Spatially explicit decision support for selecting translocation areas for Mojave desert tortoises
Jill S. Heaton, Kenneth E. Nussear, Todd C. Esque, Richard D. Inman, Frank Davenport, Thomas E. Leuteritz, Philip A. Medica, Nathan W. Strout, Paul A. Burgess, Lisa Benvenuti
2008, Biodiversity and Conservation (17) 575-590
Spatially explicit decision support systems are assuming an increasing role in natural resource and conservation management. In order for these systems to be successful, however, they must address real-world management problems with input from both the scientific and management communities. The National Training Center at Fort Irwin, California, has expanded...
Chemical Results of Laboratory Dry/Rewet Experiments Conducted on Wetland Soils from Two Sites in the Everglades, Florida
William H. Orem
2008, Open-File Report 2008-1090
Drought and fire are natural environmental factors that have historically impacted and shaped the Everglades ecosystem. For example, drought and fire help to maintain the existing ecosystem biotic assemblage by periodically eradicating invading flora not adapted to living with this normal aspect of Everglades' ecology. Flora native to the Everglades...
A New Method for Mapping Population Distribution
Rachel Sleeter
2008, Fact Sheet 2008-3010
Human population counts are collected and commonly displayed uniformly across areas, such as U.S. Census Bureau block-groups and tracts. The limitation inherent in this type of representation is the assumption that people are evenly distributed across each areal unit, when in actuality many areas such as parks, open spaces, and...
Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissance geologic map for the Kuskokwim Bay region of southwest Alaska
2008, Open-File Report 2008-1001
INTRODUCTION The growth in the use of Geographic Information Systems (GIS) has highlighted the need for digital geologic maps that have been attributed with information about age and lithology. Such maps can be conveniently used to generate derivative maps for manifold special purposes such as mineral-resource assessment, metallogenic studies, tectonic studies,...
Preliminary integrated geologic map databases for the United States: Digital data for the reconnaissance geologic map for Prince William Sound and the Kenai Peninsula, Alaska
2008, Open-File Report 2008-1002
The growth in the use of Geographic Information Systems (GIS) has highlighted the need for digital geologic maps that have been attributed with information about age and lithology. Such maps can be conveniently used to generate derivative maps for manifold special purposes such as mineral-resource assessment, metallogenic studies, tectonic studies,...
Estimating Water Fluxes Across the Sediment-Water Interface in the Lower Merced River, California
Celia Zamora
2008, Scientific Investigations Report 2007-5216
The lower Merced River Basin was chosen by the U.S. Geological Survey?s (USGS) National Water Quality Assessment Program (NAWQA) to be included in a national study on how hydrological processes and agricultural practices interact to affect the transport and fate of agricultural chemicals. As part of this effort, surface-water?ground-water (sw?gw)...
Potentiometric Surface of the Ozark Aquifer near Springfield, Missouri, 2006-07
Joseph M. Richards, Douglas N. Mugel
2008, Scientific Investigations Map 3003
INTRODUCTION A study of the water resources of the Springfield, Missouri, area in the 1970s determined that a cone of depression, formed by ground-water pumping, had developed in the Ozark aquifer beneath the city (Emmett and others, 1978). Continued ground-water usage in the 1970s and 1980s caused concern that ground-water resources...
Increasing eolian dust deposition in the western United States linked to human activity
J. C. Neff, A. P. Ballantyne, G. L. Farmer, N. M. Mahowald, C. C. Landry, J. T. Overpeck, T. H. Painter, C. R. Lawrence, Richard L. Reynolds
2008, Nature Geoscience (1) 189-195
Mineral aerosols from dust are an important influence on climate and on marine and terrestrial biogeochemical cycles. These aerosols are generated from wind erosion of surface soils. The amount of dust emission can therefore be affected by human activities that alter surface sediments. However, changes in regional- and global-scale dust...
Mining impacts on fish in the Clark Fork River, Montana: A field ecotoxicology case study
Samuel N. Luoma, Johnnie N Moore, Aida Farag, Tracy H. Hillman, Daniel J. Cain, Michelle I. Hornberger
Richard T. Di Giulio, David E. Hinton, editor(s)
2008, Book chapter, The toxicology of fishes
No abstract available....
