Shape-selective adsorption of aromatic molecules from water by tetramethylammonium-smectite
J. Lee, M.M. Mortland, S.A. Boyd, C. T. Chiou
1989, Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases (85) 2953-2962
The adsorption of aromatic compounds by smectite exchanged with tetramethylammonium (TMA) has been studied. Aromatic compounds adsorbed by TMA-smectite are assumed to adopt a tilted orientation in a face-to-face arrangment with the TMA tetrahedra. The sorptive characteristics of TMA-smectite were influenced strongly by the presence of water. The dry TMA-smectite...
Structural marsh management research priorities
Donald R. Cahoon, Charles G. Groat
1989, Conference Paper, Coastal Zone: Proceedings of the Symposium on Coastal and Ocean Management
The paper presents a prioritized list of research issues related to structural marsh management developed by a multidisciplinary panel of regulatory agency representatives, landowners, and scientists. More than 75 issues were identified concerning landscape changes, influence on ecological processes (i.e., hydrologic, biologic, and edaphic factors), habitat quality, cumulative impacts, and...
A comparison of two finite element models of tidal hydrodynamics using a North Sea data set
Roy A. Walters, Francisco Werner
1989, Advances in Water Resources (12) 184-193
Using the region of the English Channel and the southern bight of the North Sea, we systematically compare the results of two independent finite element models of tidal hydrodynamics. The model intercomparison provides a means for increasing our understanding of the relevant physical processes in the region in question as...
Recorded seismic response of a base-isolated steel bridge carrying a steel water pipe
E. Safak, A. G. Brady
1989, Conference Paper, American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
A set of strong motion records was obtained from the base-isolated Santa Ana River Pipeline Bridge during the magnitude 5.9 Whittier Narrows, California, earthquake of October 1, 1987. The analysis of the records show that the level of excitation was not strong enough to fully activate the base isolators. The...
A satellite-based digital data system for low-frequency geophysical data
S. Silverman, C. Mortensen, M. Johnston
1989, Bulletin of the Seismological Society of America (79) 189-198
A reliable method for collection, display, and analysis of low-frequency geophysical data from isolated sites, which can be throughout North and South America and the Pacific Rim, has been developed for use with the Geostationary Operational Environmental Satellite (GOES) system. Geophysical data primarily intended for earthquake hazard and crustal deformation...
Geochemistry of thermal water from selected wells, Boise, Idaho
Robert H. Mariner, H.W. Young, D. J. Parliman, William C. Evans
1989, Conference Paper, Transactions - Geothermal Resources Council
Samples of thermal water from selected wells in the Boise area were analyzed for chemical composition; stable isotopes of hydrogen, oxygen, and dissolved carbon; radioactive carbon; and dissolved-gas concentrations. Chemically, the waters are virtually identical to those of the adjacent Idaho batholith. Isotopically, the thermal waters are more depleted in...
Characterization of coal-derived hydrocarbons and source-rock potential of coal beds, San Juan Basin, New Mexico and Colorado, U.S.A.
D. D. Rice, J.L. Clayton, M. J. Pawlewicz
1989, International Journal of Coal Geology (13) 597-626
Coal beds are considered to be a major source of nonassociated gas in the Rocky Mountain basins of the United States. In the San Juan basin of northwestern New Mexico and southwestern Colorado, significant quantities of natural gas are being produced...
Biogeography of marine podocopid Ostracodes in Micronesia
L.S. Weissleader, N.L. Gilinsky, R. M. Ross, T. M. Cronin
1989, Journal of Biogeography (16) 103-114
Shallow-water podocopic marine Ostracoda from Micronesian lagoons in the Marianas, Caroline, Marshall and Gilbert Islands in the western Pacific were analysed to establish their diversity and zoogeography within Micronesia and the taxonomic affinities with ostracodes from other tropical regions. Sixty-four bottom lagoonal sediment samples from twelve islands and atolls yielded...
