Relative vulnerability of public supply wells to VOC contamination in hydrologically distinct regional aquifers
Leon J. Kauffman, Francis H. Chapelle
2010, Ground Water Monitoring and Remediation (30) 54-63
A process-based methodology was used to compare the vulnerability of public supply wells tapping seven study areas in four hydrologically distinct regional aquifers to volatile organic compound (VOC) contamination. This method considers (1) contributing areas and travel times of groundwater flowpaths converging at individual supply wells, (2) the oxic and/or...
The ecological limits of hydrologic alteration (ELOHA): A new framework for developing regional environmental flow standards
N.L. Poff, B. D. Richter, A.H. Arthington, S.E. Bunn, R.J. Naiman, E. Kendy, M. Acreman, C. Apse, B.P. Bledsoe, Mary C. Freeman, J. Henriksen, R. B. Jacobson, J.G. Kennen, D.M. Merritt, J. H. O’Keeffe, J. D. Olden, K. Rogers, R.E. Tharme, A. Warner
2010, Freshwater Biology (55) 147-170
The flow regime is a primary determinant of the structure and function of aquatic and riparian ecosystems for streams and rivers. Hydrologic alteration has impaired riverine ecosystems on a global scale, and the pace and intensity of human development greatly exceeds the ability of scientists to assess the effects on...
Snowmelt hydrograph interpretation: Revealing watershed scale hydrologic characteristics of the Yellowstone volcanic plateau
Gardner W. Payton, D. D. Susong, Solomon D. Kip, H. Heasler
2010, Journal of Hydrology (383) 209-222
Snowmelt hydrograph analysis and groundwater age dates of cool water springs on the Yellowstone volcanic plateau provide evidence of high volumes of groundwater circulation in watersheds comprised of quaternary Yellowstone volcanics. Ratios of maximum to minimum mean daily discharge and average recession indices are calculated for watersheds within and surrounding...
Distribution, behavior, and transport of inorganic and methylmercury in a high gradient stream
J.R. Flanders, R.R. Turner, T. Morrison, R. Jensen, J. Pizzuto, K. Skalak, R. Stahl
2010, Applied Geochemistry (25) 1756-1769
Concentrations of Hg remain elevated in physical and biological media of the South River (Virginia, USA), despite the cessation of the industrial use of Hg in its watershed nearly six decades ago, and physical characteristics that would not seem to favor Hg(II)-methylation. A 3-a study of inorganic Hg (IHg) and...
In situ measurements of volatile aromatic hydrocarbon biodegradation rates in groundwater
I.M. Cozzarelli, B.A. Bekins, R.P. Eganhouse, E. Warren, H.I. Essaid
2010, Journal of Contaminant Hydrology (111) 48-64
Benzene and alkylbenzene biodegradation rates and patterns were measured using an in situ microcosm in a crude-oil contaminated aquifer near Bemidji, Minnesota. Benzene-D6, toluene, ethylbenzene, o-, m- and p-xylenes and four pairs of C3- and C4-benzenes were added to an in situ microcosm and studied over a 3-year period. The...
Conceptual hierarchical modeling to describe wetland plant community organization
A.M. Little, G.R. Guntenspergen, T. F. H. Allen
2010, Wetlands (30) 55-65
Using multivariate analysis, we created a hierarchical modeling process that describes how differently-scaled environmental factors interact to affect wetland-scale plant community organization in a system of small, isolated wetlands on Mount Desert Island, Maine. We followed the procedure: 1) delineate wetland groups using cluster analysis, 2) identify differently scaled environmental...
Influence of organic matter on the transport of Cryptosporidium parvum oocysts in a ferric oxyhydroxide-coated quartz sand saturated porous medium
R.A. Abudalo, J. N. Ryan, Ronald W. Harvey, David W. Metge, Lee L. Landkamer
2010, Water Research (44) 1104-1113
To assess the effect of organic matter on the transport of Cryptosporidium parvum oocysts in a geochemically heterogeneous saturated porous medium, we measured the breakthrough and collision efficiencies of oocysts as a function of dissolved organic matter concentration in a flow-through column containing ferric oxyhydroxide-coated sand. We characterized the surface...
Mapping irrigated lands at 250-m scale by merging MODIS data and National Agricultural Statistics
Md Shahriar Pervez, Jesslyn F. Brown
2010, Remote Sensing (2) 2388-2412
Accurate geospatial information on the extent of irrigated land improves our understanding of agricultural water use, local land surface processes, conservation or depletion of water resources, and components of the hydrologic budget. We have developed a method in a geospatial modeling framework that assimilates irrigation statistics with remotely sensed parameters...
