Application of a new model for groundwater age distributions: Modeling and isotopic analysis of artificial recharge in the Rialto-Colton basin, California
T.R. Ginn, L. Woolfenden
2002, Report - University of California Water Resources Center 15-17
A project for modeling and isotopic analysis of artificial recharge in the Rialto-Colton basin aquifer in California, is discussed. The Rialto-Colton aquifer has been divided into four primary and significant flowpaths following the general direction of groundwater flow from NW to SE. The introductory investigation include sophisticated chemical reaction modeling,...
Changes in population and agricultural land in conterminous United States counties, 1790 to 1997
Pamela J. Waisanen, Norman B. Bliss
2002, Global Biogeochemical Cycles (16) 84-1-84-19
We have developed a data set of changes in population and agricultural land for the conterminous United States at the county level, resulting in more spatial detail than in previously available compilations. The purpose was to provide data on the timing of land conversion as an input to dynamic models...
Seasonal changes in androgen levels in stream- and hatchery-reared Atlantic salmon parr and their relationship to smolting
J. M. Shrimpton, S. D. McCormick
2002, Journal of Fish Biology (61) 1294-1304
In stream-reared Atlantic salmon Salmo salar, plasma androgens were significantly greater in mature male parr than immature males and females in October, but had declined by January and did not differ significantly from immature fish throughout the spring. Immature fish in March were significantly larger and had greater gill Na+,K+-ATPase...
Electrofishing for crappies: Electrical settings influence immobilization efficiency, injury, and mortality
C.R. Dolan, L.E. Miranda, T.B. Henry
2002, North American Journal of Fisheries Management (22) 1442-1451
Continuous direct current (DC) and pulsed DC (PDC) of varying frequency and pulse period are commonly used to immobilize and collect crappies Pomoxis spp. in freshwater. However, little information is available about the minimum electrical-setting thresholds required for immobilization or how the settings relate to incidence of injury. We investigated...
An index of biological integrity for northern Mid-Atlantic Slope drainages
R.A. Daniels, K. Riva-Murray, D.B. Halliwell, D. L. Vana-Miller, Michael D. Bilger
2002, Transactions of the American Fisheries Society (131) 1044-1060
An index of biological integrity (IBI) was developed for streams in the Hudson, Delaware, and Susquehanna River drainages in the northeastern United States based on fish assemblage data from the Mohawk River drainage of New York. The original IBI, developed for streams in the U.S. Midwest, was modified to reflect...
Alkylcyclohexanes in environmental geochemistry
F. D. Hostettler, K.A. Kvenvolden
2002, Conference Paper, Environment Canada Arctic and Marine Oil Spill Program Technical Seminar (AMOP) Proceedings
Two case studies of oil spills that demonstrate the changing distribution patterns resulting from long-term anaerobic microbial degradation were presented. These spills were the 1979 crude-oil spill in Bemidji, MN, and a chronic diesel-fuel spillage from 1953-1991 at Mandan, ND. The alkylcyclohexanes in both spilled oil products were affected by...
Pathways of metal transfer from mineralized sources to biorecptors: A synthesis of the Mineral Resources Program's past environmental studies in the Western United States and future research directions
Laurie S. Balistrieri, Lisa L. Stillings, editor(s)
2002, Bulletin 2191
No abstract available....
Tracing sources of sulfur in the Florida Everglades
A. L. Bates, W. H. Orem, J. W. Harvey, E.C. Spiker
2002, Journal of Environmental Quality (31) 287-299
We examined concentrations and sulfur isotopic ratios (34S/32S, expressed as δ34S in parts per thousand [‰] units) of sulfate in surface water, ground water, and rain water from sites throughout the northern Everglades to establish the sources of sulfur to the ecosystem. The geochemistry of sulfur is of particular interest...
Structural and tectonic setting of the Charleston, South Carolina, region: Evidence from the Tertiary stratigraphic record
R.E. Weems, W.C. Lewis
2002, Geological Society of America Bulletin (114) 24-42
Eleven upper Eocene through Pliocene stratigraphic units occur in the subsurface of the region surrounding Charleston, South Carolina. These units contain a wealth of information concerning the long-term tectonic and structural setting of that area. These stratigraphic units have a mosaic pattern of distribution, rather than a simple layered pattern,...
