A review of environmental impacts of salts from produced waters on aquatic resources
Aïda M. Farag, David D. Harper
2014, International Journal of Coal Geology (126) 157-161
Salts are frequently a major constituent of waste waters produced during oil and gas production. These produced waters or brines must be treated and/or disposed and provide a daily challenge for operators and resource managers. Some elements of salts are regulated with water quality criteria established for the protection of...
Three-dimensional distribution of igneous rocks near the Pebble porphyry Cu-Au-Mo deposit in southwestern Alaska: constraints from regional-scale aeromagnetic data
Eric D. Anderson, Wei Zhou, Yaoguo Li, Murray W. Hitzman, Thomas Monecke, James R. Lang, Karen D. Kelley
2014, Geophysics (79) B63-B79
Aeromagnetic data helped us to understand the 3D distribution of plutonic rocks near the Pebble porphyry copper deposit in southwestern Alaska, USA. Magnetic susceptibility measurements showed that rocks in the Pebble district are more magnetic than rocks of comparable compositions in the Pike Creek–Stuyahok Hills volcano-plutonic complex. The reduced-to-pole transformation...
The long-term trends (1982-2006) in vegetation greenness of the alpine ecosystem in the Qinghai-Tibetan Plateau
Li Zhang, Huadong Guo, Cuizhen Wang, Lei Ji, Jing Li, Kun Wang, Lin Dai
2014, Environmental Earth Sciences (72) 1827-1841
The increased rate of annual temperature in the Qinghai-Tibetan Plateau exceeded all other areas of the same latitude in recent decades. The influence of the warming climate on the alpine ecosystem of the plateau was distinct. An analysis of alpine vegetation under changes in climatic conditions was conducted in this...
Testing the accuracy of a 1-D volcanic plume model in estimating mass eruption rate
Larry G. Mastin
2014, Journal of Geophysical Research D: Atmospheres (119) 2474-2495
During volcanic eruptions, empirical relationships are used to estimate mass eruption rate from plume height. Although simple, such relationships can be inaccurate and can underestimate rates in windy conditions. One-dimensional plume models can incorporate atmospheric conditions and give potentially more accurate estimates. Here I present a 1-D model for plumes...
Comparing cropland net primary production estimates from inventory, a satellite-based model, and a process-based model in the Midwest of the United States
Zhengpeng Li, Shuguang Liu, Zhengxi Tan, Norman B. Bliss, Claudia J. Young, Tristram O. West, Stephen M. Ogle
2014, Ecological Modelling (277) 1-12
Accurately quantifying the spatial and temporal variability of net primary production (NPP) for croplands is essential to understand regional cropland carbon dynamics. We compared three NPP estimates for croplands in the Midwestern United States: inventory-based estimates using crop yield data from the U.S. Department of Agriculture (USDA) National Agricultural Statistics...
Large scale Wyoming transportation data: a resource planning tool
Michael S. O'Donnell, Tammy S. Fancher, Aaron T. Freeman, Abra E. Ziegler, Zachary H. Bowen, Cameron L. Aldridge
2014, Data Series 821
The U.S. Geological Survey Fort Collins Science Center created statewide roads data for the Bureau of Land Management Wyoming State Office using 2009 aerial photography from the National Agriculture Imagery Program. The updated roads data resolves known concerns of omission, commission, and inconsistent representation of map scale, attribution, and ground...
From headwaters to coast: Influence of human activities on water quality of the Potomac River Estuary
Suzanne B. Bricker, Karen C. Rice, Owen P. Bricker III
2014, Aquatic Geochemistry (20) 291-323
The natural aging process of Chesapeake Bay and its tributary estuaries has been accelerated by human activities around the shoreline and within the watershed, increasing sediment and nutrient loads delivered to the bay. Riverine nutrients cause algal growth in the bay leading to reductions in light penetration with consequent declines...
Groundwater studies: principal aquifer surveys
Karen R. Burow, Kenneth Belitz
2014, Fact Sheet 2014-3024
In 1991, the U.S. Congress established the National Water-Quality Assessment (NAWQA) program within the U.S. Geological Survey (USGS) to develop nationally consistent long-term datasets and provide information about the quality of the Nation’s streams and groundwater. The USGS uses objective and reliable data, water-quality models, and systematic scientific studies to...
Decision support system development at the Upper Midwest Environmental Sciences Center
Timothy J. Fox, J. C. Nelson, Jason J. Rohweder
2014, Fact Sheet 2014-3021
A Decision Support System (DSS) can be defined in many ways. The working definition used by the U.S. Geological Survey Upper Midwest Environmental Sciences Center (UMESC) is, “A spatially based computer application or data that assists a researcher or manager in making decisions.” This is quite a broad definition—and it...
