Application of a source apportionment model in consideration of volatile organic compounds in an urban stream
W.E. Asher, W. Luo, K.W. Campo, D.A. Bender, K. W. Robinson, J.S. Zogorski, J. F. Pankow
2007, Environmental Toxicology and Chemistry (26) 1606-1613
Position-dependent concentrations of trichloroethylene and methyl-tert-butyl ether are considered for a 2.81-km section of the Aberjona River in Massachusetts, USA. This river flows through Woburn and Winchester (Massachusetts, USA), an area that is highly urbanized, has a long history of industrial activities dating to the early 1800s, and has gained...
Thioarsenates in geothermal waters of Yellowstone National Park: Determination, preservation, and geochemical importance
B. Planer-Friedrich, J. London, R. Blaine McCleskey, D. Kirk Nordstrom, D. Wallschlager
2007, Environmental Science & Technology (41) 5245-5251
Mono-, di-, tri-, and tetrathioarsenate, as well as methylated arsenic oxy- and thioanions, were determined besides arsenite and arsenate in geothermal waters of Yellowstone National Park using anion-exchange chromatography inductively coupled plasma mass spectrometry. Retention time match with synthetic standards, measured S:As ratios, and molecular electrospray mass spectra support the...
The importance of subsurface geology for water source and vegetation communities in Cherokee Marsh, Wisconsin
A.M. Kurtz, J.M. Bahr, Q. J. Carpenter, Randal J. Hunt
2007, Wetlands (27) 189-202
Restoration of disturbed wetland systems is an important component of wetland mitigation, yet uncertainty remains about how hydrologic processes affect biologic processes and wetlands patterns. To design more effective restoration strategies and re-establish native plant communities in disturbed wetlands, it is imperative to understand undisturbed systems. A site within Cherokee...
The importance of shallow confining units to submarine groundwater flow
J.F. Bratton
2007, Conference Paper, IAHS-AISH Publication
In addition to variable density flow, the lateral and vertical heterogeneity of submarine sediments creates important controls on coastal aquifer systems. Submarine confining units produce semi-confined offshore aquifers that are recharged on shore. These low-permeability deposits are usually either late Pleistocene to Holocene in age, or date to the period...
Effects of habitat management treatments on plant community composition and biomass in a Montane wetland
Jane E. Austin, Janet R. Keough, W.H. Pyle
2007, Wetlands (27) 570-587
Grazing and burning are commonly applied practices that can impact the diversity and biomass of wetland plant communities. We evaluated the vegetative response of wetlands and adjacent upland grasslands to four treatment regimes (continuous idle, fall prescribed burning followed by idle, annual fall cattle grazing, and rotation of summer grazing...
Organic contaminants in onsite wastewater treatment systems
K.E. Conn, R.L. Siegrist, L. B. Barber, G.K. Brown
2007, Conference Paper, ASABE - Individual and Small Community Sewage Systems XI, Proceedings of the 11th National Symposium
Wastewater from thirty onsite wastewater treatment systems was sampled during a reconnaissance field study to quantify bulk parameters and the occurrence of organic wastewater contaminants including endocrine disrupting compounds in treatment systems representing a variety of wastewater sources and treatment processes and their receiving environments. Bulk parameters ranged in concentrations...
Effects of pitfall trap preservative on collections of carabid beetles (Coleoptera: Carabidae)
K.W. McCravy, J.E. Willand
2007, Great Lakes Entomologist (40) 154-165
Effects of six pitfall trap preservatives (5% acetic acid solution, distilled water, 70% ethanol, 50% ethylene glycol solution, 50% propylene glycol solution, and 10% saline solution) on collections of carabid beetles (Coleoptera: Carabidae) were studied in a west-central Illinois deciduous forest from May to October 2005. A total of 819...
Geothermometer calculations for geothermal assessment
M.J. Reed, Robert H. Mariner
2007, Conference Paper, Transactions - Geothermal Resources Council
Geothermal exploration programs have relied on the calculation of geothermometers from hot spring chemistry as an early estimation of geothermal reservoir temperatures. Calibration of the geothermometers has evolved from experimental determinations of mineral solubility as a function of temperature to calibration from analyses of water chemistry from known depths and...
