Big Soda Lake (Nevada). 4. Vertical fluxes of particulate matter: Seasonality and variations across the chemocline
James E. Cloern, Brian E. Cole, Sally M. Wienke
1987, Limnology and Oceanography (32) 815-824
Vertical fluxes of particulate organic matter were measured with sediment traps above and below the chemocline of Big Soda Lake to define the seasonality of sinking losses from the mixolimnion and determine the effectiveness of the chemocline (pycnocline) as a barrier to the sinking of biogenic particles. Seasonality of sedimentation...
Rapid assay for microbially reducible ferric iron in aquatic sediments
Derek R. Lovely, Elizabeth Philips
1987, Applied and Environmental Microbiology (53) 1536-1540
The availability of ferric iron for microbial reduction as directly determined by the activity of iron-reducing organisms was compared with its availability as determined by a newly developed chemical assay for microbially reducible iron. The chemical assay was based on the reduction of poorly crystalline ferric iron by hydroxylamine under...
A wireline piston core barrel for sampling cohesionless sand and gravel below the water table
Michael M. Zapico, Samuel Vales, John A. Cherry
1987, Groundwater Monitoring & Remediation (7) 74-82
A coring device has been developed to obtain long and minimally disturbed samples of saturated cohesionless sand and gravel. The coring device, which includes a wireline and piston, was developed specifically for use during hollow-stem auger drilling but it also offers possibilities for cable tool and rotary drilling. The core...
Aqueous pyrite oxidation by dissolved oxygen and by ferric iron
Carl O. Moses, D. Kirk Nordstrom, Janet S. Herman, Aaron L. Mills
1987, Geochimica et Cosmochimica Acta (51) 1561-1571
Rates of aqueous, abiotic pyrite oxidation were measured in oxygen-saturated and anaerobic Fe(III)-saturated solutions with initial pH from 2 to 9. These studies included analyses of sulfite, thiosulfate, polythionates and sulfate and procedures for cleaning oxidation products from pyrite surfaces were evaluated. Pyrite oxidation in oxygen-saturated solutions produced (1) rates...
Increased solubility of quartz in water due to complexing by organic compounds
P. Bennett, D. I. Siegel
1987, Nature (326) 684-686
Quartz is the most stable natural solid phase of silica. It weathers extremely slowly at the Earth's surface1, and often resists weathering even after all other silicate minerals have been degraded. However, there is ample evidence from both ancient and modern environments indicating enhanced dissolution and mobility of silica under...
Monodisperse ferrous phosphate colloids in an anoxic groundwater plume
Philip M. Gschwend, Matthew D. Reynolds
1987, Journal of Contaminant Hydrology (1) 309-327
Groundwater samples collected near a secondary-sewage infiltration site on Cape Cod, Massachusetts were examined for colloidal materials (10–1000 nm). In two wells the water contained a population of monodisperse 100-nm particles, detected using laser-light scattering and autocorrelation data processing. SEM and SEM-EDAX analysis of these colloidal materials collected on ultrafilters...
Synopsis of wetland functions and values: bottomland hardwoods with special emphasis on eastern Texas and Oklahoma
D.L. Wilkinson, K. Schneller-McDonald, R.W. Olson, G.T. Auble
1987, Report, Biological Report
Bottomland hardwood wetlands are the natural cover type of many floodplain ecosystems in the southeastern United States. They are dynamic, productive systems that depend on intermittent flooding and moving water for maintenance of structure and function. Many of the diverse functions performed by bottomland hardwoods (e.g., flood control, sediment trapping,...
Some effects of acid mine drainage on Clear Creek, Colorado
W. H. Ficklin, K. S. Smith, Katherine Walton-Day
1987, Book chapter, A view of water supply, water quality and geotechnical engineering in Denver, Jefferson, Gilpin and Clear Creek counties, Colorado: Sixth annual field trip guidebok
No abstract available....
Inhibition of aqueous copper and lead adsorption onto goethite by dissolved carbonate species
Kathleen S. Smith, D. Langmuir
R. C. Averett, D.M. McKnight, editor(s)
1987, Book chapter, Chemical quality of water and the hydrologic cycle
No abstract available. ...
Fitting straight lines in the earth sciences
B.M. Troutman, G. P. Williams
1987, Book chapter, Use and abuse of statistical methods in the earth sciences
No abstract available. ...
Bioconcentration of creosote compounds in snails obtained from Pensacola Bay, Florida, near an onshore hazardous-waste site
C. E. Rostad, W. E. Pereira
Robert C. Averett, editor(s)
1987, Book chapter, Chemical quality of water and the hydrologic cycle
No abstract available. ...
US GEOLOGICAL SURVEY'S NATIONAL SYSTEM FOR PROCESSING AND DISTRIBUTION OF NEAR REAL-TIME HYDROLOGICAL DATA.
William G. Shope Jr.
Rodda J.C.Matalas N.C., editor(s)
1987, Conference Paper, IAHS Publication (International Association of Hydrological Sciences)
The US Geological Survey is utilizing a national network of more than 1000 satellite data-collection stations, four satellite-relay direct-readout ground stations, and more than 50 computers linked together in a private telecommunications network to acquire, process, and distribute hydrological data in near real-time. The four Survey offices operating a satellite...
Crude oil identification with electrothermal vaporization-multiple wavelength absorption spectrometry
J.M. Shekiro Jr., R. K Skogerboe, Howard E. Taylor
1987, Chemosphere (16) 983-988
A spectrometric technique utilizing electrothermal vaporization (graphite furnace) and gas phase-multiple wavelength absorption with photodiode array detection is used to characterize crude oil....
