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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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
General implicit representation of hydraulic structures in numerical flow models General implicit representation of hydraulic structures in numerical flow models
Effects of hydraulic structures (such as culverts, bridge openings, or gates) can be simulated in numerical surface-water-flow models. Generally the scale and dimension of the numerical model is insufficient to model flow through the structure directly. However, if for a particular hydraulic structure a unique relation exists among headwater elevation, tailwater elevation, and discharge...
Authors
L. L. DeLong, J.M. Fulford
General implicit representation of hydraulic structures in numerical flow models General implicit representation of hydraulic structures in numerical flow models
No abstract available
Authors
L. L. DeLong, J.M. Fulford
Generalized statistical model of the Edwards Aquifer Generalized statistical model of the Edwards Aquifer
No abstract available
Authors
W.H. Asquith, M.E. Jennings
Genetic responses of Isonychia bicolor (Ephemeroptera:Oligoneuriidae) to chronic mercury pollution Genetic responses of Isonychia bicolor (Ephemeroptera:Oligoneuriidae) to chronic mercury pollution
No abstract available at this time
Authors
C.D. Snyder, A.C. Hendricks
Geologic assessments and characterization of marine sand resources - Gulf of Mexico region Geologic assessments and characterization of marine sand resources - Gulf of Mexico region
The U.S. Geological Survey conducts geologic surveys and research in marine areas of the United States and its territories and possessions. An objective in some of the investigations is locating and evaluating marine sand and gravel resources and interpretation of the origins of the sand body deposits. Results from such studies over the past 30 years show that many extremely large...
Authors
S. Jeffress Williams, Helana A. Cichon