Subsurface temperature as a passkey for exploration of mature basins: Hot anticlines - A key to discovery?
D. F. Merriam
2004, Oil & Gas Journal (102) 29-34
Temperature anomalies associated with oil-producing structures in the US Midcontinent and similar cratonic areas probably can be used reliably as a passkey for petroleum exploration in mature areas, and thus the concept of hot anticlines could be a key to discovery. Analysis of accumulated data during the past several decades...
Titanic exploration with GIS
J.J. Kerski
2004, GeoSpatial Solutions (14) 32-35
To help teachers and students investigate one of the world's most famous historical events using the geographic perspective and GIS tools and methods, the U.S. Geological Survey (USGS) created a set of educational lessons based on the RMS Titanic's April 1912 sailing. With these lessons, student researchers can learn about...
Tritium hydrology of the Mississippi River basin
R. L. Michel
2004, Hydrological Processes (18) 1255-1269
In the early 1960s, the US Geological Survey began routinely analysing river water samples for tritium concentrations at locations within the Mississippi River basin. The sites included the main stem of the Mississippi River (at Luling Ferry, Louisiana), and three of its major tributaries, the Ohio River (at Markland Dam,...
Ecological correlates of fish movement in a network of Virginia streams
B. Albanese, P. L. Angermeier, S. Dorai-Raj
2004, Canadian Journal of Fisheries and Aquatic Sciences (61) 857-869
Identifying factors that influence fish movement is a key step in predicting how populations respond to environmental change. Using mark-recapture (four species) and trap capture (eight species) data, we examined relationships between three attributes of movement and 15 ecological variables. The probability of emigrating from a reach was positively related...
A Complex Systems Model Approach to Quantified Mineral Resource Appraisal
M. E. Gettings, M.W. Bultman, F. S. Fisher
2004, Environmental Management (33) 87-98
For federal and state land management agencies, mineral resource appraisal has evolved from value-based to outcome-based procedures wherein the consequences of resource development are compared with those of other management options. Complex systems modeling is proposed as a general framework in which to build models that can evaluate outcomes. Three...
Fleet dynamics of the commercial lake trout fishery in Michigan waters of Lake Superior during 1929-1961
Michael J. Wilberg, Charles R. Bronte, Michael J. Hansen
2004, Journal of Great Lakes Research (30) 252-266
Understanding fishing fleet dynamics is important when using fishery dependent data to infer the status of fish stocks. We analyzed data from mandatory catch reports from the commercial lake trout (Salvelinus namaycush) fishery in Michigan waters of Lake Superior during 1929–1961, a period when lake trout populations collapsed through the...
New U-series dates at the Caune de l'Arago, France
Christophe Falgueres, Y. Yokoyama, G. Shen, James L. Bischoff, T.-L. Ku, Henry de Lumley
2004, Journal of Archaeological Science (31) 941-952
In the beginning of the 1980s, the Caune de l'Arago was the focus of an interdisciplinary effort to establish the chronology of the Homo heidelbergensis (Preneandertals) fossils using a variety of techniques on bones and on speleothems. The result was a very large spread of dates particularly on bone samples....
Genotoxicity in native fish associated with agricultural runoff events
Andrew Whitehead, Kathryn Kuivila, James L. Orlando, S. Kotelevtsev, Susan L. Anderson
2004, Environmental Toxicology and Chemistry (23) 2868-2877
The primary objective of the present study was to test whether agricultural chemical runoff was associated with in-stream genotoxicity in native fish. Using Sacramento sucker (Catostomus occidentalis), we combined field-caging experiments in an agriculturally dominated watershed with controlled laboratory exposures to field-collected water samples, and we coupled genotoxicity biomarker measurements...
Discrimination among spawning aggregations of lake herring from Lake Superior using whole-body morphometric characters
Michael H. Hoff
2004, Journal of Great Lakes Research (30) 385-394
The lake herring (Coregonus artedi) was one of the most commercially and ecologically valuable Lake Superior fishes, but declined in the second half of the 20th century as the result of overharvest of putatively discrete stocks. No tools were previously available that described lake herring stock structure and accurately classified...
