Professionals in environmental education: Helping kids learn about forestry
D.H. Anderson, J.L. Thompson, P.J. Jakes
1998, Journal of Forestry (96) 25-29
A K--8 school in a suburb of St. Paul has formed a partnership with natural resource professionals to create a school forest for environmental education in the field. The university and agency professionals worked with students to teach them the skills necessary to map and inventory their school grounds....
Effects of management practices on grassland birds: Sedge Wren
Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Barry D. Parkin, 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and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers.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...
Effects of management practices on grassland birds: Loggerhead Shrike
Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Melvin P. Nenneman, A.L. Zimmerman, 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and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers.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...
Pesticides in surface waters of the Santee River basin and coastal drainages, North and South Carolina
Terry L. Maluk, Robert E. Kelley II
1998, Fact Sheet 007-98
IntroductionThis report summarizes the available pesticide data for surface waters in the Santee River Basin and coastal drainages (SANT) study area, as part of the U.S. Geological Survey (USGS) National Water-Quality Assessment (NAWQA) Program. Data from the U.S. Environmental Protection Agency Storage and Retrieval database and data collected by the...
Ground-water discharge and base-flow nitrate loads of nontidal streams, and their relation to a hydrogeomorphic classification of the Chesapeake Bay watershed, middle Atlantic Coast
L. Joseph Bachman, Bruce D. Lindsey, John W. Brakebill, David S. Powars
1998, Water-Resources Investigations Report 98-4059
Existing data on base-flow and groundwater nitrate loads were compiled and analyzed to assess the significance of groundwater discharge as a source of the nitrate load to nontidal streams of the Chesapeake Bay watershed. These estimates were then related to hydrogeomorphic settings based on lithology and physiographic province to provide...
Mapping the Gulf of Maine with side-scan sonar: A new bottom-type classification for complex seafloors
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...
Regionalization of precipitation characteristics in Montana using L-moments
C. Parrett
1998, Transportation Research Record (1647) 43-52
Dimensionless precipitation-frequency curves for estimating precipitation depths having small exceedance probabilities were developed for 2-, 6-, and 24-hour storm durations for three homogeneous regions in Montana. L-moment statistics were used to help define the homogeneous regions. The generalized extreme value distribution was used to construct the frequency curves for each duration...
Trace element abundances of high-MgO glasses from Kilauea, Mauna Loa and Haleakala volcanoes, Hawaii
T.P. Wagner, David A. Clague, E.H. Hauri, T.L. Grove
1998, Contributions to Mineralogy and Petrology (131) 13-21
We performed an ion-microprobe study of eleven high-MgO (6.7-14.8 wt%) tholeiite glasses from the Hawaiian volcanoes Kilauea, Mauna Loa and Haleakala. We determined the rare earth (RE), high field strength, and other selected trace element abundances of these glasses, and used the data to establish their relationship to typical Hawaiian...
Geodynamics of magmatic Cu-Ni-PGE sulfide deposits: New insights from the Re-Os isotope system
D.D. Lambert, J.G. Foster, L.R. Frick, E.M. Ripley, M. L. Zientek
1998, Economic Geology (93) 121-136
In this study, we reassess crustal contamination and sulfide ore-forming processes in some of the largest magmatic ore deposits, using published Re-Os isotope data and a modeling methodology that incorporates the R factor, defined as the effective mass of silicate magma with which a given mass of sulfide magma has...
Oyster resource zones of the Barataria and Terrebonne estuaries of Louisiana
E. Melancon Jr., T. Soniat, V. Cheramie, R. Dugas, J. Barras, M. Lagarde
1998, Journal of Shellfish Research (17) 1143-1148
A 1:100,000 scale map delineating the subtidal oyster resource zones within the Barataria and Terrebonne estuaries was developed. Strategies to accomplish the task included interviews with Louisiana oystermen and state biologists to develop a draft map, field sampling to document oyster (Crassostrea virginica), Dermo (Perkinsus marinus), and oyster drill (Stramonita...