GSFLOW - Coupled Ground-Water and Surface-Water Flow Model Based on the Integration of the Precipitation-Runoff Modeling System (PRMS) and the Modular Ground-Water Flow Model (MODFLOW-2005)
Steven L. Markstrom, Richard G. Niswonger, R. Steven Regan, David E. Prudic, Paul M. Barlow
2008, Techniques and Methods 6-D1
The need to assess the effects of variability in climate, biota, geology, and human activities on water availability and flow requires the development of models that couple two or more components of the hydrologic cycle. An integrated hydrologic model called GSFLOW (Ground-water and Surface-water FLOW) was developed to simulate coupled...
Water Resources of the Basin and Range Carbonate-Rock Aquifer System, White Pine County, Nevada, and Adjacent Areas in Nevada and Utah
Daniel J. Bright, Lari A. Knochenmus
Alan H. Welch, editor(s)
2008, Scientific Investigations Report 2007-5261
INTRODUCTION This report summarizes results of a water-resources study for White Pine County, Nevada, and adjacent areas in east-central Nevada and western Utah. The Basin and Range carbonate-rock aquifer system (BARCAS) study was initiated in December 2004 through Federal legislation (Section 301(e) of the Lincoln County Conservation, Recreation, and Development Act...
Real-Time and Delayed Analysis of Tree and Shrub Cores as Indicators of Subsurface Volatile Organic Compound Contamination, Durham Meadows Superfund Site, Durham, Connecticut, August 29, 2006
Don A. Vroblesky, Richard E. Willey, Scott Clifford, James J. Murphy
2008, Scientific Investigations Report 2007-5212
This study examined volatile organic compound concentrations in cores from trees and shrubs for use as indicators of vadose-zone contamination or potential vapor intrusion by volatile organic compounds into buildings at the Durham Meadows Superfund Site, Durham, Connecticut. The study used both (1) real-time tree- and shrub-core analysis, which involved...
Understanding the ecology of disease in Great Lakes fish populations
Stephen Riley, K.R. Munkittrick, Allison N. Evans, Charles C. Krueger
2008, Aquatic Ecosystem Health & Management (11) 321-334
Disease may be an important factor affecting wild fish population dynamics in the Great Lakes, but a lack of information on the ecology of fish disease currently precludes the prediction of risks to fish populations. Here we propose a conceptual framework for conducting ecologically-oriented fish health research that addresses the...
Retrospective Review of Watershed Characteristics and a Framework for Future Research in the Sarasota Bay Watershed, Florida
George R. Kish, Arnell S. Harrison, Mark Alderson
2008, Open-File Report 2007-1349
The U.S. Geological Survey, in cooperation with the Sarasota Bay Estuary Program conducted a retrospective review of characteristics of the Sarasota Bay watershed in west-central Florida. This report describes watershed characteristics, surface- and ground-water processes, and the environmental setting of the Sarasota Bay watershed. Population growth during the last 50 years...
A decade of measuring, monitoring, and studying the fate and transport of triazine herbicides in groundwater, surface water, reservoirs, and precipitation by the U.S. Geological Survey
E.M. Thurman, E.A. Scribner
J. McFarland, editor(s)
2008, Book chapter, The triazine herbicides
No abstract available. ...
Gathering, organizing, and accessing data for use in bird conservation across the Americas
Elizabeth Martin, Bruce G. Peterjohn, Steve Kelling
Terrell D. Rich, editor(s)
2008, Conference Paper, Tundra to tropics: Connecting birds, habitats and people, proceedings of the fourth International Partners in Flight Conference
The U.S. North American Bird Conservation Initiative (NABCI) Monitoring Subcommittee (2007) identified the need for a comprehensive plan for integrating and managing bird population monitoring data, and to adapt this as an integral component for improving monitoring activities across North America. While the Subcommittee provided a basic framework to begin...
Time-averaged near-bed suspended sediment concentrations under waves and currents: Comparison of measured and model estimates
D.A. Cacchione, P.D. Thorne, Y Agrawal, N.J. Nidzieko
2008, Article
Profiles of suspended sediment concentration and velocity were measured over a 15-day period at a near-shore site off Santa Cruz, CA in Monterey Bay. The concentration and velocity data were collected with an Acoustic Backscattering System (ABS) and Acoustic Current Profiler (ACP) that were mounted on a bottom tripod. High-resolution...