Multi-channel resistivity investigations of the freshwater-saltwater interface: A new tool to study an old problem
P.W. Swarzenski, S. Kruse, C. Reich, W.V. Swarzenski
2007, Conference Paper
It has been well established that fresh or brackish groundwater can exist both near and far from shore in many coastal and marine environments. The often permeable nature of marine sediments and the underlying bedrock provides abundant pathways for submarine groundwater discharge. While submarine groundwater discharge as a coastal hydrogeological...
Temporal variability of submarine groundwater discharge: Assessments via radon and seep meters, the southern carmel coast, Israel
Y. Weinstein, Y. Shalem, W. C. Burnett, P.W. Swarzenski, B. Herut
2007, Conference Paper, IAHS-AISH Publication
Seep meter data from Dor Bay, Israel, showed a steady decrease in submarine groundwater discharge (SGD) rates between March and July 2006 (averages of 34, 10.4 and 1.5 cm d-1 in March, May and July, respectively), while estimates based on radon time series showed remarkably uniform averages (8 cm d-1)....
Trends in the occurrence of MTBE in drinking water in the Northeast United States
M.J. Moran
2007, Conference Paper, Ground Water Management - Petroleum Hydrocarbons and Organic Chemicals in Ground Water: Prevention, Assessment, and Remediation Conf
Public water systems in Connecticut, Maine, Maryland, New Hampshire, New Jersey, and Rhode Island sampled treated drinking water from 1993-2006 and analyzed the samples for MTBE. The US Geological Survey examined trends in the occurrence of MTBE in drinking water derived from ground water in these States for two near-decadal...
Effects of capillarity and microtopography on wetland specific yield
D. M. Sumner
2007, Wetlands (27) 693-701
Hydrologic models aid in describing water flows and levels in wetlands. Frequently, these models use a specific yield conceptualization to relate water flows to water level changes. Traditionally, a simple conceptualization of specific yield is used, composed of two constant values for above- and below-surface water levels and neglecting the...
Sandhill crane abundance and nesting ecology at Grays Lake, Idaho
J. E. Austin, A.R. Henry, I.J. Ball
2007, Journal of Wildlife Management (71) 1067-1079
We examined population size and factors influencing nest survival of greater sandhill cranes (Grus canadensis tabida) at Grays Lake National Wildlife Refuge, Idaho, USA, during 1997-2000. Average local population of cranes from late April to early May, 1998-2000, was 735 cranes, 34% higher than that reported for May 1970-1971. We...
Landscape controls on mercury in streamwater at Acadia National Park, USA
J.M. Peckenham, J. S. Kahl, S.J. Nelson, K.B. Johnson, T.A. Haines
2007, Environmental Monitoring and Assessment (126) 97-104
Fall and spring streamwater samples were analyzed for total mercury (Hg) and major ions from 47 locations on Mount Desert Island in Maine. Samples were collected in zones that were burned in a major wildfire in 1947 and in zones that were not burned. We hypothesized that Hg concentrations in...
Reactivation of a cryptobiotic stream ecosystem in the McMurdo Dry Valleys, Antarctica: A long-term geomorphological experiment
Diane M. McKnight, C. M. Tate, E.D. Andrews, D.K. Niyogi, K. Cozzetto, K. Welch, W.B. Lyons, D.G. Capone
2007, Geomorphology (89) 186-204
The McMurdo Dry Valleys of Antarctica contain many glacial meltwater streams that flow for 6 to 12??weeks during the austral summer and link the glaciers to the lakes on the valley floors. Dry valley streams gain solutes longitudinally through weathering reactions and microbial processes occurring in the hyporheic zone. Some...
The influence of major dams on hydrology through the drainage network of the Sacramento River basin, California
M.B. Singer
2007, River Research and Applications (23) 55-72
This paper reports basinwide patterns of hydrograph alteration via statistical and graphical analysis from a network of long-term streamflow gauges located various distances downstream of major dams and confluences in the Sacramento River basin in California, USA. Streamflow data from 10 gauging stations downstream of major dams were divided into...
Impacts of waste from concentrated animal feeding operations on water quality
J. Burkholder, B. Libra, P. Weyer, S. Heathcote, D. Kolpin, P.S. Thorne, M. Wichman
2007, Environmental Health Perspectives (115) 308-312
Waste from agricultural livestock operations has been a long-standing concern with respect to contamination of water resources, particularly in terms of nutrient pollution. However, the recent growth of concentrated animal feeding operations (CAFOs) presents a greater risk to water quality because of both the increased volume of waste and to...
