Spatial and temporal trends of contaminants in eggs of wading birds from San Francisco Bay, California
R. L. Hothem, Katherine C. Marois, S.E. Wainwright, D.L. Roster, Kirk A. King, T.J. Keldsen
1995, Environmental Toxicology and Chemistry (14) 1319-1331
Between 1989 and 1991, reproduction by black-crowned night-herons (Nycticorax nycticorax) and snowy egrets (Egretta thula) was studied at sites in San Francisco Bay. Eggs were collected from these and other bay sites and from South Wilbur Flood Area, a reference site in California's San Joaquin Valley. Eggs were analyzed for...
Smallmouth bass in the Horseshoe Bend Reach of the San Joaquin River: Limiting factors and bioenergetic modeling
A. Houck, B. Kaufman, J. Petersen
1995, Report
No abstract available...
Distribution of phytobenthos in the Yakima River basin, Washington, in relation to geology, land use, and other environmental factors
Harry V. Leland
1995, Canadian Journal of Fisheries and Aquatic Sciences (52) 1108-1129
Benthic-algal distributions in the Yakima River, Washington, basin were, examined in relation to geology, land use, water chemistry, and stream habitat using indicator-species classification (TWINSPAN) and canonical correspondence analysis (CCA). Algal assemblages identified byTWINSPAN were each associated with a narrow range of water-quality conditions. In the Cascade geologic province,...
Viral hemorrhagic septicemia virus in North America
Theodore R. Meyers, James R. Winton
1995, Annual Review of Fish Diseases (5) 3-24
The first detections of viral hemorrhagic septicemia virus (VHSV) in North America were in Washington State from adult coho (Oncorhynchus kisutch) and chinook (O. tshawytscha) salmon in 1988. Subsequently, VHSV was isolated from adult coho salmon returning to hatcheries in the Pacific Northwest in 1989, 1991 and 1994. These isolates...
Developmental instability as a biomonitor of environmental stress: an illustration using aquatic vegetation
M. Tracy, D.C. Freeman, J.M. Emlen, J.H. Graham, R. A. Hough
1995, Book chapter, Biomonitors and biomarkers as indicators of environmental change
No abstract available...
Genetic variation and evolution of satellite viruses and satellite RNAs
G. Kurath, C. Robaglia
A. Gibbs, C. Calisher, F. Garcia-Arenal, editor(s)
1995, Book chapter, Molecular basis of virus evolution
No abstract available...
Channel degradation in southeastern Nebraska Rivers
Kenneth L. Wahl, Linda S. Weiss
Ward Rim J., editor(s)
1995, Conference Paper, Watershed Management Symposium - Proceedings
Many stream channels in southeastern Nebraska were dredged and straightened during 1904-15. The resulting channels were both shorter and steeper than the original channels. Tests for time trends were conducted using the nonparametric Kendall tau test to see if the channels have responded to these changes. Tests were conducted on...
Computational scheme for the prediction of metal ion binding by a soil fulvic acid
J.A. Marinsky, M.M. Reddy, J.H. Ephraim, A.S. Mathuthu
1995, Analytica Chimica Acta (302) 309-322
The dissociation and metal ion binding properties of a soil fulvic acid have been characterized. Information thus gained was used to compensate for salt and site heterogeneity effects in metal ion complexation by the fulvic acid. An earlier computational scheme has been modified by incorporating an additional step which improves...
Measured and predicted velocity and longitudinal dispersion at steady and unsteady flow, Colorado River, Glen Canyon Dam to lake mead
J.B. Graf
1995, Water Resources Bulletin (31) 265-281
The effect of unsteadiness or dam releases on velocity and longitudinal dispersion of flow was evaluated by injecting a fluorescent dye into the Colorado River below Glen Canyon Dam and sampling for dye concentration at selected sites downstream. In Glen Canyon, average flow velocity through the study reach increased directly...
