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.
Filter Total Items: 5547
Estimating losses to predation of recently released American shad larvae in the Susquehanna River basin Estimating losses to predation of recently released American shad larvae in the Susquehanna River basin
No abstract available at this time
Authors
J. H. Johnson
Estimation of recharge by the U.S. Geological Survey Estimation of recharge by the U.S. Geological Survey
No abstract available
Authors
G.E. Groschen
Estimation of water-filled and air-filled porosity in the unsaturated zone, Yucca Mountain, Nevada Estimation of water-filled and air-filled porosity in the unsaturated zone, Yucca Mountain, Nevada
The responses of density and dielectric logs are formulated in terms if the matrix properties, air-filled porosity and water-filled porosity. Porosity values obtained from logs from borehole USW G-2 are in reasonable agreement with estimates from core determinations.
Authors
Philip H. Nelson
Evaluation of acid mine drainage with the rapid bioassessment protocol Evaluation of acid mine drainage with the rapid bioassessment protocol
No abstract available at this time
Authors
A. Hendricks, M. Miller, C. Snyder
Evaluation of historical scour at selected stream crossings in Indian Evaluation of historical scour at selected stream crossings in Indian
Geophysical data were collected by means of ground-penetrating radar and tuned transducer systems to estimate the historical scour at ten bridges in Indiana. These geophysical data were used to compare and evaluate the results of 13 published pier-scour equations. In order to make this comparison, it was assumed that the measured historical scour was associated with the peak historical...
Authors
David S. Mueller, Robert L. Miller
Evaluation of the extent of contaminated sediments in the west branch of the Grand Calumet river, Indiana-Illinois, USA Evaluation of the extent of contaminated sediments in the west branch of the Grand Calumet river, Indiana-Illinois, USA
The extent of contamination in river sediments is often not rigorously evaluated. In many cases, only surface sediment samples are taken. In other cases, entire sediment cores are composited for analysis, an approach that limits the ability to identify discrete zones of contamination. In addition, few studies include information on the rate of sedimentation. Composited sediment cores...
Authors
R.A. Cahill, M.T. Unger
Evidence for development of resistance to bacterial gill disease in cultured rainbow trout Evidence for development of resistance to bacterial gill disease in cultured rainbow trout
No abstract available at this time.
Authors
J. Heinen, J. Hankins, A. Noble, G. Bullock, R. Herman, A. Weber
Finite-difference model for 3-D flow in bays and estuaries Finite-difference model for 3-D flow in bays and estuaries
This paper describes a semi-implicit finite-difference model for the numerical solution of three-dimensional flow in bays and estuaries. The model treats the gravity wave and vertical diffusion terms in the governing equations implicitly, and other terms explicitly. The model achieves essentially second-order accurate and stable solutions in strongly nonlinear problems by using a three...
Authors
Peter E. Smith, Bruce E. Larock
Flood elevation limits in the rocky mountains Flood elevation limits in the rocky mountains
An analysis of 77,987 station-years of streamflow-gaging station data from 3,748 stations in the Rocky Mountains indicates that there is a latitude-dependent elevation limit to substantial rainfall-produced flooding. The elevation limit ranges from about 1,650 m in Montana to about 2,350 m in New Mexico. Above this elevation limit, large rainfall-produced floods occur very infrequently...
Authors
Robert D. Jarrett
Fluid-inclusion evidence for previous higher temperatures in the SUNEDCO 58-28 drill hole near Breitenbush hot springs, Oregon Fluid-inclusion evidence for previous higher temperatures in the SUNEDCO 58-28 drill hole near Breitenbush hot springs, Oregon
The SUNEDCO 58-28 geothermal exploration drill hole was completed in 1981 to a depth of 2, 457 m near Breitenbush Hot Springs in the Western Cascade Mountains of northern Oregon. One hundred thirteen liquid-rich fluid inclusions (mostly secondary) were analyzed from drill cuttings samples of hydrothermal quartz, calcite, and anhydrite, as well as primary quartz phenocrysts. Except for...
Authors
Keith E. Bargar
Freshwater mussels of the Chattahoochee and Flint rivers Freshwater mussels of the Chattahoochee and Flint rivers
No abstract available.
Authors
J.D. Williams, J. Brim-Box
Friction in debris flows: inferences from large-scale flume experiments Friction in debris flows: inferences from large-scale flume experiments
A recently constructed flume, 95 m long and 2 m wide, permits systematic experimentation with unsteady, nonuniform flows of poorly sorted geological debris. Preliminary experiments with water-saturated mixtures of sand and gravel show that they flow in a manner consistent with Coulomb frictional behavior. The Coulomb flow model of Savage and Hutter (1989, 1991), modified to include quasi...
Authors
Richard M. Iverson, Richard G. LaHusen