Radon-222 content of natural gas samples from Upper and Middle Devonian sandstone and shale reservoirs in Pennsylvania—preliminary data
E. L. Rowan, T. F. Kraemer
2012, Open-File Report 2012-1159
Samples of natural gas were collected as part of a study of formation water chemistry in oil and gas reservoirs in the Appalachian Basin. Nineteen samples (plus two duplicates) were collected from 11 wells producing gas from Upper Devonian sandstones and the Middle Devonian Marcellus Shale in Pennsylvania. The samples...
Topographic change detection at select archeological sites in Grand Canyon National Park, Arizona, 2007-2010
Brian D. Collins, Skye C. Corbett, Helen C. Fairley, Diane L. Minasian, Robert Kayen, Timothy P. Dealy, David R. Bedford
2012, Scientific Investigations Report 2012-5133
Human occupation in Grand Canyon, Arizona, dates from at least 11,000 years before present to the modern era. For most of this period, the only evidence of human occupation in this iconic landscape is provided by archeological sites. Because of the dynamic nature of this environment, many archeological sites are...
Sediment mobility and bed armoring in the St Clair River: insights from hydrodynamic modeling
Xiaofeng Liu, Gary Parker, Jonathan A. Czuba, Kevin Oberg, Jose M. Mier, James L. Best, Daniel R. Parsons, Peter Ashmore, Bommanna G. Krishnappan, Marcelo H. Garcia
2012, Earth Surface Processes and Landforms (37) 957-970
The lake levels in Lake Michigan-Huron have recently fallen to near historical lows, as has the elevation difference between Lake Michigan-Huron compared to Lake Erie. This decline in lake levels has the potential to cause detrimental impacts on the lake ecosystems, together with social and economic impacts on communities in...
Assessment of soil-gas and groundwater contamination at the Gibson Road landfill, Fort Gordon, Georgia, 2011
W. Fred Falls, Andral W. Caldwell, Wladmir G. Guimaraes, W. Hagan Ratliff, John B. Wellborn, James Landmeyer
2012, Open-File Report 2012-1128
Soil-gas and groundwater assessments were conducted at the Gibson Road landfill in 201 to provide screening-level environmental contamination data to supplement the data collected during previous environmental studies at the landfill. Passive samplers were used in both assessments to detect volatile and semivolatile organic compounds and polycyclic aromatic hydrocarbons in...
Model of whooping crane energetics as foundation for development of a method to assess potential take during migration
Aaron T. Pearse, Sarena M. Selbo
2012, Open-File Report 2012-1156
A whooping crane energetic model was developed as a component of a larger effort to ascertain potential take, as defined by the Endangered Species Act, of whooping cranes from proposed development of wind-energy infrastructure in the Great Plains of North America. The primary objectives of this energetic model were to...
Assessment of soil-gas contamination at the 17th Street landfill, Fort Gordon, Georgia, 2011
W. Fred Falls, Andral W. Caldwell, Wladmir G. Guimaraes, W. Hagan Ratliff, John B. Wellborn, James Landmeyer
2012, Open-File Report 2012-1127
Assessments of contaminants in soil gas were conducted in two study areas at Fort Gordon, Georgia, in July and August of 2011 to supplement environmental contaminant data for previous studies at the 17th Street landfill. The two study areas include northern and eastern parts of the 17th Street landfill and...
Sea-level history of past interglacial periods: New evidence from uranium-series dating of corals from Curaçao, Leeward Antilles islands
Daniel R. Muhs, John M. Pandolfi, Kathleen R. Simmons, R. Randall Schumann
2012, Quaternary Research (78) 157-169
Curaçao has reef terraces with the potential to provide sea-level histories of interglacial periods. Ages of the Hato (upper) unit of the “Lower Terrace” indicate that this reef dates to the last interglacial period, Marine Isotope Stage (MIS) 5.5. On Curaçao, this high sea stand lasted at least 8000 yr...
Assessment of shallow landslide potential using 1-D and 3-D slope stability analysis
Rex L. Baum, Jonathan W. Godt, Jeffrey A. Coe, Mark E. Reid
Erik Eberhardt, Corey Froese, Keith Turner, S. Leroueil, editor(s)
2012, Book chapter, Landslides and Engineered Slopes, Protecting Society Through Improved Understanding: Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, Banff, Canada, 3-8 June
Hydrogeology and simulation of groundwater flow and land-surface subsidence in the northern part of the Gulf Coast aquifer system, Texas, 1891-2009
Mark C. Kasmarek
2012, Scientific Investigations Report 2012-5154
In cooperation with the Harris–Galveston Subsidence District, Fort Bend Subsidence District, and Lone Star Groundwater Conservation District, the U.S. Geological Survey developed and calibrated the Houston Area Groundwater Model (HAGM), which simulates groundwater flow and land-surface subsidence in the northern part of the Gulf Coast aquifer system in Texas from...
Kinematics of the Slumgullion landslide revealed by ground-based InSAR surveys
W.H. Schulz, J. A. Coe, B.L. Shurtleff, J. Panosky, P. Farina, P.P. Ricci, G. Barsacchi
Erik Eberhardt, Corey Froese, Keith Turner, S. Leroueil, editor(s)
2012, Book chapter, Landslides and Engineered Slopes, Protecting Society Through Improved Understanding: Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, Banff, Canada, 3-8 June
Flood-inundation maps for the Driftwood River and Sugar Creek near Edinburgh, Indiana
Kathleen K. Fowler, Moon H. Kim, Chad D. Menke
2012, Scientific Investigations Map 3210
Digital flood-inundation maps for an 11.2 mile reach of the Driftwood River and a 5.2 mile reach of Sugar Creek, both near Edinburgh, Indiana, were created by the U.S. Geological Survey (USGS) in cooperation with the Camp Atterbury Joint Maneuver Training Center, Edinburgh, Indiana. The inundation maps, which can be...
