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.
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.
Filter Total Items: 5599
Identifying limits on aquatic insect density exposed to metals in the presence of co-limiting factors Identifying limits on aquatic insect density exposed to metals in the presence of co-limiting factors
No abstract available.
Authors
Travis S. Schmidt, W.H. Clements, Brian S. Cade
Predicting climate change impacts on Great Basin wetlands, migratory birds, and their prey: workshop Predicting climate change impacts on Great Basin wetlands, migratory birds, and their prey: workshop
No abstract available.
Authors
S. M. Haig, J. Matthews, M.P. Miller, Travis S. Schmidt, D.D. Roby, Collin A. Eagles-Smith, S.P. Murphy
Migratory structure and geographic origins of hoary bats (Lasiurus cinereus) inferred from stable isotope analysis Migratory structure and geographic origins of hoary bats (Lasiurus cinereus) inferred from stable isotope analysis
No abstract available.
Authors
Paul M. Cryan, Craig A. Stricker, Mike B. Wunder
Evidence of mating readiness in certain bats killed by wind turbines Evidence of mating readiness in certain bats killed by wind turbines
Bats consistently die at wind turbines during late-summer and autumn. Migratory, tree-roosting species show increased susceptibility compared to other bats, yet the exact causes remain unknown. A hypothesized cause with strong conservation implications is that migratory tree bats die at turbines while seeking mates around tall tree like structures. In this pilot study we histologically...
Authors
Paul M. Cryan, Joel W. Jameson, Erin F. Baerwald, Craig K. R. Willis, Robert M.R. Barclay, Elise A. Snider, Elizabeth G. Crichton
Laboratory simulated transport of microcystin-LR and cylindrospermopsin in groundwater under the influence of stormwater ponds: implications for harvesting of infiltrated stormwater Laboratory simulated transport of microcystin-LR and cylindrospermopsin in groundwater under the influence of stormwater ponds: implications for harvesting of infiltrated stormwater
Water shortages in the southeastern United States have led to a need for more intensive management and usage of stormwater for beneficial uses such as irrigation. Harvesting of infiltrated stormwater from horizontal wells in sandy aquifer sediments beneath stormwater ponds has emerged as an alternative in need of evaluation. Cyanobacteria may proliferate in stormwater ponds; cyanotoxins...
Authors
Andrew M. O’Reilly, Martin P. Wanielista, Keith A. Loftin, Ni-Bin Chang
A comparison between SWI and SEAWAT: the importance of dispersion, inversion and vertical anisotropy A comparison between SWI and SEAWAT: the importance of dispersion, inversion and vertical anisotropy
SWI and SEAWAT are both computer codes designed to model variable-density systems. One of the options in SWI is to model Dupuit interface flow, where freshwater and seawater are separated by an interface. In this paper we compare seawater intrusion model results of SWI to model results of SEAWAT, which simulates full variable-density flow and transport. Results indicate that SWI is valid...
Authors
Alyssa M. Dausman, Christian D. Langevin, Mark Bakker, Frans Schaars
A practitioner's tool for assessing glide crack activity A practitioner's tool for assessing glide crack activity
Glide cracks can result in full-depth glide avalanche release. Avalanches from glide cracks are notoriously difficult to forecast, but are a reoccurring problem in a number of different avalanche forecasting programs across a range of snow climates. Despite this, there is no consensus for how to best manage, mitigate, or even observe glide cracks and the potential resultant avalanche...
Authors
Jordy Hendrikx, Erich H. Peitzsch, Daniel B. Fagre
A versatile suite of laboratory-nonspecific software for processing sediment grain-size data A versatile suite of laboratory-nonspecific software for processing sediment grain-size data
No abstract available.
Authors
Lawrence J. Poppe, Andrew H. Eliason, Katherine Y. McMullen
Analysis of current-use pesticides in aquatic and terrestrial organisms collected throughout California, USA Analysis of current-use pesticides in aquatic and terrestrial organisms collected throughout California, USA
A wide variety of pesticides are applied concurrently in agricultural and urban areas and transported off site dissolved in water and bound to sediments. But the exposure of aquatic and terrestrial organisms to current-use pesticides and the resulting effects are not well understood. One approach is to directly analyze tissue concentrations of contaminants. The overall objective of this...
Authors
Kelly L. Smalling, Kathyrn M. Kuivila
Anomalously low strength of serpentinite sheared against granite and implications for creep on the Hayward and Calaveras Faults Anomalously low strength of serpentinite sheared against granite and implications for creep on the Hayward and Calaveras Faults
Serpentinized ophiolitic rocks are juxtaposed against quartzofeldspathic rocks at depth across considerable portions of the Hayward and Calaveras Faults. The marked compositional contrast between these rock types may contribute to fault creep that has been observed along these faults. To investigate this possibility, we are conducting hydrothermal shearing experiments to look for changes...
Authors
Diane E. Moore, David A. Lockner, David A. Ponce
Application of the control volume mixed finite element method to a triangular discretization Application of the control volume mixed finite element method to a triangular discretization
A control volume mixed finite element scheme for a triangular discretization of a 2-D domain is presented; several control-volume scenarios for use with the scheme are explored.
Authors
R.L. Naff
Archiving strategy for USGS EROS center and our future direction Archiving strategy for USGS EROS center and our future direction
The U. S. Geological Survey's Earth Resources Observation and Science Center has the responsibility to acquire, manage, and preserve our Nation's land observations. These records are obtained primarily from airplanes and satellites dating back to the 1930s. The ability to compare landscapes from the past with current information enables change analysis at local and global scales. With...
Authors
John Faundeen