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Page 3710, results 92726 - 92750

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Phytoplankton bloom dynamics in coastal ecosystems: A review with some general lessons from sustained investigation of San Francisco Bay, California
James E. Cloern
1996, Reviews of Geophysics (34) 127-168
Phytoplankton blooms are prominent features of biological variability in shallow coastal ecosystems such as estuaries, lagoons, bays, and tidal rivers. Long-term observation and research in San Francisco Bay illustrates some patterns of phytoplankton spatial and temporal variability and the underlying mechanisms of this variability. Blooms are events of rapid production...
A watershed-scale approach to tracing metal contamination in the environment
Stanley E Church
1996, Conference Paper
IntroductionPublic policy during the 1800's encouraged mining in the western United States. Mining on Federal lands played an important role in the growing economy creating national wealth from our abundant and diverse mineral resource base. The common industrial practice from the early days of mining through about 1970 in the...
The effect of phorate on wetland macroinvertebrates
Charles D. Dieter, Lester D. Flake, Walter G. Duffy
1996, Environmental Toxicology (15) 308-312
The effects of phorate, an organophosphorus insecticide, on aquatic macroinvertebrates was studied in littoral mesocosms in South Dakota wetlands. In 1991 and 1992, four mesocosms were constructed in each of three wetlands. In each wetland, one mesocosm was a reference and phorate concentrations of 1.2, 2.4, and 4.8 kg/ha were...
Water-quality, streamflow, and meteorological data for the Tualatin River Basin, Oregon, 1991-93
M. C. Doyle, J. M. Caldwell
1996, Open-File Report 96-173
Surface-water-quality data, ground-water-quality data, streamflow data, field measurements, aquatic-biology data, meteorological data, and quality-assurance data were collected in the Tualatin River Basin from 1991 to 1993 by the U.S. Geological Survey (USGS) and the Unified Sewerage Agency of Washington County, Oregon (USA). The data from that study, which are part...
Water-surface profile and flood boundaries for the computed 100-year flood, Big Muddy Creek, Fort Peck Indian Reservation and adjacent area, Montana
R. J. Omang
1996, Water-Resources Investigations Report 95-4291
Hydrologic and hydraulic evaluations of Big Muddy Creek were made to determine the magnitude of the 100-year flood and the extent of flooding that would occur as the result of this flood. The magnitude of the 100-year flood was determined to range from 13,600 to 20,400 ft3/s, depending on location....
Circulation and effluent dilution modeling in Massachusetts Bay : model implementation, verification and results
Richard P. Signell, Harry L. Jenter, Alan F. Blumberg
1996, Open-File Report 96-15
A three-dimensional hydrodynamic model was developed as part of a cooperative U.S. Geological Survey/Massachusetts Water Resources Authority program to study contaminated sediment accumulation and transport in Massachusetts Bay. This report details the development of the model and assesses how well the model represents observed currents and water properties in the...
Geohydrology of the Weldon Spring ordnance works, St. Charles County, Missouri
Douglas N. Mugel
1996, Water-Resources Investigations Report 96-4171
Bedrock units at the Weldon Spring ordnance works in St. Charles County, Missouri, dip to the northeast at about 60 feet per mile, as measured by the top of the Chouteau Group. The top of the bedrock forms a generally east-west trending ridge through the Weldon Spring training area and...
Site-response maps for the Los Angeles region based on earthquake ground motions
Stephen H. Hartzell, Stephen C. Harmsen, Arthur D. Frankel, David L. Carver, Edward Cranswick, Mark E. Meremonte, John A. Michael
1996, Open-File Report 96-723
Ground-motion records from aftershocks of the 1994 Northridge earthquake and main-shock records from the 1971 San Fernando, 1987 Whittier Narrows, 1991 Sierra Madre, and 1994 Northridge earthquakes are used to estimate site response in the urban Los Angeles, California, area. Two frequency bands are considered, 0.5-1.5 Hz and 2.0-6.0 Hz....
Preliminary investigations of the distribution and resources of coal in the Kaiparowits Plateau, southern Utah
R. D. Hettinger, L. N. R. Roberts, L. R. H. Biewick, M.A. Kirschbaum
1996, Open-File Report 96-539
This report on the coal resources of the Kaiparowits Plateau, Utah is a contribution to the U.S. Geological Survey’s (USGS) “National Coal Resource Assessment” (NCRA), a five year effort to identify and characterize the coal beds and coal zones that could potentially provide the fuel for the Nation’s coal-derived energy...
Progress report on daily flow-routing simulation for the Carson River, California and Nevada
G. W. Hess
1996, Open-File Report 96-211
A physically based flow-routing model using Hydrological Simulation Program-FORTRAN (HSPF) was constructed for modeling streamflow in the Carson River at daily time intervals as part of the Truckee-Carson Program of the U.S. Geological Survey (USGS). Daily streamflow data for water years 1978-92 for the mainstem river, tributaries, and irrigation ditches...