Freshwater-saltwater transition zone movement during aquifer storage and recovery cycles in Brooklyn and Queens, New York City, USA
Paul E. Misut, Clifford I. Voss
2007, Journal of Hydrology (337) 87-103
Freshwater storage in deep aquifers of Brooklyn and Queens, New York, USA, is under consideration as an emergency water supply for New York City. The purpose of a New York City storage and recovery system is to provide an emergency water supply during times of drought or other contingencies and...
Suspended sediment and sediment-associated contaminants in San Francisco Bay
D. H. Schoellhamer, T.E. Mumley, J.E. Leatherbarrow
2007, Environmental Research (105) 119-131
Water-quality managers desire information on the temporal and spatial variability of contaminant concentrations and the magnitudes of watershed and bed-sediment loads in San Francisco Bay. To help provide this information, the Regional Monitoring Program for Trace Substances in the San Francisco Estuary (RMP) takes advantage of the association of many contaminants with sediment particles...
Fate and identification of oil-brine contamination in different hydrogeologic settings
Donald O. Whittemore
2007, Applied Geochemistry (22) 2099-2114
Past disposal of oil-field brine at the surface has caused substantial contamination of water resources in Kansas. Natural saline water occurs in and discharges from Permian bedrock in parts of the state, and other anthropogenic sources of saline water exist, requiring clear identification of different sources. Time-series analysis of Cl-...
Survival of wood duck ducklings and broods in Mississippi and Alabama
J. B. Davis, R. R. Cox Jr., R.M. Kaminski, B.D. Leopold
2007, Journal of Wildlife Management (71) 507-517
Although North American wood ducks (Aix sponsa) are well-studied throughout their range, researchers know little about demographic and environmental factors influencing survival of ducklings and broods, which is necessary information for population management. We studied radiomarked female and duckling wood ducks that used nest boxes and palustrine wetlands at Noxubee...
U/Th series radionuclides as coastal groundwater tracers
P.W. Swarzenski
2007, Chemical Reviews (107) 663-674
The study of coastal groundwater has recently surfaced as an active interdisciplinary area of research, driven foremost by its importance as a poorly quantified pathway for subsurface material transport into coastal ecosystems. Key issue in coastal groundwater research include a complete geochemical characterization of the groundwater(s); quantification of the kinetics...
A regression model to estimate regional ground water recharge
D. L. Lorenz, G. N. Delin
2007, Ground Water (45) 196-208
A regional regression model was developed to estimate the spatial distribution of ground water recharge in subhumid regions. The regional regression recharge (RRR) model was based on a regression of basin-wide estimates of recharge from surface water drainage basins, precipitation, growing degree days (GDD), and average basin specific yield (SY)....
Evaluating nephrotoxicity of high-molecular-weight organic compounds in drinking water from lignite aquifers
J.E. Bunnell, C. A. Tatu, H.E. Lerch, W. H. Orem, N. Pavlovic
2007, Journal of Toxicology and Environmental Health, Part A (70) 2089-2091
High-molecular-weight organic compounds such as humic acids and/or fulvic acids that are naturally mobilized from lignite beds into untreated drinking-water supplies were suggested as one possible cause of Balkan endemic nephropathy (BEN) and cancer of the renal pelvis. A lab investigation was undertaken in order to assess the nephrotoxic potential...
Remote sensing of particle backscattering in Chesapeake Bay: a 6-year SeaWiFS retrospective view
D.G. Zawada, C. Hu, T. Clayton, Z. Chen, J. C. Brock, F. E. Muller-Karger
2007, Estuarine, Coastal and Shelf Science (73) 792-806
Traditional field techniques to monitor water quality in large estuaries, such as boat-based surveys and autonomous moored sensors, generally provide limited spatial coverage. Satellite imagery potentially can be used to address both of these limitations. Here, we show that satellite-based observations are useful for inferring total-suspended-solids (TSS) concentrations in estuarine...
Effects of Hurricanes Katrina and Rita on the chemistry of bottom sediments in Lake Pontchartrain, La.
