Effects and processes that can modify apparent CFC age
P. Cook, L.N. Plummer, D. K. Solomon, Eurybiades Busenberg, L. F Han
2006, Book chapter, Chlorofluorocarbons in hydrology: A guidebook
No abstract available. ...
Groundwater modeling
Leonard F. Konikow, Thomas E. Reilly, Paul M. Barlow, Clifford I. Voss
J.W. Delleur, editor(s)
2006, Book chapter, The handbook of groundwater engineering
No abstract available....
Models of groundwater ages and residence times
D. K. Solomon, L.N. Plummer, Eurybiades Busenberg, P.G. Cook
2006, Book chapter, Use of chlorofluorocarbons in hydrology: guidebook
No abstract available. ...
Practical application of CFCs in hydrological investigations
D. K. Solomon, L.N. Plummer, Eurybiades Busenberg, P.G. Cook
2006, Book chapter, Use of chlorofluorocarbons in hydrology: A guidebook
No abstract available. ...
Attention of arsenic in Bangladesh sediments: Implications for ground-water development
A. H. Welch, Kenneth G. Stollenwerk, George N. Breit, A. L. Foster, J. C. Yount, J.W. Whitney, M.N. Uddin, A.M. Alam
2006, Book chapter, Managing arsenic in the environment: From soil to human health
No abstract available....
From agricultural geology to hydropedology: Forging links within the twenty-first-century geoscience community
E. R. Landa
Frossard E.Blum W.E.H.Warkentin B.P., editor(s)
2006, Geological Society Special Publication 133-140
Despite historical linkages, the fields of geology and soil science have developed along largely divergent paths in the United States during much of the mid- to late-twentieth century. The shift in recent decades within both disciplines, towards greater emphasis on environmental-quality issues and a systems approach, has created new opportunities...
Tracermodel1- Excel workbook for calculation and presentation of environmental tracer data for simple groundwater mixtures: Use of chlorofluorocarbons in hydrology - a guidebook; Section III.10.3
J.K. Bohlke
2006, Report
Atmospheric environmental tracers commonly used to date groundwater on timescales of years to decades include CFC-11, CFC-12, CFC-113, SF6, 85Kr, 3 H and 3 H/3 H0 , where 3 H0 refers to initial tritium (3 H + tritiogenic 3 He) (Cook and Herczeg, 2000). Interpretation of age from environmental tracer...
Reply to comment on ‘Characterization of surface and ground water δ18O seasonal variation and its use for estimating groundwater residence times’ by R. E. Criss and W. E. Winston
Michael M. Reddy, Paul Schuster, Carol Kendall, Micaela B. Reddy
2006, Hydrological Processes (20) 3573-3578
No abstract available ...
Arsenic and selenium in microbial metabolism
John F. Stolz, Partha Basu, Joanne M. Santini, Ronald S. Oremland
2006, Annual Review of Microbiology (60) 107-130
Arsenic and selenium are readily metabolized by prokaryotes, participating in a full range of metabolic functions including assimilation, methylation, detoxification, and anaerobic respiration. Arsenic speciation and mobility is affected by microbes through oxidation/reduction reactions as part of resistance and respiratory processes. A robust arsenic cycle has been demonstrated in diverse...
Extracellular and intracellular uptake of zinc in a photosynthetic biofilm matrix:
J.M. Morris, J.S. Meyer
2006, Bulletin of Environmental Contamination and Toxicology (77) 30-35
No abstract available....
Changes in organic matter biodegradatility influencing sulfate reduction in an aquifer contaminated by landfill leachate
Steve H. Harris Jr., Jonathan D. Istok, Joseph M. Suflita
2006, Microbial Ecology (51) 535-542
In situ experiments were conducted to measure sulfate reduction rates and identify rate-limiting factors in a shallow, alluvial aquifer contaminated with municipal landfill leachate. Single-well, push–pull tests conducted in a well adjacent to the landfill with >8 mM dissolved organic carbon (DOC) exhibited a sulfate reduction rate of 3.2 μmol...
Control of invasive weeds with prescribed burning
Joseph M. DiTomaso, Matthew L. Brooks, Edith B. Allen, Ralph Minnich, Peter M. Rice, Guy B. Kyser
2006, Weed Technology (20) 535-548
Prescribed burning has primarily been used as a tool for the control of invasive late-season annual broadleaf and grass species, particularly yellow starthistle, medusahead, barb goatgrass, and several bromes. However, timely burning of a few invasive biennial broadleaves (e.g., sweetclover and garlic mustard), perennial grasses (e.g., bluegrasses and smooth brome),...
Michigan Water Year 2005
S. P. Blumer, C.R. Whited, J.M. Ellis, R. J. Minnerick, R.L. LeuVoy
2006, Water Resources Data MI-05-1
This volume of the annual hydrologic data report of Michigan is one of a series of annual reports that document hydrologic data gathered from the U.S. Geological Survey's surface- and ground-water data-collection networks in each state, Puerto Rico, and the Trust Territories. These records of streamflow, ground-water levels, and quality...
Hydroecological modeling of the Lower Missouri River
H.E. Johnson, R. B. Jacobson, A. J. DeLonay
2006, Conference Paper, Proceedings of the third federal interagency hydrologic modeling conference
No abstract avaikable ...
Coastal groundwater/surface-water interactions: a Great Lakes case study
Brian P. Neff, Sheridan K. Haack, Donald O. Rosenberry, Jacqueline F. Savino, Scott C. Lundstrom
2006, Book chapter, Coastal hydrology and processes
Key similarities exist between marine and Great Lakes coastal environments. Water and nutrient fluxes across lakebeds in the Great Lakes are influenced by seiche and wind set-up and set-down, analogous to tidal influence in marine settings. Groundwater/surface-water interactions also commonly involve a saline-fresh water interface, although in the Great-Lakes cases,...
