Preliminary results of sequential extraction experiments for selenium on mine waste and stream sediments from Vermont, Maine, and New Zealand
N.M. Piatak, R.R. Seal II, R. F. Sanzolone, P. J. Lamothe, Z. A. Brown
2006, Open-File Report 2006-1184
We report the preliminary results of sequential partial dissolutions used to characterize the geochemical distribution of selenium in stream sediments, mine wastes, and flotation-mill tailings. In general, extraction schemes are designed to extract metals associated with operationally defined solid phases. Total Se concentrations and the mineralogy of the samples are...
Sensitivity of potential evapotranspiration and simulated flow to varying meteorological inputs, Salt Creek watershed, DuPage County, Illinois
David E. Whitbeck
2006, Open-File Report 2005-1430
The Lamoreux Potential Evapotranspiration (LXPET) Program computes potential evapotranspiration (PET) using inputs from four different meteorological sources: temperature, dewpoint, wind speed, and solar radiation. PET and the same four meteorological inputs are used with precipitation data in the Hydrological Simulation Program-Fortran (HSPF) to simulate streamflow in the Salt Creek watershed,...
Shallow-landslide hazard map of Seattle, Washington
Edwin L. Harp, John A. Michael, William T. Laprade
2006, Open-File Report 2006-1139
Landslides, particularly debris flows, have long been a significant cause of damage and destruction to people and property in the Puget Sound region. Following the years of 1996 and 1997, the Federal Emergency Management Agency (FEMA) designated Seattle as a 'Project Impact' city with the goal of encouraging the city...
Geohydrology and water chemistry of the Alexander Valley, Sonoma County, California
Loren F. Metzger, Christopher D. Farrar, Kathryn M. Koczot, Eric G. Reichard
2006, Scientific Investigations Report 2006-5115
This study of the geohydrology and water chemistry of the Alexander Valley, California, was done to provide an improved scientific basis for addressing emerging water-management issues, including potential increases in water demand and changes in flows in the Russian River. The study tasks included (1) evaluation of existing geohydrological, geophysical,...
Potentiometric surface of the Upper Floridan aquifer, west-central Florida, May 2005
A.G. Ortiz, R.A. Blanchard
2006, Open-File Report 2006-1009
The Floridan aquifer system consists of the Upper and Lower Floridan aquifers separated by the middle confining unit. The middle confining unit and the Lower Floridan aquifer in west-central Florida generally contain highly mineralized water. The water-bearing units containing freshwater are herein referred to as the Upper Floridan aquifer. The...
Characterization of the hydrology, water chemistry, and aquatic communities of selected springs in the St. Johns River Water Management District, Florida, 2004
G. G. Phelps, Stephen J. Walsh, Robert M. Gerwig, William B. Tate
2006, Open-File Report 2006-1107
The hydrology, water chemistry, and aquatic communities of Silver Springs, De Leon Spring, Gemini Springs, and Green Spring in the St. Johns River Water Management District, Florida, were studied in 2004 to provide a better understanding of each spring and to compile data of potential use in future water-management decisions....
Hydrologic requirements of and consumptive ground-water use by riparian vegetation along the San Pedro River, Arizona
James M. Leenhouts, Juliet C. Stromberg, Russell L. Scott, Sharon J. Lite, Mark Dixon, Tyler Rychener, Elizabeth Makings, David G. Williams, David C. Goodrich, William L. Cable, Lainie R. Levick, Roberta McGuire, Rico M. Gazal, Enrico A. Yepez, Patrick Ellsworth, Travis E. Huxman
2006, Scientific Investigations Report 2005-5163
This study is a coordinated effort by the U.S. Geological Survey (USGS), the U.S. Department of Agriculture, Agricultural Research Service (USDA ARS), and Arizona State University, with assistance from the U.S. Army Corps of Engineers, the University of Wyoming, and the University of Arizona. The specific objectives of the study...
Digital data from the Questa-San Luis and Santa Fe East helicopter magnetic surveys in Santa Fe and Taos Counties, New Mexico, and Costilla County, Colorado
Viki Bankey, V. J. S. Grauch, B. J. Drenth, Geophex Ltd.
2006, Open-File Report 2006-1170
This report contains digital data, image files, and text files describing data formats and survey procedures for aeromagnetic data collected during high-resolution aeromagnetic surveys in southern Colorado and northern New Mexico in December, 2005. One survey covers the eastern edge of the San Luis basin, including the towns of Questa,...
