High geologic slip rates since early Pleistocene Initiation of the San Jacinto and San Felipe fault zones in the San Andreas fault system: southern California, USA
Susanne U. Janecke, Rebecca J. Dorsey, David Forand, Alexander N. Steely, Stefan Kirby, Andrew Lutz, Bernard Housen, Benjamin Belgarde, Victoria E. Langenheim, Tammy M. Rittenour
2011, Special Paper of the Geological Society of America (479)
The San Jacinto right-lateral strike-slip fault zone is crucial for understanding plate-boundary dynamics, regional slip partitioning, and seismic hazards within the San Andreas fault system of southern California, yet its age of initiation and long-term average slip rate are controversial. This synthesis of prior and new detailed studies in the...
Impacts of deer herbivory on vegetation in Rock Creek Park, 2001-2009
Cairn C. Kraft, Jeff S. Hatfield
2011, Natural Resource Report NPS/NCR/NCRO/NRTR - 2011/001
Starting in 2001, vegetation data have been collected annually in 16 study modules consisting of paired (1x4 m) fenced plots and unfenced control plots located in the upland forests of Rock Creek Park, Washington, D.C. Vegetation data collected from 2001-2009 have been analyzed to determine impacts of deer herbivory on...
Postfledging survival of Grasshopper Sparrows in grasslands managed with fire and grazing
Torre J. Hovick, James R. Miller, Rolf R. Koford, David M. Engle, Diane M. Debinski
2011, Condor (113) 429-437
More accurate estimates of survival after nestlings fledge are needed for population models to be parameterized and population dynamics to be understood during this vulnerable life stage. The period after fledging is the time when chicks learn to fly, forage, and hide from predators. We monitored postfledging survival, causespecific mortality,...
Assessing the effects of catch and release regulations on a quality adfluvial brook trout population using a computer based age-structure model
Casey A.L. Risley, Joseph D. Zydlewski
2011, North American Journal of Fisheries Management (30) 1434-1444
Assessing the Effects of Catch-and-Release Regulations on a Brook Trout Population Using an Age-Structured Model: North American Journal of Fisheries Management: Vol 30, No 6 <script src="https://www.colwiz.com/js/webpdf/ireader.js?ts=1510012800" type="mce-text/javascript"...
Influence of Physiochemical and watershed characteristics on mercury concentration in walleye, Sander vitreus, M.
Cari-Ann Hayer, Steven R. Chipps, James J. Stone
2011, Bulletin of Environmental Contamination and Toxicology (86) 163-167
Elevated mercury concentration has been documented in a variety of fish and is a growing concern for human consumption. Here, we explore the influence of physiochemical and watershed attributes on mercury concentration in walleye (Sander vitreus, M.) from natural, glacial lakes in South Dakota. Regression analysis showed...
Nest success of northern bobwhite on managed and unmanaged landscapes in southeast Iowa
Lisa M. Potter, David L. Otis, Todd R. Bogenschutz
2011, Journal of Wildlife Management (75) 46-51
Range‐wide declines in northern bobwhite populations (Colinus virginianus) have been attributed to concomitant loss of breeding habitat. Bobwhite management efforts to restore this habitat resource can be informed by empirical studies of associations between breeding success and multi‐scale habitat attributes. We compared bobwhite nest success in 2 southern Iowa landscapes...
An approach to modeling coupled thermal-hydraulic-chemical processes in geothermal systems
Jennifer Palguta, Colin F. Williams, Steven E. Ingebritsen, Stephen H. Hickman, Eric Sonnenthal
2011, Conference Paper, Proceedings, thirty-sixth Workshop on Geothermal Reservoir Engineering
Interactions between hydrothermal fluids and rock alter mineralogy, leading to the formation of secondary minerals and potentially significant physical and chemical property changes. Reactive transport simulations are essential for evaluating the coupled processes controlling the geochemical, thermal and hydrological evolution of geothermal systems. The objective of this preliminary investigation is...
Connection equation and shaly-sand correction for electrical resistivity
Myung W. Lee
2011, Scientific Investigations Report 2011-5005
Estimating the amount of conductive and nonconductive constituents in the pore space of sediments by using electrical resistivity logs generally loses accuracy where clays are present in the reservoir. Many different methods and clay models have been proposed to account for the conductivity of clay (termed the shaly-sand correction). In...
Estimates of tracer-based piston-flow ages of groundwater from selected sites: National Water-Quality Assessment Program, 1992–2005
Stephen R. Hinkle, Stephanie D. Shapiro, Niel Plummer, Eurybiades Busenberg, Peggy K. Widman, Gerolamo C. Casile, Julian E. Wayland
2011, Scientific Investigations Report 2010-5229
This report documents selected age data interpreted from measured concentrations of environmental tracers in groundwater from 1,399 National Water-Quality Assessment (NAWQA) Program groundwater sites across the United States. The tracers of interest were chlorofluorocarbons (CFCs), sulfur hexafluoride (SF6), and tritium/helium-3 (3H/3He).Tracer data compiled for this analysis primarily were from wells...
