Predictive uncertainty analysis of a saltwater intrusion model using null-space Monte Carlo
Daan Herckenrath, Christian D. Langevin, John Doherty
2011, Water Resources Research (47)
Because of the extensive computational burden and perhaps a lack of awareness of existing methods, rigorous uncertainty analyses are rarely conducted for variable-density flow and transport models. For this reason, a recently developed null-space Monte Carlo (NSMC) method for quantifying prediction uncertainty was tested for a synthetic saltwater intrusion model...
Timing, distribution, amount, and style of Cenozoic extension in the northern Great Basin
Christopher D. Henry, Allen J. McGrew, Joseph P. Colgan, Arthur W. Snoke, Matthew E. Brueseke
2011, GSA Field Guides (21) 27-66
This field trip examines contrasting lines of evidence bearing on the timing and structural style of Cenozoic (and perhaps late Mesozoic) extensional deformation in northeastern Nevada. Studies of metamorphic core complexes in this region report extension beginning in the early Cenozoic or even Late Cretaceous, peaking in the Eocene and...
Effects of dams in river networks on fish assemblages in non-impoundment sections of rivers in Michigan and Wisconsin, USA
Jana S. Stewart, Lizhu Wang, Dana M. Infante, John D. Lyons, Arthur Cooper
2011, River Research and Applications (27) 473-487
Regional assessment of cumulative impacts of dams on riverine fish assemblages provides resource managers essential information for dam operation, potential dam removal, river health assessment and overall ecosystem management. Such an assessment is challenging because characteristics of fish assemblages are not only affected by dams, but also influenced by natural...
Development of a bioenergetics model for age-0 American Shad
Sally T. Sauter
2011, Report, Impact of American Shad in the Columbia River
Bioenergetics modeling can be used as a tool to investigate the impact of non-native age-0 American shad (Alosa sapidissima) on reservoir and estuary food webs. The model can increase our understanding of how these fish influence lower trophic levels as well as predatory fish populations that feed on juvenile salmonids....
Verification of a ‘freshwater-type’ life history variant of juvenile American shad in the Columbia River
Lisa A. Wetzel, Kimberly A. Larsen, Michael J. Parsley, Christian E. Zimmerman
2011, Report
American shad are native to the Atlantic coast of North America and were successfully introduced to the Pacific coast in the 1870s. They are now more abundant in the Columbia River than are its native salmon. As in their native range, Columbia River American shad are anadromous and have been...
Climate change links fate of glaciers and an endemic alpine invertebrate
Clint C. Muhlfeld, J. Joseph Giersch, F. Richard Hauer, Gregory T. Pederson, Gordon Luikart, Douglas P. Peterson, Christopher C. Downs, Daniel B. Fagre
2011, Climatic Change (106) 337-345
Climate warming in the mid- to high-latitudes and high-elevation mountainous regions is occurring more rapidly than anywhere else on Earth, causing extensive loss of glaciers and snowpack. However, little is known about the effects of climate change on alpine stream biota, especially invertebrates. Here, we show a strong linkage between...
Development of a bioenergetics model for age-0 American shad
Sally T. Sauter
2011, Book chapter, Impact of American shad in the Columbia River
Bioenergetics modeling can be used as a tool to investigate the impact of non-native age-0 American shad (Alosa sapidissima) on reservoir and estuary food webs. The model can increase our understanding of how these fish influence lower trophic levels as well as predatory fish populations that feed on juvenile salmonids....
A numerical model investigation of the formation and persistence of an erosion hotspot
Jeff E. Hansen, Edwin Elias, Jeffrey H. List, Patrick L. Barnard
2011, Conference Paper, The proceedings of the Coastal Sediments 2011
A Delft3D-SWAN coupled flow and wave model was constructed for the San Francisco Bight with high-resolution at 7 km-long Ocean Beach, a high-energy beach located immediately south of the Golden Gate, the sole entrance to San Francisco Bay. The model was used to investigate tidal and wave-induced flows, basic forcing...
Pliocene climate lessons
Marci M. Robinson
2011, American Scientist (99) 228-235
The middle portion of the Pliocene Epoch—about three million years ago—is the most recent period when global temperatures were sustained at levels comparable to those we may see at the end of this century due to climate change. One way to seek a more accurate view of a warmer Earth...