Elements of a predictive model for determining beach closures on a real time basis: the case of 63rd Street Beach Chicago
Greg A. Olyphant, Richard L. Whitman
2004, Environmental Monitoring and Assessment (98) 175-190
Data on hydrometeorological conditions and E. coli concentration were simultaneously collected on 57 occasions during the summer of 2000 at 63rd Street Beach, Chicago, Illinois. The data were used to identify and calibrate a statistical regression model aimed at predicting when the bacterial concentration of the beach water was above...
Comparison of four moderate-size earthquakes in southern California using seismology and InSAR
R.J. Mellors, H. Magistrale, P. Earle, A.H. Cogbill
2004, Bulletin of the Seismological Society of America (94) 2004-2014
Source parameters determined from interferometric synthetic aperture radar (InSAR) measurements and from seismic data are compared from four moderate-size (less than M 6) earthquakes in southern California. The goal is to verify approximate detection capabilities of InSAR, assess differences in the results, and test how the two results can be...
Intra-seasonal mapping of CO2 flux in rangelands of northern Kazakhstan at one-kilometer resolution
B.K. Wylie, T.G. Gilmanov, D.A. Johnson, Nicanor Z. Saliendra, K. Akshalov, L.L. Tieszen, B. C. Reed, Emilio Laca
2004, Environmental Management (33) S482-S491
Algorithms that establish relationships between variables obtained through remote sensing and geographic information system (GIS) technologies are needed to allow the scaling up of site-specific CO2 flux measurements to regional levels. We obtained Bowen ratio-energy balance (BREB) flux tower measurements during the growing seasons of 1998-2000 above a grassland steppe...
Effect of stock size, climate, predation, and trophic status on recruitment of alewives in Lake Ontario, 1978-2000
Robert O’Gorman, Brian F. Lantry, Clifford P. Schneider
2004, Transactions of the American Fisheries Society (133) 855-867
The population of alewives Alosa pseudoharengus in Lake Ontario is of great concern to fishery managers because alewives are the principal prey of introduced salmonines and because alewives negatively influence many endemic fishes. We used spring bottom trawl catches of alewives to investigate the roles of stock size, climate, predation, and lake...
Density dependence and risk of extinction in a small population of sea otters
L.R. Gerber, K.E. Buenau, G. VanBlaricom
2004, Biodiversity and Conservation (13) 2741-2757
Sea otters (Enhydra lutris (L.)) were hunted to extinction off the coast of Washington State early in the 20th century. A new population was established by translocations from Alaska in 1969 and 1970. The population, currently numbering at least 550 animals, A major threat to the population is the ongoing...
St. Louis Metro East region sediment and geomorphic study
T. D. Straub
Sehlke G.Hayes D.F.Stevens D.K., editor(s)
2004, Conference Paper, Proceedings of the 2004 World Water and Environmetal Resources Congress: Critical Transitions in Water and Environmetal Resources Management
Judy's Branch, a small basin (8.64 mi2) near Glen Carbon, Illinois, is selected as a pilot site to determine sediment yield and channel erosion of streams draining the bluffs of the American Bottoms in the Metro East area of Illinois. This paper presents results of an on-going sediment and geomorphic...
An intensity scale for riverine flooding
J.M. Fulford
Sehlke G.Hayes D.F.Stevens D.K., editor(s)
2004, Conference Paper, Proceedings of the 2004 World Water and Environmetal Resources Congress: Critical Transitions in Water and Environmetal Resources Management
Recent advances in the availability and accuracy of multi-dimensional flow models, the advent of precise elevation data for floodplains (LIDAR), and geographical GIS allow the creation of hazard maps that more correctly reflect the varying levels of flood-damage risk across a floodplain when inundatecby floodwaters. Using intensity scales for wind...
Observed and simulated ground motions in the San Bernardino basin region for the Hector Mine, California, earthquake
R.W. Graves, D.J. Wald
2004, Bulletin of the Seismological Society of America (94) 131-146
During the MW 7.1 Hector Mine earthquake, peak ground velocities recorded at sites in the central San Bernardino basin region were up to 2 times larger and had significantly longer durations of strong shaking than sites just outside the basin. To better understand the effects of 3D structure on the...