The spatial and temporal variability of groundwater recharge in a forested basin in northern Wisconsin
W. R. Dripps, K. R. Bradbury
2010, Hydrological Processes (24) 383-392
Recharge varies spatially and temporally as it depends on a wide variety of factors (e.g. vegetation, precipitation, climate, topography, geology, and soil type), making it one of the most difficult, complex, and uncertain hydrologic parameters to quantify. Despite its inherent variability, groundwater modellers, planners, and policy makers often ignore recharge...
The quixotic search for a comprehensive understanding of hydrologic response at the surface: Horton, Dunne, Dunton, and the role of concept-development simulation
K. Loague, C.S. Heppner, B.A. Ebel, J.E. VanderKwaak
2010, Hydrological Processes (24) 2499-2505
[No abstract available]...
Restoring Ecological Function to a Submerged Salt Marsh
C.L. Stagg, I.A. Mendelssohn
2010, Restoration Ecology (18) 10-17
Impacts of global climate change, such as sea level rise and severe drought, have altered the hydrology of coastal salt marshes resulting in submergence and subsequent degradation of ecosystem function. A potential method of rehabilitating these systems is the addition of sediment-slurries to increase marsh surface elevation, thus ameliorating effects...
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Hydrologic Landscape Regions
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-10
This tabular data set represents the area of Hydrologic Landscape Regions (HLR) compiled for every MRB_E2RF1 catchment of the Major River Basins (MRBs, Crawford and others, 2006). The source data set is a 100-meter version of Hydrologic Landscape Regions of the United States (Wolock, 2003). HLR groups watersheds on the...
Mortality of centrarchid fishes in the Potomac drainage: Survey results and overview of potential contributing factors
Vicki Blazer, Luke R. Iwanowicz, Clifford E. Starliper, Steven D. Zaugg, Mark R. Burkhardt, P. Barbash, J.D. Hedrick, S.J. Reeser, J.E. Mullican, J. Kelble
2010, Journal of Aquatic Animal Health (22) 190-218
Skin lesions and spring mortality events of smallmouth bass Micropterus dolomieu and selected other species were first noted in the South Branch of the Potomac River in 2002. Since that year morbidity and mortality have also been observed in the Shenandoah and Monocacy rivers. Despite much research, no single pathogen,...
Caution on the use of liquid nitrogen traps in stable hydrogen isotope-ratio mass spectrometry
Tyler B. Coplen, Haiping Qi
2010, Analytical Chemistry (82) 7849-7851
An anomalous stable hydrogen isotopic fractionation of 4 ‰ in gaseous hydrogen has been correlated with the process of adding liquid nitrogen (LN2) to top off the dewar of a stainless-steel water trap on a gaseous hydrogen-water platinum equilibration system. Although the cause of this isotopic fractionation is unknown, its...
Isotope reference materials
Tyler B. Coplen
2010, Book chapter, The encyclopedia of mass spectrometry
Measurement of the same isotopically homogeneous sample by any laboratory worldwide should yield the same isotopic composition within analytical uncertainty. International distribution of light element isotopic reference materials by the International Atomic Energy Agency and the U.S. National Institute of Standards and Technology enable laboratories to achieve this goal....
Water-budget methods
Richard W. Healy
2010, Book chapter, Estimating groundwater recharge
A water budget is an accounting of water movement into and out of, and storage change within, some control volume. Universal and adaptable are adjectives that reflect key features of water-budget methods for estimating recharge. The universal concept of mass conservation of water implies that water-budget methods are...
Ecological distribution and population physiology defined by proteomics in a natural microbial community
Ryan S. Mueller, Vincent J. Denef, Linda H. Kalnejais, K. Blake Suttle, Brian C. Thomas, Paul Wilmes, Richard L. Smith, D. Kirk Nordstrom, R. Blaine McCleskey, Menesh B. Shah, Nathan C. VerBekmoes, Robert L. Hettich, Jillian F. Banfield
2010, Molecular Systems Biology (6)
An important challenge in microbial ecology is developing methods that simultaneously examine the physiology of organisms at the molecular level and their ecosystem level interactions in complex natural systems. We integrated extensive proteomic, geochemical, and biological information from 28 microbial communities collected from an acid mine drainage environment and representing...