Simulation of ground-water flow in coastal southern New Jersey
Frederick J. Spitz, Thomas H. Barringer
1989, Conference Paper, Coastal Zone: Proceedings of the Symposium on Coastal and Ocean Management
An increasing trend of shallow ground-water withdrawal over the first part of this century on the Cape May Peninsula of New Jersey has resulted in the intrusion of saltwater into the aquifers that comprise the shallow ground-water system. The U.S. Geological Survey has developed a mathematical model of the flow...
The campi flegrei (Italy) geothermal system: A fluid inclusion study of the mofete and San Vito fields
Vivo B. de, H. E. Belkin, M. Barbieri, W. Chelini, P. Lattanzi, A. Lima, L. Tolomeo
1989, Journal of Volcanology and Geothermal Research (36) 303-326
A fluid inclusion study of core from the Mofete 1, Mofete 2, Mofete 5, San Vito 1, and San Vito 3 geothermal wells (Campi Flegrei, Campania, Italy) indicates that the hydrothermal minerals were precipitated from aqueous fluids (??CO2) that were moderately saline (3-4 wt.% NaCl equiv.) to hypersaline (> 26...
The Relief Canyon gold deposit, Nevada: A mineralized solution breccia
A. R. Wallace
1989, Economic Geology (84) 279-290
The Relief Canyon gold deposit in the Humboldt Range of western Nevada is a low-grade, high-tonnage orebody of Tertiary or younger age. The host rocks include limestones of the Triassic Cane Spring Formation, which are overlain by shales of the Triassic Grass Valley Formation. The rocks were folded and metamorphosed...
Speciation and equilibrium relations of soluble aluminum in a headwater stream at base flow and during rain events
Douglas A. Burns
1989, Water Resources Research (25) 1653-1665
In a small watershed in the Shenandoah National Park, Virginia, the short-term dynamics of soluble aluminum in stream water sampled during rain events differed significantly from stream water sampled during base flow conditions. Three fractions of dissolved aluminum were measured. The inorganic monomeric fraction made up approximately two thirds of...
Retention and transport of nutrients in a third-order stream: Channel processes
Frank J. Triska, Vance C. Kennedy, Ronald J. Avanzino, Gary W. Zellweger, Kenneth E. Bencala
1989, Ecology (70) 1877-1892
Chloride was injected as a conservative tracer with nitrate to examine nitrate retention (storage plus biotic uptake) and transport in a 327—m reach of a third—order stream draining a forested basin in northwestern California. Prior to injections, diel patterns of nutrient concentrations were measured under background conditions. Nitrate concentration of...
Aqueous chlorination of resorcinol
V.L. Heasley, M.D. Burns, N.A. Kemalyan, T.C. Mckee, H. Schroeter, B.R. Teegarden, S.E. Whitney, R.L. Wershaw
1989, Environmental Toxicology and Chemistry (8) 1159-1163
An investigation of the aqueous chlorination (NaOCl) of resorcinol is reported. The following intermediates were detected in moderate to high yield at different pH values and varying percentages of chlorination: 2-chloro-, 4-chloro-, 2,4-dichloro-, 4,6-dichloro- and 2,4,6-trichlororesorcinol. Only trace amounts of the intermediates were detected when the chlorination was conducted in...
Convergance experiments with a hydrodynamic model of Port Royal Sound, South Carolina
J. K. Lee, R.W. Schaffranek, R.A. Baltzer
1989, Conference Paper
A two-demensional, depth-averaged, finite-difference, flow/transport model, SIM2D, is being used to simulate tidal circulation and transport in the Port Royal Sound, South Carolina, estuarine system. Models of a subregion of the Port Royal Sound system have been derived from an earlier-developed model of the entire system having a grid size...
Land drainage and estuarine salinity response
Jerad D. Bales
1989, Conference Paper
An investigation is being conducted to (1) quantify the short-term effects of freshwater agricultural drainage on salinity in a tidal creek and (2) evaluate the off-site effects of water-control structures on flow and water quality in channels that drain cropland in the Albemarle-Pamlico region of North Carolina. A continuous record...