Ecological values of shallow-water habitats: Implications for the restoration of disturbed ecosystems
C.B. Lopez, J. E. Cloern, T.S. Schraga, A.J. Little, L.V. Lucas, J.K. Thompson, J.R. Burau
2006, Ecosystems (9) 422-440
A presumed value of shallow-habitat enhanced pelagic productivity derives from the principle that in nutrient-rich aquatic systems phytoplankton growth rate is controlled by light availability, which varies inversely with habitat depth. We measured a set of biological indicators across the gradient of habitat depth within the Sacramento–San Joaquin River...
Groundwater-surface water interaction in the riparian zone of an incised channel, Walnut Creek, Iowa
K. E. Schilling, Z. Li, Y.-K. Zhang
2006, Journal of Hydrology (327) 140-150
Riparian zones of many incised channels in agricultural regions are cropped to the channel edge leaving them unvegetated for large portions of the year. In this study we evaluated surface and groundwater interaction in the riparian zone of an incised stream during a spring high flow period using detailed stream...
Processes affecting transport of uranium in a suboxic aquifer
J.A. Davis, G.P. Curtis, M.J. Wilkins, M. Kohler, P. Fox, D. L. Naftz, J.R. Lloyd
2006, Physics and Chemistry of the Earth (31) 548-555
At the Naturita site in Colorado, USA, groundwaters were sampled and analyzed for chemical composition and by culture and culture-independent microbiological techniques. In addition, sediments were extracted with a dilute sodium carbonate solution to determine quantities of labile <a...
Application of environmental tracers to mixing, evolution, and nitrate contamination of ground water in Jeju Island, Korea
D.-C. Koh, Niel Plummer, Solomon D. Kip, E. Busenberg, Y.-J. Kim, H.-W. Chang
2006, Journal of Hydrology (327) 258-275
Tritium/helium-3 (3H/3He) and chlorofluorocarbons (CFCs) were investigated as environmental tracers in ground water from Jeju Island (Republic of Korea), a basaltic volcanic island. Ground-water mixing was evaluated by comparing 3H and CFC-12 concentrations with lumped-parameter dispersion models, which distinguished old water recharged before the 1950s...
Dissimilatory arsenate and sulfate reduction in sediments of two hypersaline, arsenic-rich soda lakes: Mono and Searles Lakes, California
T.R. Kulp, S.E. Hoeft, L.G. Miller, C. Saltikov, J.N. Murphy, S. Han, B. Lanoil, R.S. Oremland
2006, Applied and Environmental Microbiology (72) 6514-6526
A radioisotope method was devised to study bacterial respiratory reduction of arsenate in sediments. The following two arsenic-rich soda lakes in California were chosen for comparison on the basis of their different salinities: Mono Lake (∼90 g/liter) and Searles Lake (∼340 g/liter). Profiles of arsenate reduction...
Larval exposure to environmentally relevant mixtures of alkylphenolethoxylates reduces reproductive competence in male fathead minnows
T.J. Bistodeau, L. B. Barber, S.E. Bartell, R.A. Cediel, K.J. Grove, J. Klaustermeier, J.C. Woodard, K. E. Lee, H.L. Schoenfuss
2006, Aquatic Toxicology (79) 268-277
The ubiquitous presence of nonylphenolethoxylate/octylphenolethoxylate (NPE/OPE) compounds in aquatic environments adjacent to wastewater treatment plants (WWTP) warrants an assessment of the endocrine disrupting potential of these complex mixtures on aquatic vertebrates. In this study, fathead minnow larvae were exposed for 64 days to a...
Analysis of a mesoscale infiltration and water seepage test in unsaturated fractured rock: Spatial variabilities and discrete fracture patterns
Q. Zhou, R. Salve, H.-H. Liu, J.S.Y. Wang, D. Hudson
2006, Journal of Contaminant Hydrology (87) 96-122
A mesoscale (21??m in flow distance) infiltration and seepage test was recently conducted in a deep, unsaturated fractured rock system at the crossover point of two underground tunnels. Water was released from a 3??m ?? 4??m infiltration plot on the floor of an alcove in the upper tunnel, and seepage...
Modeling effects of multinode wells on solute transport
Leonard F. Konikow, G.Z. Hornberger
2006, Ground Water (44) 648-660
Long-screen wells or long open boreholes with intraborehole flow potentially provide pathways for contaminants to move from one location to another in a ground water flow system. Such wells also can perturb a flow field so that the well will not provide water samples that are representative of ground water...
The composite method: An improved method for stream-water solute load estimation
Brent T. Aulenbach, R. P. Hooper
2006, Hydrological Processes (20) 3029-3047
The composite method is an alternative method for estimating stream-water solute loads, combining aspects of two commonly used methods: the regression-model method (which is used by the composite method to predict variations in concentrations between collected samples) and a period-weighted approach (which is used by the composite method to apply...
The giant Carlin gold province: A protracted interplay of orogenic, basinal, and hydrothermal processes above a lithospheric boundary
P. Emsbo, D.I. Groves, A. H. Hofstra, F.P. Bierlein
2006, Mineralium Deposita (41) 517-525
Northern Nevada hosts the only province that contains multiple world-class Carlin-type gold deposits. The first-order control on the uniqueness of this province is its anomalous far back-arc tectonic setting over the rifted North American paleocontinental margin that separates Precambrian from Phanerozoic subcontinental lithospheric mantle. Globally, most other significant gold provinces...
