Distribution of stable isotopes in ground water in the Rialto-Colton basin, California
Linda R. Woolfenden
1993, Conference Paper, Management of Irrigation and Drainage Systems : Integrated Perspectives
Since 1982, imported water originating in the Sierra Nevada has been used to recharge the Rialto-Colton ground-water basin, about 100 km east of Los Angeles. Stable isotopes of oxygen (oxygen-18) and hydrogen (deuterium) were used to determine the disposition of artificially recharged, imported water within the basin. Delta oxygen-18 ratios...
Evaluation of the extent of contaminated sediments in the west branch of the Grand Calumet river, Indiana-Illinois, USA
R.A. Cahill, M.T. Unger
1993, Conference Paper, Water Science and Technology
The extent of contamination in river sediments is often not rigorously evaluated. In many cases, only surface sediment samples are taken. In other cases, entire sediment cores are composited for analysis, an approach that limits the ability to identify discrete zones of contamination. In addition, few studies include information on...
Constraints in the hot-dry-rock resources of the united states
John Sass, Marianne Guffanti
Anon, editor(s)
1993, Conference Paper, Transactions - Geothermal Resources Council
As with hydrothermal systems, the western U.S has higher HDR potential overall than the eastern U.S. because geothermal gradients on average are higher in the west. Nevertheless, some attractive exploration targets occur in the eastern U.S. The most favorable target in the eastern U.S. (defined here to include the Great...
Methane in permafrost - Preliminary results from coring at Fairbanks, Alaska
K.A. Kvenvolden, T.D. Lorenson
1993, Conference Paper, Chemosphere
Permafrost has been suggested as a high-latitude source of methane (a greenhouse gas) during global warming. To begin to assess the magnitude of this source, we have examined the methane content of permafrost in samples from shallow cores (maximum depth, 9.5m) at three sites in Fairbanks, Alaska, where discontinuous permafrost...
Effects of climatic variations over 11 years on nitrate-nitrogen concentrations in the Raccoon River, Iowa
K.J. Lucey, D. A. Goolsby
1993, Journal of Environmental Quality (22) 38-46
Nitrate-nitrogen (NO3-N) concentrations at public water supply intakes on the Des Moines and Raccoon Rivers in Iowa exceeded the maximum contaminant level (MCL) of 10 mg L-1 for public water supplies established by the USEPA for extended periods of time from March through early August 1990. The excessive NO3-N levels...
Late quaternary history and uranium isotopic compositions of ground water discharge deposits, Crater Flat, Nevada
James B. Paces, Emily M. Taylor, Charles Bush
1993, Conference Paper, High Level Radioactive Waste Management
Three carbonate-rich spring deposits are present near the southern end of Crater Flat, NV, approximately 18 km southwest of the potential high-level waste repository at Yucca Mountain. We have analyzed five samples of carbonate-rich material from two of the deposits for U and Th isotopic compositions. Resulting U-series disequilibrium ages...
Gas buildup in Lake Nyos, Cameroon: The recharge process and its consequences
William C. Evans, G.W. Kling, M. L. Tuttle, G. Tanyileke, L. D. White
1993, Applied Geochemistry (8) 207-221
The gases dissolved in Lake Nyos, Cameroon, were quantified recently (December 1989 and September 1990) by two independent techniques: in-situ measurements using a newly designed probe and laboratory analyses of samples collected in pre-evacuated stainless steel cylinders. The highest concentrations of CO2 and CH4 were...
A geochemical atlas of North Carolina, USA
J.C. Reid
1993, Journal of Geochemical Exploration (47) 11-27
A geochemical atlas of North Carolina, U.S.A., was prepared using National Uranium Resource Evaluation (NURE) stream-sediment data. Before termination of the NURE program, sampling of nearly the entire state (48,666 square miles of land area) was completed and geochemical analyses were obtained.The NURE data are applicable to mineral exploration, agriculture,...
Geohydrologic systems in Kansas — Geohydrology of the lower aquifer unit in the western interior plains aquifer system
L. J. Combs, Cristi V. Hansen, R. J. Wolf
1993, Hydrologic Atlas 722-I
No abstract available....
