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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Aquifer susceptibility to perchlorate contamination in a highly urbanized environment
Perchlorate contamination from anthropogenic sources has been released into the Rialto-Colton, California, USA, groundwater flow system since the 1940s during its production, distribution, storage, and use. Preliminary analysis of lithological, geophysical, and water-chemistry data provided new understanding of the pathways of perchlorate migration that aid in assessing the susceptibility of drink
Authors
Linda R. Woolfenden
ASAR images a diverse set of deformation patterns at Kilauea volcano, Hawai'i
Since 2003, 27 independent look angles have been acquired by ENVISAT’s Advanced Synthetic Aperture Radar (ASAR) instrument over the island of Hawai`i, allowing for the formation of thousands of interferograms showing deformation of the ground surface. On Kīlauea volcano, a transition from minor to broad-scale summit inflation was observed by interferograms that span 2003 to 2006. In addition, rada
Authors
Michael P. Poland
Barrier island vulnerability to breaching: a case study on Dauphin Island, Alabama
Breaching of barrier islands can adversely impact society by severing infrastructure, destroying private properties, and altering water quality in back bays and estuaries. This study provides a scheme that assesses the relative vulnerability of a barrier island to breach during storms. Dauphin Island, Alabama was selected for this study because it has a well documented history of island breaches a
Authors
Mark Hansen, Asbury H. Sallenger
Bedload research international cooperative: BRIC
No abstract available.
Authors
John R. Gray, Jonathan B. Laronne, Waite Osterkamp
Biogeographic affinity helps explain productivity-richness relationships at regional and local scales
The unresolved question of what causes the observed positive relationship between large-scale productivity and species richness has long interested ecologists and evolutionists. Here we examine a potential explanation that we call the biogeographic affinity hypothesis, which proposes that the productivity-richness relationship is a function of species' climatic tolerances that in turn are shaped b
Authors
S. Harrison, J.B. Grace
Canadian and U.S. Cooperation for the development of standards and specifications for emerging mapping technologies
The mapping community is witnessing significant advances in available sensors, such as medium format digital cameras (MFDC) and Light Detection and Ranging (LiDAR) systems. In this regard, the Digital Photogrammetry Research Group (DPRG) of the Department of Geomatics Engineering at the University of Calgary has been actively involved in the development of standards and specifications for regulati
Authors
A. Habib, A. Jarvis, M. M. Al-Durgham, J. Lay, P. Quackenbush, G. Stensaas, D. Moe
Characterisation and modelling of washover fans
Pre- and post-storm topography and aerial photography, collected in regions where new washover fans were formed, were studied to determine the extent of morphologic, vegetative and anthropogenic control on washover shape and extent. When overwash is funnelled through a gap in a dune ridge and then spreads laterally on the back barrier, decelerating and depositing sediment, it forms washover fans.
Authors
Chantal Donnelly, Asbury H. Sallenger
Characterization of Toxoplasma gondii from raccoons (Procyon lotor), coyotes (Canis latrans), and striped skunks (Mephitis mephitis) in Wisconsin identified several atypical genotypes
During 2005-2006, sera and tissues from raccoons (Procyon lotor), coyotes (Canis latrans), and skunks (Mephitis mephitis) from the state of Wisconsin were tested for Toxoplasma gondii infection. Antibodies to T. gondii were found in 32 of 54 (59.2%) raccoons, 18 of 35 (51.4%) coyotes, and 5 of 7 (71.4%) skunks using the modified agglutination test and a cut-off titer of 1:20. Pooled tissues (brain
Authors
J. P. Dubey, N. Sundar, C.A. Nolden, M. D. Samuel, G. V. Velmurugan, L.A. Bandini, O. C. H. Kwok, B. Bodenstein, C. Su
Characterizing a December 2005 density current event in the Chicago River, Chicago, Illinois
During the winter months, the Chicago River in Chicago, Illinois is subject to bi-directional flows, and density currents are thought to be responsible for these flow variations. This paper presents detailed field measurements using three acoustic Doppler current profiler instruments and simultaneous water-quality measurements made during December 2005. Observations indicate that the formation of
Authors
C.M. Garcia, P.R. Jackson, K. A. Oberg, K. K. Johnson, M.H. Garcia
Chemistry of water collected from an unventilated drift, Yucca Mountain, Nevada
Water samples (referred to as puddle water samples) were collected from the surfaces of a conveyor belt and plastic sheeting in the unventilated portion of the Enhanced Characterization of the Repository Block (ECRB) Cross Drift in 2003 and 2005 at Yucca Mountain, Nevada. The chemistry of these puddle water samples is very different than that of pore water samples from borehole cores in the same r
Authors
B.D. Marshall, T.A. Oliver, Z. E. Peterman
Chesapeake Inundation Prediction System (CIPS): A regional prototype for a national problem
Recent Hurricanes Katrina and Isabel, among others, not only demonstrated their immense destructive power, but also revealed the obvious, crucial need for improved storm surge forecasting and information delivery to save lives and property in future storms. Current operational methods and the storm surge and inundation products do not adequately meet requirements needed by Emergency Managers (EMs)
Authors
B. Stamey, W. Smith, K. Carey, D. Garbin, F. Klein, Hongfang Wang, J. Shen, W. Gong, J. Cho, D. Forrest, C. Friedrichs, W. Boicourt, M. Li, M. Koterba, D. King, J. Titlow, E. Smith, A. Siebers, J. Billet, J. Lee, Douglas R. Manning, G. Szatkowski, D. Wilson, P. Ahnert, J. Ostrowski
Chronology of the last glacial maximum in the upper Bear River Basin, Utah
The headwaters of the Bear River drainage were occupied during the Last Glacial Maximum (LGM) by outlet glaciers of the Western Uinta Ice Field, an extensive ice mass (???685 km2) that covered the western slope of the Uinta Mountains. A well-preserved sequence of latero-frontal moraines in the drainage indicates that outlet glaciers advanced beyond the mountain front and coalesced on the piedmont.
Authors
B.J.C. Laabs, Jeffrey S. Munroe, J. G. Rosenbaum, K.A. Refsnider, D.M. Mickelson, B. S. Singer, M.W. Caffee