Conference Papers
Science Quality and Integrity
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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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Using strip-transect aerial surveys to estimate manatee abundance and population trend in the Ten Thousand Islands Region of southwest Florida Using strip-transect aerial surveys to estimate manatee abundance and population trend in the Ten Thousand Islands Region of southwest Florida
No abstract available.
Authors
Dean E. Easton, Lynn W. Lefebvre, T.J. Doyle
Volcanic debris flows in developing countries - The extreme need for public education and awareness of debris-flow hazards Volcanic debris flows in developing countries - The extreme need for public education and awareness of debris-flow hazards
In many developing countries, volcanic debris flows pose a significant societal risk owing to the distribution of dense populations that commonly live on or near a volcano. At many volcanoes, modest volume (up to 500,000 m 3) debris flows are relatively common (multiple times per century) and typically flow at least 5 km along established drainages. Owing to typical debris-flow...
Authors
J. J. Major, S. P. Schilling, C.R. Pullinger
Web-based data delivery services in support of disaster-relief applications Web-based data delivery services in support of disaster-relief applications
The U.S. Geological Survey Earth Resources Observation Systems Data Center responds to emergencies in support of various government agencies for human-induced and natural disasters. This response consists of satellite tasking and acquisitions, satellite image registrations, disaster-extent maps analysis and creation, base image provision and support, Web-based mapping services for...
Authors
Brenda K. Jones, Ron R. Risty, M. Buswell
Wildfire-related debris-flow generation through episodic progressive sediment-bulking processes, western USA Wildfire-related debris-flow generation through episodic progressive sediment-bulking processes, western USA
Debris-flow initiation processes on hillslopes recently burned by wildfire differ from those generally recognized on unburned, vegetated hillslopes. These differences result from fire-induced changes in the hydrologic response to rainfall events. In this study, detailed field and aerial photographic mapping, observations, and measurements of debris-flow events from three sites in the...
Authors
S.H. Cannon, J.E. Gartner, C. Parrett, M. Parise
Detection and mapping of fractures and cavities using borehole radar Detection and mapping of fractures and cavities using borehole radar
Borehole radar can be used in a single-hole reflection mode or in a cross-hole tomography mode. In the reflection mode, radar provides an image of discontinuities in the bedrock surrounding a borehole, including bedding planes, lithologic contacts, fractures, and cavities. The measurements are either directional or omni-directional, depending upon the type of equipment and antennas. In...
Authors
F.P. Haeni, Lucien Halleux, Carole D. Johnson, John W. Lane
Integrated geophysical characterization of the Winthrop Landfill Southern Flow Path, Winthrop, Maine Integrated geophysical characterization of the Winthrop Landfill Southern Flow Path, Winthrop, Maine
The U.S. Geological Survey (USGS), in cooperation with United Technologies Corporation, used an integrated suite of borehole, surface, and water-borne geophysical methods near the site of the former Winthrop Landfill, Winthrop, Maine, to investigate the hydrogeology controlling the transport of leachate from the landfill to nearby Annabessacook Lake. During the fall of 2000 and summer of...
Authors
Cian B. Dawson, John W. Lane, Eric A. White, Marcel Belaval
Use of vertical-radar profiling to estimate porosity at two New England sites and comparison with neutron log porosity Use of vertical-radar profiling to estimate porosity at two New England sites and comparison with neutron log porosity
No abstract available.
Authors
Marc L. Buursink, John W. Lane, W.P. Clement, Michael D. Knoll
Issues in characterizing phenology from satellite observations Issues in characterizing phenology from satellite observations
Over the past decade, many investigators have published techniques for deriving phenological parameters, especially the start of the growing season (SOS), from time-series satellite imagery. The principal satellite sensor for these studies is the advanced very high resolution radiometer (AVHRR). This study investigates the characteristics of four of the primary methods for identifying...
Authors
B. C. Reed, J.F. Brown
Historical trend in ice thickness on the Piscataquis River in central Maine. Historical trend in ice thickness on the Piscataquis River in central Maine.
We analyzed a long-term record of ice thickness on the Piscataquis River in central Maine to determine whether there were temporal trends that were associated with climate warming. Trends in ice thickness were compared and correlated with regional time series of winter air temperature, heating degree days (HDD) , date of river ice-out, seasonal center-of-volume date (SCVD) (date on which...
Authors
Thomas G. Huntington, Robert W. Dudley, Glenn A. Hodgkins
Evaluating the performance of a crop water balance model in estimating regional crop production Evaluating the performance of a crop water balance model in estimating regional crop production
The comparison between a spatially distributed crop index and reported yield was evaluated. The crop index was generated by a crop water balance model that simulates the reduction of crop yield (as a percentage of the potential) due to water deficit. This model is currently operational as a monitoring and forecasting tool for region-wide food security analyses in drought prone countries...
Authors
Gabriel B. Senay, James Verdin
A thumbnail sketch of what governments around the world are doing to reduce the consequence of landslides A thumbnail sketch of what governments around the world are doing to reduce the consequence of landslides
No abstract available.
Authors
Earl E. Brabb, David G. Howell, W. R. Cotton
Distinctive meteoritic components in lunar “cataclysm” impact melt breccias Distinctive meteoritic components in lunar “cataclysm” impact melt breccias
No abstract available.
Authors
Odette B. James