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Page 798, results 19926 - 19950

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Not all publications have extents, not all extents are completely accurate
Attributes for NHDPlus catchments (version 1.1) for the conterminous United States: 30-year average annual maximum temperature, 1971-2000
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 490-29
This data set represents the 30-year (1971-2000) average annual maximum temperature in Celsius multiplied by 100 compiled for every catchment of NHDPlus for the conterminous United States. The source data were the United States Average Monthly or Annual Minimum Temperature, 1971 - 2000 raster dataset produced by the PRISM Group...
Use of electrical imaging and distributed temperature sensing methods to characterize surface water–groundwater exchange regulating uranium transport at the Hanford 300 Area, Washington
Lee D. Slater, Dimitrios Ntarlagiannis, Frederick D. Day-Lewis, Kisa Mwakanyamale, Roelof J. Versteeg, Andy Ward, Christopher Strickland, Carole D. Johnson, John W. Lane Jr.
2010, Water Resources Research (46)
We explored the use of continuous waterborne electrical imaging (CWEI), in conjunction with fiber‐optic distributed temperature sensor (FO‐DTS) monitoring, to improve the conceptual model for uranium transport within the Columbia River corridor at the Hanford 300 Area, Washington. We first inverted resistivity and induced polarization CWEI data sets for distributions...
Attributes for NHDPlus catchments (version 1.1) for the conterminous United States: Average Annual Daily Maximum Temperature, 2002
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 490-28
This data set represents the average monthly maximum temperature in Celsius multiplied by 100 for 2002 compiled for every catchment of NHDPlus for the conterminous United States. The source data were the Near-Real-Time High-Resolution Monthly Average Maximum/Minimum Temperature for the Conterminous United States for 2002 raster dataset produced by the...
National Water-Quality Assessment (NAWQA) Area-Characterization Toolbox
Curtis Price
2010, Report
This is release 1.0 of the National Water-Quality Assessment (NAWQA) Area-Characterization Toolbox. These tools are designed to be accessed using ArcGIS Desktop software (versions 9.3 and 9.3.1). The toolbox is composed of a collection of custom tools that implement geographic information system (GIS) techniques used by the NAWQA Program to...
Diet shift of lentic dragonfly larvae in response to reduced terrestrial prey subsidies
Johanna M. Kraus
2010, Journal of the North American Benthological Society (29) 602-613
Inputs of terrestrial plant detritus and nutrients play an important role in aquatic food webs, but the importance of terrestrial prey inputs in determining aquatic predator distribution and abundance has been appreciated only recently. I examined the numerical, biomass, and diet responses of a common predator, dragonfly larvae, to experimental...
Attributes for NHDPlus catchments (Version 1.1) for the conterminous United States: STATSGO soil characteristics
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 490-26
This data set represents estimated soil variables compiled for every catchment of NHDPlus for the conterminous United States. The variables included are cation exchange capacity, percent calcium carbonate, slope, water-table depth, soil thickness, hydrologic soil group, soil erodibility (k-factor), permeability, average water capacity, bulk density, percent organic material, percent clay,...
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Mean Annual R-factor, 1971-2000
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 490-23
This data set represents the average annual R-factor, rainfall-runoff erosivity measure, compiled for every catchment of NHDPlus for the conterminous United States. The source data are from Christopher Daly of the Spatial Climate Analysis Service, Oregon State University, and George Taylor of the Oregon Climate Service, Oregon State University (2002),...
Relating large-scale climate variability to local species abundance: ENSO forcing and shrimp in Breton Sound, Louisiana, USA
Bryan P. Piazza, Megan K. LaPeyre, B.D. Keim
2010, Climate Research (42) 195-207
Climate creates environmental constraints (filters) that affect the abundance and distribution of species. In estuaries, these constraints often result from variability in water flow properties and environmental conditions (i.e. water flow, salinity, water temperature) and can have significant effects on the abundance and distribution of commercially important nekton species. We...
