Occurrence and removal of pharmaceutically active compounds in sewage treatment plants with different technologies
Guang-Guo Ying, Rai S. Kookana, Dana W. Kolpin
2009, Journal of Environmental Monitoring (11) 1498-1505
Occurrence of eight selected pharmaceutically active compounds (PhACs; caffeine, carbamazepine, triclosan, gemfibrozil, diclofenac, ibuprofen, ketoprofen and naproxen) were investigated in effluents from fifteen sewage treatment plants (STPs) across South Australia. In addition, a detailed investigation into the removal of these compounds was also carried out in four STPs with different...
Modeling lakes and reservoirs in the climate system
M.D. MacKay, P.J. Neale, C.D. Arp, L. N. De Senerpont Domis, X. Fang, G. Gal, K.D. Jo, G. Kirillin, J.D. Lenters, Elena Litchman, S. MacIntyre, P. Marsh, J. Melack, W.M. Mooij, F. Peeters, A. Quesada, S.G. Schladow, M. Schmid, C. Spence, S.L. Stokes
2009, Limnology and Oceanography (54)
Modeling studies examining the effect of lakes on regional and global climate, as well as studies on the influence of climate variability and change on aquatic ecosystems, are surveyed. Fully coupled atmosphere-land surface-lake climate models that could be used for both of these types of study simultaneously do not presently...
Order of functionality loss during photodegradation of aquatic humic substances
Kevin A. Thorn, Steven J. Younger, Larry G. Cox
2009, Journal of Environmental Quality (39) 1416-1428
The time course photodegradation of the Nordic aquatic fulvic and humic acids and Suwannee River XAD-4 acids subjected to UV irradiation with an unfiltered medium pressure mercury lamp was studied by liquid-state 13C nuclear magnetic resonance. Photodecarboxylation was a significant pathway in all cases. Decreases in ketone, aromatic, and O-alkyl...
Mercury and drought along the Lower Carson River, Nevada: III. effects on blood and organ biochemistry and histopathology of snowy egrets and black-crowned night-herons on Lahontan Reservoir, 2002-2006
David J. Hoffman, Charles J. Henny, Elwood F. Hill, Robert A. Grove, James L. Kaiser, Katherine R. Stebbins
2009, Journal of Toxicology and Environmental Health, Part A (72) 1223-1241
A 10-year study (1997-2006) was conducted to evaluate reproduction and health of aquatic birds in the Carson River Basin of northwestern Nevada (on the U.S. Environmental Protection Agency Natural Priorities List) due to high mercury (Hg) concentrations from past mining activities. This part of the study evaluated physiological associations with...
Critical steps for the continuing advancement of hydrogeophysics
Ty P A Ferre, Laurence Bentley, Andrew Binley, Niklas Linde, Andreas Kemna, Kamini Singha, K. Holliger, J. A. Huisman, Burke J. Minsley
2009, Eos Science News (90) 200-202
Special hydrogeophysics issues published by hydrology and geophysics journals, special sessions and workshops at conferences, and an increasing number of short courses demonstrate the growing interest in the use of geophysics for hydrologic investigations. The formation of the hydrogeophysics technical subcommittee of AGU's Hydrology section adds further evidence of the...
Identifying baldcypress-water tupelo regeneration classes in forested wetlands of the Atchafalaya Basin, Louisiana
Stephen P. Faulkner, Prajwol Bhattarai, Yvonne C. Allen, John A. Barras, Glenn C. Constant
2009, Wetlands (29) 809-817
Baldcypress-water tupelo (cypress-tupelo) swamps are critically important coastal forested wetlands found throughout the southeastern U.S. The long-term survival and sustainability of these swamp forests is unknown due to large-scale changes in hydrologic regimes that prevent natural regeneration following logging or mortality. We used NWI wetland maps and remotely sensed hydrologic...
Hydrology and simulation of ground-water flow in the Tooele Valley ground-water basin, Tooele County, Utah
Bernard J. Stolp, Lynette E. Brooks
2009, Scientific Investigations Report 2009-5154
Ground water is the sole source of drinking water within Tooele Valley. Transition from agriculture to residential land and water use necessitates additional understanding of water resources. The ground-water basin is conceptualized as a single interconnected hydrologic system consisting of the consolidated-rock mountains and adjoining unconsolidated basin-fill valleys. Within the...