Physical habitat classification and instream flow modeling to determine habitat availability during low-flow periods, North Fork Shenandoah River, Virginia
Jennifer L. Krstolic, Donald C. Hayes, Peter M. Ruhl
2006, Scientific Investigations Report 2006-5025
Increasing development and increasing water withdrawals for public, industrial, and agricultural water supply threaten to reduce streamflows in the Shenandoah River basin in Virginia. Water managers need more information to balance human water-supply needs with the daily streamflows necessary for maintaining the aquatic ecosystems. To meet the need for comprehensive...
Under the Golden Gate Bridge — Views of the sea floor near the entrance to San Francisco Bay, California
Peter Dartnell, Patrick L. Barnard, John L. Chin, Daniel Hanes, Rikk G. Kvitek, Pat J. Iampietro, James V. Gardner
2006, Scientific Investigations Map 2917
San Francisco Bay in Northern California is one of the largest and most altered estuaries within the United States. The sea floor within the bay as well as at its entrance is constantly changing due to strong tidal currents, aggregate mining, dredge disposal, and the creation of new land using...
Visualizing the geology of lake trout spawning sites: Northern Lake Michigan
Peter Dartnell, Peter Barnes, James V. Gardner, Kristen Lee
2006, Scientific Investigations Map 2930
Geologists and biologists are working together to understand the links between lake floor geology (composition and shape) and the distribution of lake trout throughout their life cycle. Lake floor geology is one of the main factors determining where lake trout spawn, feed, and hide. In support of ongoing research to...
Land-cover trends in the Mojave basin and range ecoregion
Benjamin M. Sleeter, Christian G. Raumann
2006, Scientific Investigations Report 2006-5098
The U.S. Geological Survey's Land-Cover Trends Project aims to estimate the rates of contemporary land-cover change within the conterminous United States between 1972 and 2000. A random sampling approach was used to select a representative sample of 10-km by 10-km sample blocks and to estimate change within +/- 1 percent...
Computation and error analysis of discharge for the Lake Michigan Diversion Project in Illinois: 1997-99 water years
James J. Duncker, Thomas M. Over, Juan A. Gonzalez
2006, Scientific Investigations Report 2006-5018
Acoustic velocity meters (AVM's) and acoustic Doppler current profilers (ADCP's) were used to measure streamflow at four streamflow-gaging stations in the Chicago River system. The streamflow data were used to compute discharge and to determine the uncertainty in the computed annual mean discharge at each station for the Lake Michigan...
Summary of surface-water quality, ground-water quality, and water withdrawals for the Spirit Lake Reservation, North Dakota
Kevin C. Vining, Steven W. Cates
2006, Open-File Report 2006-1144
Available surface-water quality, ground-water quality, and water-withdrawal data for the Spirit Lake Reservation were summarized. The data were collected intermittently from 1948 through 2004 and were compiled from U.S. Geological Survey databases, North Dakota State Water Commission databases, and Spirit Lake Nation tribal agencies. Although the quality of surface water...
Water-quality characteristics, including sodium-adsorption ratios, for four sites in the Powder River drainage basin, Wyoming and Montana, water years 2001-2004
Melanie L. Clark, Jon P. Mason
2006, Scientific Investigations Report 2006-5113
The U.S. Geological Survey, in cooperation with the Wyoming Department of Environmental Quality, monitors streams throughout the Powder River structural basin in Wyoming and parts of Montana for potential effects of coalbed natural gas development. Specific conductance and sodium-adsorption ratios may be larger in coalbed waters than in stream waters...
Forecasting selenium discharges to the San Francisco Bay-Delta Estuary: Ecological effects of a proposed San Luis Drain extension
Theresa S. Presser, Samuel N. Luoma
2006, Professional Paper 1646
Selenium discharges to the San Francisco Bay-Delta Estuary (Bay-Delta) could change significantly if federal and state agencies (1) approve an extension of the San Luis Drain to convey agricultural drainage from the western San Joaquin Valley to the North Bay (Suisun Bay, Carquinez Strait, and San Pablo Bay); (2) allow...
Sea floor topography and backscatter intensity of the Hudson Canyon region offshore of New York and New Jersey
Bradford Butman, David C. Twichell, Peter A. Rona, Brian E. Tucholke, Tammie J. Middleton, James M. Robb
2006, Open-File Report 2004-1441
These maps show the sea floor topography and backscatter intensity of the Hudson Canyon region on the continental slope and rise offshore of New Jersey and New York (fig. 1 and fig. 2). Sheet 1 shows sea floor topography as shaded relief. Sheet 2 shows sea floor topography as shaded...