Discrete fracture modeling-ESF North Portal Area, Yucca Mountain Nevada
Lawrence O. Anna
Hughes Howard R., editor(s)
1995, Conference Paper, High Level Radioactive Waste Management - Proceedings of the Annual International Conference
Statistical parameters from three-dimensional fracture network and hydraulic parameters were developed to be used in site scale models. This approach utilizes geometric fracture models and assess their impact on flow characteristics and parameters. Laboratory and field-testing data will be integrated to calibrate the flow models and to determine sensitivities of...
Osmium and neodymium isotopic constraints on the temporal and spatial evolution of Siberian flood basalt sources
M.F. Horan, R.J. Walker, V.A. Fedorenko, G.K. Czamanske
1995, Geochimica et Cosmochimica Acta (59) 5159-5168
Picrites from the Gudchikhinsky suite, the oldest rocks examined, have ??Os of +5.3 to +6.1 and ??Nd of +3.7 to +4.0. The osmium and neodymium isotopic compositions of these rocks are similar to some modern ocean-island basalts (OIB), consistent with their derivation from an mantle plume. Picrites from the stratigraphically...
The stability of hydrogen ion and specific conductance in filtered wet-deposition samples stored at ambient temperatures
J.D. Gordon, L.J. Schroder, A. L. Morden-Moore, V.C. Bowersox
1995, Water, Air, & Soil Pollution (83) 299-313
Separate experiments by the U.S. Geological Survey (USGS) and the Illinois State Water Survey Central Analytical Laboratory (CAL) independently assessed the stability of hydrogen ion and specific conductance in filtered wet-deposition samples stored at ambient temperatures. The USGS experiment represented a test of sample stability under a diverse range of...
Stratigraphic and palaeoenvironmental summary of the south-east Georgia Embayment: a correlation of exploratory wells
L. J. Poppe, P. Popenoe, C. W. Poag, B.A. Swift
1995, Marine and Petroleum Geology (12) 677-690
A Continental Offshore Stratigraphic Test (COST) well and six exploratory wells have been drilled in the south-east Georgia embayment. The oldest rocks penetrated are weakly metamorphosed Lower Ordovician quartz arenites and Silurian shales and argillites in the Transco 1005-1 well and Upper Devonian argillites in the COST GE-1 well. The...
Optimization techniques for integrating spatial data
U.C. Herzfeld, D. F. Merriam
1995, Mathematical Geology (27) 559-588
Two optimization techniques ta predict a spatial variable from any number of related spatial variables are presented. The applicability of the two different methods for petroleum-resource assessment is tested in a mature oil province of the Midcontinent (USA). The information on petroleum productivity, usually not directly accessible, is related indirectly...
Fluid-inclusion evidence for past temperature fluctuations in the Kilauea East Rift Zone geothermal area, Hawaii
Keith E. Bargar, Terry E.C. Keith, Frank A. Trusdell
1995, Geothermics (24) 639-659
Heating and freezing data were obtained for fluid inclusions in hydrothermal quartz, calcite, and anhydrite from several depths in three scientific observation holes drilled along the lower East Rift Zone of Kilauea volcano, Hawaii. Compositions of the inclusion fluids range from dilute meteoric water to highly modified sea water concentrated...
Glacial morphology and depositional sequences of the Antarctic Continental Shelf
Uri S. ten Brink, Christopher Schneider
1995, Geology (23) 580-584
We propose a simple model for the unusual depositional sequences and morphology of the Antarctic continental shelf. Our model considers the regional stratal geometry and the reversed morphology of the Antarctic continental shelf to be principally the results of time-integrated effects of glacial...
Relation between stream-water quality and geohydrology during base-flow conditions, Roberts creek watershed, Clayton County, Iowa
Stephen J. Kalkhoff
1995, Water Resources Bulletin (31) 593-604
An investigation to determine the relation between stream water quality and geohydrology in the Roberts Creek watershed, Clayton County, Iowa, was conducted during selected base-flow periods in 1988-90. Discharge measurements were made and water samples collected for analyses of nutrients and selected herbicides in 19 subbasins along the main stem...
