Performance of map symbol and label design with format and display resolution options through scale for the national map
C. A. Brewer, C. L. Hanchett, B. P. Butterfield, E. Lynn Usery
2010, Conference Paper
Symbol and label design for U.S. topographic mapping using data from The National Map has been progressing, partly in support of research by Buttenfield and Stanislawski on hydrographic generalization, and is sponsored by CEGIS, the USGS Center of Excellence for Geospatial Information Science. The work also seeks to make the...
Geological sources of radionuclides and arsenic in Triassic age rift-valley sediments (Newark Supergroup) and implications for distribution in groundwater in Mercer County, New Jersey
Zoltan Szabo, Julia Barringer, Steve Spayd
2010, Conference Paper, Geology of the greater Trenton area and its impact on the capital city: Twenty-seventh Annual Meeting Geological Association of New Jersey : October 8-9, 2010: Field guide and proceedings
No abstract available....
Developing a spatially distributed terrestrial biogeochemical cycle modeling system to support the management of Fort Benning and its surrounding areas
Shuguang Liu, Larry L. Tieszen, Shuqing Zhao, Zhen Li, Jinxun Liu
2010, Report
The overarching goal of this project is to develop an advanced, spatially distributed biogeochemical cycle modeling system to simulate the dynamics of ecosystem C and N cycles under historical, current, and future land use and disturbances scenarios. The modeling system and simulated results were used to facilitate the evaluation of...
Distribution of Escherichia coli and Enterococci in water, sediments, and bank soils along North Shore Channel between Bridge Street and Wilson Avenue, Metropolitan Water Reclamation District of Greater Chicago
Muruleedhara Byappanahalli, Richard L. Whitman, Dawn Shively, Katarzyna Przybyla-Kelly, Ashley M. Lukasik
2010, Report
The Metropolitan Water Reclamation District of Greater Chicago (MWRDGC) wished to know the distribution and potential sources of fecal indicator bacteria, E. coli and enterococci, in water, sediments, and upland soils along an upstream and downstream portion of the North Shore Channel (NSC) that is the receiving stream for the...
Streamflow gain-loss characteristics of Elkhead Creek downstream from Elkhead Reservoir near Craig, Colorado, 2009
Barbara C. Ruddy
2010, Scientific Investigations Report 2010-5198
The U.S. Geological Survey (USGS), in cooperation with the Colorado Water Conservation Board, the Upper Colorado River Endangered Fish Recovery Program (UCREFRP), Colorado Division of Water Resources, and City of Craig studied the gain-loss characteristics of Elkhead Creek downstream from Elkhead Reservoir to the confluence with the Yampa River during...
Influence of drought conditions on brown trout biomass and size structure in the Black Hills, South Dakota
Daniel A. James, Jerry W. Wilhite, Steven R. Chipps
2010, North American Journal of Fisheries Management (30) 791-798
We evaluated the influence of drought conditions on the biomass of brown trout Salmo trutta in Spearfish Creek, upper Rapid Creek, and lower Rapid Creek in the Black Hills of western South Dakota. Stream discharge, mean summer water temperature, the biomass of juvenile and adult brown trout, and brown trout size structure...
Erosion of tilted fault blocks and deposition of coarse sediments in half-graben basins during late stages of extension: Gold Butte area, Basin and Range Province
Keith A. Howard, Sue Beard, M. A. Kuntz, Michael J. Kunk, Andrei M. Sarna-Wojcicki, M. E. Perkins, Ivo Lucchitta
2010, GSA Special Papers (463) 147-170
The provenance and stratigraphic architecture of basin-filling Miocene sediments around the Gold Butte area, southern Nevada, and adjacent highlands record the erosion of fault blocks that progressively tilted during extension. This study focuses especially on upper Miocene correlatives of the red sandstone unit and the Muddy Creek Formation that were...
Forward to the conservation, biology, and natural history of North American crayfishes
Zachary J. Loughman, Thomas P. Simon, Stuart A. Welsh
2010, Southeastern Naturalist (9) 1-10
No abstract available....
