Snowpack in Maine - Maximum Observed and March 1 Mean Equivalent Water Content
Marc C. Loiselle, Glenn A. Hodgkins
2002, Water-Resources Investigations Report 2001-4258
Historical snow data have been analyzed using geographic information systems software to determine the magnitude and distribution of maximum observed equivalent water content of snowpack for the State of Maine. Data from 109 sites with an average of 43 years of record were used to generate the map of maximum...
Aeromagnetic Expression of Buried Basaltic Volcanoes Near Yucca Mountain, Nevada
Dennis W. O’Leary, E. A. Mankinen, R.J. Blakely, V.E. Langenheim, D. A. Ponce
2002, Open-File Report 2002-020
A high-resolution aeromagnetic survey has defined a number of small dipolar anomalies indicating the presence of magnetic bodies buried beneath the surface of Crater Flat and the Amargosa Desert. Results of potential-field modeling indicate that isolated, small-volume, highly magnetic bodies embedded within the alluvial deposits of both areas produce the...
Discharge measurements using a broad-band acoustic Doppler current profiler
Michael R. Simpson
2002, Open-File Report 2001-1
The measurement of unsteady or tidally affected flow has been a problem faced by hydrologists for many years. Dynamic discharge conditions impose an unreasonably short time constraint on conventional current-meter discharge-measurement methods, which typically last a minimum of 1 hour. Tidally affected discharge can change more than 100 percent during...
Mapped minerals at Questa, New Mexico, using airborne visible-infrared imaging spectrometer (AVIRIS) data – Preliminary report for: First quarterly report of the U.S. Geological Survey investigation of baseline and pre-mining ground-water quality in the Red River Valley Basin, New Mexico, November 13, 2001
K. Eric Livo, Roger N. Clark
2002, Open-File Report 2002-26
This preliminary study for the First Quarterly Report has spectrally mapped hydrothermally altered minerals useful in assisting in assessment of water quality of the Red River. Airborne Visible-Infrared Imaging Spectrometer (AVIRIS) data was analyzed to characterize mined and unmined ground at Questa, New Mexico. AVIRIS data covers the Red River...
Exploring the effect of drought extent and interval on the Florida snail kite: Interplay between spatial and temporal scales
Wolf M. Mooij, Robert E. Bennetts, Wiley M. Kitchens, Donald L. DeAngelis
2002, Ecological Modelling (149) 25-39
The paper aims at exploring the viability of the Florida snail kite population under various drought regimes in its wetland habitat. The population dynamics of snail kites are strongly linked with the hydrology of the system due to the dependence of this bird species on one exclusive prey species, the...
Population dynamics and mutualism: Functional responses of benefits and costs
J. Nathaniel Holland, Donald L. DeAngelis, Judith L. Bronstein
2002, American Naturalist (159) 231-244
We develop an approach for studying population dynamics resulting from mutualism by employing functional responses based on density‐dependent benefits and costs. These functional responses express how the population growth rate of a mutualist is modified by the density of its partner. We present several possible dependencies of gross benefits and...
Whole-rock and glass major-element geochemistry of Kilauea Volcano, Hawaii, near-vent eruptive products: September 1994 through September 2001
Carl R. Thornber, David R. Sherrod, David F. Siems, Christina C. Heliker, Gregory P. Meeker, Robert L. Oscarson, James P. Kauahikaua
2002, Open-File Report 2002-17
This report presents major-element geochemical data for glasses and whole-rock aliquots among 523 lava samples collected near the vent on Kilauea's east rift zone between September 1994 and October 2001. Information on sample collection, analysis techniques and analytical standard reproducibility are presented as a PDF file, which also includes a...
Multibeam mapping of the West Florida Shelf, Gulf of Mexico
James V. Gardner, Peter Dartnell, Kenneth J. Sulak
2002, Open-File Report 02-5
A zone of deep-water reefs is thought to extend from the mid and outer shelf south of Mississippi and Alabama to at least the northwestern Florida shelf off Panama City, Florida (Figure 1). The reefs off Mississippi and Alabama are found in water depths of 60 to 120 m (Ludwick...