Trends of Abutment-Scour Prediction Equations Applied to 144 Field Sites in South Carolina
Stephen T. Benedict, Nikhil Deshpande, Nadim M. Aziz, Paul Conrads
2006, Open-File Report 2003-295
The U.S. Geological Survey conducted a study in cooperation with the Federal Highway Administration in which predicted abutment-scour depths computed with selected predictive equations were compared with field measurements of abutment-scour depth made at 144 bridges in South Carolina. The assessment used five equations published in the Fourth Edition of...
Spectral reflectance properties (0.4-2.5 um) of secondary Fe-oxide, Fe-hydroxide, and Fe-sulfate-hydrate minerals associated with sulfide-bearing mine waste
J.K. Crowley, D.E. Williams, J.M. Hammarstrom1, N. Piatak, J.C. Mars, I-Ming Chou
2006, Open-File Report 2003-196
Fifteen Fe-oxide, Fe-hydroxide, and Fe-sulphate-hydrate mineral species commonly associated with sulphide bearing mine wastes were characterized by using X-ray powder diffraction and scanning electron microscope methods. Diffuse reflectance spectra of the samples show diagnostic absorption features related to electronic processes involving ferric and/or ferrous iron, and to vibrational processes...
Chapter 3. Determination of semivolatile organic compounds and polycyclic aromatic hydrocarbons in solids by gas chromatography/mass spectrometry
Steven D. Zaugg, Mark R. Burkhardt, Teresa L. Burbank, Mary C. Olson, Jana L. Iverson, Michael P. Schroeder
2006, Techniques and Methods 5-B3
A method for the determination of 38 polycyclic aromatic hydrocarbons (PAHs) and semivolatile organic compounds in solid samples is described. Samples are extracted using a pressurized solvent extraction system. The compounds of interest are extracted from the solid sample twice at 13,800 kilopascals; first at 120 degrees Celsius using a...
Seasonal changes in concentrations of dissolved pesticides and organic carbon in the Sacramento-San Joaquin delta, California, 1994-1996
James L. Orlando, Kathryn Kuivila
2006, Data Series 197
The Sacramento-San Joaquin Delta (Delta) of California is an ecologically rich and hydrologically complex region that receives runoff from nearly one-quarter of the state. Water-quality studies of surface water in the region have found dissolved pesticides in winter storm runoff at concentrations toxic to some aquatic invertebrates. However, scientists have...
Availability of Ground-Water Data for California, Water Year 2005
Julia A. Huff
2006, Fact Sheet 2006-3089
The U.S. Geological Survey, Water Resources, in cooperation with Federal, State, and local agencies, obtains a large amount of data pertaining to the ground-water resources of California each water year (October 1-September 30). These data constitute a valuable database for developing an improved understanding of the water resources of the...
An annotated list of the mayflies, stoneflies, and caddisflies of the Sand Creek basin, Great Sand Dunes National Park and Preserve, Colorado, 2004 and 2005
Robert E. Zuellig, Boris C. Kondratieff, David E. Ruiter, Richard A. Thorp
2006, Data Series 183
The U.S. Geological Survey, in conjunction with the Great Sand Dunes National Park and Preserve and its cooperators, did an extensive inventory of certain targeted aquatic-insect groups in the Sand Creek Basin, Great Sand Dunes National Park and Preserve, to establish a species list for future monitoring efforts. Study sites...
Water use and availability in the West Narragansett Bay area, coastal Rhode Island, 1995-99
Mark T. Nimiroski, Emily C. Wild
2006, Scientific Investigations Report 2005-5256
During the 1999 drought in Rhode Island, belowaverage precipitation caused a drop in ground-water levels and streamflow was below long-term averages. The low water levels prompted the U. S. Geological Survey and the Rhode Island Water Resources Board to conduct a series of cooperative water-use studies. The purpose of these...
Inventory of Amphibians and Reptiles in Southern Colorado Plateau National Parks
Trevor B. Persons, Erika M. Nowak
2006, Open-File Report 2006-1132
In fiscal year 2000, the National Park Service (NPS) initiated a nationwide program to inventory vertebrates andvascular plants within the National Parks, and an inventory plan was developed for the 19 park units in the Southern Colorado Plateau Inventory & Monitoring Network. We surveyed 12 parks in this network for...