Topographic evolution of sandbars: Flume experiment and computational modeling
Paul J. Kinzel, Jonathan M. Nelson, Richard R. McDonald, Brandy L. Logan
2010, Conference Paper
Measurements of sandbar formation and evolution were carried out in a laboratory flume and the topographic characteristics of these barforms were compared to predictions from a computational flow and sediment transport model with bed evolution. The flume experiment produced sandbars with approximate mode 2, whereas numerical simulations produced a bed...
Methods based on surface-water data
Richard W. Healy
2010, Book chapter, Estimating groundwater recharge
Streamflow data are commonly used to estimate recharge rates in humid and subhumid regions, in part because of the abundance of streamflow data and the availability of computer programs for analyzing those data. Most of the methods described in this chapter are easy to use, but application of any of...
Recently active traces of the Bartlett Springs Fault, California: A digital database
James J. Lienkaemper
2010, Data Series 541
The purpose of this map is to show the location of and evidence for recent movement on active fault traces within the Bartlett Springs Fault Zone, California. The location and recency of the mapped traces is primarily based on geomorphic expression of the fault as interpreted from large-scale aerial photography....
Mechanics and modeling of flow, sediment transport and morphologic change in riverine lateral separation zones
Brandy L. Logan, Jonathan M. Nelson, Richard R. McDonald, Scott Wright
2010, Conference Paper, Proceedings of the 2nd joint federal interagency conference (9th federal interagency sedimentation conference and 4th federal interagency hydrologic modeling conference)
Lateral separation zones or eddies in rivers are critically important features for sediment storage and for a variety of roles they play in riparian and aquatic ecology. As part of a larger effort to predict the morphology of lateral separation zones in the Colorado River in Grand Canyon for a...
Increasing precision of turbidity-based suspended sediment concentration and load estimates
John D. Jastram, Carl E. Zipper, Lucian W. Zelanzny, Kenneth Hyer
2010, Journal of Environmental Quality (39) 1306-1316
Turbidity is an effective tool for estimating and monitoring suspended sediments in aquatic systems. Turbidity can be measured in situ remotely and at fine temporal scales as a surrogate for suspended sediment concentration (SSC), providing opportunity for a more complete record of SSC than is possible with physical sampling approaches....
Trait-based approaches in the analysis of stream fish communities
Emmanuel Frimpong, Paul L. Angermeier
2010, Conference Paper, American Fisheries Society Symposium
Species traits are used to study the functional organization of fish communities for a range of reasons, from simply reducing data dimensionality to providing mechanistic explanations for observed variation in communities. Ecological and life history traits have been used to understand the basic ecology of fishes and predict (1) species...
High-resolution receiver function imaging reveals Colorado Plateau lithospheric architecture and mantle-supported topography
Dorothy L. Domingo, R. Aster, S. Grand, J Ni, W.S. Baldridge, David C. Wilson USGS
2010, Geophysical Research Letters (37)
After maintaining elevations near sea level for over 500 million years, the Colorado Plateau (CP) has a present average elevation of 2 km. We compute new receiver function images from the first dense seismic transect to cross the plateau that reveal a central CP crustal thickness of 42–50 km thinning...
Effects of groundwater-flow paths on nitrate concentrations across two riparian forest corridors
Gary K. Speiran
2010, Journal of the American Water Resources Association (46) 246-260
Groundwater levels, apparent age, and chemistry from field sites and groundwater-flow modeling of hypothetical aquifers collectively indicate that groundwater-flow paths contribute to differences in nitrate concentrations across riparian corridors. At sites in Virginia (one coastal and one Piedmont), lowland forested wetlands separate upland fields from nearby surface waters (an estuary...
GAGES: A stream gage database for evaluating natural and alteredflow conditions in the conterminous United States
James A. Falcone, Daren M. Carlisle, David M. Wolock, Michael R. Meador
2010, Ecology (91) 621-621
Stream flow is a controlling element in the ecology of rivers and streams. Knowledge of the natural flow regime facilitates the assessment of whether specific hydrologic attributes have been altered by humans in a particular stream and the establishment of specific goals for stream-flow restoration. Because most streams are ungaged...