Hydrogeological investigation at Site 5, Willow Grove Naval Air Station/Joint Reserve Base, Horsham Township, Montgomery County, Pennsylvania
Ronald A. Sloto
2002, Water-Resources Investigations Report 2001-4263
The U.S. Geological Survey conducted borehole geophysical logging, collected and analyzed water-level data, and sampled sections of a rock core to determine the concentration of volatile organic compounds in the aquifer matrix of the Stockton Formation. Borehole geophysical logs were run in three monitor wells. At well 05MW04I, the vertical...
In-situ evidence for uranium immobilization and remobilization
John M. Senko, Jonathan D. Istok, Joseph M. Suflita, Lee R. Krumholz
2002, Environmental Science & Technology (36) 1491-1496
The in-situ microbial reduction and immobilization of uranium was assessed as a means of preventing the migration of this element in the terrestrial subsurface. Uranium immobilization (putatively identified as reduction) and microbial respiratory activities were evaluated in the presence of exogenous electron donors and acceptors with field push−pull tests using...
Cautions and suggestions for geochemical sampling in fractured rock
Allen M. Shapiro
2002, Groundwater Monitoring & Remediation (22) 151-164
Collecting water samples for geochemical analyses in open bedrock boreholes or in discrete intervals of boreholes intersected by multiple fractures is likely to yield ambiguous results for ground water chemistry because of the variability in the transmissivity, storativity, and hydraulic head of fractures intersecting the borehole. Interpreting chemical analyses of...
PCR diagnostics underestimate the prevalence of avian malaria (Plasmodium relictum) in experimentally-infected passerines
Susan I. Jarvi, Jeffrey J. Schultz, Carter T. Atkinson
2002, Journal of Parasitology (88) 153-158
Several polymerase chain reaction (PCR)-based methods have recently been developed for diagnosing malarial infections in both birds and reptiles, but a critical evaluation of their sensitivity in experimentally-infected hosts has not been done. This study compares the sensitivity of several PCR-based methods for diagnosing avian malaria (Plasmodium relictum) in captive...
First report of a water mite in the family Pionidae (Acari: Parasitengona: Hygrobatoidea) in the Hawaiian Islands
Dennis A. LaPointe
2002, Bishop Museum Occasional Papers (69) 41-42
Species of water mites can be found in over 100 families and subfamilies and are known to occur in great abundance and diversity throughout the world (Smith & Cook, 1991). Not surprisingly, few fresh-water mites occur in the Hawaiian Islands (Nishida, 1994). Imamura (1981) reported two halacrid mites from O‘ahu...
Lithostratigraphic, conodont, and other faunal links between lower Paleozoic strata in northern and central Alaska and northeastern Russia
Julie A. Dumoulin, Anita G. Harris, Mussa Gagiev, Dwight Bradley, John E. Repetski
2002, Geological Society of America Special Papers (360) 291-312
Lower Paleozoic platform carbonate strata in northern Alaska (parts of the Arctic Alaska, York, and Seward terranes; herein called the North Alaska carbonate platform) and central Alaska (Farewell terrane) share distinctive lithologic and faunal features, and may have formed on a single continental fragment situated between Siberia and Laurentia. Sedimentary...
Effect of the northward-migrating Mendocino triple junction on the Eel River forearc basin, California: Stratigraphic development
Sean P. S. Gulick, Anne S. Meltzer, Samuel H. Clarke Jr.
2002, GSA Bulletin (114) 178-191
The Eel River forearc basin, northern California, lies at the southern end of the Cascadia subduction zone and at the leading edge of the migrating Mendocino triple junction. Stratigraphic relationships within the Eel River forearc basin suggest that the current outer-arc high formed between ca. 3 and 2 Ma when...
Protocol for determining bull trout presence
James Peterson, Jason B. Dunham, Philip Howell, Russell Thurow, Scott Bonar
2002, Report, Western Division of American Fisheries Society
The Western Division of the American Fisheries Society was requested to develop protocols for determining presence/absence and potential habitat suitability for bull trout. The general approach adopted is similar to the process for the marbled murrelet, whereby interim guidelines are initially used, and the protocols are subsequently refined as...