Benthic flux of nutrients and trace metals in the northern component of San Francisco Bay, California
James S. Kuwabara, Brent R. Topping, Francis Parcheso, Anita C. Engelstad, Valerie E. Greene
2009, Open-File Report 2009-1286
Two sets of sampling trips were coordinated in late summer 2008 (weeks of July 8 and August 6) to sample the interstitial and overlying bottom waters at 10 shallow locations (9 sites <3 meters in depth) within the northern component of the San Francisco Bay/Delta (herein referred to as North...
User's Guide to the Weighted-Multiple-Linear Regression Program (WREG version 1.0)
Ken Eng, Yin-Yu Chen, Julie.E. Kiang
2009, Techniques and Methods 4-A8
Streamflow is not measured at every location in a stream network. Yet hydrologists, State and local agencies, and the general public still seek to know streamflow characteristics, such as mean annual flow or flood flows with different exceedance probabilities, at ungaged basins. The goals of this guide are to introduce...
Geochemistry of standard mine waters, Gunnison County, Colorado, July 2009
Philip L. Verplanck, Andrew H. Manning, Jeffrey T. Graves, R. Blaine McCleskey, Todor I. Todorov, Paul J. Lamothe
2009, Open-File Report 2009-1292
In many hard-rock-mining districts water flowing from abandoned mine adits is a primary source of metals to receiving streams. Understanding the generation of adit discharge is an important step in developing remediation plans. In 2006, the U.S. Environmental Protection Agency listed the Standard Mine in the Elk Creek drainage basin...
Summary of Hydrologic Conditions in Georgia, 2008
Andrew E. Knaak, John K. Joiner, Michael F. Peck
2009, Fact Sheet 2009-3109
The United States Geological Survey (USGS) Georgia Water Science Center (WSC) maintains a long-term hydrologic monitoring network of more than 290 real-time streamgages, more than 170 groundwater wells, and 10 lake and reservoir monitoring stations. One of the many benefits of data collected from this monitoring network is that analysis...
Water Withdrawals, Use, and Trends in Florida, 2005
Richard L. Marella
2009, Scientific Investigations Report 2009-5125
In 2005, the total amount of water withdrawals in Florida was estimated at 18,359 million gallons per day (Mgal/d). Saline water accounted for 11,486 Mgal/d (63 percent), and freshwater accounted for 6,873 Mgal/d (37 percent). Groundwater accounted for 4,247 Mgal/d (62 percent) of freshwater withdrawals, and surface water accounted for...
Evaluation of catchment delineation methods for the medium-resolution National Hydrography Dataset
Craig M. Johnston, Thomas G. Dewald, Timothy R. Bondelid, Bruce B. Worstell, Lucinda D. McKay, Alan Rea, Richard B. Moore, Jonathan L. Goodall
2009, Scientific Investigations Report 2009-5233
Different methods for determining catchments (incremental drainage areas) for stream segments of the medium-resolution (1:100,000-scale) National Hydrography Dataset (NHD) were evaluated by the U.S. Geological Survey (USGS), in cooperation with the U.S. Environmental Protection Agency (USEPA). The NHD is a comprehensive set of digital spatial data that contains information about...
Using a coupled groundwater/surface-water model to predict climate-change impacts to lakes in the Trout Lake Watershed, northern Wisconsin
Randall J. Hunt, John F. Walker, Steven L. Markstrom, Lauren E. Hay, John Doherty
Richard M. T. Webb, Darius J. Semmens, editor(s)
2009, Conference Paper, Planning for an uncertain future - monitoring, integration, and adaptation (SIR 2009-5049)
A major focus of the U.S. Geological Survey’s Trout Lake Water, Energy, and Biogeochemical Budgets (WEBB) project is the development of a watershed model to allow predictions of hydrologic response to future conditions including land-use and climate change. The coupled groundwater/surface-water model GSFLOW was chosen for this purpose because it...
Predicting the natural flow regime: Models for assessing hydrological alteration in streams
D.M. Carlisle, J. Falcone, D.M. Wolock, M. R. Meador, R.H. Norris
2009, River Research and Applications (26) 118-136
Understanding the extent to which natural streamflow characteristics have been altered is an important consideration for ecological assessments of streams. Assessing hydrologic condition requires that we quantify the attributes of the flow regime that would be expected in the absence of anthropogenic modifications. The objective of this study was to...
