Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

4723 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 80, results 1976 - 2000

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Monitoring and research to describe geomorphic effects of the 2011 controlled flood on the Green River in the Canyon of Lodore, Dinosaur National Monument, Colorado and Utah
Erich R. Mueller, Paul E. Grams, John C. Schmidt, Joseph E. Hazel Jr., Matt Kaplinski, Jason A. Alexander, Keith Kohl
2014, Scientific Investigations Report 2014-5022
In 2011, a large magnitude flow release from Flaming Gorge Reservoir, Wyoming and Utah, occurred in response to high snowpack in the middle Rocky Mountains. This was the third highest recorded discharge along the Green River downstream of Flaming Gorge Dam, Utah, since its initial closure in November 1962 and...
Simulation of zones of contribution to wells at site GM–38, Naval Weapons Industrial Reserve Plant, Bethpage, New York
Paul Misut
2014, Scientific Investigations Report 2014-5036
A three-dimensional groundwater-flow model is coupled with the particle-tracking program MODPATH to delineate zones of contribution to wells pumping from the Magothy aquifer and supplying water to a chlorinated volatile organic compound removal plant at site GM–38, Naval Weapons Industrial Reserve Plant, Bethpage, New York. By use of driller’s logs,...
Hydrogeologic framework and salinity distribution of the Floridan aquifer system of Broward County, Florida
Ronald S. Reese, Kevin J. Cunningham
2014, Scientific Investigations Report 2014-5029
Concerns about water-level decline and seawater intrusion in the surficial Biscayne aquifer, currently the principal source of water supply to Broward County, prompted a study to refine the hydrogeologic framework of the underlying Floridan aquifer system to evaluate its potential as an alternative source of supply. This report presents cross...
Acute and chronic sensitivity of white sturgeon (Acipenser transmontanus) and rainbow trout (Oncorhynchus mykiss) to cadmium, copper, lead, or zinc in laboratory water-only exposures
Christopher G. Ingersoll, Ning Contributions by Wang, Robin D. Calfee, Erinn Beahan, William G. Brumbaugh, Rebecca A. Dorman, Doug K. Hardesty, James L. Kunz, Edward E. Little, Christopher A. Mebane, Holly J. Puglis
2014, Scientific Investigations Report 2013-5204
White sturgeon (Acipenser transmontanus) are experiencing poor recruitment in the trans boundary reach of the upper Columbia River in eastern Washington State. Limited toxicity data indicated that early life stages of white sturgeon are sensitive to metals. In acute 4-day (d) exposures with larval white sturgeon, previous studies have reported...
Characterization of the Marcellus Shale based on computer-assisted correlation of wireline logs in Virginia and West Virginia
Catherine B. Enomoto, Ricardo A. Olea, James L. Coleman Jr.
2014, Scientific Investigations Report 2013-5131
The Middle Devonian Marcellus Shale in the Appalachian basin extends from central Ohio on the west to eastern New York on the east, and from north-central New York on the north to northern Tennessee on the south. Its thickness ranges from 0 feet (ft) where it pinches out to the...
Time-integrated passive sampling as a complement to conventional point-in-time sampling for investigating drinking-water quality, McKenzie River Basin, Oregon, 2007 and 2010-11
Kathleen A. McCarthy, David A. Alvarez
2014, Scientific Investigations Report 2013-5215
The Eugene Water & Electric Board (EWEB) supplies drinking water to approximately 200,000 people in Eugene, Oregon. The sole source of this water is the McKenzie River, which has consistently excellent water quality relative to established drinking-water standards. To ensure that this quality is maintained as land use in the...
Methods for estimating the magnitude and frequency of floods for urban and small, rural streams in Georgia, South Carolina, and North Carolina, 2011
Toby D. Feaster, Anthony J. Gotvald, J. Curtis Weaver
2014, Scientific Investigations Report 2014-5030
Reliable estimates of the magnitude and frequency of floods are essential for the design of transportation and water-conveyance structures, flood-insurance studies, and flood-plain management. Such estimates are particularly important in densely populated urban areas. In order to increase the number of streamflow-gaging stations (streamgages) available for analysis, expand the geographical...
Evaluation of quality-control data collected by the U.S. Geological Survey for routine water-quality activities at the Idaho National Laboratory and vicinity, southeastern Idaho, 2002-08
Gordon W. Rattray
2014, Scientific Investigations Report 2014-5027
Quality-control (QC) samples were collected from 2002 through 2008 by the U.S. Geological Survey, in cooperation with the U.S. Department of Energy, to ensure data robustness by documenting the variability and bias of water-quality data collected at surface-water and groundwater sites at and near the Idaho National Laboratory. QC samples...