Peter C. Van Metre, Arthur J. Horowitz, Barbara Mahler, William T. Foreman, Christopher C. Fuller, Mark R. Burkhardt, Kent A. Elrick, Edward T. Furlong, Stanley C. Skrobialowski, James J. Smith, Jennifer T. Wilson, Stephen D. Zaugg
2007, Circular 1306-7F
Concerns about the effect of pumping contaminated flood waters into Lake Pontchartrain following the hurricanes of 2005 prompted the U.S. Geological Survey (USGS) to sample street mud, canal-suspended sediment, and bottom sediment in Lake Pontchartain. The samples were analyzed for a wide variety of potential inorganic and organic contaminants. Results...
Evidence for and implications of sedimentary diapirism and mud volcanism in the southern Utopia highland-lowland boundary plain, Mars
James A. Skinner, Kenneth L. Tanaka
2007, Icarus (186) 41-59
Several types of spatially associated landforms in the southern Utopia Planitia highland–lowland boundary (HLB) plain appear to have resulted from localized geologic activity, including (1) fractured rises, (2) elliptical mounds, (3) pitted cones with emanating lobate materials, and (4) isolated and coalesced cavi (depressions). Stratigraphic analysis indicates these features are Hesperian or...
Long-term limnological research and monitoring at Crater Lake, Oregon
G.L. Larson, R. Collier, M. Buktenica
2007, Hydrobiologia (574) 1-11
Crater Lake is located in the caldera of Mount Mazama in Crater Lake National Park, Oregon. The lake has a surface area of about 53 km2at an elevation of 1882 m and a maximum depth of 594 m. Limited studies of this ultraoligotrophic lake conducted between 1896 and 1981, lead...
Distribution and abundance of zooplankton populations in Crater Lake, Oregon
G.L. Larson, C. D. McIntire, M.W. Buktenica, S.F. Girdner, R.E. Truitt
2007, Hydrobiologia (574) 217-233
The zooplankton assemblages in Crater Lake exhibited consistency in species richness and general taxonomic composition, but varied in density and biomass during the period between 1988 and 2000. Collectively, the assemblages included 2 cladoceran taxa and 10 rotifer taxa (excluding rare taxa). Vertical habitat partitioning of the water column to...
Environmental impact of Hurricane Katrina on Lake Pontchartrain
Thomas Heitmuller, Brian C. Perez
2007, Circular 1306-7G
Hurricane Katrina slammed the Louisiana-Mississippi Gulf Coast with 135-mi/hour (217-km/hour) winds and up to a 30-ft (9-m) storm surge. Lake Pontchartrain was further subjected to environmental threat by way of the millions of gallons of contaminated flood water that were pumped daily from the city of New Orleans into the...
Monitoring Hurricane Rita Inland Storm Surge
Benton D. McGee, Roland W. Tollett, Burl B. Goree
2007, Circular 1306-7J
Pressure transducers (sensors) are accurate, reliable, and cost-effective tools to measure and record the magnitude, extent, and timing of hurricane storm surge. Sensors record storm-surge peaks more accurately and reliably than do high-water marks. Data collected by sensors may be used in storm-surge models to estimate when, where, and to...
Temporal changes in surface-water insecticide concentrations after the phaseout of diazinon and chlorpyrifos
P. J. Phillips, S.W. Ator, E.A. Nystrom
2007, Environmental Science & Technology (41) 4246-4251
The recent (late 2001) federally mandated phaseout of diazinon and chlorpyrifos insecticide use in outdoor urban settings has resulted in a rapid decline in concentrations of these insecticides in urban streams and rivers in the northeastern and midwestern United States. Assessment of temporal insecticide trends at 20 sites showed that...
Seasonal nutrient and plankton dynamics in a physical-biological model of Crater Lake
K. Fennel, R. Collier, G. Larson, G. Crawford, E. Boss
2007, Hydrobiologia (574) 265-280
A coupled 1D physical-biological model of Crater Lake is presented. The model simulates the seasonal evolution of two functional phytoplankton groups, total chlorophyll, and zooplankton in good quantitative agreement with observations from a 10-year monitoring study. During the stratified period in summer and early fall the model displays a marked...
The role of ground water in generating streamflow in headwater areas and in maintaining base flow
T. C. Winter
2007, Journal of the American Water Resources Association (43) 15-25
The volume and sustainability of streamflow from headwaters to downstream reaches commonly depend on contributions from ground water. Streams that begin in extensive aquifers generally have a stable point of origin and substantial discharge in their headwaters. In contrast, streams that begin as discharge from rocks or sediments having low...