Bioenergetics assessment of fish and crayfish consumption by river otter (Lontra canadensis): integrating prey availability, diet, and field metabolic rate
Matthew P. Dekar, Daniel D. Magoulick, J. Beringer
2010, Canadian Journal of Fisheries and Aquatic Sciences (67) 1439-1448
River otters (Lontra canadensis) are important predators in aquatic ecosystems, but few studies quantify their prey consumption. We trapped crayfish monthly as an index of availability and collected otter scat for diet analysis in the Ozark Mountains of northwestern Arkansas, USA. We measured otter daily energy expenditure (DEE) with the...
Occupancy and habitat use of the Least Bittern and Pied-Billed Grebe in the Illinois and Upper Mississippi River Valleys
Abigail J. Darrah, David G. Krementz
2010, Waterbirds (33) 367-375
The Least Bittern (Ixobrychus exilis) and the Pied-billed Grebe (Podilymbus podiceps) are secretive marsh bird species that breed in the Illinois and Upper Mississippi River Valleys. Marsh bird surveys were conducted on public and private wetlands in this region during the breeding seasons of 2006 and 2007. Detection probability (ῥ)...
Effect of numerical dispersion as a source of structural noise in the calibration of a highly parameterized saltwater intrusion model
Christian D. Langevin, Joseph D. Hughes
2010, Book, Proceedings 2009 PEST Conference
A model with a small amount of numerical dispersion was used to represent saltwater 7 intrusion in a homogeneous aquifer for a 10-year historical calibration period with one 8 groundwater withdrawal location followed by a 10-year prediction period with two groundwater 9 withdrawal locations. Time-varying groundwater concentrations at arbitrary locations...
Applications of stable isotopes for regional to national-scale water quality and environmental monitoring programs
Carol Kendall, Megan B. Young, Steven R. Silva
J. West, T. Dawson, K. Tu, editor(s)
2010, Book chapter, Isoscapes
Isotopes are a potentially powerful component of monitoring and assessment programs aimed at quantifying and mitigating alterations to environments from human activities. In particular, isotopic techniques have proved useful for tracing sources and sinks of various pollutants in large river basins, wetlands, and airsheds. Many of these studies have been...
Methylmercury cycling, bioaccumulation, and export from agricultural and non-agricultural wetlands in the Yolo Bypass
Lisamarie Windham-Myers, Mark Marvin-DiPasquale, Jacob Fleck, Charles N. Alpers, Joshua T. Ackerman, Collin A. Eagles-Smith, Craig Stricker, Mark Stephenson, David Feliz, Gary Gill, Philip Bachand, Ann Brice, Robin Kulakow
2010, Report
This 18-month field study addresses the seasonal and spatial patterns and processes controlling methylmercury (MeHg) production, bioaccumulation, and export from natural and agricultural wetlands of the Yolo Bypass Wildlife Area (YBWA). The data were collected in conjuntion with a Proposition 40 grant from the State Water Resources Control Board in...
Measurement-derived heat-budget approaches for simulating coastal wetland temperature with a hydrodynamic model
Eric Swain, Jeremy Decker
2010, Wetlands (30) 635-648
Numerical modeling is needed to predict environmental temperatures, which affect a number of biota in southern Florida, U.S.A., such as the West Indian manatee (Trichechus manatus), which uses thermal basins for refuge from lethal winter cold fronts. To numerically simulate heat-transport through a dynamic coastal wetland region, an algorithm was...
Potential effects of coal bed natural gas development on fish and aquatic resources
Aida M. Farag, D.D. Harper, W.A. Hubert, A.E. Hubert
2010, Book chapter, Coalbed natural gas: Energy and environment
The purpose of this chapter is to provide a summary of issues and findings related to the potential effects of coalbed natural gas (CBNG) development on fish and other aquatic resources. We reviewed CBNG issues from across the United States and used the Powder River Basin of Wyoming as a case study to...