Preventing volcanic catastrophe; the U.S. International Volcano Disaster Assistance Program
J.W. Ewert, T.L. Murray, A. B. Lockhart, C.D. Miller
1993, Earthquakes & Volcanoes (USGS) (24) 270-291
When the seismograph began to record the violent earth-shaking caused by yet another eruption of the Nevado del Ruiz volcano in Colombia, no one thought that a few hours later more than 23,000 people would be dead, killed by lahars (volcanic debris flows) in towns and villages several tens of...
Toxicity and bioaccumulation of waterborne and dietary selenium in juvenile bluegill (Lepomis macrochirus)
Laverne Cleveland, Edward E. Little, Denny R. Buckler, Raymond H. Wiedmeyer
1993, Aquatic Toxicology (27) 265-279
Juvenile bluegill (Lepomis macrochirus) were exposed to waterborne selenium as a 6:1 mixture of selenate to selenite (as Se) for 60 d and to dietary seleno-l-methionine for 90 d. Measured concentrations of total selenium in the waterborne exposure ranged from 0.16 to 2.8 mg/l, and concentrations of seleno-l-methionine...
Survival of lake trout stocked in U.S. Waters of Lake Ontario
Joseph H. Elrod, Clifford P. Schneider, David E. Ostergaard
1993, North American Journal of Fisheries Management (13) 775-781
Lake trout Salvelinus namaycush of the 1979–1990 year-classes (Lake Superior strain) were marked and stocked as fingerlings or yearlings in U.S. waters of Lake Ontario and recaptured during annual surveys with trawls and gill nets. Catches (as proportions of fish stocked) of age-2 fish by trawls and age-3 fish by gill nets...
Evidence for late Holocene relative sea-level fall from reconnaissance stratigraphical studies in an area of earthquake-subsided intertidal deposits, Isla Chiloé, southern Chile
L.E. Frostick, R.J. Steel, S. Bartsch-Winkler, H. R. Schmoll
1993, Book chapter, Tectonic controls and signatures in sedimentary successions
At Río Pudeto and Quetalmahue, two estuaries along the northern shore of Isla Chiloé that subsided as much as 2 m in the great 1960 earthquake, reconnaissance stratigraphical studies reveal evidence of a regressive, nearshore marine sequence. The intertidal deposits include a peat-bearing, high-intertidal marsh sequence as thick as...
Interaction of rising frazil with suspended particles: Tank experiments with applications to nature
E. Reimnitz, J. R. Clayton, E. W. Kempema, J. R. Payne, W. S. Weber
1993, Cold Regions Science and Technology (21) 117-135
Widespread occurrence of sediment-laden (turbid) sea ice and high concentrations of diatoms and foraminifers in ice have recently been reported from both polar regions. Many possible mechanisms of particle entrainment into ice have been postulated, among which scavenging by rising frazil ice and nucleation or adhesion of ice onto suspended...
Central Nebraska river basins Nebraska
Thomas L. Huntzinger, Michael J. Ellis
1993, Water Resources Bulletin (29) 533-574
The Central Nebraska Basins (NAWQA) study unit includes the Platte River and two major tributaries, the Loup and Elkhorn Rivers. Platte River flows are variable of diversions, but the Loup and Elkhorn Rivers originate in an area of dune sand covered by grassland that generates consistent base flows. Ground water...
Pesticides in shallow groundwater in the Delmarva Peninsula
M.T. Koterba, W.S.L. Banks, R. J. Shedlock
1993, Journal of Environmental Quality (22) 500-518
A regional study of the areal and depth distribution of pesticides in shallow groundwater in the Delmarva Peninsula of Delaware, Maryland, and Virginia was done to (i) relate the pesticides detected to landscape and shallow subsurface features, and (ii) evaluate aquifer vulnerability and the potential...