Fractals in petroleum geology and earth processes
Christopher C. Barton, Paul R. La Pointe, editor(s)
1995, Book
In this unique volume, renowned experts discuss the applications of fractals in petroleum research-offering an excellent introduction to the subject. Contributions cover a broad spectrum of applications from petroleum exploration to production. Papers also illustrate how fractal geometry can quantify the spatial heterogeneity of different aspects of geology and how...
Economics of mining law
K. R. Long
1995, Nonrenewable Resources (4) 74-83
Modern mining law, by facilitating socially and environmentally acceptable exploration, development, and production of mineral materials, helps secure the benefits of mineral production while minimizing environmental harm and accounting for increasing land-use competition. Mining investments are sunk costs, irreversibly tied to a particular mineral site, and require many years to...
Use of hydrologic budgets and hydrochemistry to determine ground-water and surface-water interactions for Rapid Creek, Western South Dakota
Mark T. Anderson
1995, Conference Paper, International Symposium on Groundwater Management - Proceedings
The study of ground-water and surface-water interactions often employs streamflow-gaging records and hydrologic budgets to determine ground-water seepage. Because ground-water seepage usually is computed as a residual in the hydrologic budget approach, all uncertainty of measurement and estimation of budget components is associated with the ground-water seepage. This uncertainty can...
Maastrichtian ammonites chiefly from the Prairie Bluff Chalk in Alabama and Mississippi
W. A. Cobban, W. J. Kennedy
1995, Journal of Paleontology (69)
The Prairie Bluff Chalk of Alabama and Mississippi yields a diverse ammonite fauna of Maastrichtian age. Twenty-eight species, of which three are new, are recorded herein: Pseudophyllites indra (Forbes, 1846), Hauericeras rembda (Forbes, 1846), Pachydiscus (Pachydiscus) maconensis n. sp., P. (P.) cf. gollevillensis (d'Orbigny, 1850), P. (P.) jacquoti (Seunes, 1890), P. (P.) <span...
Simulation models for conservative and nonconservative solute transport in streams
R.L. Runkel
1995, Effects of scale on interpretation and management of sediment and water quality. Proc. symposium, Boulder, 1995 (226) 153-159
Solute transport in streams is governed by a suite of hydrologic and chemical processes. Interactions between hydrologic processes and chemical reactions may be quantified through a combination of field-scale experimentation and simulation modeling. Two mathematical models that simulate conservative and nonconservative solute transport in streams are presented. A model for...
Effect of ground-water/surface-water interactions on nitrate concentrations in discharge from the South Platte River alluvial aquifer, Colorado
P.B. McMahon, J.K. Böhlke
1995, Conference Paper, International Symposium on Groundwater Management - Proceedings
Concentrations of dissolved nitrate in recharge-area water from a 200-km2 segment of the South Platte River alluvial aquifer near Greeley, Colorado, range from less than 0.1 to 58 mg/l as nitrogen, and the median concentration is 26 mg/l as nitrogen. Hydraulic-head data indicate that this nitrate-enriched ground water move toward...
Assessment of gully-control structures in the Rio Nutria watershed, Zuni reservation, New Mexico
Allen C. Gellis, Andres Cheama, Vanissa Laahty, Sheldon Lalio
1995, Water Resources Bulletin (31) 633-646
During the latter part of the 19th century and the early part of the 20th century, a major cycle of erosion, arroyo cutting, and gullying occurred in the southwestern United States. Since this erosion cycle began, many projects to control erosion, such as the Civilian Conservation Corps projects in the...
Hydrogen and oxygen isotopic compositions of waters from fumaroles at Kilauea summit, Hawaii
T. K. Hinkley, J. E. Quick, R. T. Gregory, T.M. Gerlach
1995, Bulletin of Volcanology (57) 44-51
Condensate samples were collected in 1992 from a high-temperature (300° C) fumarole on the floor of the Halemaumau Pit Crater at Kilauea. The emergence about two years earlier of such a hot fumarole was unprecedented at such a central location at Kilauea. The condensates have hydrogen and oxygen isotopic compositions...