Transport of tritium contamination to the atmosphere in an arid environment
C. Amanda Garcia, Brian J. Andraski, Michael J. Johnson, David A. Stonestrom, Robert L. Michel, C.A. Cooper, S.W. Wheatcraft
2009, Vadose Zone Journal (8) 450-461
Soil–plant–atmosphere interactions strongly influence water movement in desert unsaturated zones, but little is known about how such interactions affect atmospheric release of subsurface water-borne contaminants. This 2-yr study, performed at the U.S. Geological Survey's Amargosa Desert Research Site in southern Nevada, quantified the magnitude and spatiotemporal variability of tritium (3H)...
Fractionation of stable isotopes in perchlorate and nitrate during in situ biodegradation in a sandy aquifer
P.B. Hatzinger, John Karl Bohlke, N.C. Sturchio, B. Gu, L.J. Heraty, R.C. Borden
2009, Environmental Chemistry (6) 44-52
An in situ experiment was performed in a shallow alluvial aquifer in Maryland to quantify the fractionation of stable isotopes in perchlorate (Cl and O) and nitrate (N and O) during biodegradation. An emulsified soybean oil substrate that was previously injected into this aquifer provided the electron donor necessary for...
A simple technique for continuous measurement of time-variable gas transfer in surface waters
Craig R. Tobias, John Karl Bohlke, Judson W. Harvey, Eurybiades Busenberg
2009, Limnology and Oceanography: Methods (7) 185-195
Mass balance models of dissolved gases in streams, lakes, and rivers serve as the basis for estimating wholeecosystem rates for various biogeochemical processes. Rates of gas exchange between water and the atmosphere are important and error-prone components of these models. Here we present a simple and efficient modification of the...
Multi-scale measurements and modeling of denitrification in streams with varying flow and nitrate concentration in the upper Mississippi River basin, USA
J.K. Bohlke, Ronald C. Antweiler, Judson W. Harvey, Andrew E. Laursen, Lesley K. Smith, Richard L. Smith, Mary A. Voytek
2009, Biogeochemistry (93) 117-141
Denitrification is an important net sink for NO3− in streams, but direct measurements are limited and in situ controlling factors are not well known. We measured denitrification at multiple scales over a range of flow conditions and NO3− concentrations in streams draining agricultural land in the upper Mississippi River basin....
Geochemistry of inorganic nitrogen in waters released from coal-bed natural gas production wells in the Powder River Basin, Wyoming
Richard L. Smith, Deborah A. Repert, Charles P. Hart
2009, Environmental Science & Technology (43) 2348-2354
Water originating from coal-bed natural gas (CBNG) production wells typically contains ammonium and is often disposed via discharge to ephemeral channels. A study conducted in the Powder River Basin, Wyoming, documented downstream changes in CBNG water composition, emphasizing nitrogen-cycling processes and the fate of ammonium. Dissolved ammonium concentrations from 19...
Contaminants of emerging concern: Introduction to a featured collection
William A. Battaglin, Dana W. Kolpin
2009, Journal of the American Water Resources Association (45) 1-3
No abstract available....
Hydrodynamic control of phytoplankton loss to the benthos in an estuarine environment
Nicole L. Jones, Janet K. Thompson, Kevin R. Arrigo, Stephen G. Monismith
2009, Limnology and Oceanography (54) 952-969
Field experiments were undertaken to measure the influence of hydrodynamics on the removal of phytoplankton by benthic grazers in Suisun Slough, North San Francisco Bay. Chlorophyll a concentration boundary layers were found over beds inhabited by the active suspension feeders Corbula amurensis and Corophium alienense and the passive suspension feeders...
How electron flow controls contaminant dynamics
Thomas Borch, Kate M. Campbell, Ruben Kretzschmar
2009, Environmental Science & Technology (44) 3-6
No abstract available. ...
Linking hydraulic properties of fire-affected soils to infiltration and water repellency
John A. Moody, David Kinner, Xavier Ubeda
2009, Journal of Hydrology (379) 291-303
Heat from wildfires can produce a two-layer system composed of extremely dry soil covered by a layer of ash, which when subjected to rainfall, may produce extreme floods. To understand the soil physics controlling runoff for these initial conditions, we used a small, portable disk infiltrometer to measure two hydraulic...
Predictive Models of the Hydrological Regime of Unregulated Streams in Arizona
David W. Anning, John T.C. Parker
2009, Open-File Report 2009-1269
Three statistical models were developed by the U.S. Geological Survey in cooperation with the Arizona Department of Environmental Quality to improve the predictability of flow occurrence in unregulated streams throughout Arizona. The models can be used to predict the probabilities of the hydrological regime being one of four categories developed...