Regional variation in diets of breeding Red-shouldered hawks
Bradley N. Strobel, Clint W. Boal
2010, Wilson Journal of Ornithology (122) 68-74
We collected data on breeding season diet composition of Red-shouldered Hawks (Buteo lineatus) in south Texas and compared these data, and those reported from studies elsewhere to examine large scale spatial variation in prey use in eastern North America. Red-shouldered Hawk diets aligned into two significantly different groups, which appear...
Storm surge modeling and applications in coastal areas
Shisir K. Dube, Tad S. Murty, Jesse C. Feyen, Reggina Cabrera, Bruce A. Harper, Jerad D. Bales, Saud A. Amer
2010, Book chapter, World Scientific Series on Asia-Pacific Weather and Climate
This chapter introduces the reader to a wide spectrum of storm surge modeling systems used to assess the impact of tropical cyclones, covering a range of numerical methods, model domains, forcing and boundary conditions, and purposes. New technologies to obtain data such as deployment of temporary sensors and remote sensing...
Comparison of atmospheric mercury speciation and deposition at nine sites across central and eastern North America
Mark A. Engle, Michael T. Tate, David P. Krabbenhoft, James J Schauer, Allan Kolker, James B. Shanley, Michael Bothner
2010, Journal of Geophysical Research (115)
This study presents >5 cumulative years of tropospheric mercury (Hg) speciation measurements, over the period of 2003–2009, for eight sites in the central and eastern United States and one site in coastal Puerto Rico. The purpose of this research was to identify local and regional processes that impact Hg speciation...
Relationship between fibropapillomatosis and environmental quality: A case study with Chelonia mydas off Brazil
Robson G. Santos, Agnaldo Silva Martins, E. Torezani, Cecilia Baptistotte, Julyana da Nobrega Farias, Antunes Paulo Horta, Thierry M. Work, G.H. Balazs
2010, Diseases of Aquatic Organisms (89) 87-95
We documented the presence of fibropapillomatosis (FP), a debilitating tumor-forming disease, in marine turtles in Espírito Santo Bay (Brazil) from March 2007 to April 2008, and assessed the value of a specific environmental index for predicting the prevalence of FP. Turtles were captured monthly with entanglement nets and scored for...
Salmon carcasses increase stream productivity more than inorganic fertilizer pellets: A test on multiple trophic levels in streamside experimental channels
Mark S. Wipfli, John P. Hudson, John P. Caouette, N.L. Mitchell, Joanna L. Lessard, Ron A. Heintz, D. T. Chaloner
2010, Transactions of the American Fisheries Society (139) 824-839
Inorganic nutrient amendments to streams are viewed as possible restoration strategies for re-establishing nutrients and stream productivity throughout the western coast of North America, where salmon runs and associated marine-derived nutrient subsidies have declined. In a mesocosm experiment, we examined the short-term (6 weeks) comparative effects of artificial nutrient pellets...
Archeomagnetic dating in western North America: An updated reference curve based on paleomagnetic and archeomagnetic data sets
Jonathan T. Hagstrum, Eric Blinman
2010, Geochemistry, Geophysics, Geosystems (11)
[1] A robust database of paleomagnetic (PM) and archeomagnetic (AM) data for western North America covering the past 4 millennia is assembled from three data sets: (1) published PM data for dated lava flows, (2) recently published AM data generated by R. L. DuBois, and (3) published AM data generated...
Estimating carcass persistence and scavenging bias in a human‐influenced landscape in western Alaska
Paul L. Flint, Ellen W. Lance, Kristine M. Sowl, Tyrone F. Donnelly
2010, Journal of Field Ornithology (81) 206-214
We examined variation in persistence rates of waterfowl carcasses placed along a series of transects in tundra habitats in western Alaska. This study was designed to assess the effects of existing tower structures and was replicated with separate trials in winter, summer and fall as both the resident avian population...
Topographic complexity and roughness of a tropical benthic seascape
David G. Zawada, Clifford J. Hearn, Gregory Piniak
2010, Geophysical Research Letters (37)
Topographic complexity is a fundamental structural property of benthic marine ecosystems that exists across all scales and affects a multitude of processes. Coral reefs are a prime example, for which this complexity has been found to impact water flow, species diversity, nutrient uptake, and wave-energy dissipation, among other properties. Despite...