U.S. drinking water challenges in the twenty-first century
Ronnie B. Levin, Paul R. Epstein, Tim E. Ford, Winston Harrington, Erik R. Olson, Eric G. Reichard
2002, Environmental Health Perspectives (110) 43-52
The access of almost all 270 million U.S. residents to reliable, safe drinking water distinguishes the United States in the twentieth century from that of the nineteenth century. The United States is a relatively water-abundant country with moderate population growth; nonetheless, current trends are sufficient to strain water resources over...
Geologic map of the Tetilla Peak Quadrangle, Santa Fe and Sandoval counties, New Mexico
D.A. Sawyer, R. R. Shroba, S.A. Minor, R. A. Thompson
2002, Miscellaneous Field Studies Map 2352
This digital geologic map summarizes all available geologic information for the Tetilla Peak quadrangle located immediately southwest of Santa Fe, New Mexico. The geologic map consists of new polygon (geologic map units) and line (contact, fault, fold axis, dike, flow contact, hachure) data, as well as point data (locations...
Structural instability, multiple stable states, and hysteresis in periphyton driven by phosphorus enrichment in the Everglades
Quan Dong, Paul V. McCormick, Fred H. Sklar, Donald L. DeAngelis
2002, Theoretical Population Biology (61) 1-13
Periphyton is a key component of the Everglades ecosystems. It is a major primary producer, providing food and habitat for a variety of organisms, contributing material to the surface soil, and regulating water chemistry. Periphyton is sensitive to the phosphorus (P) supply and P enrichment has caused dramatic changes in...
Resistivity structure across the Humboldt River basin, north-central Nevada
Brian D. Rodriguez, Jackie M. Williams
2002, Open-File Report 2002-39
Magnetotelluric data collected along five profiles show deep resistivity structures beneath the Battle Mountain-Eureka and Carlin gold trends in north-central Nevada, which appear consistent with tectonic breaks in the crust that possibly served as channels for hydrothermal fluids. It seems likely that gold deposits along these linear trends were, therefore, controlled by deep regional crustal fault...
Geologic map of the Vail West quadrangle, Eagle County, Colorado
Robert B. Scott, David J. Lidke, Daniel J. Grunwald
2002, Miscellaneous Field Studies Map 2369
This new 1:24,000-scale geologic map of the Vail West 7.5' quadrangle, as part of the USGS Western Colorado I-70 Corridor Cooperative Geologic Mapping Project, provides new interpretations of the stratigraphy, structure, and geologic hazards in the area on the southwest flank of the Gore...
Capability of AVHRR data in discriminating rangeland cover mixtures
Gabriel B. Senay, Raymond L. Elliott
2002, International Journal of Remote Sensing (23) 299-312
A combination of high temporal resolution Advanced Very High Resolution Radiometer (AVHRR) data and high spatial information Map Information Analysis and Display System (MIADS) landuse/landcover data from the United States Department of Agriculture-Natural Resources Conservation Service (USDA-NRCS) were used to investigate the feasibility of using the combined dataset for regional...
Geologic map of the Nor Arvik coal site, southern Armenia
E. A. Johnson, Artur Martirosyan, B.S. Pierce, Gourgen Malkhassian, Michael E. Brownfield
2002, Miscellaneous Field Studies Map 2380
No abstract available. ...
Geologic map of part of the southern Toquima Range and adjacent areas, Nye County, Nevada
D. R. Shawe
2002, Miscellaneous Field Studies Map 2327-A
No abstract available....
Geologic map of the Eagle Quadrangle, Eagle County, Colorado
D. J. Lidke
2002, Miscellaneous Field Studies Map 2361
The Eagle quadrangle covers an area that straddles the Eagle River and Interstate 70 (I-70) and it includes the town of Eagle, Colo., which is located in the southwestern part of the quadrangle, just south of I-70 and the Eagle River, about 37 km west of Vail, Colo. The...
