Water Resources Division, U.S. Geological Survey
1998, Report
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Page 1232, results 30776 - 30800
Publication Extents
Not all publications have extents, not all extents are completely accurateJill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Melvin P. Nenneman, Betty R. Euliss
1998, Report, Effects of management practices on grassland birds
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds...
Timothy S. Collett
1998, Conference Paper, Transactions of the SPWLA Annual Logging Symposium (Society of Professional Well Log Analysts)
The amount of gas sequestered in gas hydrates is probably enormous, but estimates are highly speculative due to the lack of previous quantitative studies. Gas volumes that may be attributed to a gas hydrate accumulation within a given geologic setting are dependent on a number of reservoir parameters; one of...
R. E. Arvidson, C. Acton, D. Blaney, J. Bowman, S. Kim, G. Klingelhofer, J. Marshall, C. Niebur, J. Plescia, R.S. Saunders, C.T. Ulmer
1998, Journal of Geophysical Research E: Planets (103) 22671-22688
Experiments with the Rocky 7 rover were performed in the Mojave Desert to better understand how to conduct rover-based, long-distance (kilometers) geological traverses on Mars. The rover was equipped with stereo imaging systems for remote sensing science and hazard avoidance and 57Fe Mössbauer and nuclear magnetic resonance spectrometers for in situ...
Thomas D. Pellett, Gene J. Van Dyck, Jean V. Adams
1998, North American Journal of Fisheries Management (18) 85-95
A multiyear tag and recapture study was conducted to determine whether channel catfishIctalurus punctatus were migratory and if they had strong homing tendencies. Over 10,000 channel catfish were tagged from the lower Wisconsin River and adjacent waters of the upper Mississippi River during the 3-year sampling period. Data on movements were...
R.L. Runkel, Diane M. McKnight, E.D. Andrews
1998, Journal of the North American Benthological Society (17) 143-154
Transport of dissolved material in streams and small rivers may be characterized using tracer-dilution methods and solute transport models. Recent studies have quantified stream/substream interactions using models of transient storage. These studies are based on tracer-dilution data obtained during periods of steady flow. We present...
M. A. Kalkhan, R.M. Reich, T.J. Stohlgren
1998, International Journal of Remote Sensing (19) 2049-2060
Double sampling was used to provide a cost efficient estimate of the accuracy of a Landsat Thematic Mapper (TM) classification map of a scene located in the Rocky Mountain National Park, Colorado. In the first phase, 200 sample points were randomly selected to assess the accuracy between Landsat TM data...
B. Chouet, G. De Luca, G. Milana, P. Dawson, M. Martini, R. Scarpa
1998, Bulletin of the Seismological Society of America (88) 653-666
The properties of the tremor wave field at Stromboli are analyzed using data from small-aperture arrays of short-period seismometers deployed on the north flank of the volcano. The seismometers are configured in two semi-circular arrays with radii of 60 and 150 m and...
Kenneth G. Stollenwerk
1998, Water Resources Research (34) 2727-2740
A natural-gradient tracer test was conducted in an unconfined sand and gravel aquifer on Cape Cod, Massachusetts. Molybdate was included in the injectate to study the effects of variable groundwater chemistry on its aqueous distribution and to evaluate the reliability of laboratory experiments for identifying and quantifying reactions that control...
J.A. Davis, J.A. Coston, D.B. Kent, C. C. Fuller
1998, Environmental Science & Technology (32) 2820-2828
Two types of modeling approaches are illustrated for describing inorganic contaminant adsorption in aqueous environments: (a) the component additivity approach and (b) the generalized composite approach. Each approach is applied to simulate Zn2+ adsorption by a well-characterized sediment collected from an aquifer at Cape Cod, MA. Zn2+ adsorption by the...
S.L. King, J. A. Allen, J.W. McCoy
1998, Forest Ecology and Management (112) 213-226
We investigated the long-term effects of a lock and dam and greentree reservoir management on a riparian bottomland hardwood forest in southern Arkansas, USA, by monitoring stress, mortality, and regeneration of bottomland hardwood trees in 53 permanent sampling plots from 1987-1995. The lock and dam and greentree reservoir management have...
A.J. Ranalli
1998, Water, Air, & Soil Pollution (104) 423-441
Survey for continuous measurement of water temperature, specific conductance, and pH in four low ionic strength streams in the Catskill Mountains of New York was evaluated through a calculation of their bias, precision, and accuracy and by comparison with laboratory measurements of specific conductance and pH on samples collected concurrently....
Charles P. Madenjian, George E. Noguchi, Robert C. Haas, Kathrin S. Schrouder
1998, Canadian Journal of Fisheries and Aquatic Sciences (55) 1085-1092
Adult male walleye (Stizostedion vitreum) exhibited significantly higher polychlorinated biphenyl (PCB) concentrations than similarly aged female walleye from Saginaw Bay (Lake Huron). To explain this difference, we tested the following three hypotheses: (i) females showed a considerably greater reduction in PCB concentration immediately following spawning than males, (ii) females...