Effects of Simulated Land-Use Changes on Water Quality of Lake Maumelle, Arkansas
Rheannon M. Hart, Drew A. Westerman, James C. Petersen, W. Reed Green, Jeanne L. De Lanois
2011, Scientific Investigations Report 2010-5239
Lake Maumelle is one of two principal drinking-water supplies for the Little Rock and North Little Rock metropolitan areas. Lake Maumelle and the Maumelle River (its primary tributary) are more pristine than most other reservoirs and streams in the region. However, as the Lake Maumelle watershed becomes increasingly more urbanized...
An analytical model to predict dune and cliff notching due to wave impact
Magnus Per Larson, Tsuguo Sunamura, Li H. Erikson, Atilla Bayram, Hans Hanson
Jane McKee Smith, Patrick Lynett, editor(s)
2011, Conference Paper, Proceedings of 32nd Conference on Coastal Engineering
A model was developed to calculate the evolution of a notch in a dune or cliff due to wave impact. Analytical solutions were derived to the model for schematized conditions regarding forcing and dune/cliff properties. Comparisons were made with laboratory experiments where the time evolution of the notch was measured....
Sedimentology and reservoir heterogeneity of a valley-fill deposit– A field guide to the Dakota Sandstone of the San Rafael Swell, Utah
Mark A. Kirschbaum, Christopher J. Schenk
2011, Scientific Investigations Report 2010-5222
Valley-fill deposits form a significant class of hydrocarbon reservoirs in many basins of the world. Maximizing recovery of fluids from these reservoirs requires an understanding of the scales of fluid-flow heterogeneity present within the valley-fill system. The Upper Cretaceous Dakota Sandstone in the San Rafael Swell, Utah contains well exposed, relatively...
Silver nanoparticles: Behaviour and effects in the aquatic environment
Julia Fabrega, Samuel N. Luoma, Charles R. Tyler, Tamara Galloway, Jamie R. Lead
2011, Environment International (37) 517-531
This review summarises and evaluates the present knowledge on the behaviour, the biological effects and the routes of uptake of silver nanoparticles (Ag NPs) to organisms, with considerations on the nanoparticle physicochemistry in the ecotoxicity testing systems used. Different types of Ag NP syntheses, characterisation techniques and predicted current and future concentrations in the environment...
Crude oil at the Bemidji Site: 25 years of monitoring, modeling, and understanding
Hedeff I. Essaid, Barbara A. Bekins, William N. Herkelrath, Geoffrey N. Delin
2011, Ground Water (49) 706-726
The fate of hydrocarbons in the subsurface near Bemidji, Minnesota, has been investigated by a multidisciplinary group of scientists for over a quarter century. Research at Bemidji has involved extensive investigations of multiphase flow and transport, volatilization, dissolution, geochemical interactions, microbial populations, and biodegradation with the...
A tree-ring reconstruction of the salinity gradient in the northern estuary of San Francisco Bay
David W. Stahle, Daniel Griffin, Malcolm K. Cleaveland, Jesse R. Edmondson, D.J. Burnette, John T. Abatzoglou, Kelly Redmond, David M. Meko, Michael D. Dettinger, Daniel Cayan, Matthew D. Therrell
2011, San Francisco Estuary and Watershed Science (9)
Blue oak tree-ring chronologies correlate highly with winter–spring precipitation totals over California, with Sacramento and San Joaquin river stream flow, and with seasonal variations in the salinity gradient in San Francisco Bay. The convergence of fresh and saline currents can influence...
Multilevel groundwater monitoring of hydraulic head and temperature in the eastern Snake River Plain aquifer, Idaho National Laboratory, Idaho, 2007-08
Jason C. Fisher, Brian V. Twining
2011, Scientific Investigations Report 2010-5253
During 2007 and 2008, the U.S. Geological Survey, in cooperation with the U.S. Department of Energy, collected quarterly depth-discrete measurements of fluid pressure and temperature in six boreholes located in the eastern Snake River Plain aquifer of Idaho. Each borehole was instrumented with a multilevel monitoring system consisting of a...
Population estimates and monitoring guidelines for endangered Laysan Teal, Anas Laysanensis, at Midway Atoll: Pilot study results 2008-2010.
Michelle H. Reynolds, Kevin W. Brinck, Leona Laniawe
2011, Technical Report HCSU-021
Accurate estimates of population size are often crucial to determining status and planning recovery of endangered species. The ability to detect trends in survival and population size over time enables conservation managers to make effective decisions for species and refuge management. During 2004–2007, the translocated population of endangered Laysan Teal...
