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Page 1858, results 46426 - 46450

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Two-dimensional hydrodynamic modeling to quantify effects of peak-flow management on channel morphology and salmon-spawning habitat in the Cedar River, Washington
Christiana Czuba, Jonathan A. Czuba, Andrew S. Gendaszek, Christopher S. Magirl
2010, Report
The Cedar River in Washington State originates on the western slope of the Cascade Range and provides the City of Seattle with most of its drinking water, while also supporting a productive salmon habitat. Water-resource managers require detailed information on how best to manage high-flow releases from Chester Morse Lake,...
Geomorphic Framework to assess changes to aquatic habitat due to flow regulation and channel and floodplain alteration, Cedar River, Washington
Andrew S. Gendaszek, Christopher S. Magirl, Christiana R. Czuba, Christopher P. Konrad, Rand Little
2010, Report
Flow regulation, bank armoring, and floodplain alteration since the early 20th century have contributed to significant changes in the hydrologic regime and geomorphic processes of the Cedar River in Washington State. The Cedar River originates in the Cascade Range, provides drinking water to the Seattle metropolitan area, and supports several...
Mechanical suppression of northern pike (Esox lucius) populations in small Arizona reservoirs
Yuliya Kuzmenko, Timofy Spesiviy, Scott A. Bonar
2010, Fisheries Research Report 01-10
Introduced populations of northern pike Esox lucius have provided angling opportunities in the western United States (McMahon and Bennett 1996). However, the northern pike is a voracious piscivore and its large size, high fecundity, and broad physiological tolerance make it capable of drastically altering ecosystems it invades (Marchetti et al....
Human enteric viruses in groundwater indicate offshore transport of human sewage to coral reefs of the Upper Florida Keys
J. Carrie Futch, Dale W. Griffin, Erin K. Lipp
2010, Environmental Microbiology (12) 964-974
To address the issue of human sewage reaching corals along the main reef of the Florida Keys, samples were collected from surface water, groundwater and coral [surface mucopolysaccharide layers (SML)] along a 10 km transect near Key Largo, FL. Samples were collected semi-annually between July 2003 and September 2005 and...
Use of regression‐based models to map sensitivity of aquatic resources to atmospheric deposition in Yosemite National Park, USA
David W. Clow, Leora Nanus, Brian Huggett
2010, Water Resources Research (46)
An abundance of exposed bedrock, sparse soil and vegetation, and fast hydrologic flushing rates make aquatic ecosystems in Yosemite National Park susceptible to nutrient enrichment and episodic acidification due to atmospheric deposition of nitrogen (N) and sulfur (S). In this study, multiple linear regression (MLR) models were created to estimate...
Water-quality, water-level, and discharge data associated with the Mississippi embayment agricultural chemical-transport study, 2006-2008
Melinda S. Dalton, Claire E. Rose, Richard H. Coupe
2010, Data Series 546
In 2006, the Agricultural Chemicals: Sources, Transport and Fate study team (Agricultural Chemicals Team, ACT) of the U.S. Geological Survey National Water-Quality Assessment Program began a study in northwestern Mississippi to evaluate the influence of surface-water recharge on the occurrence of agriculturally related nutrients and pesticides in the Mississippi River...
Are wolves saving Yellowstone's aspen? A landscape-level test of a behaviorally mediated trophic cascade
Matthew J. Kauffman, Jedediah F. Brodie, Erik S. Jules
2010, Ecology (91) 2742-2755
Behaviorally mediated trophic cascades (BMTCs) occur when the fear of predation among herbivores enhances plant productivity. Based primarily on systems involving small-bodied predators, BMTCs have been proposed as both strong and ubiquitous in natural ecosystems. Recently, however, synthetic work has suggested that the existence of BMTCs may be mediated by...
Discussion of "Natural hydrograph of the Missouri River near Sioux City and the least tern and piping plover" by Donald G. Jorgensen
D. Catlin, R. Jacobson, M. Sherfy, M. Anteau, J. Felio, J. Fraser, C. Lott, T. Shaffer, J. Stucker
2010, Journal of Hydrologic Engineering (15) 1076-1078
The author analyzed stream-flow data from a single gauging station to predict preengineering flooding frequency for "sandbar islands adjacent to stream gauge on the Missouri River at Sioux City." He predicted dates that sandbars would be exposed and discussed his results relative to reproduction by least terns (Sternula antillarum) and...
Origins of large-volume, compositionally zoned volcanic eruptions: New constraints from U-series isotopes and numerical thermal modeling for the 1912 Katmai-Novarupta eruption
Simon Turner, Mike Sandiford, Mark Reagan, Chris Hawkesworth, Wes Hildreth
2010, Journal of Geophysical Research B: Solid Earth (115) B12201
We present the results of a combined U-series isotope and numerical modeling study of the 1912 Katmai-Novarupta eruption in Alaska. A stratigraphically constrained set of samples have compositions that range from basalt through basaltic andesite, andesite, dacite, and rhyolite. The major and trace element range can be modeled by 80–90%...
