Anthropogenic organic matter in the Great Marsh of the Indiana Dunes National Lakeshore and its implications
Maria Mastalerz, C. Souch, G. M. Filippelli, N.L. Dollar, S.M. Perkins
2001, International Journal of Coal Geology (46) 157-177
Cores from the Great Marsh area of the Indiana Dunes National Lakeshore were examined in order to document variations in concentration, type and size of anthropogenic organic matter (AnOM-coal, coke, etc.) and discuss their relationship to the concentration of such trace elements as Pb, Zn, and Mn in the near-surface...
Influence of reservoirs on solute transport: A regional-scale approach
V.J. Kelly
2001, Hydrological Processes (15) 1227-1249
Regional transport of water and dissolved constituents through heavily regulated river systems is influenced by the presence of reservoirs. Analysis of seasonal patterns in solute fluxes for salinity and nutrients indicates that in-reservoir processes within large storage reservoirs in the Rio Grande and Colorado basins (southwestern USA) are superimposed over...
Processes regulating watershed chemical export during snowmelt, fraser experimental forest, Colorado
R. Stottlemyer
2001, Journal of Hydrology (245) 177-195
In the Central Rocky Mountains, snowfall dominates precipitation. Airborne contaminants retained in the snowpack can affect high elevation surface water chemistry during snowmelt. At the Fraser Experimental Forest (FEF), located west of the Continental Divide in Central Colorado, snowmelt dominates the annual hydrograph, and accounts for >95% of annual stream...
Methanogenic biodegradation of charcoal production wastes in groundwater at Kingsford, Michigan, USA
Godsy E. Michael, E. Warren, D.B. Westjohn
2001, IAHS-AISH Publication 303-310
A house exploded in the City of Kingsford, Michigan USA. The explosion was caused by CH4 that leaked into the basement from the surrounding soil. Evidence suggests that biodegradation of products from the distillation and spillage at or near a former wood carbonization plant site was the major source of...
Using multiple geochemical tracers to characterize the hydrogeology of the submarine spring off Crescent Beach, Florida
P.W. Swarzenski, C. D. Reich, R. M. Spechler, J. L. Kindinger, W.S. Moore
2001, Chemical Geology (179) 187-202
A spectacular submarine spring is located about 4 km east of Crescent Beach, FL, in the Atlantic Ocean. The single vent feature of Crescent Beach Spring provides a unique opportunity to examine onshore–offshore hydrogeologic processes, as well as point source submarine ground water discharge. The Floridan aquifer system in...
In situ stimulation of groundwater denitrification with formate to remediate nitrate contamination
R. L. Smith, D.N. Miller, M. H. Brooks, M.A. Widdowson, M.W. Killingstad
2001, Environmental Science & Technology (35) 196-203
In situ stimulation of denitrification has been proposed as a mechanism to remediate groundwater nitrate contamination. In this study, sodium formate was added to a sand and gravel aquifer on Cape Cod, MA, to test whether formate could serve as a potential electron donor for subsurface denitrification. During 16- and...
Pesticides associated with suspended sediments entering San Francisco Bay following the first major storm of water year 1996
Brian A. Bergamaschi, Kathryn Kuivila, Miranda S. Fram
2001, Estuaries (24) 368-380
Estuaries receive large quantities of suspended sediments following the first major storm of the water year. The first-flush events transport the majority of suspended sediments in any given year, and because of their relative freshness in the hydrologic system, these sediments may carry a significant amount of the sediment-associated pesticide...
Initial hydrologic and geomorphic response following a wildfire in the Colorado front range
John A. Moody, Deborah A. Martin
2001, Earth Surface Processes and Landforms (26) 1049-1070
A wildfire in May 1996 burned 4690 hectares in two watersheds forested by ponderosa pine and Douglas fir in a steep, mountainous landscape with a summer, convective thunderstorm precipitation regime. The wildfire lowered the erosion threshold in the watersheds, and consequently amplified the subsequent erosional response to shorter time interval...
Standard reference water samples for rare earth element determinations
P. L. Verplanck, Ronald C. Antweiler, D. Kirk Nordstrom, Howard E. Taylor
2001, Applied Geochemistry (16) 231-244
Standard reference water samples (SRWS) were collected from two mine sites, one near Ophir, CO, USA and the other near Redding, CA, USA. The samples were filtered, preserved, and analyzed for rare earth element (REE) concentrations (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb,...