Analysis of simulated advanced spaceborne thermal emission and reflection (ASTER) radiometer data of the Iron Hill, Colorado, study area for mapping lithologies
L. C. Rowan
1998, Journal of Geophysical Research D: Atmospheres (103) 32291-32306
The advanced spaceborne thermal emission and reflection (ASTER) radiometer was designed to record reflected energy in nine channels with 15 or 30 m resolution, including stereoscopic images, and emitted energy in five channels with 90 m resolution from the NASA Earth Observing System AMI platform. A simulated ASTER data set...
DNA-labeled clay: A sensitive new method for tracing particle transport
B.J. Mahler, M. Winkler, P. Bennett, D.M. Hillis
1998, Geology (26) 831-834
The behavior of mobile colloids and sediment in most natural environments remains poorly understood, in part because characteristics of existing sediment tracers limit their widespread use. Here we describe the development of a new approach that uses a DNA-labeled montmorillonite clay as a...
Petrofacies Analysis - A Petrophysical Tool for Geologic/Engineering Reservoir Characterization
W.L. Watney, W. J. Guy, J.H. Doveton, S. Bhattacharya, P.M. Gerlach, Geoffrey C. Bohling, T.R. Carr
1998, AAPG Memoir 73-90
Petrofacies analysis is defined as the characterization and classification of pore types and fluid saturations as revealed by petrophysical measurements of a reservoir. The word "petrofacies" makes an explicit link between petroleum engineers' concerns with pore characteristics as arbiters of production performance and the facies paradigm of geologists as a...
Analysis of lake-bottom sediment to estimate historical nonpoint-source phosphorus loads
K. E. Juracek
1998, Journal of the American Water Resources Association (34) 1449-1463
ABSTRACT Bottom sediment in Hillsdale Lake, Kansas, was analyzed to estimate the annual load of total phosphorus deposited in the lake from nonpoint sources. Topographic, bathymetric, and sediment-core data were used to estimate the total mass of phosphorus in the lake-bottom sediment. Available streamflow and...
Scaling laws from geomagnetic time series
Z. Voros, P. Kovacs, A. Juhasz, A. Kormendi, A.W. Green
1998, Geophysical Research Letters (25) 2621-2624
The notion of extended self-similarity (ESS) is applied here for the X-component time series of geomagnetic field fluctuations. Plotting nth order structure functions against the fourth order structure function we show that low-frequency geomagnetic fluctuations up to the order n = 10 follow the same scaling laws as MHD fluctuations...
Detection of aquifer system compaction and land subsidence using interferometric synthetic aperture radar, Antelope Valley, Mojave Desert, California
D. L. Galloway, K.W. Hudnut, S. E. Ingebritsen, S.P. Phillips, G. Peltzer, F. Rogez, P.A. Rosen
1998, Water Resources Research (34) 2573-2585
Interferometric synthetic aperture radar (InSAR) has great potential to detect and quantify land subsidence caused by aquifer system compaction. InSAR maps with high spatial detail and resolution of range displacement (±10 mm in change of land surface elevation) were developed for a groundwater basin (∼103 km2) in Antelope Valley, California, using...
Well log evaluation of gas hydrate saturations
T. 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...
Large impact features on Europa: Results of the Galileo Nominal Mission
Jeffrey M. Moore, Erik Asphaug, Robert J. Sullivan, James E. Klemaszewski, Kelly C. Bender, Ronald Greeley, Paul E. Geissler, Alfred S. McEwen, Elizabeth P. Turtle, Cynthia B. Phillips, B. Randy Tufts, James W. Head III, Robert T. Pappalardo, Kevin B. Jones, Clark R. Chapman, Michael J.S. Belton, Randolph L. Kirk, David Morrison
1998, Icarus (135) 127-145
The Galileo Orbiter examined several impact features on Europa at considerably better resolution than was possible from Voyager. The new data allow us to describe the morphology and infer the geology of the largest impact features on Europa, which are probes into the crust. We observe two basic types of...