Summary of revised potentiometric-surface map for Yucca Mountain and vicinity, Nevada
E. M. Ervin, R. R. Luckey, D.J. Burkhardt
1993, Conference Paper, High Level Radioactive Waste Management
The revised map for the potentiometric surface of the uppermost saturated zone in Tertiary volcanic rocks at Yucca Mountain, Nevada, is based mainly on 1988 water levels. Refinement of the water-level corrections has increased understanding of the area immediately east-southeast and hydrologically downgradient of Yucca Mountain. This small-gradient area is...
U.S. Geological Survey bedload sampling policy
G. Douglas Glysson
1993, Conference Paper, Proceedings - National Conference on Hydraulic Engineering
During the late 1960's, the U.S. Geological Survey's (USGS) Water Resources Division (WRD) developed the Helley-Smith bedload sampler. Since then, the USGS and the Technical Committee of the Federal Interagency Subcommittee on Sedimentation (Technical Committee) have performed extensive flume and field studies concerning the calibration and use of bedload samplers....
Volcanic gases create air pollution on the Island of Hawai’i
J. Sutton, T. Elias
1993, Earthquakes & Volcanoes (USGS) (24) 178-196
In a handful of molten magma weighing about a pound, there is less than a tenth of an ounce, by weight, of idssolved gas-roughly the same weight as a pinch of table salt. Yet this tiny amount of gas produces spectacular lava foundations hundreds of meters high (see accompanying photograph)....
Simulation of cylindrical flow to a well using the U.S. Geological Survey Modular Finite-Difference Ground-Water Flow Model
Thomas E. Reilly, Arlen W. Harbaugh
1993, Groundwater (31) 489-494
Cylindrical (axasymmetric) flow to a well is an important specialized topic of ground-water hydraulics and has been applied by many investigators to determine aquifer properties and determine heads and flows in the vicinity of the well. A recent modification to the U.S. Geological Survey Modular...
Rio Grande valley Colorado new Mexico and Texas
Sherman R. Ellis, Gary W. Levings, Lisa F. Carter, Steven F. Richey, Mary Jo Radell
1993, Water Resources Bulletin (29) 617-646
Two structural settings are found in the study unit: alluvial basins and bedrock basins. The alluvial basins can have through-flowing surface water or be closed basins. The discussion of streamflow and water quality for the surface-water system is based on four river reaches for the 750 miles of the main...
Concentration history during pumping from a leaky aquifer with stratified initial concentration
Daniel J. Goode, Paul A. Hsieh, Allen M. Shapiro, Warren W. Wood, Thomas F. Kraemer
1993, Conference Paper, Proceedings - National Conference on Hydraulic Engineering
Analytical and numerical solutions are employed to examine the concentration history of a dissolved substance in water pumped from a leaky aquifer. Many aquifer systems are characterized by stratification, for example, a sandy layer overlain by a clay layer. To obtain information about separate hydrogeologic units, aquifer pumping tests are...
Statistical evaluation of hydrologic conditions in the vicinity of abandoned underground coal mines around Cannelburg, Indiana
D. Harper, G.A. Olyphant
1993, Journal of Hydrology (146) 49-71
A statistical analysis of daily water-level changes in an abandoned coal mine indicates that precipitation affects the potentiometric level of the mine, independent of associated atmospheric pressure changes and changes in the water level of an overlying aquifer. The independent statistical...
Factors Affecting 14C Ages of Lacustrine Carbonates: Timing and Duration of the Last Highstand Lake in the Lahontan Basin
L. Benson
1993, Quaternary Research (39) 163-174
Two processes contribute to inaccurate 14C age estimates of carbonates precipitated within the Lahontan basin, NevadaCalifornia: low initial 14C/C ratios in lake water (reservoir effect) and addition of modern carbon to calcium carbonate after its precipitation. The mast reliable set of 14C ages on carbonates from elevations > 1310 m...
Estimation of water-filled and air-filled porosity in the unsaturated zone, Yucca Mountain, Nevada
Philip H. Nelson
1993, Conference Paper, High Level Radioactive Waste Management
The responses of density and dielectric logs are formulated in terms if the matrix properties, air-filled porosity and water-filled porosity. Porosity values obtained from logs from borehole USW G-2 are in reasonable agreement with estimates from core determinations....