Pumping-induced drawdown and stream depletion in a leaky aquifer system
J.J. Butler Jr., X. Zhan, V.A. Zlotnik
2007, Ground Water (45) 178-186
The impact of ground water pumping on nearby streams is often estimated using analytic models of the interconnected stream-aquifer system. A common assumption of these models is that the pumped aquifer is underlain by an impermeable formation. A new semianalytic solution for drawdown and stream depletion has been developed that...
On the influence of substrate morphology and surface area on phytofauna
S. Becerra-Munoz, H.L. Schramm Jr.
2007, Hydrobiologia (575) 117-128
The independent effects and interactions between substrate morphology and substrate surface area on invertebrate density or biomass colonizing artificial plant beds were assessed in a clear-water and a turbid playa lake in Castro County, Texas, USA. Total invertebrate density and biomass were consistently greater on filiform substrates than on laminar...
Assessment of fecal pollution sources in a small northern-plains watershed using PCR and phylogenetic analyses of Bacteroidetes 16S rRNA gene
R. Lamendella, J.W.S. Domingo, D.B. Oerther, J. R. Vogel, D. M. Stoeckel
2007, FEMS Microbiology Ecology (59) 651-660
We evaluated the efficacy, sensitivity, host-specificity, and spatial/temporal dynamics of human- and ruminant-specific 16S rRNA gene Bacteroidetes markers used to assess the sources of fecal pollution in a fecally impacted watershed. Phylogenetic analyses of 1271 fecal and environmental 16S rRNA gene clones were also performed to study the diversity of...
Evasion of added isotopic mercury from a northern temperate lake
G. Southworth, S. Lindberg, H. Hintelmann, M. Amyot, A. Poulain, M. Bogle, M. Peterson, J. Rudd, R. Harris, K. Sandilands, David P. Krabbenhoft, Mark L. Olsen
2007, Environmental Toxicology and Chemistry (26) 53-60
Isotopically enriched Hg (90% 202Hg) was added to a small lake in Ontario, Canada, at a rate equivalent to approximately threefold the annual direct atmospheric deposition rate that is typical of the northeastern United States. The Hg spike was thoroughly mixed into the epilimnion in nine separate events at two-week...
Origin of pingo-like features on the Beaufort Sea shelf and their possible relationship to decomposing methane gas hydrates
C. K. Paull, W. Ussler III, S.R. Dallimore, S.M. Blasco, T.D. Lorenson, H. Melling, B.E. Medioli, F.M. Nixon, F.A. McLaughlin
2007, Geophysical Research Letters (34)
[1] The Arctic shelf is currently undergoing dramatic thermal changes caused by the continued warming associated with Holocene sea level rise. During this transgression, comparatively warm waters have flooded over cold permafrost areas of the Arctic Shelf. A thermal pulse of more than 10°C is still...
Nutrient (N, P) loads and yields at multiple scales and subbasin types in the Yukon River basin, Alaska
M.M. Dornblaser, Robert G. Striegl
2007, Journal of Geophysical Research G: Biogeosciences (112)
Loads and yields of dissolved and particulate nitrogen (N) and phosphorus (P) were measured and modeled at three locations on the Yukon River (YR) and on the Tanana and Porcupine Rivers in Alaska during 2001-2005. Total export of N and P upstream of Yukon Delta averaged 120 Gg N a-1...
Geologic characteristics of the central stretch of the Ticona Channel, north-central Illinois
B.A. Willems, D.H. Malone, A. Pugin
2007, Environmental Geosciences (14) 123-136
The Ticona Channel is located in north-central Illinois and occurs in Grundy, LaSalle, and Putnam counties. It is a buried bedrock valley that served as the principal paleodrainage system in north-central Illinois during the Illinoian and pre-Illinoian. This study focused on the part of the Ticona Channel within the Leonore...
Cross-shelf transport of pink shrimp larvae: Interactions of tidal currents, larval vertical migrations and internal tides
Maria M. Criales, Joan A. Browder, C.N.K. Mooers, M. B. Robblee, H. Cardenas, Thomas L. Jackson
2007, Marine Ecology Progress Series (345) 167-184
Transport and behavior of pink shrimp Farfantepenaeus duorarum larvae were investigated on the southwestern Florida (SWF) shelf of the Gulf of Mexico between the Dry Tortugas spawning grounds and Florida Bay nursery grounds. Stratified plankton samples and hydrographic data were collected at 2 h intervals at 3 stations located on a cross-shelf transect....
