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Page 4568, results 114176 - 114200

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Not all publications have extents, not all extents are completely accurate
Installation of observation wells on hazardous waste sites in Kansas using a hollow-stem auger
C. A. Perry, R. J. Hart
1985, Ground Water Monitoring and Remediation (5) 70-73
Noncontaminating procedures were used during the hollow-stem auger installation of 12 observation wells on three hazardous waste sites in Kansas. Special precautions were taken to ensure that water samples were representative of the ground water in the aquifer and were not subjected to contamination from the land surface or cross...
The National Cartographic Information Center: An information resource on mapping products for the nation
Alan R. Stevens
1985, Science and Technology Libraries (5) 25-38
Since its inception in 1974 the National Cartographic Information Center (NCIC), U.S. Geological Survey, has rapidly developed to become a focial point for providing information on the availability of cartographic data, including maps/charts, aerial photographics, satellite imagery, geodetic control, digitial mapping data, map materials and related cartographic products. In early...
A two-dimensional dam-break flood plain model
T. V. Hromadka II, C. E. Berenbrock, J. R. Freckleton, G. L. Guymon
1985, Advances in Water Resources (8) 7-14
A simple two-dimensional dam-break model is developed for flood plain study purposes. Both a finite difference grid and an irregular triangle element integrated finite difference formulation are presented. The governing flow equations are approximately solved as a diffusion model coupled to the equation of continuity. Application of the model to...
Earthquake hazards to domestic water distribution systems in Salt Lake County, Utah
Lynn M. Highland
1985, Conference Paper
A magnitude-7. 5 earthquake occurring along the central portion of the Wasatch Fault, Utah, may cause significant damage to Salt Lake County's domestic water system. This system is composed of water treatment plants, aqueducts, distribution mains, and other facilities that are vulnerable to ground shaking, liquefaction, fault movement, and slope...
Characteristics of the aftershock sequence of the Borah Peak, Idaho, earthquake determined from digital recordings of the events
John Boatwright
1985, Bulletin of the Seismological Society of America (75) 1265-1284
The U.S. Geological Survey, Menlo Park, deployed and maintained a network of twelve digital instruments over the 2 weeks following the 28 October 1983 Borah Peak, Idaho, earthquake. The network recorded 45 events with M ≧ 3.0, and 6 events with M ≦ 4.0. The epicenters are located in a...
Algorithm to reduce approximation error from the complex-variable boundary-element method applied to soil freezing.
T. V. Hromadka II, G. L. Guymon
1985, Numerical heat transfer (8) 115-130
An algorithm is presented for the numerical solution of the Laplace equation boundary-value problem, which is assumed to apply to soil freezing or thawing. The Laplace equation is numerically approximated by the complex-variable boundary-element method. The algorithm aids in reducing integrated relative error by providing a true measure of modeling...
Organochlorine concentrations in prefledging common terns Sterna hirundo at three Rhode Island USA colonies
T. W. Custer, C.M. Bunck, C.L. Stafford
1985, Colonial Waterbirds (8) 150-154
Concentrations of DDE, polychlorinated biphenyls (PCBs), and polychlorinated diphenyl ethers (PCDPEs) in carcasses of prefledging Common Terns (Sterna hirundo) at three Rhode Island colonies support the hypothesis that local contamination is responsible for among-colony differences observed in eggs in an earlier study. The highest concentrations of DDE and PCBs (mean=0.24...
Invertebrate colonization rates in the tailwater of a Kentucky flood-control reservoir
W.D. Swink, J.F. Novotny
1985, Journal of Freshwater Ecology (3) 27-34
Invertebrate colonization on newly introduced rock substrates was examined from July through October 1982 in the tailwater of Barren River Lake, Kentucky. Chironomidae, the dominant taxon of benthic insects, reached full colonization by day 14. Colonization by Oligochaeta, the other major invertebrate taxon, was not completed by the end...
Distribution and food habits of young-of-the-year fishes in a backwater lake of the upper Mississippi River
L. E. Holland, M.L. Huston
1985, Journal of Freshwater Ecology (3) 81-91
The distribution patterns and food habits of young-of-the-year (YOY) fishes in a lentic area adjacent to the main channel of Pool 7 of the upper Mississippi River were studied. Habitats sampled grouped distinctly based on percent composition and abundance of YOY fishes with those having submergent vegetation dominated...
Nonpoint-source discharges and water quality of the Elk Creek basin, west-central Wisconsin
S. J. Field
1985, Water-Resources Investigations Report 84-4094
The Elk Creek basin in west-central Wisconsin was studied during the 1980 water year to define the water quality in relation to streamflow. Agricultural nonpoint-source discharges were suspected of contributing significantly to degraded water quality. Two water quality and streamflow gaging stations were established--one on Elk Creek near Independence and...
The copper-nickel concentration log: A tool for stratigraphic interpretation within the ultramafic and basal zones of the stillwater complex, Montana
L.J. Drew, W.J. Bawiec, N.J. Page, J.H. Schuenemeyer
1985, Journal of Geochemical Exploration (23) 117-137
An analogue to the electric well log was devised for copper-nickel concentration drill-hole data from the Basal and lower part of the Ultramafic zones of the Stillwater Complex using automated data processing. The copper-nickel concentration logs graphically represent intensity (concentration) values that reflect the distribution of the elements in sulfide...
