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.
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Amplitude versus offset modeling of the bottom simulating reflection associated with submarine gas hydrates Amplitude versus offset modeling of the bottom simulating reflection associated with submarine gas hydrates
A bottom simulating seismic reflection (BSR) that parallels the sea floor occurs worldwide on seismic profiles from outer continental margins. The BSR coincides with the base of the gas hydrate stability field and is commonly used as indicator of natural submarine gas hydrates. Despite the widespread assumption that the BSR marks the base of gas hydrate-bearing sediments, the occurrence...
Authors
K. Andreassen, P. E. Hart, M. MacKay
An experimental design for examining the influence on environmental factors on downstream migratory behavior An experimental design for examining the influence on environmental factors on downstream migratory behavior
No abstract available at this time
Authors
G.P. Barbin, S. D. McCormick, A.J. Haro
An on-line diagnostic wind model applied to the San Francisco Bay region An on-line diagnostic wind model applied to the San Francisco Bay region
No abstract available.
Authors
R. T. Cheng, J. Feinstein, F. Ludwig, D. M. Sinton
Automated, reproducible delineation of zones at risk from inundation by large volcanic debris flows Automated, reproducible delineation of zones at risk from inundation by large volcanic debris flows
Large debris flows can pose hazards to people and property downstream from volcanoes. We have developed a rapid, reproducible, objective, and inexpensive method to delineate distal debris-flow hazard zones. Our method employs the results of scaling and statistical analyses of the geometry of volcanic debris flows (lahars) to predict inundated valley cross-sectional areas (A) and...
Authors
Steve P. Schilling, Richard M. Iverson
Characterisation of physical environmental factors on an intertidal sandflat, Manukau Harbour, New Zealand Characterisation of physical environmental factors on an intertidal sandflat, Manukau Harbour, New Zealand
Physical environmental factors, including sediment characteristics, inundation time, tidal currents and wind waves, likely to influence the structure of the benthic community at meso-scales (1-100 m) were characterised for a sandflat off Wiroa Island (Manukau Harbour, New Zealand). In a 500 x 250 m study site, sediment characteristics and bed topography were mostly homogenous apart from...
Authors
R.G. Bell, T.M. Hume, T.J. Dolphin, M.O. Green, R. A. Walters
Cometabolic biodegradation of trichloroethylene in microcosms Cometabolic biodegradation of trichloroethylene in microcosms
Laboratory microcosms were used to determine the concentrations of oxygen (O2) and methane (CH4) that optimize trichloroethylene (TCE) biodegradation in sediment and ground-water samples from a TCE-contaminated aquifer at Picatinny Arsenal, Morris County, New Jersey. The mechanism for degradation is the cometabolic activity of methanotrophic bacteria. The laboratory data will be used to...
Authors
Allen C. Kane, Timothy P. Wilson, Jeffrey M. Fischer
Coordination and standardization of federal sedimentation activities Coordination and standardization of federal sedimentation activities
In August 1964, the Bureau of the Budget issued Circular A-67 to set forth guidelines for the coordination of water-data acquisition activities throughout the Federal government. The U.S. Department of the Interior was assigned the task of implementing Circular A-67, which in turn redelegated this responsibility to the U.S. Geological Survey (USGS). Delegation of the lead responsibility...
Authors
G. Douglas Glysson, John R. Gray
Debris-flow hazard map units from gridded probabilities Debris-flow hazard map units from gridded probabilities
The common statistical practice of dividing a range of probabilities into equal probability intervals may not result in useful landslide-hazard map units for areas populated by equal-area cells, each of which has a unique probability. Most hazard map areas contain very large numbers of cells having low probability of failure, and as probability increases, the number of cells decreases in...
Authors
Russell H. Campbell, Richard L. Bernknopf
Debris-flow initiation experiments using diverse hydrologic triggers Debris-flow initiation experiments using diverse hydrologic triggers
Controlled debris-flow initiation experiments focused on three hydrologic conditions that can trigger slope failure: localized ground-water inflow; prolonged moderate-intensity rainfall; and high-intensity rainfall. Detailed monitoring of slope hydrology and deformation provided exceptionally complete data on conditions preceding and accompanying slope failure and debris-flow...
Authors
Mark E. Reid, Richard G. LaHusen, Richard M. Iverson
Decadal variability of precipitation over western North America Decadal variability of precipitation over western North America
No abstract available.
Authors
D.R. Cayan, M. D. Dettinger, H.F Diaz, N. Graham
Delineating and monitoring habitat management units in a temperate deep-water marine protected area Delineating and monitoring habitat management units in a temperate deep-water marine protected area
No abstract available.
Authors
P.J. Auster, C. Michalopoulos, Page C. Valentine, R.J. Malatesta
Development of anesthetics for the mussel Elliptio complanata Development of anesthetics for the mussel Elliptio complanata
No abstract available at this time
Authors
W.A. Lellis, T.A. Plerhoples