Demonstration of significant abiotic iron isotope fractionation in nature
T.D. Bullen, A. F. White, C.W. Childs, D.V. Vivit, M.S. Schultz
2001, Geology (29) 699-702
Field and laboratory studies reveal that the mineral ferrihydrite, formed as a result of abiotic oxidation of aqueous ferrous to ferric Fe, contains Fe that is isotopically heavy relative to coexisting aqueous Fe. Because the electron transfer step of the oxidation process at pH >5 is essentially irreversible and should...
Transport and fate of organic wastes in groundwater at the Stringfellow hazardous waste disposal site, southern California
J.A. Leenheer, J. Hsu, L. B. Barber
2001, Journal of Contaminant Hydrology (51) 163-178
In January 1999, wastewater influent and effluent from the pretreatment plant at the Stringfellow hazardous waste disposal site were sampled along with groundwater at six locations along the groundwater contaminant plume. The objectives of this sampling and study were to identify at the compound class level the unidentified 40–60% of wastewater organic contaminants, and to determine...
Groundwater residence times in Shenandoah National Park, Blue Ridge Mountains, Virginia, USA: A multi-tracer approach
Niel Plummer, E. Busenberg, J.K. Böhlke, D.L. Nelms, R. L. Michel, P. Schlosser
2001, Chemical Geology (179) 93-111
Chemical and isotopic properties of water discharging from springs and wells in Shenandoah National Park (SNP), near the crest of the Blue Ridge Mountains, VA, USA were monitored to obtain information on groundwater residence times. Investigated time scales included seasonal (wet season, April, 1996; dry season, August–September, 1997), monthly (March...
Compound-specific carbon isotope analysis of a contaminant plume in Kingsford, Michigan, USA
R. L. Michel, S. R. Silva, B. Bemis, E.M. Godsy, E. Warren
2001, IAHS-AISH Publication 311-316
Compound-specific isotope analysis was used to study a contaminated site near Kingsford, Michigan, USA. Organic compounds at three of the sites studied had similar 13C values indicating that the contaminant source is the same for all sites. At a fourth site, chemical and 13C values had evolved due to microbial...
Effect of natural gas exsolution on specific storage in a confined aquifer undergoing water level decline
R. M. Yager, J.C. Fountain
2001, Ground Water (39) 517-525
The specific storage of a porous medium, a function of the compressibility of the aquifer material and the fluid within it, is essentially constant under normal hydrologic conditions. Gases dissolved in ground water can increase the effective specific storage of a confined aquifer, however, during water level declines. This causes...
Inter-annual changes in the benthic community structure of riffles and pools in reaches of contrasting gradient
J.L. Carter, S.V. Fend
2001, Hydrobiologia (459) 187-200
The inter-annual variation in the structure of the benthic community of riffles and pools was evaluated in contrasting geomorphic settings. The community structure of riffles and pools was a function of habitat, reach gradient, and discharge and was taxon specific. In years of below average peak discharge, riffles had higher...
Seasonal and event-scale variations in solute chemistry for four Sierra Nevada catchments
J.M. Holloway, R.A. Dahlgren
2001, Journal of Hydrology (250) 106-121
Hydrobiogeochemical processes controlling stream water chemistry were examined in four small (<5 km2) catchments having contrasting bedrock lithologies in the western Sierra Nevada foothills of California. The Mediterranean climate with its cool/wet and hot/dry cycle produces strong seasonal patterns in hydrological, biological and geochemical processes. Stream water solutes fall into...
Petrographic and geochemical evidence for the formation of primary, bacterially induced lacustrine dolomite: La Roda 'white earth' (Pliocene, Central Spain)
Del Garcia, M.A. Cura, J. P. Calvo, S. Ordonez, B.F. Jones, J.C. Canaveras
2001, Sedimentology (48) 897-915
Upper Pliocene dolomites ('white earth') from La Roda, Spain, offer a good opportunity to evaluate the process of dolomite formation in lakes. The relatively young nature of the deposits could allow a link between dolomites precipitated in modern lake systems and those present in older lacustrine formations. The La Roda...