Modeling tidal hydrodynamics of San Diego Bay, California
P.-F. Wang, R. T. Cheng, K. Richter, E.S. Gross, D. Sutton, J. W. Gartner
1998, Journal of the American Water Resources Association (34) 1123-1140
In 1983, current data were collected by the National Oceanic and Atmospheric Administration using mechanical current meters. During 1992 through 1996, acoustic Doppler current profilers as well as mechanical current meters and tide gauges were used. These measurements not only document tides and tidal currents in San Diego Bay, but...
Automated detection of Pi 2 pulsations using wavelet analysis: 1. Method and an application for substorm monitoring
M. Nose, T. Iyemori, M. Takeda, T. Kamei, D. K. Milling, D. Orr, H. J. Singer, E. W. Worthington, N. Sumitomo
1998, Earth, Planets and Space (50) 773-783
Wavelet analysis is suitable for investigating waves, such as Pi 2 pulsations, which are limited in both time and frequency. We have developed an algorithm to detect Pi 2 pulsations by wavelet analysis. We tested the algorithm and found that the results of Pi 2 detection are consistent with those...
Age and duration of the Mississippi Valley-type mineralizing fluid flow event in the Viburnum Trend, southeast Missouri, USA, determined from palaeomagnetism
David T. A. Symons, Michael T. Lewchuk, D. L. Leach
1998, Geological Society Special Publication (144) 27-39
The Viburnum Trend is a world-class Mississippi Valley-type (MVT) lead-zinc ore deposit in platform carbonates of the Upper Cambrian Bonneterre Dolomite in the midcontinent of the USA. Palaeomagnetic methods have been used to analyse 233 specimens from early octahedral (nine sites) and late-stage cubic (13 sites) galena...
Field study and simulation of diurnal temperature effects on infiltration and variably saturated flow beneath an ephemeral stream
Anne Dudek Ronan, David E. Prudic, Carl E. Thodal, Jim Constantz
1998, Water Resources Research (34) 2137-2153
Two experiments were performed to investigate flow beneath an ephemeral stream and to estimate streambed infiltration rates. Discharge and stream-area measurements were used to determine infiltration rates. Stream and subsurface temperatures were used to interpret subsurface flow through variably saturated sediments beneath the stream. Spatial variations in subsurface temperatures suggest...
Analysis of the influence of spatial pattern in habitat selection studies
David L. Otis
1998, Journal of Agricultural, Biological, and Environmental Statistics (3) 254-267
Design and analysis of wildlife habitat selection studies typically do not assess the effect of spatial pattern on the habitat selection process. Effects of landscape scale pattern on habitat selection cannot be accomplished without replicate study areas, because pattern is a single, albeit multifaceted, attribute of an area. For a...
AIRSAR studies of woody shrub density in semiarid rangeland: Jornada del Muerto, New Mexico
H.B. Musick, G.S. Schaber, C. S. Breed
1998, Remote Sensing of Environment (66) 29-40
This study evaluates the use of polarimetric Airborne Synthetic Aperture Radar (AIRSAR) data to assess woody shrub density in a semiarid site where the vegetation consists primarily of varied mixtures of herbaceous vegetation and shrubs. AIRSAR data and field observations of vegetation cover and growth form-composition were obtained for 59...
Bayesian statistics applied to the location of the source of explosions at Stromboli Volcano, Italy
G. Saccorotti, B. Chouet, M. Martini, R. Scarpa
1998, Bulletin of the Seismological Society of America (88) 1099-1111
We present a method for determining the location and spatial extent of the source of explosions at Stromboli Volcano, Italy, based on a Bayesian inversion of the slowness vector derived from frequency-slowness analyses of array data. The method searches for source locations that...