Mountain Glaciers and Ice Caps
Maria Ananichheva, Anthony Arendt, Jon-Ove Hagen, Regine Hock, Edward G. Josberger, R. Dan Moore, William Tad Pfeffer, Gabriel J. Wolken
2011, Book chapter, Snow, Water, Ice and Permafrost in the Arctic (SWIPA) 2011
In addition to the Greenland Ice Sheet, the Arctic contains a diverse array of smaller glaciers ranging from small cirque glaciers to large ice caps with areas up to 20 000 km 2 . Together, these glaciers cover an area of more than 400 000 km 2 , over half the global area of...
Overview of the ARkStorm scenario
Keith Porter, Anne Wein, Charles N. Alpers, Allan Baez, Patrick L. Barnard, James Carter, Alessandra Corsi, James Costner, Dale Cox, Tapash Das, Mike Dettinger, James Done, Charles Eadie, Marcia Eymann, Justin Ferris, Prasad Gunturi, Mimi Hughes, Robert Jarrett, Laurie Johnson, Hanh Dam Le-Griffin, David Mitchell, Suzette Morman, Paul Neiman, Anna Olsen, Suzanne Perry, Geoffrey Plumlee, Martin Ralph, David Reynolds, Adam Rose, Kathleen Schaefer, Julie Serakos, William Siembieda, Jonathan D. Stock, David Strong, Ian Sue Wing, Alex Tang, Pete Thomas, Ken Topping, Chris Wills, Lucile Jones
2011, Open-File Report 2010-1312
The U.S. Geological Survey, Multi Hazards Demonstration Project (MHDP) uses hazards science to improve resiliency of communities to natural disasters including earthquakes, tsunamis, wildfires, landslides, floods and coastal erosion. The project engages emergency planners, businesses, universities, government agencies, and others in preparing for major natural disasters. The project also helps...
Approaches to highly parameterized inversion: Pilot-point theory, guidelines, and research directions
John E. Doherty, Michael N. Fienen, Randall J. Hunt
2011, Scientific Investigations Report 2010-5168
Pilot points have been used in geophysics and hydrogeology for at least 30 years as a means to bridge the gap between estimating a parameter value in every cell of a model and subdividing models into a small number of homogeneous zones. Pilot points serve as surrogate parameters at which...
Characterization of hydrology and salinity in the Dolores project area, McElmo Creek region, southwest Colorado, water years 1978-2006
Rodney J. Richards, Kenneth J. Leib
2011, Scientific Investigations Report 2010-5218
Increasing salinity loading in the Colorado River has become a major concern for agricultural and municipal water supplies. The Colorado Salinity Control Act was implemented in 1974 to protect and enhance the quality of water in the Colorado River Basin. The U.S. Geological Survey, in cooperation with the Bureau of...
Distribution and habitat associations of breeding secretive marsh birds in Louisiana's Mississippi Alluvial Valley
Jonathan J. Valente, Sammy L. King, R. Randy Wilson
2011, Wetlands (31) 1-10
Populations of many North American secretive marsh birds (SMBs) have declined in recent decades, partially as a function of wetland loss. Protecting and restoring appropriate habitat for these species is contingent upon understanding the habitat features they utilize. We investigated breeding distributions of SMBs in northeast Louisiana at 118 wetlands...
How systematic age underestimation can impede understanding of fish population dynamics: Lessons learned from a Lake Superior cisco stock
Daniel L. Yule, Jason D. Stockwell, J.A. Black, Ken I. Cullis, Gary A. Cholwek, Jared T. Myers
2011, Transactions of the American Fisheries Society (137) 481-495
Systematic underestimation of fish age can impede understanding of recruitment variability and adaptive strategies (like longevity) and can bias estimates of survivorship. We suspected that previous estimates of annual survival (S; range = 0.20-0.44) for Lake Superior ciscoes Coregonus artedi developed from scale ages were biased low. To test this hypothesis, we...
Structural and functional effects of herbicides on non-target organisms in aquatic ecosystems with an emphasis on atrazine
James Fairchild
Andreas Kortekamp, editor(s)
2011, Book chapter, Herbicides and environment
Herbicide use has increased dramatically around the world over the past 6 decades (Gianessi and Reigner, 2007). Few herbicides were in use in the 1950s. However, by 2001 approximately 1.14 billion kilograms of herbicides were applied globally for the control of undesireable vegetation in agricultural, silvicultural, lawncare, aquacultural, and irrigation/recreational...
Habitat associations of small fishes around islands in the upper Mississippi River
Barry L. Johnson, Cecil A. Jennings
2011, North American Journal of Fisheries Management (18) 327-336
In large rivers, islands provide a variety of habitat types and increase habitat heterogeneity. Creating or modifying islands with dredged sediments from channel maintenance operations provides an opportunity to enhance habitat features that might promote certain fish communities or general fish abundance. To determine associations between fish species and habitat...
