Conference Papers
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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.
Filter Total Items: 5346
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
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 length of s
Authors
Bernd Giese, Juergen Oberst, Randolph L. Kirk, W. Zeitler
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 powerful cap
Authors
Wei Ji
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 median value
Authors
Edward E. Fischer
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
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
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, and othe
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
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 information sys
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
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. Aluminum (Al
Authors
M. E. Brigham, L. H. Tornes
Concepts for an index of biotic integrity for streams of the Red River of the North Basin
No abstract available.
Authors
R. M. Goldstein, T.P. Simon, P.A. Bailey, Michael Ell, Eric Pearson, Konrad Schmidt, J.W. Enblom
Regional land cover characterization using multiple sources of intermediate-scale data
Many United States federal agencies need accurate, intermediate scaled, land cover information. While many techniques and approaches have been successfully used to classify land cover in relatively small regions, there are substantial problems in applying these techniques to large multi-scene regions. An evaluation was conducted of the multiple layer land characteristics data base approach for gen
Authors
James Vogelmann, S. M. Howard, Terry L. Sohl
Pliocene–Pleistocene pollen assemblages from the Yermak Plateau, Arctic Ocean: Sites 910 and 911
Palynological and paleobotanical research on upper Pliocene sediments from Meighen Island, Kap København, and deep-sea sites in the North Atlantic Ocean has indicated the presence of forest tundra far north of its present limits and warmer conditions than present. New pollen data from samples obtained on Ocean Drilling Program Leg 151 (Sites 910 and 911) on the Yermak Plateau of the Arctic Ocean p
Authors
Debra A. Willard