Seismic and geochemical evidence for shallow gas in sediment on Navarin continental margin, Bering Sea
Paul R. Carlson, Margaret Golan-Bac, Herman A. Karl, Keith A. Kvenvolden
1985, American Association of Petroleum Geologists Bulletin (69) 422-436
Marine seismic studies coupled with geochemical investigations demonstrate that hydrocarbon gases are ubiquitous in the near-surface (<= 250 m or 820 ft depth) sediment of the Navarin continental margin in the northern Bering Sea. Three types of acoustic anomalies appear to be related to the presence of gas in the...
Petrology and tectonic significance of augen gneiss from a belt of Mississippian granitoids in the Yukon-Tanana terrane, east- central Alaska
Cynthia Dusel-Bacon, John N. Aleinikoff
1985, Geological Society of America Bulletin (96) 411-425
An approximately E-W-trending belt of porphyritic peraluminous granitic rocks, metamorphosed and deformed to augen gneiss, is exposed for 400 km across the Yukon-Tanana terrain. Chemical, textural, and isotopic data from large augen-gneiss bodies indicate that these bodies originated as early Mississippian granitic rocks that assimilated, or were anatectically derived from,...
Recent movement on the Garlock Fault as suggested by water level fluctuations in a well in Fremont Valley, California
Diane K. Lippincott, John D. Bredehoeft, W. R. Moyle Jr.
1985, Journal of Geophysical Research Solid Earth (90) 1911-1924
Water levels have been continuously recorded since March 1978 in a well in Fremont Valley, where several strands of the adjacent Garlock fault zone have exhibited both left-lateral displacement and components of normal displacement. Differences in water levels indicate that a fault segment lies between the observation well and a...
DATA ACQUISITION AND APPLICATIONS OF SIDE-LOOKING AIRBORNE RADAR IN THE U. S. GEOLOGICAL SURVEY.
John Edwin Jones, Allan N. Kover
1985, Conference Paper, Technical Papers of the American Society of Photogrammetry, Annual Meeting
The Side-Looking Airborne Radar (SLAR) program encompasses a multi-discipline effort involving geologists, hydrologists, engineers, geographers, and cartographers of the U. S. Geological Survey (USGS). Since the program began in 1980, more than 520,000 square miles of aerial coverage of SLAR data in the conterminous United States and Alaska have been...
Some mineral stability relations in the system CaO MgO SiO2 H2O HCl
R.W. Luce, G.L. Cygan, J.J. Hemley, W. M. d’Angelo
1985, Geochimica et Cosmochimica Acta (49) 525-538
Mineral-aqueous solution equilibria for the assemblages talc-quartz, tremolite-talc-quartz, diopside-tremolite-quartz, wollastonite-diopside-quartz and wollastonite-quartz have been studied at 2 kb total pressure, 500° to 700°C and chloride concentrations from 0.03 to 6.0 molal. Most work was at 1 m chloride. Both buffered and unbuffered data were obtained and a recalibration of the...
Lake trout reproductive behavior: influence of chemosensory cues from young-of-the-year by-products
Neal R. Foster
1985, Transactions of the American Fisheries Society (114) 794-803
Chemosensory cues, particularly those emanating from substrate areas occupied by previously hatched young, may play an important role in the reproductive behavior of lake trout Salvelinus namaycush. Support for this hypothesis was obtained in laboratory experiments. Adults were placed in a large circular pool with four experimental reefs. Egg membranes...
A heat-flow reconnaissance of southeastern Alaska
J.H. Sass, L.A. Lawver, R. J. Munroe
1985, Canadian Journal of Earth Sciences (22) 416-421
Heat flow was measured at nine sites in crystalline and sedimentary rocks of southeastern Alaska. Seven of the sites, located between 115 and 155 km landward of the Queen Charlotte – Fairweather transform fault, have an average heat flow of 59 ± 6 mW m−2. This value is significantly higher than the mean of 42 mW m−2 in...
SIMULATING FLOW IN THE TIDAL POTOMAC RIVER.
Raymond W. Schaffranek
1985, Conference Paper
A one-dimensional unsteady flow model has been applied to the tidal Potomac River, including its major tributaries and marginal embayments, between Washington, D. C. and Indian Head, Md. The computer model has been calibrated to simulate the combined effects of tide, freshwater inflows, and wind conditions governing flow in the...
GROUND-WATER DRAINAGE TO SURFACE MINES REFINED.
Linda S. Weiss
1985, Conference Paper
Changes in seepage flux and hydraulic head (ground-water level) resulting from ground-water drainage into the first and subsequent cuts of a surface coal mine can be estimated by a technique that considers drainage from the unsaturated zone and drainage effects of the advancing mine. A 'single-layer' technique is used, in...
ANALYZING NUMERICAL ERRORS IN DOMAIN HEAT TRANSPORT MODELS USING THE CVBEM.
T. V. Hromadka II
Chung Jin S.Lunardini Virgil J.Chakrabarti S.K.Wang Y.S.Sodhi D.S.Karal K., editor(s)
1985, Conference Paper, Proceedings of the International Offshore Mechanics and Arctic Engineering Symposium
Besides providing an exact solution for steady-state heat conduction processes (Laplace Poisson equations), the CVBEM (complex variable boundary element method) can be used for the numerical error analysis of domain model solutions. For problems where soil water phase change latent heat effects dominate the thermal regime, heat transport can be...