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Page 1915, results 47851 - 47875

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Not all publications have extents, not all extents are completely accurate
Inference of distributional parameters from compositional samples containing nondetects
Ricardo A. Olea
2009, Conference Paper, CODAWORK’08
Low concentrations of elements in geochemical analyses have the peculiarity of being compositional data and, for a given level of significance, are likely to be beyond the capabilities of laboratories to distinguish between minute concentrations and complete absence, thus preventing laboratories from reporting extremely low concentrations of the analyte. Instead,...
Defining restoration targets for water depth and salinity in wind-dominated Spartina patens (Ait.) Muhl. coastal marshes
J.A. Nyman, Megan K. LaPeyre, Andral W. Caldwell, Sarai C. Piazza, C. Thom, C. Winslow
2009, Journal of Hydrology (376) 327-336
Coastal wetlands provide valued ecosystem functions but the sustainability of those functions often is threatened by artificial hydrologic conditions. It is widely recognized that increased flooding and salinity can stress emergent plants, but there are few measurements to guide restoration, management, and mitigation. Marsh flooding can be estimated over large...
Wildfire risk in the wildland-urban interface: A simulation study in northwestern Wisconsin
Avi Bar Massada, Volker C. Radeloff, Susan I. Stewart, Todd Hawbaker
2009, Forest Ecology and Management (258) 1990-1999
The rapid growth of housing in and near the wildland–urban interface (WUI) increases wildfire risk to lives and structures. To reduce fire risk, it is necessary to identify WUI housing areas that are more susceptible to wildfire. This is challenging, because wildfire patterns depend on fire behavior and spread, which...
Water Use in Wisconsin, 2005
Cheryl A. Buchwald
2009, Open-File Report 2009-1076
The U.S. Geological Survey (USGS) Wisconsin Water Science Center is responsible for presenting data collected or estimated for water withdrawals and diversions every 5 years to the National Water-Use Information Program (NWUIP). This program serves many purposes such as quantifying how much, where, and for what purpose water is used;...
Multivariate Statistical Models for Predicting Sediment Yields from Southern California Watersheds
Joseph E. Gartner, Susan H. Cannon, Dennis R. Helsel, Mark Bandurraga
2009, Open-File Report 2009-1200
Debris-retention basins in Southern California are frequently used to protect communities and infrastructure from the hazards of flooding and debris flow. Empirical models that predict sediment yields are used to determine the size of the basins. Such models have been developed using analyses of records of the amount of material...
Groundwater quality data in the Mojave study unit, 2008: Results from the California GAMA Program
Timothy M. Mathany, Kenneth Belitz
2009, Data Series 440
Groundwater quality in the approximately 1,500 square-mile Mojave (MOJO) study unit was investigated from February to April 2008, as part of the Priority Basin Project of the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The GAMA Priority Basin Project was developed in response to the Groundwater Quality Monitoring Act of...
A case study of carbon fluxes from land change in the Southwest Brazilian Amazon
K. Barrett, J. Rogan, J.R. Eastman
2009, Journal of Land Use Science (4) 233-248
Worldwide, land change is responsible for one-fifth of anthropogenic carbon emissions. In Brazil, three-quarters of carbon emissions originate from land change. This study represents a municipal-scale study of carbon fluxes from vegetation in Rio Branco, Brazil. Land-cover maps of pasture, forest, and secondary growth from 1993, 1996, 1999, and 2003...
Near-field receiving water monitoring of trace metals and a benthic community near the Palo Alto Regional Water Quality Control Plant in South San Francisco Bay, California: 2008
Daniel J. Cain, Janet K. Thompson, Jessica Dyke, Francis Parcheso, Samuel N. Luoma, Michelle I. Hornberger
2009, Open-File Report 2009-1193
Results reported herein include trace element concentrations in sediment and in the clam Macoma petalum (formerly reported as Macoma balthica (Cohen and Carlton, 1995)), clam reproductive activity, and benthic macroinvertebrate community structure for a mudflat one kilometer south of the discharge of the Palo Alto Regional Water Quality Control Plant (PARWQCP) in South San...
Dendrogeomorphic Assessment of the Rattlesnake Gulf Landslide in the Tully Valley, Onondaga County, New York
Kathryn L. Tamulonis, William M. Kappel
2009, Scientific Investigations Report 2009-5134
Dendrogeomorphic techniques were used to assess soil movement within the Rattlesnake Gulf landslide in the Tully Valley of central New York during the last century. This landslide is a postglacial, slow-moving earth slide that covers 23 acres and consists primarily of rotated, laminated, glaciolacustrine silt and clay. Sixty-two increment cores...
Emergency Assessment of Postfire Debris-Flow Hazards for the 2009 Station Fire, San Gabriel Mountains, Southern California
Susan H. Cannon, Joseph E. Gartner, Michael G. Rupert, John A. Michael, Dennis M. Staley, Bruce B. Worstell
2009, Open-File Report 2009-1227
This report presents an emergency assessment of potential debris-flow hazards from basins burned by the 2009 Station fire in Los Angeles County, southern California. Statistical-empirical models developed for postfire debris flows are used to estimate the probability and volume of debris-flow production from 678 drainage basins within the burned area...
Petrified Forest National Park Invasive Plant Species Survey and Mapping; 2002-2005
Kathryn A. Thomas, Randall J. Hunt, Terry R. Arundel, P. Guertin
2009, Open-File Report 2009-1179
We conducted a survey for invasive nonnative plant species at Petrified Forest National Park from 2002 through 2005. The survey employed a unique sampling design consisting of a grid of consecutive one-hectare cells as the sampling units. Our use of predetermined sampling units allowed all observations to be referenced to...
