Conference Papers
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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Potential-scour assessments at 130 bridges in Iowa Potential-scour assessments at 130 bridges in Iowa
No abstract available.
Authors
E.E. Fischer
Preliminary estimates of ground-motion amplification for the Northridge and Hyogo-ken Earthquakes of January 17, 1994 and 1995 Preliminary estimates of ground-motion amplification for the Northridge and Hyogo-ken Earthquakes of January 17, 1994 and 1995
No abstract available.
Authors
Roger D. Borcherdt
A high-performance liquid chromatography-based screening method for the analysis of atrazine, alachlor, and ten of their transformation products A high-performance liquid chromatography-based screening method for the analysis of atrazine, alachlor, and ten of their transformation products
No abstract available.
Authors
B.R. Schroyer, P. D. Capel
Volatile organic compounds in surface water and ground water in parts of the Upper Mississippi River Basin, 1998-94 Volatile organic compounds in surface water and ground water in parts of the Upper Mississippi River Basin, 1998-94
No abstract available.
Authors
J. R. Stark, W. J. Andrews, J. D. Fallon, S. E. Kroening
The Topography of Asteroid Ida: A Comparison between Photogrammetric and ShapeForm-Shading Image Analysis The Topography of Asteroid Ida: A Comparison between Photogrammetric and ShapeForm-Shading Image Analysis
We derived high resolution Digital Terrain Models from stereo images of the asteroid Ida that were obtained by the Galileo spacecraft during the flyby in August 1993 and compared these results with terrain models derived from two-dimensional photoclinometry. The comparison shows that there are striking discrepancies between the results from the two models depending on the spatial scale...
Authors
Bernd Giese, Juergen Oberst, Randolph L. Kirk, W. Zeitler
Ecosystem management: A decision support GIS approach Ecosystem management: A decision support GIS approach
This paper describes a new approach using decision support GIS for handling information in ecosystem management. Technical research efforts resulted in specialized spatial decision support systems for wetland restoration planning, wetland permit analysis, and wildlife research and management. These applications are briefly presented to illustrate the usage of the methodology. With its...
Authors
Wei Ji
Potential-Scour Assessments at 130 Bridges in Iowa Potential-Scour Assessments at 130 Bridges in Iowa
A total of 130 highway bridges in Iowa were assessed for potential scour using a potential-scour index developed by the U.S. Geological Survey for a bridge-scour study in western Tennessee. Greater values of the index, which is composed of 11 components, suggest a greater likelihood of scour-related problems occurring at a bridge. For the Iowa assessments, the minimum value was 3, the...
Authors
Edward E. Fischer
Application and limitations of dendrogeomorphic method to estimate sedimentation rate in the Kankakee River flood plain in Illinois Application and limitations of dendrogeomorphic method to estimate sedimentation rate in the Kankakee River flood plain in Illinois
No abstract available.
Authors
Gary P. Johnson
Techniques for visualizing urban growth using a temporal GIS database Techniques for visualizing urban growth using a temporal GIS database
No abstract available.
Authors
Penny Masuoka, William Acevedo, S. Fifer, Timothy W. Foresman, M. Tuttle
Development of the temporal transportation database for the analysis of urban development in the Baltimore-Washington region Development of the temporal transportation database for the analysis of urban development in the Baltimore-Washington region
The U.S. Geological Survey is participating in a joint effort with the University of Maryland Baltimore County and other government agencies to construct a dynamic database of urban development for the Baltimore-Washington region from the late-1700's to the 1990's. The multi-theme temporal database includes a principal transportation data layer that documents the primary roads, railroads...
Authors
Susan C. Clark, John Starr, Timothy W. Foresman, William Acevedo, Carol Solomon
Origins and philosophy of building a temporal database to examine human transformation processes Origins and philosophy of building a temporal database to examine human transformation processes
The U.S. Geological Survey (USGS), in partnership with the University of Maryland Baltimore County, is using historical maps and satellite images to map human-induced land transformations for the Baltimore-Washington metropolitan area. This work builds on an earlier effort that documented the historical urban development for the San Francisco Bay area. That effort used a geographic...
Authors
William Acevedo, Timothy W. Foresman, Janis T. Buchanan
Trace elements and organic contaminants in stream sediments from the Red River of the North Basin Trace elements and organic contaminants in stream sediments from the Red River of the North Basin
To assess the presence and distribution of a variety of hydro-phobic chemicals in streams in the Red River of the North Basin, bottom sediments were analyzed for trace elements, organochlorines, and polycyclic aromatic hydrocarbons (PAHs). Glaciolacustrine clays and carbonate minerals are common in fine sediments of the region, and can help explain the distribution of many elements...
Authors
M. E. Brigham, L. H. Tornes