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.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Continuous measurement of suspended-sediment discharge in rivers by use of optical backscatterance sensors Continuous measurement of suspended-sediment discharge in rivers by use of optical backscatterance sensors
Optical sensors have been used to measure turbidity and suspended-sediment concentration by many marine and estuarine studies, and optical sensors can provide automated, continuous time series of suspended-sediment concentration and discharge in rivers. Three potential problems with using optical sensors are biological fouling, particle-size variability, and particle-reflectivity...
Authors
D. H. Schoellhamer, S.A. Wright
Coupled heat and fluid flow modeling of the Carboniferous Kuna Basin, Alaska: Implications for the genesis of the Red Dog Pb-Zn-Ag-Ba ore district Coupled heat and fluid flow modeling of the Carboniferous Kuna Basin, Alaska: Implications for the genesis of the Red Dog Pb-Zn-Ag-Ba ore district
The Red Dog deposit is a giant 175 Mton (16% Zn, 5% Pb), shale-hosted Pb-Zn-Ag-Ba ore district situated in the Carboniferous Kuna Basin, Western Brooks Range, Alaska. These SEDEX-type ores are thought to have formed in calcareous turbidites and black mudstone at elevated sub-seafloor temperatures (120-150??C) within a hydrogeologic framework of submarine convection that was structurally...
Authors
G. Garven, Jeff P. Raffensperger, Julie A. Dumoulin, D.A. Bradley, L. E. Young, K.D. Kelley, D. L. Leach
Data specifications for the Landsat Data Continuity Mission Data specifications for the Landsat Data Continuity Mission
The National Aeronautics and Space Administration (NASA) plans to procure data from a privately-owned and commercially-operated remote sensing system for the next Landsat Mission, the Landsat Data Continuity Mission (LDCM).Data requirements are documented in an LDCM Data Specification. The specifications require delivery of data covering 250 Landsat scenes on a daily basis. The data are...
Authors
J. R. Irons, N.J. Speciale, McCuistion J. Douglas, J. G. Masek, B. L. Markham, James C. Storey, D. E. Lencioni, R. E. Ryan
Debris-flow deposits and watershed erosion rates near southern Death Valley, CA, United States Debris-flow deposits and watershed erosion rates near southern Death Valley, CA, United States
No abstract available.
Authors
K. M. Schmidt, C.M. Menges
Debris-flow initiation from large, slow-moving landslides Debris-flow initiation from large, slow-moving landslides
In some mountainous terrain, debris flows preferentially initiate from the toes and margins of larger, deeper, slower-moving landslides. During the wet winter of 1997, we began real-time monitoring of the large, active Cleveland Corral landslide complex in California, USA. When the main slide is actively moving, small, shallow, first-time slides on the toe and margins mobilize into...
Authors
M.E. Reid, D.L. Brien, R.G. LaHusen, J. J. Roering, J. de la Fuente, S. D. Ellen
Desalinization, erosion, and tidal changes following the breaching of Napa salt pond 3 Desalinization, erosion, and tidal changes following the breaching of Napa salt pond 3
No abstract available.
Authors
K. M. Swanson, G.G. Shellenbarger, D. H. Schoellhamer, N. K. Ganju, N.D. Athearn, P.A. Buchanan
Detecting denning polar bears with forward looking infra-red imagery (FLIR) Detecting denning polar bears with forward looking infra-red imagery (FLIR)
Polar bears give birth in snow dens in mid winter, and remain in dens until early spring. Survival and development of neonates is dependent on the stable environment within the maternal den. Petroleum related activities currently span approximately 200 km of the Alaskan Beaufort Sea coastal area. New and proposed developments are expected to dramatically expand the area influenced by...
Authors
Steven C. Amstrup, Geoff Weston-York, T. L. McDonald, R. Neilsen, Kristin S. Simac, George M. Durner
Development of a ShakeMap-based, earthquake response system within caltrans Development of a ShakeMap-based, earthquake response system within caltrans
The development of a shakemap-based earthquake response system within Caltrans is discussed. Caltrans is test deploying a simplified protocol for its direct use for post-earthquake prioritization of bridge inspection. The process involves employing a GIS spatial analysis to identify the bridges that were most strongly shaken.
Authors
D.J. Wald, P.A. Naecker, C. Roblee, Loren Turner
Earthquake occurrence modeling for evaluating seismic risks to roadway systems Earthquake occurrence modeling for evaluating seismic risks to roadway systems
The results of the application of a variety of techniques, which included bootstrap sampling, the use of antithetic values, the use of Latin squares sampling, use of control functions, a compound Poisson approach, and importance sampling, were presented. It was found that extremely large reductions in the number of simulations needed could be achieved for the mean and confidence limits...
Authors
D. Perkins, C. Taylor
Ecology of Tamarix ramosissima in western North America and Central Asia Ecology of Tamarix ramosissima in western North America and Central Asia
No abstract available.
Authors
P.B. Shafroth
Effects of ammonium perchlorate on the reproductive performance and thyroid follicle histology of zebrafish Effects of ammonium perchlorate on the reproductive performance and thyroid follicle histology of zebrafish
Adult zebrafish were reared up to eight weeks in control water or in water containing ammonium perchlorate (AP) at measured perchlorate concentrations of 18 (environmentally relevant, high) and 677 ppm. Groups of eight females were paired with four males on a weekly basis to assess AP effects on spawned egg volume, an index of reproductive performance. All treatments were applied to four...
Authors
R. Patino, M. R. Wainscott, E. I. Cruz-Li, S. Balakrishnan, C. McMurry, V. S. Blazer, T.A. Anderson
Effects of contaminants on soil ecosystem structure and function Effects of contaminants on soil ecosystem structure and function
No abstract available.
Authors
R.S. Wentsel, W. N. Beyer, C.A. Edwards, L.A. Kapustka, R.G. Kuperman