Coherence of Mach fronts during heterogeneous supershear earthquake rupture propagation: Simulations and comparison with observations
A. Bizzarri, Eric M. Dunham, P. Spudich
2010, Journal of Geophysical Research B: Solid Earth (115) B08301
We study how heterogeneous rupture propagation affects the coherence of shear and Rayleigh Mach wavefronts radiated by supershear earthquakes. We address this question using numerical simulations of ruptures on a planar, vertical strike-slip fault embedded in a three-dimensional, homogeneous, linear elastic half-space. Ruptures propagate spontaneously in accordance with a linear...
Vegetation monitoring for Guatemala: a comparison between simulated VIIRS and MODIS satellite data
Vijendra K. Boken, Gregory L. Easson, James Rowland
2010, Geocarto International (25) 617-627
The advanced very high resolution radiometer (AVHRR) and moderate resolution imaging spectroradiometer (MODIS) data are being widely used for vegetation monitoring across the globe. However, sensors will discontinue collecting these data in the near future. National Aeronautics and Space Administration is planning to launch a new sensor, visible infrared imaging...
Postseismic relaxation following the 1994 Mw6.7 Northridge earthquake, southern California
J.C. Savage, J. L. Svarc
2010, Journal of Geophysical Research B: Solid Earth (115)
We have reexamined the postearthquake deformation of a 65 km long linear array of 11 geodetic monuments extending north–south across the rupture (reverse slip on a blind thrust dipping 40°S–20°W) associated with the 1994 Mw6.7 Northridge earthquake. That array was surveyed frequently in the interval from 4 to 2650 days...
Quasi-periodic recurrence of large earthquakes on the southern San Andreas fault
Katherine M. Scharer, Glenn P. Biasi, Ray J. Weldon II, Tom E. Fumal
2010, Geology (38) 555-558
It has been 153 yr since the last large earthquake on the southern San Andreas fault (California, United States), but the average interseismic interval is only ~100 yr. If the recurrence of large earthquakes is periodic, rather than random or clustered, the length of this period is notable and would...
Analysis of nonvolcanic tremor on the San Andreas Fault near Parkfield, CA using U.S. Geological Survey Parkfield Seismic Array
Jon B. Fletcher, Lawrence M. Baker
2010, Journal of Geophysical Research B: Solid Earth (115)
Reports by Nadeau and Dolenc (2005) that tremor had been detected near Cholame Valley spawned an effort to use UPSAR (U. S. Geological Survey Parkfield Seismic Array) to study characteristics of tremor. UPSAR was modified to record three channels of velocity at 40–50 sps continuously in January 2005 and ran...
Scientific drilling into the San Andreas Fault Zone
Mark Zoback, Stephen Hickman, William Ellsworth
2010, Eos, Transactions, American Geophysical Union (91) 197-199
This year, the world has faced energetic and destructive earthquakes almost every month. In January, an M = 7.0 event rocked Haiti, killing an estimated 230,000 people. In February, an M = 8.8 earthquake and tsunami claimed over 500 lives and caused billions of dollars of damage in Chile. Fatal...
Wind-enhanced resuspension in the shallow waters of South San Francisco Bay: Mechanisms and potential implications for cohesive sediment transport
Andreas Brand, Jessica R. Lacy, Kevin Hsu, Daniel Hoover, Steve Gladding, Mark T. Stacey
2010, Journal of Geophysical Research C: Oceans (115)
We investigated the driving forces of sediment dynamics at the shoals in South San Francisco Bay. Two stations were deployed along a line perpendicular to a 14 m deep channel, 1000 and 2000 m from the middle of the channel. Station depths were 2.59 and 2.19 m below mean lower...
The North American upper mantle: Density, composition, and evolution
Walter D. Mooney, Mikhail K. Kaban
2010, Journal of Geophysical Research B: Solid Earth (115)
The upper mantle of North America has been well studied using various seismic methods. Here we investigate the density structure of the North American (NA) upper mantle based on the integrative use of the gravity field and seismic data. The basis of our study is the removal of the gravitational...
Worldwide status of burbot and conservation measures
Martin A. Stapanian, Vaughn L. Paragamian, Charles P. Madenjian, James R. Jackson, Jyrki Lappalainen, Matthew J. Evenson, Matthew D. Neufeld
2010, Fish and Fisheries (11) 34-56
Although burbot (Lota lota Gadidae) are widespread and abundant throughout much of their natural range, there are many populations that have been extirpated, endangered or are in serious decline. Due in part to the species’ lack of popularity as a game and commercial fish, few regions consider burbot in management...
Geophysical Research Letters: New policies improve top-cited geosciences journal
Eric Calais, Noah Diffenbaugh, Paolo D'Odorico, Ruth Harris, Wolfgang Knorr, Benoit Lavraud, Anne Mueller, William Peterson, Eric Rignot, Meric Srokosz, Peter Strutton, Geoff Tyndall, Michael Wysession, Paul Williams
2010, Eos, Transactions, American Geophysical Union (91) 337-337
Geophysical Research Letters (GRL) is the American Geophysical Union's premier journal of fast, groundbreaking communication. It rapidly publishes high- impact,letter-length articles, and it is the top-cited multidisciplinary geosciences journal over the past 10 years, with an impact factor that increased again in 2009, to 3.204. For manuscripts submitted to GRL,...