Surface-water and karst groundwater interactions and streamflow-response simulations of the karst-influenced upper Lost River watershed, Orange County, Indiana
E. Randall Bayless, Peter J. Cinotto, Randy L. Ulery, Charles J. Taylor, Gregory K. McCombs, Moon H. Kim, Hugh L. Nelson
2014, Scientific Investigations Report 2014-5028
The U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers (USACE) and the Indiana Office of Community and Rural Affairs (OCRA), conducted a study of the upper Lost River watershed in Orange County, Indiana, from 2012 to 2013. Streamflow and groundwater data were collected at 10...
Assessment of sediments in the riverine impoundments of national wildlife refuges in the Souris River Basin, North Dakota
Brian A. Tangen, Murray K. Laubhan, Robert A. Gleason
2014, Scientific Investigations Report 2014-5018
Accelerated sedimentation of reservoirs and riverine impoundments is a major concern throughout the United States. Sediments not only fill impoundments and reduce their effective life span, but they can reduce water quality by increasing turbidity and introducing harmful chemical constituents such as heavy metals, toxic elements, and nutrients. U.S. Fish...
Simulation of groundwater flow in the "1,500-foot" sand and "2,000-foot" sand, with scenarios to mitigate saltwater migration in the "2,000-foot" sand of the Baton Rouge area, Louisiana
Charles E. Heywood, Jason M. Griffith, John K. Lovelace
2014, Scientific Investigations Report 2013-5227
Groundwater withdrawals have caused saltwater to encroach into freshwater-bearing aquifers beneath Baton Rouge, Louisiana. Groundwater investigations in the 1960s identified a freshwater-saltwater interface located at the Baton Rouge Fault, across which abrupt changes in water levels occur. Aquifers south of the fault generally contain saltwater, and aquifers north of the...
Quantifying benthic nitrogen fluxes in Puget Sound, Washington: a review of available data
Richard W. Sheibley, Anthony J. Paulson
2014, Scientific Investigations Report 2014-5033
Understanding benthic fluxes is important for understanding the fate of materials that settle to the Puget Sound, Washington, seafloor, as well as the impact these fluxes have on the chemical composition and biogeochemical cycles of marine waters. Existing approaches used to measure benthic nitrogen flux in Puget Sound and elsewhere...
Water-quality trends for selected sampling sites in the upper Clark Fork Basin, Montana, water years 1996-2010
Steven K. Sando, Aldo V. Vecchia, David L. Lorenz, Elliott P. Barnhart
2014, Scientific Investigations Report 2013-5217
A large-scale trend analysis was done on specific conductance, selected trace elements (arsenic, cadmium, copper, iron, lead, manganese, and zinc), and suspended-sediment data for 22 sites in the upper Clark Fork Basin for water years 1996–2010. Trend analysis was conducted by using two parametric methods: a time-series model (TSM) and...
Evaluation of the expected moments algorithm and a multiple low-outlier test for flood frequency analysis at streamgaging stations in Arizona
Nicholas V. Paretti, Jeffrey R. Kennedy, Timothy A. Cohn
2014, Scientific Investigations Report 2014-5026
Flooding is among the costliest natural disasters in terms of loss of life and property in Arizona, which is why the accurate estimation of flood frequency and magnitude is crucial for proper structural design and accurate floodplain mapping. Current guidelines for flood frequency analysis in the United States are described...
Simulation of groundwater flow pathlines and freshwater/saltwater transition zone movement, Manhasset Neck, Nassau County, New York
Paul Misut, Omkar Aphale
2014, Scientific Investigations Report 2013-5201
A density-dependent groundwater flow and solute transport model of Manhasset Neck, Long Island, New York, was used to analyze (1) the effects of seasonal stress on the position of the freshwater/saltwater transition zone and (2) groundwater flowpaths. The following were used in the simulation: 182 transient stress periods, representing the...
Digital surfaces and thicknesses of selected hydrogeologic units within the Ozark Plateaus aquifer system, northwestern Arkansas
John B. Czarnecki, Susan E. Bolyard, Rheannon M. Hart, Jimmy M. Clark
2014, Scientific Investigations Report 2013-5208
Digital surfaces and thicknesses of nine hydrogeologic units of the Ozark Plateaus aquifer system from land surface to the top of the Gunter Sandstone in northwestern Arkansas were created using geophysical logs, drillers’ logs, geologist-interpreted formation tops, and previously published maps. The 6,040 square mile study area in the Ozark...