Water use characteristics of black mangrove (Avicennia germinans) communities along an ecotone with marsh at a northern geographical limit
Ken W. Krauss, Karen L. McKee, Mark W. Hester
2014, Ecohydrology (7) 354-365
Mangroves are expanding into warm temperate-zone salt marsh communities in several locations globally. Although scientists have discovered that expansion might have modest effects on ecosystem functioning, water use characteristics have not been assessed relative to this transition. We measured early growing season sapflow (Js) and leaf transpiration (Tr) in Avicennia...
Laharz_py: GIS tools for automated mapping of lahar inundation hazard zones
Steve P. Schilling
2014, Open-File Report 2014-1073
Laharz_py is written in the Python programming language as a suite of tools for use in ArcMap Geographic Information System (GIS). Primarily, Laharz_py is a computational model that uses statistical descriptions of areas inundated by past mass-flow events to forecast areas likely to be inundated by hypothetical future events. The...
Adverse moisture events predict seasonal abundance of Lyme disease vector ticks (Ixodes scapularis)
Kathryn A. Berger, Howard S. Ginsberg, Katherine D. Dugas, Lutz H. Hamel, Thomas N. Mather
2014, Parasites & Vectors (7)
Background: Lyme borreliosis (LB) is the most commonly reported vector-borne disease in north temperate regions worldwide, affecting an estimated 300,000 people annually in the United States alone. The incidence of LB is correlated with human exposure to its vector, the blacklegged tick (Ixodes scapularis). To date, attempts to model tick...
Statistics for stochastic modeling of volume reduction, hydrograph extension, and water-quality treatment by structural stormwater runoff best management practices (BMPs)
Gregory E. Granato
2014, Scientific Investigations Report 2014-5037
The U.S. Geological Survey (USGS) developed the Stochastic Empirical Loading and Dilution Model (SELDM) in cooperation with the Federal Highway Administration (FHWA) to indicate the risk for stormwater concentrations, flows, and loads to be above user-selected water-quality goals and the potential effectiveness of mitigation measures to reduce such risks. SELDM...
Projecting climate effects on birds and reptiles of the Southwestern United States
Charles van Riper III, James R. Hatten, J. Tomasz Giermakowski, David Mattson, Jennifer A. Holmes, Matthew J. Johnson, Erika M. Nowak, Kirsten Ironside, Michael Peters, Paul Heinrich, K.L. Cole, C. Truettner, Cecil R. Schwalbe
2014, Open-File Report 2014-1050
We modeled the current and future breeding ranges of seven bird and five reptile species in the Southwestern United States with sets of landscape, biotic (plant), and climatic global circulation model (GCM) variables. For modeling purposes, we used PRISM data to characterize the climate of the Western United States between 1980...
Identifying marine Important Bird Areas using at-sea survey data
Melanie A. Smith, Nathan J. Walker, Christopher M. Free, Matthew J. Kirchhoff, Gary S. Drew, Nils Warnock, Iain J. Stenhouse
2014, Biological Conservation (172) 180-189
Effective marine bird conservation requires identification of at-sea locations used by populations for foraging, staging, and migration. Using an extensive database of at-sea survey data spanning over 30 years, we developed a standardized and data-driven spatial method for identifying globally significant marine Important Bird Areas in Alaska. To delineate these...
Post-release behavior and movement patterns of Chinook salmon (Oncorhynchus tshawytscha) and coho salmon (Oncorhynchus kisutch) after capture using alternative commercial fish gear, lower Columbia River, Washington and Oregon, 2013
Theresa L. Liedtke, Tobias J. Kock, Scott D. Evans, Gabriel S. Hansen, Dennis W. Rondorf
2014, Open-File Report 2014-1069
Commercial salmon Oncorhynchus spp. fishers traditionally have used gill nets, and more recently tangle nets, to capture adult salmon in the lower Columbia River, Washington and Oregon, but these gear types are not selective and can result in unintentional injury or death to non-target species, which is a problem when...
Groundwater availability in the Crouch Branch and McQueen Branch aquifers, Chesterfield County, South Carolina, 1900-2012
Bruce G. Campbell, James Landmeyer
2014, Scientific Investigations Report 2014-5050
Chesterfield County is located in the northeastern part of South Carolina along the southern border of North Carolina and is primarily underlain by unconsolidated sediments of Late Cretaceous age and younger of the Atlantic Coastal Plain. Approximately 20 percent of Chesterfield County is in the Piedmont Physiographic Province, and this...