Two-dimensional streamflow simulations of the Jordan River, Midvale and West Jordan, Utah
Terry A. Kenney, Michael L. Freeman
2011, Scientific Investigations Report 2011-5043
The Jordan River in Midvale and West Jordan, Utah, flows adjacent to two U.S. Environmental Protection Agency Superfund sites: Midvale Slag and Sharon Steel. At both sites, geotechnical caps extend to the east bank of the river. The final remediation tasks for these sites included the replacement of a historic...
Status of groundwater quality in the Southern, Middle, and Northern Sacramento Valley study units, 2005-08: California GAMA Priority Basin Project
George L. V Bennett V, Miranda S. Fram, Kenneth Belitz
2011, Scientific Investigations Report 2011-5002
Groundwater quality in the Southern, Middle, and Northern Sacramento Valley study units was investigated as part of the Priority Basin Project of the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The study units are located in California’s Central Valley and include parts of Butte, Colusa, Glenn, Placer, Sacramento, Shasta, Solano,...
EAARL Coastal Topography--Cape Canaveral, Florida, 2009: First Surface
J.M. Bonisteel-Cormier, Amar Nayegandhi, Nathaniel Plant, C. W. Wright, D.B. Nagle, K.S. Serafin, E.S. Klipp
2011, Data Series 585
These remotely sensed, geographically referenced elevation measurements of lidar-derived first-surface (FS) topography datasets were produced collaboratively by the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL, and the National Aeronautics and Space Administration (NASA), Kennedy Space Center, FL. This project provides highly detailed and...
Use of a two-dimensional hydrodynamic model to evaluate extreme flooding and transport of dissolved solids through Devils Lake and Stump Lake, North Dakota, 2006
Rochelle A. Nustad, Tamara M. Wood, Jerad D. Bales
2011, Scientific Investigations Report 2011-5035
The U.S. Geological Survey in cooperation with the North Dakota Department of Transportation, North Dakota State Water Commission, and U.S. Army Corps of Engineers, developed a two-dimensional hydrodynamic model of Devils Lake and Stump Lake, North Dakota to be used as a hydrologic tool for evaluating the effects of different...
Isostatic gravity map of the Point Sur 30' x 60' quadrangle and adjacent areas, California
J. T. Watt, R. L. Morin, V.E. Langenheim
2011, Open-File Report 2011-1036
This isostatic residual gravity map is part of a regional effort to investigate the tectonics and water resources of the central Coast Range. This map serves as a basis for modeling the shape of basins and for determining the location and geometry of faults in the area. Local spatial variations...
The Cannery Formation: Devonian to Early Permian arc-marginal deposits within the Alexander Terrane, southeastern Alaska
Susan M. Karl, Paul W. Layer, Anita G. Harris, Peter J. Haeussler, Benita L. Murchey
2011, Professional Paper 1776-B
The Cannery Formation consists of green, red, and gray ribbon chert, siliceous siltstone, graywacke-chert turbidites, and volcaniclastic sandstone. Because it contains early Permian fossils at and near its type area in Cannery Cove, on Admiralty Island in southeastern Alaska, the formation was originally defined as a Permian stratigraphic unit. Similar...
Onshore and offshore geologic map of the Coal Oil Point area, southern California
Pete Dartnell, James E. Conrad, Richard G. Stanley, Guy R. Guy R. Cochrane
2011, Scientific Investigations Map 3124
Geologic maps that span the shoreline and include both onshore and offshore areas are potentially valuable tools that can lead to a more in depth understanding of coastal environments. Such maps can contribute to the understanding of shoreline change, geologic hazards, both offshore and along-shore sediment and pollutant transport. They...
Historical bathymetry and bathymetric change in the Mississippi-Alabama coastal region, 1847-2009
Noreen A. Buster, Robert A. Morton
2011, Scientific Investigations Map 3154
Land loss and seafloor change around the Mississippi and Alabama (MS-AL) barrier islands are of great concern to the public and to local, state, and federal agencies. The islands provide wildlife protected areas and recreational land, and they serve as a natural first line of defense for the mainland against...