Origin and age of the Lake Nyos maar, Cameroon
J. P. Lockwood, M. Rubin
1989, Journal of Volcanology and Geothermal Research (39) 117-124
Lake Nyos occupies a young maar crater in the Precambrian granitic terrane of northwest Cameroon. The lake is partly surrounded by poorly consolidated, ultramafic nodule-bearing pyroclastic surge deposits that were explosively ejected from the Nyos crater at the time of its formation. Radiocarbon dates show that the maar probably formed...
Geochemical controls on vanadium accumulation in fossil fuels
G. N. Breit, R. B. Wanty
1989, Conference Paper, Preprints Symposia
High vanadium contents in petroleum and other fossil fuels have been attributed to organic-matter type, organisms, volcanic emanations, diffusion of sea water, and epigenetic enrichment. However, these factors are inadequate to account for the high abundance of vanadium in some fossil fuels and the paucity in others. By examining vanadium...
Observed parameters for turbidity-current flow in channels, Reserve Fan, Lake Superior
W. R. Normark
1989, Journal of Sedimentary Petrology (59) 423-431
Fine-grained tailings discharged from a taconite-ore processing operation near the shore of Lake Superior produced turbidity currents that transported the sediment from a small delta into deep water at Silver Bay, Minnesota. Deposition over nearly 20 years produced a sublacustrine fan with two...
Non-energy resources, Connecticut and Rhode Island coastal waters
N.F. Neff, R. S. Lewis
1989, Marine Geology (90) 125-130
Cores collected from Long Island Sound, Connecticut, were used to establish control on the geologic framework of the area. Lithologic and stratigraphic analyses verified the presence of the following units: (1) Cretaceous coastal plain, (2) Pleistocene glacial till, (3) late Pleistocene...
Spreadsheet WATERSHED modeling for nonpoint-source pollution management in a Wisconsin basin
J.F. Walker, S.A. Pickard, W.C. Sonzogni
1989, Water Resources Bulletin (25) 139-147
Although several sophisticated nonpoint pollution models exist, few are available that are easy to use, cover a variety of conditions, and integrate a wide range of information to allow managers and planners to assess different control strategies. Here, a straightforward pollutant input accounting approach is presented in the form of...
Nitrogen cycling between sediment and the shallow-water column in the transition zone of the Potomac River and Estuary. II. The role of wind-driven resuspension and adsorbed ammonium
N.S. Simon
1989, Estuarine, Coastal and Shelf Science (28) 531-547
During periods of sediment resuspension, desorption of ammonium from sediment solids can be the major pathway for enriching the water column with the ammonium that is produced by bacterial degradation of organic matter in the bottom material. This hyopthesis is based on a three-year study of diffusive flux in the...
Multiple hydrothermal and metamorphic events in the Kidd Creek volcanogenic massive sulphide deposit, Timmins, Ontario: evidence from tourmalines and chlorites
J. F. Slack, P.R. Coad
1989, Canadian Journal of Earth Sciences (26) 694-715
Tourmaline and chlorite are the principal ferromagnesian silicate minerals in the Kidd Creek massive sulphide deposit. Tourmaline is most common in sphalerite-rich peripheral margins of the chalcopyrite stringer zone. Within the north orebody, samples typically contain <1% tourmaline, but small areas (hand-specimen scale) may have 10–20%. Chlorite is more widely...
Horizontal anisotropy of the principal ground-water flow zone in the Salinas alluvial fan, Puerto Rico
V. Quinones-Aponte
1989, Ground Water (27) 491-500
Well drawdown data from an anisotropic aquifer in the Salinas alluvial fan were collected and analyzed with a computer program called TENSOR2D. The program uses ordinary and weighted least-squares optimization procedures to solve the system of simultaneous equations needed to define the theoretical transmissivity ellipse. Prediction of drawdown data was...
Quantitative dye-tracing of karst ground-water flow
James Smoot, Donald S. Mull, Timothy Liebermann
1989, Conference Paper
Analysis of the results of repeat quantitative dye traces between a sinkhole and a spring used for public water supply were used to describe predictive relations between discharge, mean travel time, apparent ground-water flow velocity and solute transport characteristics. Normalized peak concentration, mean travel time, and standard deviation of travel...