Passage and behavior of radio-tagged adult Pacific Lamprey (Entosphenus tridentata) at the Willamette Falls Project, Oregon, 2005-07
Matthew G. Mesa, Robert J. Magie, Elizabeth S. Copeland
2009, Open-File Report 2009-1223
We used radio telemetry to monitor passage and describe behavior characteristics of adult Pacific lampreys, Entosphenus tridentata, during their upstream migration at the Willamette Falls Project (Project) on the Willamette River near Portland, Oregon. Our objectives were to document: (1) specific routes of passage at the dam and falls; (2)...
Paper birch decline in the Niobrara River Valley, Nebraska: Weather, microclimate, and birch stand conditions
Esther D. Stroh, Joel P. Miller
2009, Open-File Report 2009-1221
The Niobrara River Valley in north-central Nebraska supports scattered stands of paper birch (Betula papyrifera Marsh), a species more typical of boreal forests. These birch stands are considered to be relictual populations that have persisted since the end of the Wisconsin glaciation, when regional flora was more boreal in nature...
Detection and characterization of benthic filamentous algal stands (Cladophora sp.) on rocky substrata using a high-frequency echosounder
David C. Depew, Andrew W. Stevens, Ralph E.H. Smith, Robert E. Hecky
2009, Limnology and Oceanography (7) 693-705
A high-frequency echosounder was used to detect and characterize percent cover and stand height of the benthic filamentous green alga Cladophora sp. on rocky substratum of the Laurentian Great Lakes. Comparisons between in situ observations and estimates of the algal stand characteristics (percent cover, stand height) derived from the acoustic...
Application guide for AFINCH (Analysis of Flows in Networks of Channels) described by NHDPlus
David J. Holtschlag
2009, Scientific Investigations Report 2009-5188
AFINCH (Analysis of Flows in Networks of CHannels) is a computer application that can be used to generate a time series of monthly flows at stream segments (flowlines) and water yields for catchments defined in the National Hydrography Dataset Plus (NHDPlus) value-added attribute system. AFINCH provides a basis for integrating...
Preliminary vitrinite and bitumen reflectance, total organic carbon, and pyrolysis data for samples from Upper and Lower Cretaceous strata, Maverick Basin, south Texas
Paul C. Hackley, Kristin O. Dennen, Rachel M. Gesserman, Jennie L. Ridgley
2009, Open-File Report 2009-1220
The Lower Cretaceous Pearsall Formation, a regionally occurring limestone and shale interval of 500-600-ft maximum thickness (Rose, 1986), is being evaluated as part of an ongoing U.S. Geological Survey (USGS) assessment of undiscovered hydrocarbon resources in onshore Lower Cretaceous strata of the northern Gulf of Mexico. The purpose of this report...
Quantifying the undiscovered geothermal resources of the United States
Colin F. Williams, Marshall J. Reed, Jacob DeAngelo, S. Peter Galanis Jr.
2009, Conference Paper, Geothermal Resources Council Transactions
In 2008, the U.S. Geological Survey (USGS) released summary results of an assessment of the electric power production potential from the moderate- and high-temperature geothermal resources of the United States (Williams et al., 2008a; USGS Fact Sheet 2008-3082; http://pubs.usgs.gov/fs/2008/3082). In the assessment, the estimated mean power production potential from undiscovered...
The National Map Customer Requirements: Findings from Interviews and Surveys
Larry Sugarbaker, Kevin E. Coray, Barbara Poore
2009, Open-File Report 2009-1222
The purpose of this study was to receive customer feedback and to understand data and information requirements for The National Map. This report provides results and findings from interviews and surveys and will guide policy and operations decisions about data and information requirements leading to the development of a 5-year...
Giant Constrictors: Biological and Management Profiles and an Establishment Risk Assessment for Nine Large Species of Pythons, Anacondas, and the Boa Constrictor
Robert N. Reed, Gordon H. Rodda
2009, Open-File Report 2009-1202
Giant Constrictors: Biological and Management Profiles and an Establishment Risk Assessment for Nine Large Species of Pythons, Anacondas, and the Boa Constrictor, estimates the ecological risks associated with colonization of the United States by nine large constrictors. The nine include the world's four largest snake species (Green Anaconda, Eunectes murinus;...
Characteristics of the April 2007 Flood at 10 Streamflow-Gaging Stations in Massachusetts
Phillip J. Zarriello, Carl S. Carlson
2009, Scientific Investigations Report 2009-5068
A large 'nor'easter' storm on April 15-18, 2007, brought heavy rains to the southern New England region that, coupled with normal seasonal high flows and associated wet soil-moisture conditions, caused extensive flooding in many parts of Massachusetts and neighboring states. To characterize the magnitude of the April 2007 flood, a...
Bankfull discharge and channel characteristics of streams in New York State
Christiane I. Mulvihill, Barry P. Baldigo, Sarah J. Miller, Douglas DeKoskie, Joel DuBois
2009, Scientific Investigations Report 2009-5144
Equations that relate drainage area to bankfull discharge and channel characteristics (such as width, depth, and cross-sectional area) at gaged sites are needed to help define bankfull discharge and channel characteristics at ungaged sites and can be used in stream-restoration and protection projects, stream-channel classification, and channel assessments. These equations...