Conference Papers
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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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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 debris flows an
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
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)
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 petroleum act
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
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
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 of the cond
Authors
D. Perkins, C. Taylor
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
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 to five s
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
No abstract available.
Authors
R.S. Wentsel, W. N. Beyer, C.A. Edwards, L.A. Kapustka, R.G. Kuperman
Effects of lampricide exposure on the survival, growth, and behavior of the unionid mussels Elliptio complanata and Pyganadon cataracta
The effects of a 12-h exposure to the lampricide 3-trifluoromethyl-4- nitrophenol (TFM) and a combination of TFM and 1% niclosamide (active ingredient in Bayluscide 70% wettable powder) on the short and long-term (10 mo post exposure) survival and behavior of two unionid freshwater mussel species Elliptio complanata and Pyganadon cataracta were measured. Growth of juvenile E. complanata mussels 10
Authors
D. L. Waller, T.D. Bills, M.A. Boogaard, D.A. Johnson, T.C.J. Doolittle
Effects of organic amendments on the toxicity and bioavailability of cadmium and copper in spiked formulated sediments
We evaluated the partitioning and toxicity of cadmium (Cd) and copper (Cu) spiked into formulated sediments containing two types of organic matter (OM), i.e., cellulose and humus. Amendments of cellulose up to 12.5% total organic carbon (TOC) did not affect partitioning of Cd or Cu between sediment and pore water and did not significantly affect the toxicity of spiked sediments in acute toxicity t
Authors
J.M. Besser, W. G. Brumbaugh, T.W. May, C.G. Ingersoll
Endangered toads in the Rockies
The western toad species complex, endemic to western North America, includes two montane species that have undergone extensive declines. These are the Yosemite toad, Bufo canorus, in the Sierra Nevada, and the southern Rocky Mountain populations of the boreal toad, B. borea. Most declines in the Rockies appear to have occurred before 1980, but a recent episode in Rocky Mountain National Park illus
Authors
Paul Stephen Corn
Enlisting the support of land-use planners to reduce debris-flow hazards in the United States
Land-use planners have an important role in reducing losses from debris-flow hazards. For that reason, the U.S. Geological Survey (USGS) and the American Planning Association (APA) have developed a strategy to make information about landslide and debris-flow hazards available to local planners so that they can incorporate this information into the planning process. A guidebook for planners and act
Authors
P. L. Gori, S.P. Jeer, L.M. Highland