc-ion...
Analysis of ambient conditions and simulation of hydrodynamics and water-quality characteristics in Beaver Lake, Arkansas, 2001 through 2003
Joel M. Galloway, W. Reed Green
2006, Scientific Investigations Report 2006-5003
Beaver Lake is a large, deep-storage reservoir located in the upper White River Basin in northwestern Arkansas. The purpose of this report is to describe the ambient hydrologic and water-quality conditions in Beaver Lake and its inflows and describe a two-dimensional model developed to simulate the hydrodynamics and water quality...
Use of the Multi-Node Well (MNW) package when simulating solute transport with the MODFLOW ground-water transport process
Leonard F. Konikow, G.Z. Hornberger
2006, Techniques and Methods 6-A15
This report describes modifications to a U.S. Geological Survey (USGS) three-dimensional solute-transport model (MODFLOW-GWT), which is incorporated into the USGS MODFLOW ground-water model as the Ground-Water Transport (GWT) Process. The modifications were made to create compatibility between the Multi-Node Well (MNW) Package for MODFLOW and the MODFLOW-GWT model. This compatibility...
