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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Hindcasting potential hurricane impacts on rapidly changing barrier islands
Hindcasts of the coastal impact of Hurricane Ivan on Santa Rosa Island, Florida, using a storm-impact scaling model that compares hurricane-induced water levels to local dune morphology, were found to have an accuracy of 68% in predicting the occurrence of one of four impact regimes: swash, collision, overwash, and inundation. Errors were overwhelming under-predictions of the regime where the obse
Authors
H.F. Stockdon, D.M. Thompson, A. H. Sallenger
Holocene evolution of the merrimack embayment, northern massachusetts, interperted from shallow seismic stratigraphy
Recent multi-beam, backscatter, and bottom sediment data demonstrate that a large sand sheet was formed in the inner shelf by the reworking of the Merrimack River lowstand delta and braid plain (12 kya) during the Holocene transgression. Seismic data reveal the presence of widespread channel cut-and-fill structures landward of the delta suggesting that much of the sand sheet consists of braided st
Authors
C.J. Hein, D. M. FitzGerald, W. A. Barnhardt
Hydrology and water quality in two mountain basins of the northeastern US: Assessing baseline conditions and effects of ski area development
Mountain regions throughout the world face intense development pressures associated with recreational and tourism uses. Despite these pressures, much of the research on bio-geophysical impacts of humans in mountain regions has focused on the effects of natural resource extraction. This paper describes findings from the first 3 years of a study examining high elevation watershed processes in a regi
Authors
B. Wemple, J. Shanley, J. Denner, D. Ross, K. Mills
Impacts of the 2004 Indian ocean tsunami on the southwest coasts of Sri Lanka
The 2004 Indian Ocean tsunami caused major landscape changes along the southwest coasts of Sri Lanka that were controlled by the flow, natural topography and bathymetry, and anthropogenic modifications of the terrain. Landscape changes included substantial beach erosion and scouring of return-flow channels near the beach, and deposition of sand sheets across the narrow coastal plain. In many areas
Authors
Robert A. Morton, John A. Goff, Scott L. Nichol
Implementing regional sediment management to sustain navigation at an energetic tidal inlet
Regional Sediment Management (RSM) is a systems-based approach for managing multiple projects involving sediment. RSM fosters balance between infrastructure and natural system processes, resulting in reduced project costs and achievement of greater benefits. This paper introduces the RSM concept and describes how RSM is being implemented at the Mouth of the Columbia River to sustain the inlet's 10
Authors
H.R. Moritz, G.R. Gelfenbaum, G. M. Kaminsky, P. Ruggiero, J. Oltman-shay, D.J. Mckillip
Improved outgassing models for the Landsat-5 thematic mapper
The Landsat-5 (L5) Thematic Mapper (TM) detectors of the short wave infrared (SWIR) bands 5 and 7 are maintained on cryogenic temperatures to minimize thermal noise and allow adequate detection of scene energy. Over the instrument's lifetime, gain oscillations are observed in these bands that are caused by an ice-like contaminant that gradually builds up on the window of a dewar that houses these
Authors
E. Micijevic, G. Chander, R. W. Hayes
Improving GPR image resolution in lossy ground using dispersive migration
As a compact wave packet travels through a dispersive medium, it becomes dilated and distorted. As a result, ground-penetrating radar (GPR) surveys over conductive and/or lossy soils often result in poor image resolution. A dispersive migration method is presented that combines an inverse dispersion filter with frequency-domain migration. The method requires a fully characterized GPR system includ
Authors
C.P. Oden, M.H. Powers, D.L. Wright, G.R. Olhoeft
Integrating observation and statistical forecasts over sub-Saharan Africa to support Famine Early Warning
Famine early warning in Africa presents unique challenges and rewards. Hydrologic extremes must be tracked and anticipated over complex and changing climate regimes. The successful anticipation and interpretation of hydrologic shocks can initiate effective government response, saving lives and softening the impacts of droughts and floods. While both monitoring and forecast technologies continue to
Authors
Chris Funk, James P. Verdin, Gregory Husak
Investigators share improved understanding of the North American carbon cycle
[No abstract available]
Authors
R.A. Birdsey, R. Cook, S. Denning, P. Griffith, B. Law, J. Masek, A. Michalak, S. Ogle, D. Ojima, Y. Pan, C. Sabine, E. Sheffner, E. Sundquist
Juvenile blue crab abundances in natural and man-made tidal channels in mangrove habitat, Tampa Bay, Florida (USA)
[No abstract available]
Authors
L.A. Yeager, J.M. Krebs, C.C. McIvor, A.B. Brame
Keeping pace with Capitol Hill
At the Capitol Hill, the legislative branch of the United States government, the work is always at pace. Working with Congress is a tough job yet, rewarding. The Congress worked hard together to serve the public interest but many big issues are one small part of what Congress does. However, many US news media do not report what the government does instead, the media report what the government argu
Authors
C. Cooper
Large-scale causes of variation in the serpentine vegetation of California
Serpentine vegetation in California ranges from forest to shrubland and grassland, harbors many rare and endemic species, and is only moderately altered by invasive exotic species at the present time. To better understand the factors regulating the distribution of common/representative species, endemic/rare species, and the threat of exotics in this important flora, we analyzed broad-scale communi
Authors
J.B. Grace, H.D. Safford, S. Harrison