A digital underwater video camera system for aquatic research in regulated rivers
Benjamin M. Martin, Elise R. Irwin
2010, North American Journal of Fisheries Management (30) 1365-1369
We designed a digital underwater video camera system to monitor nesting centrarchid behavior in the Tallapoosa River, Alabama, 20 km below a peaking hydropower dam with a highly variable flow regime. Major components of the system included a digital video recorder, multiple underwater cameras, and specially fabricated substrate stakes. The...
Road crossing designs and their impact on fish assemblages of Great Plains streams
Wesley W. Bouska, Craig P. Paukert
2010, Transactions of the American Fisheries Society (139) 214-222
A mark-recapture field study was conducted to determine fish passage at 5 concrete box culverts and 5 low-water crossings (concrete slabs vented by culverts) as well as 10 control sites (below a natural riffle) in Flint Hills streams of northeastern Kansas. Additionally, we tested the upstream passage of four fish...
Introduction to the JEEG Agricultural Geophysics Special Issue
Barry J. Allred, Bruce D. Smith
2010, Journal of Environmental & Engineering Geophysics (15) v-vi
Near-surface geophysical methods have become increasingly important tools in applied agricultural practices and studies. The great advantage of geophysical methods is their potential rapidity, low cost, and spatial continuity when compared to more traditional methods of assessing agricultural land, such as sample collection and laboratory analysis. Agricultural geophysics investigations commonly...
Fish guidance and passage at barriers
Theodore R. Castro-Santos, Alexander Haro
Paolo Domenici, B. G. Kapoor, editor(s)
2010, Book chapter, Fish locomotion: An eco-ethological perspective
Habitat fragmentation resulting from human activities is a major factor contributing to reductions in biodiversity and species abundance worldwide. When movements are restricted, subpopulations become isolated, leading to reduced breeding opportunities, inbreeding depression, and interruption of key life stages. This problem is particularly ubiquitous in riverine ecosystems, where dams, water...
Effects of model layer simplification using composite hydraulic properties
Nicasio Sepulveda, Eve L. Kuniansky
2010, Hydrogeology Journal (18) 405-416
The effects of simplifying hydraulic property layering within an unconfined aquifer and the underlying confining unit were assessed. The hydraulic properties of lithologic units within the unconfined aquifer and confining unit were computed by analyzing the aquifer-test data using radial, axisymmetric two-dimensional (2D) flow. Time-varying recharge to the unconfined aquifer...
The biostratigraphic importance of conchostracans in the continental Triassic of the northern hemisphere
H. W. Kozur, Robert E. Weems
2010, Book chapter, The Triassic timescale
Conchostracans or clam shrimp (order Conchostraca Sars) are arthropods with a carapace consisting of two chitinous lateral valves. Triassic conchostracans range in size from 2 to 12.5 mm long and are common in deposits that formed in fresh water lakes, isolated ponds and brackish areas. Their dessication- and freeze-resistant eggs...
A Natural Resource Condition Assessment for Rocky Mountain National Park
D.M. Theobald, Jill Baron, P. Newman, B. Noon, J. B. Norman III, I. Leinwand, S.E. Linn, R. Sherer, K.E. Williams, M. Hartman
2010, Report
We conducted a natural resource assessment of Rocky Mountain National Park (ROMO) to provide a synthesis of existing scientific data and knowledge to address the current conditions for a subset of important park natural resources. The intent is for this report to help provide park resource managers with data and...
Biodegration of chlorinated ethenes
Paul M. Bradley, Francis H. Chapelle
2010, Book chapter, In situ remediation of chlorinated solvent plumes
Biodegradation of chlorinated ethenes by naturally occurring or artificially enhanced processes is an important component of current site remediation strategies. At this writing, several microbial mechanisms for chlorinated ethene transformation and degradation have been identified. The purpose of this chapter is to briefly summarize the current understanding of those processes...