Estimation of shoreline position and change using airborne topographic lidar data
H.F. Stockdon, A. H. Sallenger Jr., J. H. List, R.A. Holman
2002, Journal of Coastal Research (18) 502-513
A method has been developed for estimating shoreline position from airborne scanning laser data. This technique allows rapid estimation of objective, GPS-based shoreline positions over hundreds of kilometers of coast, essential for the assessment of large-scale coastal behavior. Shoreline position, defined as the cross-shore position of a vertical shoreline datum,...
Comment [on 'Are Proterozoic cap carbonates and isotopic excursions a record of gas hydrate destabilization following Earth’s coldest intervals?, Kennedy et al., Geology 29(5), 442-446]
M.D. Max, William P. Dillon
2002, Geology (30) 762-763
We welcome the evidence noted by Kennedy et al. (2001) for strong methane excursions associated with the cessation of glacial episodes. They identify the carbon in cap carbonates overlying glacial sediments as probably being of biogenic origin and as likely having had a biogenic methane source. These authors suggest that...
Methylmercury in flood-control impoundments and natural waters of northwestern Minnesota, 1997-99
M. E. Brigham, D. P. Krabbenhoft, M.L. Olson, J.F. DeWild
2002, Water, Air, & Soil Pollution (138) 61-78
We studied methylmercury (MeHg) and total mercury (HgT) in impounded and natural surface waters in northwestern Minnesota, in settings ranging from agricultural to undeveloped. In a recently constructed (1995) permanent-pool impoundment, MeHg levels typically increased from inflow to outflow during 1997; this trend broke down from late 1998 to early...
Effects of bull elk demographics on age categories of harem bulls
Louis C. Bender
2002, Wildlife Society Bulletin (30) 193-199
Many management strategies for elk (Cervus elaphus) emphasize increasing numbers of mature bulls in the population. These strategies are usually assumed to enhance productivity via increased breeding by mature bulls. I compared age classes of harem bulls during the peak of the rut under 4 bull harvest strategies that resulted...
Calibration and temperature correction of heat dissipation matric potential sensors
A. L. Flint, G. S. Campbell, K. M. Ellett, C. Calissendorff
2002, Soil Science Society of America Journal (66) 1439-1445
This paper describes how heat dissipation sensors, used to measure soil water matric potential, were analyzed to develop a normalized calibration equation and a temperature correction method. Inference of soil matric potential depends on a correlation between the variable thermal conductance of the sensor's porous ceramic and matric potential. Although...
Predators
Donald D. Young, Thomas R. McCabe, Robert E. Ambrose, Gerald W. Garner, Greg J. Weiler, Harry V. Reynolds, Mark S. Udevitz, Dan J. Reed, Brad Griffith
David C. Douglas, Patricia E. Reynolds, E. B. Rhode, editor(s)
2002, Biological Science Report 2002-0001-6
Calving caribou (Rangifer tarandus) of the Central Arctic herd, Alaska, have avoided the infrastructure associated with the complex of petroleum development areas from Prudhoe Bay to Kuparuk (Cameron et al. 1992, Nellemann and Cameron 1998, and Section 4 of this document). Calving females of the Porcupine caribou herd may similarly...
USGS leads United States effort in Mallik Well
2002, Fire in the Ice: NETL Methane Hydrate Newsletter (2) 3-4
This winter, in the extremely cold, far reaches of the upper Northwest Territory of Canada, there is an international consortium of researchers participating in a program to study methane hydrates. The researchers are currently drilling a 1200 m-deep production research well through the permafrost. It is one of three wells...
Regional fluid flow as a factor in the thermal history of the Illinois basin: Constraints from fluid inclusions and the maturity of Pennsylvanian coals
E. L. Rowan, M. B. Goldhaber, J. R. Hatch
2002, American Association of Petroleum Geologists Bulletin (86) 257-277
Vitrinite reflectance measurements on Pennsylvanian coals in the Illinois basin indicate significantly higher thermal maturity than can be explained by present-day burial depths. An interval of additional sedimentary section, now removed by erosion, has been suggested to account for the discrepancy. Although burial could indeed account for the observed maturity...