Influential environmental gradients and spatiotemporal patterns of fish assemblages in the unimpounded Upper Mississippi River
V.A. Barko, M.W. Palmer, D.P. Herzog, B.S. Ickes
2004, American Midland Naturalist (152) 369-385
We investigated variation of fish assemblages in response to environmental factors using Long Term Resource Monitoring Program data. Data were collected from 1993 to 2000 from five physical habitats in the unimpounded upper Mississippi River. We captured 89 species composing 18 families. Of these, 26% were fluvial specialists, 25% were...
Transport and time lag of chlorofluorocarbon gases in the unsaturated zone, Rabis Creek, Denmark
Peter Engesgaard, Anker L. Højberg, Klaus Hinsby, Karsten H. Jensen, Troels Laier, Flemming Larsen, Eurybiades Busenberg, Niel Plummer
2004, Vadose Zone Journal (3) 1249-1261
Transport of chlorofluorocarbon (CFC) gases through the unsaturated zone to the water table is affected by gas diffusion, air–water exchange (solubility), sorption to the soil matrix, advective–dispersive transport in the water phase, and, in some cases, anaerobic degradation. In deep unsaturated zones, this may lead to a time lag between...
Detection of human enteric viruses in stream water with RT-PCR and cell culture
K. Denis-Mize, G.S. Fout, D.R. Dahling, D.S. Francy
2004, Journal of Water and Health (2) 37-47
A multiplex RT-PCR method was used to measure virus occurrence at five stream water sites that span a range of hydroclimatic, water-quality, and land-use characteristics. The performance of the molecular method was evaluated in comparison with traditional cell culture and Escherichia coli membrane filtration assays. The study incorporated multiple quality...
Mapping recent lava flows at Westdahl Volcano, Alaska, using radar and optical satellite imagery
Z. Lu, Russ Rykhus, Timothy Masterlark, K.G. Dean
2004, Remote Sensing of Environment (91) 345-353
Field mapping of young lava flows at Aleutian volcanoes is logistically difficult, and the utility of optical images from aircraft or satellites for this purpose is greatly reduced by persistent cloud cover. These factors have hampered earlier estimates of the areas and volumes of three young lava flows at Westdahl...
Use of spatial statistics and isotopic tracers to measure the influence of arsenical pesticide use on stream sediment chemistry in New England, USA
G.R. Robinson Jr., R. A. Ayuso
2004, Conference Paper, Applied Geochemistry
Arsenical pesticides and herbicides, principally Pb arsenate, Ca arsenate, and Na arsenate with lesser use of other metal-As pesticides, were widely applied on apple, blueberry, and potato crops in New England during the first half of the twentieth century. Agricultural census data for this time period is used to define...
Estimating accumulation rates and physical properties of sediment behind a dam: Englebright Lake, Yuba River, northern California
Noah P. Snyder, David M. Rubin, Charles N. Alpers, Jonathan R. Childs, Jennifer A. Curtis, Lorraine E. Flint, Scott Wright
2004, Water Resources Research (40)
Studies of reservoir sedimentation are vital to understanding scientific and management issues related to watershed sediment budgets, depositional processes, reservoir operations, and dam decommissioning. Here we quantify the mass, organic content, and grain-size distribution of a reservoir deposit in northern California by two methods of extrapolating measurements of sediment physical...
Origin of the Blue Ridge escarpment along the passive margin of Eastern North America
J.A. Spotila, G.C. Bank, P.W. Reiners, C. W. Naeser, N. D. Naeser, B.S. Henika
2004, Basin Research (16) 41-63
The Blue Ridge escarpment is a rugged landform situated within the ancient Appalachian orogen. While similar in some respects to the great escarpments along other passive margins, which have evolved by erosion following rifting, its youthful topographic expression has inspired proposals of Cenozoic tectonic rejuvenation in eastern North America. To...
Baseflow contribution to nitrate-nitrogen export from a large, agricultural watershed, USA
K. Schilling, Y.-K. Zhang
2004, Journal of Hydrology (295) 305-316
Nitrate-nitrogen export from the Raccoon River watershed in west-central Iowa is among the highest in the United State and contributes to impairment of downstream water quality. We examined a rare long-term record of streamflow and nitrate concentration data (1972-2000) to evaluate annual and seasonal patterns of nitrate losses in streamflow...