Predictive modeling of transient storage and nutrient uptake: Implications for stream restoration
Ben L. O’Connor, Miki Hondzo, Judson W. Harvey
2010, Journal of Hydraulic Engineering (136) 1018-1032
This study examined two key aspects of reactive transport modeling for stream restoration purposes: the accuracy of the nutrient spiraling and transient storage models for quantifying reach-scale nutrient uptake, and the ability to quantify transport parameters using measurements and scaling techniques in order to improve upon traditional conservative tracer fitting...
Novel silver tubing method for quantitative introduction of water into high temperature conversion systems for stable hydrogen and oxygen isotopic measurements
Haiping Qi, Manfred Groning, Tyler B. Coplen, Bryan Buck, Stanley J. Mroczkowski, Willi A. Brand, Heike Geilmann, Matthias Gehre
2010, Rapid Communications in Mass Spectrometry (24) 1821-1827
A new method to seal water in silver tubes for use in a TC/EA reduction unit using a semi-automated sealing apparatus can yield reproducibilities (1 standard deviation) of δ2H and &delta18O measurements of 1.0 ‰ and 0.06 ‰, respectively. These silver tubes containing reference waters may be preferred for calibration...
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: STATSGO Soil Characteristics
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-26
This tabular data set represents estimated soil variables compiled for every MRB_E2RF1 catchment of selected Major River Basins (MRBs, Crawford and others, 2006). The variables included are cation exchange capacity, percent calcium carbonate, slope, water-table depth, soil thickness, hydrologic soil group, soil erodibility (k-factor), permeability, average water capacity, bulk density,...
Three-dimensional benchmark for variable-density flow and transport simulation: matching semi-analytic stability modes for steady unstable convection in an inclined porous box
Clifford I. Voss, Craig T. Simmons, Neville I. Robinson
2010, Hydrogeology Journal (18) 5-23
This benchmark for three-dimensional (3D) numerical simulators of variable-density groundwater flow and solute or energy transport consists of matching simulation results with the semi-analytical solution for the transition from one steady-state convective mode to another in a porous box. Previous experimental and analytical studies of natural convective flow in an...
Summary of groundwater-recharge estimates for Pennsylvania
Stuart O. Reese, Dennis W. Risser
2010, Water Resource Report 70
Groundwater recharge is water that infiltrates through the subsurface to the zone of saturation beneath the water table. Because recharge is a difficult parameter to quantify, it is typically estimated from measurements of other parameters like streamflow and precipitation. This report provides a general overview of processes affecting recharge in...
Sap flux-scaled transpiration by tamarisk (Tamarix spp.) before, during and after episodic defoliation by the saltcedar leaf beetle (Diorhabda carinulata)
K. R. Hultine, P.L. Nagler, K. Morino, S.E. Bush, K.G. Burtch, P.E. Dennison, E. P. Glenn, J.R. Ehleringer
2010, Agricultural and Forest Meteorology (150) 1467-1475
The release of the saltcedar beetle (Diorhabda carinulata) has resulted in the periodic defoliation of tamarisk (Tamarix spp.) along more than 1000 river km in the upper Colorado River Basin and is expected to spread along many other river reaches throughout the upper basin, and possibly into the lower Colorado...
Improved hydrogeophysical characterization and monitoring through parallel modeling and inversion of time-domain resistivity andinduced-polarization data
Timothy C. Johnson, Roelof J. Versteeg, Andy Ward, Frederick D. Day-Lewis, André Revil
2010, Geophysics (75) WA27-WA41
Electrical geophysical methods have found wide use in the growing discipline of hydrogeophysics for characterizing the electrical properties of the subsurface and for monitoring subsurface processes in terms of the spatiotemporal changes in subsurface conductivity, chargeability, and source currents they govern. Presently, multichannel and multielectrode data collections systems can collect...
Use of induced polarization to characterize the hydrogeologic framework of the zone of surface‐water/groundwater exchange at the Hanford 300 Area, WA
Lee Slater, Dimitrios Ntarlagiannis, Frederick D. Day-Lewis, Kisa Mwakanyamale, John W. Lane Jr., Andy Ward, Roelof J. Versteeg
2010, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010
An extensive continuous waterborne electrical imaging (CWEI) survey was conducted along the Columbia River corridor adjacent to the U.S. Department of Energy (DOE) Hanford 300 Area, WA, in order to improve the conceptual model for exchange between surface water and U‐contaminated groundwater. The primary objective was to determine spatial variability...