Trace metal concentrations in shallow ground water
L.M. Zelewski, D. P. Krabbenhoft, D.E. Armstrong
2001, Ground Water (39) 485-491
Trace metal clean sampling and analysis techniques were used to examine the temporal patterns of Hg, Cu, and Zn concentrations in shallow ground water, and the relationships between metal concentrations in ground water and in a hydrologically connected river. Hg, Cu, and Zn concentrations in ground...
U.S. Geological Survey programs and investigations related to soil and water conservation
W. R. Osterkamp, J. R. Gray
2001, International Journal of Sediment Research (16) 421-429
The U.S. Geological Survey has a rich tradition of collecting hydrologic data, especially for fluxes of water and suspended sediment, that provide a foundation for studies of soil and water conservation. Applied and basic research has included investigations of the effects of land use on rangelands, croplands, and forests; hazards...
Trends in total phosphorus and total nitrogen concentrations of tributaries to the Swan - Canning Estuary, 1987 to 1998
R. Donohue, W.A. Davidson, N.E. Peters, S. Nelson, B. Jakowyna
2001, Hydrological Processes (15) 2411-2434
Temporal wet-season trends from 1987 to 1998 of total N and total P concentrations (TN and TP, respectively) in 14 tributaries to the Swan-Canning Estuary in Western Australia were evaluated using the Mann-Kendall or Seasonal kendall tests. Six of the catchments drained clay soils primarily on the Darling Plateau, which...
Nutrient transport to the Swan - Canning Estuary, Western Australia
N.E. Peters, R. Donohue
2001, Hydrological Processes (15) 2555-2577
Catchment nutrient availability in Western Australia is primarily controlled by the disposal of animal waste and the type and rate of fertilizer application, particularly on the relatively narrow (~25 km wide), sandy coastal plain. Nitrogen (N) and phosphorous (P) concentrations and fluxes during the wet season of 15 tributaries, including...
Effects of acidic recharge on groundwater at the St. Kevin Gulch site, Leadville, Colorado
S.S. Paschke, W.J. Harrison, K. Walton-Day
2001, Geochemistry: Exploration, Environment, Analysis (1) 3-14
The acid rock drainage-affected stream of St. Kevin Gulch recharges the Quaternary sand and gravel aquifer of Tennessee Park, near Leadville, Colorado, lowering pH and contributing iron, cadmium, copper, zinc and sulphate to the ground-water system. Dissolved metal mobility is controlled by the seasonal spring runoff as well as oxidation/reduction...
Widespread potential for microbial MTBE degradation in surface-water sediments
P. M. Bradley, J. E. Landmeyer, F. H. Chapelle
2001, Environmental Science & Technology (35) 658-662
Microorganisms indigenous to stream and lake bed sediments, collected from 11 sites throughout the United States, demonstrated significant mineralization of the fuel oxygenate, methyl-tert-butyl ether (MTBE). Mineralization of [U-14C]MTBE to 14CO2 ranged from 15 to 66% over 50 days and did not differ significantly between sediments collected from MTBE contaminated...
Transient storage assessments of dye-tracer injections in rivers of the Willamette Basin, Oregon
A. Laenen, K.E. Bencala
2001, Journal of the American Water Resources Association (37) 367-377
Rhodamine WT dye-tracer injections in rivers of the Willamette Basin yield concentration-time curves with characteristically long recession times suggestive of active transient storage processes. The scale of drainage areas contributing to the stream reaches studied in the Willamette Basin ranges from 10 to 12,000 km2. A transient storage assessment of...
Identification of methyl halide-utilizing genes in strain IMB-1, a methyl bromide-utilizing bacterium suggests a high degree of conservation of methyl halide-specific genes in gram-negative bacteria
C.A. Woodall, K.L. Warner, R.S. Oremland, J.C. Murrell, I.R. McDonald
2001, Applied and Environmental Microbiology (67) 1959-1963
Strain IMB-1, an aerobic methylotrophic member of the alpha subgroup of the Proteobacteria, can grow with methyl bromide as a sole carbon and energy source. A single cmu gene cluster was identified in IMB-1 that contained six open reading frames: cmuC, cmuA, orf146, paaE, hutI, and partial metF. CmuA from...