A compositional multiphase model for groundwater contamination by petroleum products: 1. Theoretical considerations
M. Yavuz Corapcioglu, Arthur L. Baehr
1987, Water Resources Research (23) 191-200
A mathematical model is developed to describe the fate of hydrocarbon constituents of petroleum products introduced to soils as an immiscible liquid from sources such as leaking underground storage tanks and ruptured pipelines. The problem is one of multiphase transport (oil (immiscible), air, and water phases) of a reactive contaminant...
An empirical model for estimating phytoplankton productivity in estuaries
B.E. Cole, J. E. Cloern
1987, Marine Ecology Progress Series (396) 299-305
e have previously shown that primary productivity in San Francisco Bay, USA, is highly correlated with phytoplankton biomass B (chlorophyll a concentration) and an index of light avallability in the photic zone, 2, I, (photic depth times surface irradiance). To test the generality of this relation, we compiled data from...
Compilation of hydrologic data for the Edwards aquifer, San Antonio area, Texas, 1985, with 1934-85 summary
G. B. Ozuna, G.M. Nalley, M. N. Bowman
1987, Edwards Underground Water District Bulletin 45
No abstract available....
Some effects of climate variability on hydrology in western North America
D. H. Peterson, D.R. Cayan, J. S. Dileo-Stevens, T.G. Ross
1987, Conference Paper, The influence of climate change and climatic variability on the hydrologic regime and water resources (Proceedings of the Vancouver Symposium, August 1987), IAHS Publication no. 168
The strong north-south gradient in precipitation along the West Coast makes this region an interesting laboratory for studying the influence of climate on runoff variability in general and riverine chemistry in particular. Interannual fluctuations in large-scale atmospheric circulation and associated precipitation and runoff can produce major disruptions in the "average"...
Fate and movement of azaarenes and their anaerobic biotransformation products in an aquifer contaminated by wood-treatment chemicals
W. E. Pereira, C.E. Rostad, D.M. Updegraff, J.L. Bennett
1987, Environmental Toxicology and Chemistry (6) 163-176
Infiltration of wastes containing creosote and pentachlorophenol from surface impoundments at an abandoned wood-treatment facility near Pensacola, Florida, resulted in contamination of the underlying sand and gravel aquifer. Pond sludges and sediments near the source were contaminated with 2- to 5-ring azaarenes having log Kow values of from 2.0 to...
A compositional multiphase model for groundwater contamination by petroleum products: 2. Numerical solution
Arthur L. Baehr, M. Yavuz Corapcioglu
1987, Water Resources Research (23) 201-213
In this paper we develop a numerical solution to equations developed in part 1 (M. Y. Corapcioglu and A. L. Baehr, this issue) to predict the fate of an immiscible organic contaminant such as gasoline in the unsaturated zone subsequent to plume establishment. This solution, obtained by using a finite...
U. S. GEOLOGICAL SURVEY'S NATIONAL REAL-TIME HYDROLOGIC INFORMATION SYSTEM USING GOES SATELLITE TECHNOLOGY.
William G. Shope Jr.
1987, Conference Paper
The U. S. Geological Survey maintains the basic hydrologic data collection system for the United States. The Survey is upgrading the collection system with electronic communications technologies that acquire, telemeter, process, and disseminate hydrologic data in near real-time. These technologies include satellite communications via the Geostationary Operational Environmental Satellite, Data...
Growth determinations for unattached bacteria in a contaminated aquifer
R.W. Harvey, L.H. George
1987, Applied and Environmental Microbiology (53) 2992-2996
Growth rates of unattached bacteria in groundwater contaminated with treated sewage and collected at various distances from the source of contamination were estimated by using frequency of dividing cells and tritiated-thymidine uptake and compared with growth rates obtained with unsupplemented, closed-bottle incubations. Estimates of bacterial generation times [(In 2)/μ] along...
Playa-lake basins on the Southern High Plains of Texas and New Mexico: Part II. A hydrologic model and mass-balance arguments for their development.
W.W. Wood, W. R. Osterkamp
1987, Geological Society of America Bulletin (99) 224-230
Hydrologic, geologic, geomorphic, and mass-balance data suggest that most of the ∼30,000 playa lake basins on the Southern High Plains have developed by a combination of dissolution of caliche and piping of surface material into the unsaturated zone rather than by eolian processes as has generally been stated. A conceptual...
Hydrogeological concepts in the United States: a historical perspective.
J.E. Moore, B.B. Hanshaw
1987, Episodes (10) 315-321
Reviews the development of hydrogeological concepts in the USA from 1879 to 1987, from early qualitative reconnaissance investigations to modern qualitative and multi-disciplinary studies involving predictive analytical techniques and a consideration of management practices. The authors present a sampling of historical milestone papers in US hydrology in the form of...
Determination of alkylbenzenesulfonate surfactants in groundwater using macroreticular resins and carbon-13 nuclear magnetic resonance spectrometry
E. Michael Thurman, T. Willoughby, Larry B. Barber, Kevin A. Thorn
1987, Analytical Chemistry (59) 1798-1802
Alkylbenzenesulfonate surfactants were determined in groundwater at concentrations as low as 0.3 mg/L. The method uses XAD-8 resin for concentration, followed by elution with methanol, separation of anionic and nonionic surfactants by anion exchange, quantitation by titration, and identification by 13C nuclear magnetic resonance spectrometry. Laboratory standards and field samples...
A study of metal ion adsorption at low suspended-solid concentrations
Cecily C.Y. Chang, J.A. Davis, James S. Kuwabara
1987, Estuarine, Coastal and Shelf Science (24) 419-424
A procedure for conducting adsorption studies at low suspended solid concentrations in natural waters (<50 mg l−1) is described. Methodological complications previously associated with such experiments have been overcome. Adsorption of zinc ion onto synthetic colloidal titania (TiO2) was studied as a function...