Paul L. Flint, J. Barry Grand, Robert F. Rockwell
1998, Journal of Wildlife Management (62) 1110-1118
Our objective was to synthesize individual components of reproductive ecology into a single estimate of productivity and to assess the relative effects of survival and productivity on population dynamics. We used information on nesting ecology, renesting potential, and duckling survival of northern pintails (Anas acuta) collected on the Yukon-Kuskokwim Delta...
W. A. Barnhardt, J. T. Kelley, S.M. Dickson, D. F. Belknap
1998, Journal of Coastal Research (14) 646-659
The bedrock-framed seafloor in the northwestern Gulf of Maine is characterized by extreme changes in bathymetric relief and covered with a wide variety of surficial materials. Traditional methods of mapping cannot accurately represent the great heterogeneity of such a glaciated region. A new mapping scheme for complex seafloors, based primarily...
J.-P. Gattuso, M. Frankignoulle, I. Bourge, S. Romaine, R. W. Buddemeier
1998, Global and Planetary Change (18) 37-46
The carbonate chemistry of seawater is usually not considered to be an important factor influencing calcium-carbonate-precipitation by corals because surface seawater is supersaturated with respect to aragonite. Recent reports, however, suggest that it could play a major role in the evolution and biogeography of recent corals. We investigated the calcification...
J.L. Corn, M.J. Conroy
1998, Journal of Mammalogy (79) 1009-1015
We captured mongooses (Herpestes javanicus) in live traps arranged in trapping webs in Antigua, West Indies, and used capture-recapture and distance sampling to estimate density. Distance estimation and program DISTANCE were used to provide estimates of density from the trapping-web data. Mean density based on trapping webs was 9.5 mongooses/ha...
Peter J. Saccocia, Jeffrey S. Seewald, Wayne C. Shanks III
1998, Geochimica et Cosmochimica Acta (62) 485-492
Hydrogen and oxygen isotope fractionation factors between brucite and aqueous NaCl solutions (1000lnαbr-sw) have been calibrated by experiment from 250 to 450°C at 0.5 Kb. For D/H fractionation, 1000lnα br-sw values are as follows: −32 ± 6‰ (250°C, 3.2 wt% NaCl), −21 ± 2‰ (350°C, 10.0 wt% NaCl), and −22 ± 2‰...
C.D. McElwee, M.A. Zenner
1998, Water Resources Research (34) 55-66
While doing slug tests in high-permeability aquifers, we have consistently seen deviations from the expected response of linear theoretical models. Normalized curves do not coincide for various initial heads, as would be predicted by linear theories, and are shifted to larger times for higher initial heads. We have developed a...
Richard M. Yager
1998, Water Resources Research (34) 1623-1633
Nonlinear regression is used to estimate optimal parameter values in models of groundwater flow to ensure that differences between predicted and observed heads and flows do not result from nonoptimal parameter values. Parameter estimates can be affected, however, by observations that disproportionately influence the regression, such as outliers that exert...
B. S. Hemingway, S.R. Bohlen, W.B. Hankins, E.F. Westrum Jr., O.L. Kuskov
1998, American Mineralogist (83) 409-418
The heat capacities of synthetic coesite and jadeite were measured between about 15 and 850 K by adiabatic and differential scanning calorimetry. The experimental data were smoothed and estimates were made of heat capacities to 1800 K. The following equations represent our estimate of the heat capacities of coesite and...
Greg A. Ludvigson, Luis A. Gonzalez, R.A. Metzger, B.J. Witzke, Richard L. Brenner, A.P. Murillo, T. S. White
1998, Geology (26) 1039-1042
Sphaerosiderite, a morphologically distinct millimeter-scale spherulitic siderite (FeCO3), forms predominantly in wetland soils and sediments, and is common in the geologic record. Ancient sphaerosiderites are found in paleosol horizons within coal-bearing stratigraphic intervals and, like their modern counterparts, are interpreted as having formed...
V.A. Zlotnik, V. L. McGuire
1998, Journal of Hydrology (204) 283-296
Using the developed theory and modified Springer-Gelhar (SG) model, an identification method is proposed for estimating hydraulic conductivity from multi-level slug tests. The computerized algorithm calculates hydraulic conductivity from both monotonic and oscillatory well responses obtained using a double-packer system. Field verification of the method was performed at a specially...
A. Milia, L. Mirabile, M.M. Torrente, J.J. Dvorak
1998, Bulletin of Volcanology (59) 404-413
High-resolution seismic reflection data are used to identify structural features in Naples Bay near Vesuvius Volcano. Several buried seismic units with reflection-free interiors are probably volcanic deposits erupted during and since the formation of the breached crater of Monte Somma Volcano, which preceded the growth of Vesuvius. The presumed undersea...
Chris G. Ingersoll, Eric L. Brunson, F. James Dwyer, Douglas K. Hardesty, Nile E. Kemble
1998, Environmental Toxicology and Chemistry (17) 1508-1523
Short-term sediment toxicity tests that only measure effects on survival can be used to identify high levels of contamination but may not be able to identify marginally contaminated sediments. The objective of the present study was to develop a method for determining the potential sublethal effects of contaminants associated with...