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

46734 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 1037, results 25901 - 25925

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Raster dataset showing the probability of elevated concentrations of nitrate in ground water in Colorado, hydrogeomorphic regions and fertilizer use estimates included
Michael G. Rupert
2003, Open-File Report 2003-234
This dataset is one of eight datasets produced by this study. Four of the datasets predict the probability of detecting atrazine and(or) desethyl-atrazine (a breakdown product of atrazine) in ground water in Colorado; the other four predict the probability of detecting elevated concentrations of nitrate in ground water in Colorado. The four datasets that predict...
Residue depletion of oxytetracycline from fillet tissues of northern pike and walleye
Jeffry A. Bernardy, Chue Vue, Mark P. Gaikowski, Guy R. Stehly, William H. Gingerich, Allen Moore
2003, Aquaculture (221) 657-665
The broad-spectrum antibacterial drug oxytetracycline (OTC) is used in the U.S. to treat certain diseases in salmonids and catfish. This study was conducted to support an extension of the OTC label to include all cool-water fish species cultured at U.S. public aquaculture facilities by satisfying human food safety requirements. Juvenile...
Identifying relationships between baseflow geochemistry and land use with synoptic sampling and R-mode factor analysis
Karen G. Wayland, David T. Long, David W. Hyndman, Bryan C. Pijanowski, Sarah M. Woodhams, Sheridan K. Haak
2003, Journal of Environmental Quality (32) 180-190
The relationship between land use and stream chemistry is often explored through synoptic sampling of rivers at baseflow conditions. However, baseflow chemistry is likely to vary temporally and spatially with land use. The purpose of our study is to examine the usefulness of the synoptic sampling approach for identifying the relationship between complex land use configurations and stream water quality. This study compares biogeochemical data from three synoptic sampling events representing the temporal variability of baseflow chemistry...
Preliminary geologic map of the northeast Dillingham quadrangle (D-1, D-2, C-1, and C-2), Alaska
Frederic H. Wilson, Travis L. Hudson, Donald Grybeck, Douglas B. Stoeser, Cindi C. Preller, Damon Bickerstaff, Keith A. Labay, Marti L. Miller
2003, Open-File Report 2003-105
Open-File Report 03-105 contains a digital geologic map database for the northeast part of the Dillingham 1:250,000-scale quadrangle, specifically the D-1, D-2, C-1, and C-2 1:63,360-scale map sheets. The report includes:A Postscript file showing the geologic map on a topographic and land-grid base, and containing a Correlation of Map Units...
Hydrogeology and Ground-Water Quality of Brunswick County, North Carolina
Stephen L. Harden, Jason M. Fine, Timothy B. Spruill
2003, Water-Resources Investigations Report 2003-4051
Brunswick County is the southernmost coastal county in North Carolina and lies in the southeastern part of the Coastal Plain physiographic province. In this report, geologic, hydrologic, and chemical data were used to investigate and delineate the hydrogeologic framework and ground-water quality of Brunswick County. The major aquifers and their...
Use of a probabilistic neural network to reduce costs of selecting construction rock
Donald A. Singer, James D. Bliss
2003, Natural Resources Research (12) 135-140
Rocks used as construction aggregate in temperate climates deteriorate to differing degrees because of repeated freezing and thawing. The magnitude of the deterioration depends on the rock's properties. Aggregate, including crushed carbonate rock, is required to have minimum geotechnical qualities before it can be used in asphalt and concrete. In...
Phosphorus in a ground-water contaminant plume discharging to Ashumet Pond, Cape Cod, Massachusetts, 1999
Timothy D. McCobb, Denis R. LeBlanc, Donald A. Walter, Kathryn M. Hess, Douglas B. Kent, Richard L. Smith
2003, Water-Resources Investigations Report 2002-4306
The discharge of a plume of sewagecontaminated ground water emanating from the Massachusetts Military Reservation to Ashumet Pond on Cape Cod, Massachusetts, has caused concern about excessive loading of nutrients, particularly phosphorus, to the pond. The U.S. Air Force is considering remedial actions to mitigate potentially adverse effects on the...
Preliminary publications book 2 from project on mineral resources, metallogenesis, and tectonics of northeast Asia
Warren J. Nokleberg, Robert J. Miller, Vera V. Naumova, Alexander I. Khanchuk, Leonid M. Parfenov, Mikhail I. Kuzmin, Tatiana M. Bounaeva, Alexander A. Obolenskiy, Sergey M. Rodionov, Zhan V. Seminskiy, Michael F. Diggles
2003, Open-File Report 2003-203
This is the Web version of a CD-ROM publication. This report consists of summary major compilations and syntheses accomplished in the six-year project through April 2003 for the study on the Mineral Resources, Metallogenesis, and Tectonics of Northeast Asia (Eastern and Southern Siberia, Mongolia, Northeastern China, South Korea, and Japan)....
Reactive-transport simulation of phosphorus in the sewage plume at the Massachusetts Military Reservation, Cape Cod, Massachusetts
David L. Parkhurst, Kenneth G. Stollenwerk, John A. Colman
2003, Water-Resources Investigations Report 2003-4017
The subsurface transport of phosphorus introduced by the disposal of treated sewage effluent to ground-infiltration disposal beds at the Massachusetts Military Reservation on western Cape Cod was simulated with a three-dimensional reactive-transport model. The simulations were used to estimate the load of phosphorus transported to Ashumet Pond during operation of...