Climate simulation and flood risk analysis for 2008-40 for Devils Lake, North Dakota
Aldo V. Vecchia
2008, Scientific Investigations Report 2008-5011
Devils Lake and Stump Lake in northeastern North Dakota receive surface runoff from a 3,810-square-mile drainage basin, and evaporation provides the only major water loss unless the lakes are above their natural spill elevation to the Sheyenne River. In September 2007, flow from Devils Lake to Stump Lake had...
Geologic Map of the Piedmont Hollow Quadrangle, Oregon County, Missouri
David J. Weary
2008, Scientific Investigations Map 2979
The Piedmont Hollow 7.5-min quadrangle is located in south-central Missouri within the Salem Plateau region of the Ozark Plateaus physiographic province (Fenneman, 1938; Bretz, 1965) (fig. 1). Almost all of the land in the quadrangle north of the Eleven Point River is part of the Mark Twain National Forest. Most...
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2006
James P. Dixon, Scott D. Stihler, John A. Power, Cheryl Searcy
2008, Data Series 326
Between January 1 and December 31, 2006, AVO located 8,666 earthquakes of which 7,783 occurred on or near the 33 volcanoes monitored within Alaska. Monitoring highlights in 2006 include: an eruption of Augustine Volcano, a volcanic-tectonic earthquake swarm at Mount Martin, elevated seismicity and volcanic unrest at Fourpeaked Mountain, and...
Science Activities Associated with Proposed 2008 High-Flow Experiment at Glen Canyon Dam
John Hamill
2008, Fact Sheet 2008-3011
Grand Canyon National Park lies approximately 15 miles downriver from Glen Canyon Dam, which was built on the Colorado River just south of the Arizona-Utah border. Because the dam stops most sediment moving downstream, its presence has resulted in erosion and shrinkage of river sandbars in Grand Canyon. Fewer and...
Variations in Community Exposure and Sensitivity to Tsunami Hazards on the Open-Ocean and Strait of Juan de Fuca Coasts of Washington
Nathan Wood, Christopher Soulard
2008, Scientific Investigations Report 2008-5004
Evidence of past events and modeling of potential future events suggest that tsunamis are significant threats to communities on the open-ocean and Strait of Juan de Fuca coasts of Washington. Although potential tsunami-inundation zones from a Cascadia Subduction Zone (CSZ) earthquake have been delineated, the amount and type of human...
Evaluation of a Single-Beam Sonar System to Map Seagrass at Two Sites in Northern Puget Sound, Washington
Andrew W. Stevens, Jessica R. Lacy, David P. Finlayson, Guy Gelfenbaum
2008, Scientific Investigations Report 2008-5009
Seagrass at two sites in northern Puget Sound, Possession Point and nearby Browns Bay, was mapped using both a single-beam sonar and underwater video camera. The acoustic and underwater video data were compared to evaluate the accuracy of acoustic estimates of seagrass cover. The accuracy of the acoustic method was...
Needs Assessment and Scoping Study for Sinking Ships as Diving Sites in Puget Sound
Steve Rubin, Eric E. Grossman, Lynne Koontz, Anthony Paulson, Natalie Sexton, Reg Reisenbichler
2008, Open-File Report 2008-1020
BACKGROUND There is growing interest in starting a program to sink ships in Puget Sound to create one or more underwater dive sites. Experience in other parts of the world has indicated that sunken vessels are highly popular with divers and could provide a basis for increased recreation and attraction of...
New constraints on the Pb and Nd isotopic evolution of NE Atlantic water masses
S. B. Muinos, M. Frank, C. Maden, J.R. Hein, T. van de Flierdt, S. M. Lebreiro, L. Gaspar, J. H. Monteiro, A. N. Halliday
2008, Geochemistry, Geophysics, Geosystems (9)
Time series of lead (Pb) and neodymium (Nd) isotope compositions were measured on three ferromanganese crusts recording the evolution of NE Atlantic water masses over the past 15 Ma. The crusts are distributed along a depth profile (∼700–4600 m) comprising the present-day depths of Mediterranean Outflow Water and North East...