Thermal, chemical, and optical properties of Crater Lake, Oregon
G.L. Larson, R.L. Hoffman, D. C. McIntire, M.W. Buktenica, S.F. Girdner
2007, Hydrobiologia (574) 69-84
Crater Lake covers the floor of the Mount Mazama caldera that formed 7700 years ago. The lake has a surface area of 53 km2 and a maximum depth of 594 m. There is no outlet stream and surface inflow is limited to small streams and springs. Owing to its great...
Persistent mortality of brook trout in episodically acidified streams of the Southwestern Adirondack Mountains, New York
Barry P. Baldigo, G. Lawrence, H. Simonin
2007, Transactions of the American Fisheries Society (136) 121-134
Water chemistry, discharge, and mortality of caged brook trout Salvelinus fontinalis were characterized in six headwater streams in the southwestern Adirondack Mountains of New York during spring 2001-2003. Results were compared with mortality recorded during similar tests during 1984-1985, 1988-1990, and 1997 to assess contemporary relations between stream acidification and...
Associations of decadal to multidecadal sea-surface temperature variability with Upper Colorado River flow
G.J. McCabe, J.L. Betancourt, H.G. Hidalgo
2007, Journal of the American Water Resources Association (43) 183-192
The relations of decadal to multidecadal (D2M) variability in global sea-surface temperatures (SSTs) with D2M variability in the flow of the Upper Colorado River Basin (UCRB) are examined for the years 1906-2003. Results indicate that D2M variability of SSTs in the North Atlantic, North Pacific, tropical Pacific, and Indian Oceans...
Management of fluid mud in estuaries, bays, and lakes. II: Measurement, modeling, and management
W.H. McAnally, A. Teeter, David H. Schoellhamer, C. Friedrichs, D. Hamilton, E. Hayter, P. Shrestha, H. Rodriguez, A. Sheremet, R. Kirby
2007, Journal of Hydraulic Engineering (133) 23-38
Techniques for measurement, modeling, and management of fluid mud are available, but research is needed to improve them. Fluid mud can be difficult to detect, measure, or sample, which has led to new instruments and new ways of using existing instruments. Multifrequency acoustic fathometers sense neither density...
Multiobjective analysis of a public wellfield using artificial neural networks
E.A. Coppola Jr., F. Szidarovszky, D. Davis, S. Spayd, M.M. Poulton, E. Roman
2007, Ground Water (45) 53-61
As competition for increasingly scarce ground water resources grows, many decision makers may come to rely upon rigorous multiobjective techniques to help identify appropriate and defensible policies, particularly when disparate stakeholder groups are involved. In this study, decision analysis was conducted on a public water supply wellfield to balance water...
Acid rain effects on aluminum mobilization clarified by inclusion of strong organic acids
G.B. Lawrence, J.W. Sutherland, C.W. Boylen, S. W. Nierzwicki-Bauer, B. Momen, Barry P. Baldigo, H. A. Simonin
2007, Environmental Science & Technology (41) 93-98
Assessments of acidic deposition effects on aquatic ecosystems have often been hindered by complications from naturally occurring organic acidity. Measurements of pH and ANCG, the most commonly used indicators of chemical effects, can be substantially influenced by the presence of organic acids. Relationships between pH and inorganic Al, which is...
Origin and emplacement of impactites in the Chesapeake Bay impact structure, Virginia, USA
J. Wright Horton, Jr., Gregory Gohn, David S. Powars, Lucy E. Edwards
2007, Special Paper of the Geological Society of America 73-97
The late Eocene Chesapeake Bay impact structure, located on the Atlantic margin of Virginia, may be Earth's best-preserved large impact structure formed in a shallow marine, siliciclastic, continental-shelf environment. It has the form of an inverted...
Predicting Secchi disk depth from average beam attenuation in a deep, ultra-clear lake
G.L. Larson, R.L. Hoffman, B.R. Hargreaves, R.W. Collier
2007, Hydrobiologia (574) 141-148
We addressed potential sources of error in estimating the water clarity of mountain lakes by investigating the use of beam transmissometer measurements to estimate Secchi disk depth. The optical properties Secchi disk depth (SD) and beam transmissometer attenuation (BA) were measured in Crater Lake (Crater Lake National Park, Oregon, USA)...