A deposit model for carbonatite and peralkaline intrusion-related rare earth element deposits
Philip L. Verplanck, Bradley S. Van Gosen, Robert R. Seal II, Anne E. McCafferty
2014, Scientific Investigations Report 2010-5070-J
Carbonatite and alkaline intrusive complexes, as well as their weathering products, are the primary sources of rare earth elements. A wide variety of other commodities have been exploited from carbonatites and alkaline igneous rocks including niobium, phosphate, titanium, vermiculite, barite, fluorite, copper, calcite, and zirconium. Other elements enriched in these...
Occurrence and origin of Escherichia coli in water and sediments at two public swimming beaches at Lake of the Ozarks State Park, Camden County, Missouri, 2011-13
Jordan L. Wilson, John G. Schumacher, Joel G. Burken
2014, Scientific Investigations Report 2014-5005
In the past several years, the Missouri Department of Natural Resources has closed two popular public beaches, Grand Glaize Beach and Public Beach 1, at Lake of the Ozarks State Park in Osage Beach, Missouri when monitoring results exceeded the established Escherichia coli (E. coli) standard. As a result of...
Porphyry copper assessment of Central America and the Caribbean Basin
Floyd Gray, Jane M. Hammarstrom, Stephen Ludington, Lukas Zürcher, Carl E. Nelson, Gilpin R. Robinson Jr., Robert J. Miller, Barry C. Moring
2014, Scientific Investigations Report 2010-5090-I
Mineral resource assessments provide a synthesis of available information about distributions of mineral deposits in the Earth’s crust. The U.S. Geological Survey prepared a probabilistic mineral resource assessment of undiscovered resources in porphyry copper deposits in Central America and the Caribbean Basin in collaboration with geoscientists from academia and the...
Assessment of undiscovered sandstone copper deposits of the Kodar-Udokan area, Russia
Michael L. Zientek, Vladimir S. Chechetkin, Heather L. Parks, Stephen E. Box, Deborah A. Briggs, Pamela M. Cossette, Alla Dolgopolova, Timothy S. Hayes, Reimar Seltmann, Boris Syusyura, Cliff D. Taylor, Niki E. Wintzer
2014, Scientific Investigations Report 2010-5090-M
Mineral resource assessments integrate and synthesize available information as a basis for estimating the location, quality, and quantity of undiscovered mineral resources. This probabilistic mineral resource assessment of undiscovered sandstone copper deposits within Paleoproterozoic metasedimentary rocks of the Kodar-Udokan area in Russia is a contribution to a global assessment led...
Mean annual, seasonal, and monthly precipitation and runoff in Arkansas, 1951-2011
Aaron L. Pugh, Drew A. Westerman
2014, Scientific Investigations Report 2014-5006
This report describes long-term annual, seasonal, and monthly means for precipitation and runoff in Arkansas for the period from 1951 through 2011. Precipitation means were estimated using data from the Parameter-elevation Regressions on Independent Slopes Model database; while total runoff, groundwater runoff, and surface runoff means were estimated using data...
Water movement through the unsaturated zone of the High Plains Aquifer in the Central Platte Natural Resources District, Nebraska, 2008-12
Gregory V. Steele, Jason J. Gurdak, Christopher M. Hobza
2014, Scientific Investigations Report 2014-5008
Uncertainty about the effects of land use and climate on water movement in the unsaturated zone and on groundwater recharge rates can lead to uncertainty in water budgets used for groundwater-flow models. To better understand these effects, a cooperative study between the U.S. Geological Survey and the Central Platte Natural...
Potentiometric surface of the Ozark aquifer in northern Arkansas, 2010
John B. Czarnecki, Aaron L. Pugh, Joshua M. Blackstock
2014, Scientific Investigations Report 2014-5013
The Ozark aquifer in northern Arkansas is composed of dolomite, limestone, sandstone, and shale of Late Cambrian to Middle Devonian age and ranges in thickness from approximately 1,100 feet to more than 4,000 feet. Hydrologically, the aquifer is complex, characterized by discrete and discontinuous flow components with large variations in...
A velocimetric survey of the Lower Missouri River from river mile 492.38 to 290.20, July-October 2011 and July 2012
Daniel J. Armstrong, Donald H. Wilkison, Richard D. Norman
2014, Scientific Investigations Report 2013-5197
Velocimetric surveys were made by the U.S. Geological Survey in 2011 and 2012 to provide data for the U.S. Army Corps of Engineers’ ongoing study of bed degradation in the Lower Missouri River. Using Acoustic Doppler Current Profile technology, velocity data were collected at 87 river miles along the Lower...