High-resolution aeromagnetic mapping of volcanic terrain, Yellowstone National Park
C. A. Finn, L. A. Morgan
2002, Journal of Volcanology and Geothermal Research (115) 207-231
High-resolution aeromagnetic data acquired over Yellowstone National Park (YNP) show contrasting patterns reflecting differences in rock composition, types and degree of alteration, and crustal structures that mirror the variable geology of the Yellowstone Plateau. The older, Eocene, Absaroka Volcanic Supergroup, a series of mostly altered, andesitic volcanic and volcaniclastic rocks...
Seafloor geology of the Monterey Bay area continental shelf
S.L. Eittreim, R. J. Anima, A.J. Stevenson
2002, Marine Geology (181) 3-34
Acoustic swath-mapping of the greater Monterey Bay area continental shelf from Point An??o Nuevo to Point Sur reveals complex patterns of rock outcrops on the shelf, and coarse-sand bodies that occur in distinct depressions on the inner and mid-shelves. Most of the rock outcrops are erosional cuestas of dipping Tertiary...
Baseline assessment of instream and riparian-zone biological resources on the Rio Grande in and near Big Bend National Park, Texas
James Bruce Moring
2002, Water-Resources Investigations Report 2002-4106
Five study sites, and a sampling reach within each site, were established on the Rio Grande in and near Big Bend National Park in 1999 to provide the National Park Service with data and information on the status of stream habitat, fish communities, and benthic macroinvertebrates. Differences in stream-habitat conditions...
Ospreys in Oregon and the Pacific Northwest
Charles J. Henny, James L. Kaiser, Robert A. Grove
2002, Fact Sheet 153-02
From early April through September each year, famous residents grace the small western town of Corvallis, Oregon. Two ospreys have become mascots of the town since the pair's arrival in 1994. Their nest, built on a 90-foot power pole near the twin bridges over the Willamette River, could be seen...
A single Alal 39-to-Glu substitution in the Renibacterium salmoninarum virulence-associated protein p57 results in antigenic variation and is associated with enhanced p57 binding to Chinook salmon leukocytes
Gregory D. Wiens, Ron Pascho, James R. Winton
2002, Applied and Environmental Microbiology (68) 3969-3977
The gram-positive bacterium Renibacterium salmoninarum produces relatively large amounts of a 57-kDa protein (p57) implicated in the pathogenesis of salmonid bacterial kidney disease. Antigenic variation in p57 was identified by using monoclonal antibody 4C11, which exhibited severely decreased binding to R. salmoninarum strain 684 p57 and bound robustly to the p57 proteins of seven...
Estimating recharge at Yucca Mountain, Nevada, USA: Comparison of methods
A. L. Flint, L. E. Flint, E. M. Kwicklis, J. T. Fabryka-Martin, G.S. Bodvarsson
2002, Hydrogeology Journal (10) 180-204
Obtaining values of net infiltration, groundwater travel time, and recharge is necessary at the Yucca Mountain site, Nevada, USA, in order to evaluate the expected performance of a potential repository as a containment system for high-level radioactive waste. However, the geologic complexities of this site, its low precipitation and net...
Climate variability from the Florida Bay sedimentary record: Possible teleconnections to ENSO, PNA and CNP
T. M. Cronin, Gary S. Dwyer, S.B. Schwede, C.D. Vann, H. Dowsett
2002, Climate Research (19) 233-245
We analyzed decadal and interannual climate variability in South Florida since 1880 using geochemical and faunal paleosalinity indicators from isotopically dated sediment cores at Russell Bank in Florida Bay (FB). Using the relative abundance of 2 ostracode species and the Mg/Ca ratios in Loxoconcha matagordensis shells to reconstruct paleosalinity, we...
Origins of high-frequency scattered waves near PKKP from large aperture seismic array data
P.S. Earle
2002, Bulletin of the Seismological Society of America (92) 751-760
This article identifies the likely origin of 1-Hz scattered waves in the vicinity of PKKP by comparing measurements of slowness and onset time to ray-theoretical predictions. The measurements are obtained from slant stacks of Large Aperture Seismic Array (LASA) data from 36 earthquakes and six explosions in the range 30??-116??....