Exploring sensitivity of a multistate occupancy model to inform management decisions
A.W. Green, L.L. Bailey, J.D. Nichols
2011, Journal of Applied Ecology (48) 1007-1016
1. Dynamic occupancy models are often used to investigate questions regarding the processes that influence patch occupancy and are prominent in the fields of population and community ecology and conservation biology. Recently, multistate occupancy models have been developed to investigate dynamic systems involving more than one occupied state, including reproductive states,...
Flow speed estimated by inverse modeling of sandy sediment deposited by the 29 September 2009 tsunami near Satitoa, east Upolu, Samoa
Bruce E. Jaffe, Mark Buckley, Bruce M. Richmond, Luke Strotz, Samuel Etienne, Kate Clark, Steve Watt, Guy R. Gelfenbaum, James Goff
2011, Earth-Science Reviews (107) 23-37
Sandy deposits from the 29 September 2009 tsunami on the east coast of Upolu, Samoa were investigated to document their characteristics and used to apply an inverse sediment transport model to estimate tsunami flow speed. Sandy deposits 6 to 15 cm thick formed from ~ 25 to ~ 250 m inland. Sedimentary layers in...
Enhanced Late Holocene ENSO/PDO expression along the margins of the eastern North Pacific
John A. Barron, Lesleigh Anderson
2011, Quaternary International (235) 3-12
Pacific climate is known to have varied during the Holocene, but spatial patterns remain poorly defined. This paper compiles terrestrial and marine proxy data from sites along the northeastern Pacific margins and proposes that they indicate 1) suppressed ENSO conditions during the middle Holocene between ∼8000 and 4000 cal BP with...
Regression models of ecological streamflow characteristics in the Cumberland and Tennessee River Valleys
Rodney R. Knight, W. Scott Gain, William J. Wolfe
2011, Conference Paper, Proceedings from the 21st Tennessee American Water Resources Symposium
Predictive equations were developed using stepbackward regression for 19 ecologically relevant streamflow characteristics grouped in five major classes (magnitude, ratio, frequency, variability, and date) for use in the Tennessee and Cumberland River watersheds. Basin characteristics explain 50 percent or more of the variation for 10 of the 19 equations. Independent...
Summary of hydrologic testing of the Floridan aquifer system at Fort Stewart, coastal Georgia, 2009-2010
Gerald J. Gonthier
2011, Conference Paper, Proceedings of the 2011 Georgia Water Resources Conference
Two test wells were completed at Fort Stewart, coastal Georgia, to investigate the potential for using the Lower Floridan aquifer as a source of water to satisfy anticipated, increased water needs. The U.S. Geological Survey, in cooperation with the U.S. Department of the Army, completed hydrologic testing of the Floridan...
Quest for water in coastal Georgia: assessment of alternative water sources at Hunter Army Airfield, Chatham County, Georgia
John S. Clarke
2011, Conference Paper, Proceedings of the 2011 Georgia Water Resources Conference
To meet growing demands for water in the coastal Georgia area, the U.S. Geological Survey, in cooperation with the U.S. Department of the Army, conducted detailed site investigations and modeling studies at Hunter Army Airfield to assess the water-bearing potential of ponds and wells completed in the Lower Floridan aquifer....
User's manual for the National Water-Quality Assessment Program Invertebrate Data Analysis System (IDAS) software, version 5
Thomas F. Cuffney, Robin A. Brightbill
2011, Techniques and Methods 7-C4
The Invertebrate Data Analysis System (IDAS) software was developed to provide an accurate, consistent, and efficient mechanism for analyzing invertebrate data collected as part of the U.S. Geological Survey National Water-Quality Assessment (NAWQA) Program. The IDAS software is a stand-alone program for personal computers that run Microsoft Windows(Registered). It allows...
Regional groundwater-flow model of the Redwall-Muav, Coconino, and alluvial basin aquifer systems of northern and central Arizona
D. R. Pool, Kyle W. Blasch, James B. Callegary, Stanley A. Leake, Leslie F. Graser
2011, Scientific Investigations Report 2010-5180
A numerical flow model (MODFLOW) of the groundwater flow system in the primary aquifers in northern Arizona was developed to simulate interactions between the aquifers, perennial streams, and springs for predevelopment and transient conditions during 1910 through 2005. Simulated aquifers include the Redwall-Muav, Coconino, and basin-fill aquifers. Perennial stream reaches...