Preliminary metallogenic belt and mineral deposit maps for northeast Asia
Alexander A. Obolenskiy, Sergey M. Rodionov, Gunchin Dejidmaa, Ochir Gerel, Duk-Hwan Hwang, Elimir G. Distanov, Gombosuren Badarch, Alexander I. Khanchuk, Masatsugu Ogasawara, Warren J. Nokleberg, Leonid M. Parfenov, Andrei V. Prokopiev, Zhan V. Seminskiy, Alexander P. Smelov, Hongquan Yan, Gennandiy V. Birul’kin, Yuriy Davydov, Valeriy Yu. Fridovskiy, Gennandiy N. Gamyanin, Alexei V. Kostin, Sergey A. Letunov, Xujun Li, Valeriy M. Nikitin, Sadahisa Sotnikov, Vitaly I. Sudo, Alexander V. Spiridonov, Vitaly A. Stepanov, Fengyue Sun, Jiapeng Sun, Weizhi Sun, Valeriy M. Supletsov, Vladimir F. Timofeev, Oleg A. Tyan, Valeriy G. Vetluzhskikh, Koji Wakita, Yakov V. Yakovlev, Lydia M. Zorina
2003, Open-File Report 2003-204
The metallogenic belts and locations of major mineral deposits of Northeast Asia are portrayed on Sheets 1-4. Sheet 1 portrays the location of significant lode deposits and placer districts at a scale of 1:7,500,000. Sheets 2-4 portray the metallogenic belts of the region in a series of 12 time-slices from...
Comparison of salinity and temperature at continuous monitoring stations and nearby monthly measurement sites in San Francisco Bay
L.G. Bergfeld, D. H. Schoellhamer
2003, Interagency Ecological Program Newsletter 5-12
Salinity and temperature are crucial state variables affecting estuarine habitat an d, thus, are measured by various San Francisco Estuary programs. This article presents a comparison of salinity and temperature data collected at seven continuo us monitoring stations throughout San Francisco Bay (Figure 1) with data collected monthly by the...
Relations of biological indicators to nutrient data for lakes and streams in Pennsylvania and West Virginia, 1990-98
Robin A. Brightbill, Edward H. Koerkle
2003, Water-Resources Investigations Report 2003-4033
The Clean Water Action Plan of 1998 provides a blueprint for federal agencies to work with states, tribes, and other stakeholders to protect and restore the Nation's water resources. The plan includes an initiative that addresses the nutrient-enrichment problem of lakes and streams across the United States. The U.S. Environmental...
Surface-water hydrologic data for the Houston metropolitan area, Texas, water years 1990-95
Debra A. Sneck-Fahrer, Fred Liscum, Jeffery W. East
2003, Open-File Report 2003-70
During water years 1990–95, data were collected at 24 U.S. Geological Survey streamflow-gaging stations, 21 rain gages, and 6 water-quality stations in the Houston metropolitan area, Texas. The data were collected as part of the Houston Urban Runoff Program, which began in water year 1964. Annual peaks were defined for...
Uncertainty in spatially explicit animal dispersal models
Wolf M. Mooij, Donald L. DeAngelis
2003, Ecological Applications (13) 794-805
Uncertainty in estimates of survival of dispersing animals is a vexing difficulty in conservation biology. The current notion is that this uncertainty decreases the usefulness of spatially explicit population models in particular. We examined this problem by comparing dispersal models of three levels of complexity: (1) an event-based binomial model...
Preliminary northeast Asia geodynamics map
Leonid M. Parfenov, Alexander I. Khanchuk, Gombosuren Badarch, Robert J. Miller, Vera V. Naumova, Warren J. Nokleberg, Masatsugu Ogasawara, Andrei V. Prokopiev, Hongquan Yan
2003, Open-File Report 2003-205
This map portrays the geodynamics of Northeast Asia at a scale of 1:5,000,000 using the concepts of plate tectonics and analysis of terranes and overlap assemblages. The map is the result of a detailed compilation and synthesis at 5 million scale and is part of a major international collaborative study...
A longitudinal assessment of the aquatic macroinvertebrate community in the channelized lower Missouri River
Barry C. Poulton, Mark L. Wildhaber, Collette S. Charbonneau, James F. Fairchild, Brad G. Mueller, Christopher J. Schmitt
2003, Environmental Monitoring and Assessment (85) 23-53
We conducted an aquatic macroinvertebrate assessment in the channelized reach of the lower Missouri River, and used statistical analysis of individual metrics and multimetric scores to identify community response patterns and evaluate relative biological condition. We examined longitudinal site differences that are potentially associated with water qualityrelated factors originating from...
Geochemistry, geochronology, mineralogy, and geology suggest sources of and controls on mineral systems in the southern Toquima Range, Nye County, Nevada
Daniel R. Shawe, James D. Hoffman, Bruce R. Doe, Eugene E. Foord, Holly J. Stein, Robert A. Ayuso
2003, Miscellaneous Field Studies Map 2327-C
Geochemistry maps showing the distribution and abundance of 18 elements in about 1,400 rock samples, both mineralized and unmineralized, from the southern Toquima Range, Nev., indicate major structural and lithologic controls on mineralization, and suggest sources of the elements. Radiometric age data, lead mineralogy and paragenesis data, and lead-isotope data...