Noble gas isotopes in mineral springs within the Cascadia Forearc, Washington and Oregon
Patricia A. McCrory, James E. Constantz, Andrew G. Hunt
2014, Open-File Report 2014-1064
This U.S. Geological Survey report presents laboratory analyses along with field notes for a pilot study to document the relative abundance of noble gases in mineral springs within the Cascadia forearc of Washington and Oregon. Estimates of the depth to the underlying Juan de Fuca oceanic plate beneath the sample...
Groundwater-quality data in seven GAMA study units: results from initial sampling, 2004-2005, and resampling, 2007-2008, of wells: California GAMA Program Priority Basin Project
Robert H. Kent, Kenneth Belitz, Miranda S. Fram
2014, Data Series 795
The Priority Basin Project (PBP) of the Groundwater Ambient Monitoring and Assessment (GAMA) Program was developed in response to the Groundwater Quality Monitoring Act of 2001 and is being conducted by the U.S. Geological Survey (USGS) in cooperation with the California State Water Resources Control Board (SWRCB). The GAMA-PBP began...
Testing metapopulation concepts: effects of patch characteristics and neighborhood occupancy on the dynamics of an endangered lagomorph
Mitchell J. Eaton, Phillip T. Hughes, James E. Hines, James D. Nichols
2014, Oikos (123) 662-676
Metapopulation ecology is a field that is richer in theory than in empirical results. Many existing empirical studies use an incidence function approach based on spatial patterns and key assumptions about extinction and colonization rates. Here we recast these assumptions as hypotheses to be tested using 18 years of historic...
Clinal variation or validation of a subspecies? A case study of the Graptemys nigrinoda complex (Testudines: Emydidae)
Joshua R. Ennen, Marley E. Kalis, Adam L. Patterson, Brian R. Kreiser, Jeffrey E. Lovich, James Godwin, Carl P. Qualls
2014, Biological Journal of the Linnean Society (111) 810-822
Widely distributed species often display intraspecific morphological variation due to the abiotic and biotic gradients experienced across their ranges. Historically, in many vertebrate taxa, such as birds and reptiles, these morphological differences within a species were used to delimit subspecies. Graptemys nigrinoda is an aquatic turtle species endemic to the...
Airborne geophysical surveys conducted in western Nebraska, 2010: contractor reports and data
U.S.Geological Survey Crustal Geophysical and Geochemical Science Center
2014, Open-File Report 2013-1268
This report contains three contractor reports and data files for an airborne electromagnetic survey flown from June 28 to July 7, 2010. The first report; “SkyTEM Survey: Nebraska, USA, Data” describes data aquisition and processing from a time-domain electromagnetic and magnetic survey performed by SkyTEM Canada, Inc. (the North American...
Geochronology and correlation of Tertiary volcanic and intrusive rocks in part of the southern Toquima Range, Nye County, Nevada
Daniel R. Shawe, Lawrence W. Snee, Frank M. Byers Jr., Edward A. du Bray
2014, Scientific Investigations Report 2013-5206
Extensive volcanic and intrusive igneous activity, partly localized along regional structural zones, characterized the southern Toquima Range, Nevada, in the late Eocene, Oligocene, and Miocene. The general chronology of igneous activity has been defined previously. This major episode of Tertiary magmatism began with emplacement of a variety of intrusive rocks,...
Soils, vegetation, and woody debris data from the 2001 Survey Line fire and a comparable unburned site, Tanana Flats region, Alaska
Kristen L. Manies, Jennifer W. Harden, Teresa N. Holingsworth
2014, Open-File Report 2014-1049
This report describes the collection and processing methodologies for samples obtained at two sites within Interior Alaska: (1) a location within the 2001 Survey Line burn, and (2) an unburned location, selected as a control. In 2002 and 2004 U.S. Geological Survey investigators measured soil properties including, but not limited...
Decadal surface water quality trends under variable climate, land use, and hydrogeochemical setting in Iowa, USA
Christopher T. Green, Barbara A. Bekins, Stephen J. Kalkhoff, Robert M. Hirsch, Lixia Liao, Kimberlee K. Barnes
2014, Water Resources Research (50) 2425-2443
Understanding how nitrogen fluxes respond to changes in agriculture and climate is important for improving water quality. In the midwestern United States, expansion of corn cropping for ethanol production led to increasing N application rates in the 2000s during a period of extreme variability of annual precipitation. To examine the...
