Conference Papers
Science Quality and Integrity
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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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Use of electronic microprocessor-based instrumentation by the U.S. geological survey for hydrologic data collection Use of electronic microprocessor-based instrumentation by the U.S. geological survey for hydrologic data collection
The U.S. Geological Survey is acquiring a new generation of field computers and communications software to support hydrologic data-collection at field locations. The new computer hardware and software mark the beginning of the Survey's transition from the use of electromechanical devices and paper tapes to electronic microprocessor-based instrumentation. Software is being developed for...
Authors
William G. Shope
Use of sediment-trace element geochemical models for the identification of local fluvial baseline concentrations Use of sediment-trace element geochemical models for the identification of local fluvial baseline concentrations
Studies have demonstrated the utility of fluvial bed sediment chemical data in assesing local water-quality conditions. However, establishing local background trace element levels can be difficult. Reference to published average concentrations or the use of dated cores are often of little use in small areas of diverse local petrology, geology, land use, or hydrology. An alternative...
Authors
A. J. Horowitz, K. A. Elrick, C. R. Demas, D.K. Demcheck
Use of stable isotopes, tritium, soluble salts, and redox-sensitive elements to distinguish ground water from irrigation water in the Salton Sea basin Use of stable isotopes, tritium, soluble salts, and redox-sensitive elements to distinguish ground water from irrigation water in the Salton Sea basin
Evaporative concentration of irrigation water diverted from the Colorado River to the Salton Sea basin for several decades has produced an overlying system (that includes drainwater and surface waters) whose composition is highly variable and differs from that of the shallow regional ground water beneath it. The role of hydrologic and geochemical processes in causing these differences...
Authors
Roy A. Schroeder, James G. Setmire, Jill N. Densmore
By
Variants of infectious hematopoietic necrosis virus selected with glycoprotein-specific monoclonal antibodies Variants of infectious hematopoietic necrosis virus selected with glycoprotein-specific monoclonal antibodies
No abstract available
Authors
K.W. Roberti, J. R. Winton, J. S. Rohovec
Vertical structure of cross-shore currents from wind-induced setup Vertical structure of cross-shore currents from wind-induced setup
Most of the storm surge models presented in the literature are vertically averaged and calculate only the sea-surface elevation and mean flow. Whereas these models may be adequate for predicting storm surge heights for flooding purposes, they neglect the vertical structure of the flow and the boundary shear stress, which are both critical for predicting cross-shore sediment transport...
Authors
Guy Gelfenbaum
Volcanic episodes near Yucca Mountain as determined by paleomagnetic studies at Lathrop Wells, Crater Flat, and Sleeping Butte, Nevada Volcanic episodes near Yucca Mountain as determined by paleomagnetic studies at Lathrop Wells, Crater Flat, and Sleeping Butte, Nevada
It has been suggested that mafic volcanism in the vicinity of Yucca Mountain, Nev., is both recent (20 ka) and a product of complex 'polycyclic' eruptions. This pattern of volcanism, as interpreted by some workers at the Lathrop Wells volcanic complex, comprises a sequence of numerous small-volume eruptions that become more tephra-producing over time. Such sequences are thought to occur...
Authors
Duane E. Champion
Wind generated wave resuspension of sediment in Old Tampa Bay, Florida Wind generated wave resuspension of sediment in Old Tampa Bay, Florida
Vertical profiles of velocity and suspended-solids concentration were measured at a scientific instrumentation platform in Old Tampa Bay during the passage of a cold front in March 1990. Strong sustained winds behind the front increased wave activity in the bay, which resulted in resuspension of bottom sediments. The concentration of suspended solids, however, did not correlate with...
Authors
David H. Schoellhamer, Victor A. Levesque
Complex interactions among light-reducing variables in seagrass systems: Simulation model predictions for long-term community stability Complex interactions among light-reducing variables in seagrass systems: Simulation model predictions for long-term community stability
No abstract available.
Authors
Hilary A. Neckles
Prevalence and characteristics of plastic ingested by Hawaiian seabirds Prevalence and characteristics of plastic ingested by Hawaiian seabirds
The prevalence of plastic in 18 species of seabirds at seven study sites in the Hawaiian Islands and Johnston Atoll was studied during 1986 and 1987. Stomach samples were collected by induced emesis from 1,803 live birds of 15 species and during necropsy of 277 dead birds of 5 species. The prevalence of ingested plastic varied greatly among species; age, year of collection, and location...
Authors
Louis Sileo, Paul Sievert, Michael D. Samuel, Stewart I. Fefer
Morphology and stratigraphic significance of the marine araphid diatom Lancineis, gen. nov Morphology and stratigraphic significance of the marine araphid diatom Lancineis, gen. nov
No abstract available.
Authors
George W. Andrews
Wetland and wildlife management in the Gulf of Mexico region Wetland and wildlife management in the Gulf of Mexico region
No abstract available.
Authors
James B. Johnston
Nutritional management of captive wildlife Nutritional management of captive wildlife
No abstract available.
Authors
F. Joshua Dein