Severe mammal declines coincide with proliferation of invasive Burmese pythons in Everglades National Park
Michael E. Dorcas, John D. Wilson, Robert N. Reed, Ray W. Snow, Michael R. Rochford, Melissa A. Miller, Walter E. Meshaka Jr., Paul T. Andreadis, Frank J. Mazzotti, Christina M. Romagosa, Kristen M. Hart
2012, Proceedings of the National Academy of Sciences of the United States of America (109) 2418-2422
Invasive species represent a significant threat to global biodiversity and a substantial economic burden. Burmese pythons, giant constricting snakes native to Asia, now are found throughout much of southern Florida, including all of Everglades National Park (ENP). Pythons have increased dramatically in both abundance and geographic range since 2000 and...
New AGU scientific integrity and professional ethics policy available for review
Linda C. Gundersen
2012, Eos, Transactions, American Geophysical Union (93) 377-377
The AGU Task Force on Scientific Ethics welcomes your review and comments on AGU's new Scientific Integrity and Professional Ethics Policy. The policy has at its heart a code of conduct adopted from the internationally accepted "Singapore Statement," originally created by the Second World Conference on Research Integrity (http://www.singaporestatement.org/), held...
Probability and volume of potential postwildfire debris flows in the 2012 Waldo Canyon Burn Area near Colorado Springs, Colorado
Kristine L. Verdin, Jean A. Dupree, John G. Elliott
2012, Open-File Report 2012-1158
This report presents a preliminary emergency assessment of the debris-flow hazards from drainage basins burned by the 2012 Waldo Canyon fire near Colorado Springs in El Paso County, Colorado. Empirical models derived from statistical evaluation of data collected from recently burned basins throughout the intermountain western United States were used...
Evaluation of effects of changes in canal management and precipitation patterns on salinity in Biscayne Bay, Florida, using an integrated surface-water/groundwater model
Melinda A. Lohmann, Eric D. Swain, John D. Wang, Joann Dixon
2012, Scientific Investigations Report 2012-5099
Biscayne National Park, located in Biscayne Bay in southeast Florida, is one of the largest marine parks in the country and sustains a large natural marine fishery where numerous threatened and endangered species reproduce. In recent years, the bay has experienced hypersaline conditions (salinity greater than 35 practical salinity units)...
Prototype landslide hazard map of the conterminous United States
J. W. Godt, J. A. Coe, R.L. Baum, L.M. Highland, J.R. Keaton, R.J. Roth Jr.
Erik Eberhardt, Corey Froese, Keith Turner, S. Leroueil, editor(s)
2012, Book chapter, Landslides and Engineered Slopes, Protecting Society Through Improved Understanding: Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, Banff, Canada, 3-8 June
Population dynamics of king eiders breeding in northern Alaska
Rebecca L. Bentzen, Abby N. Powell
2012, Journal of Wildlife Management (76) 1011-1020
The North American population of king eiders (Somateria spectabilis) has declined by more than 50% since the late 1970s for unknown reasons. King eiders spend most of their lives in remote areas, forcing managers to make regulatory and conservation decisions based on very little information. We incorporated available published estimates...
National climate assessment technical report on the impacts of climate and land use and land cover change
Thomas Loveland, Rezaul Mahmood, Toral Patel-Weynand, Krista Karstensen, Kari Beckendorf, Norman Bliss, Andrew Carleton
2012, Open-File Report 2012-1155
This technical report responds to the recognition by the U.S. Global Change Research Program (USGCRP) and the National Climate Assessment (NCA) of the importance of understanding how land use and land cover (LULC) affects weather and climate variability and change and how that variability and change affects LULC. Current published,...
Review of approaches for assessing the impact of climate change on landslide hazards
Jeffrey A. Coe, J. W. Godt
Erik Eberhardt, Corey Froese, Keith Turner, S. Leroueil, editor(s)
2012, Book chapter, Landslides and Engineered Slopes, Protecting Society Through Improved Understanding: Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, Banff, Canada, 3-8 June
Natural-channel-design restorations that changed geomorphology have little effect on macroinvertebrate communities in headwater streams
Anne G. Ernst, Dana R. Warren, Barry P. Baldigo
2012, Restoration Ecology (20) 532-540
Stream restorations that increase geomorphic stability can improve habitat quality, which should benefit selected species and local aquatic ecosystems. This assumption is often used to define primary restoration goals; yet, biological responses to restoration are rarely monitored or evaluated methodically. Macroinvertebrate communities were inventoried at 6 study reaches within 5...
Water quality and landscape processes of four watersheds in eastern Puerto Rico
Sheila F. Murphy, Robert F. Stallard, Heather L. Contributions by Buss, William A. Gould, Matthew C. Larsen, Zhigang Liu, Sebastian Martinuzzi, Isabel K. Pares-Ramos, Arthur F. White, Xiaoming Zou
2012, Professional Paper 1789
Humid tropical regions occupy about a quarter of Earth's land surface, yet they contribute a substantially higher fraction of the water, solutes, and sediment discharged to the world's oceans. Nearly half of Earth's population lives in the tropics, and development stresses can potentially harm soil resources, water quality, and water...
Nest survival of piping plovers at a dynamic reservoir indicates an ecological trap for a threatened population
Michael J. Anteau, Terry L. Shaffer, Mark H. Sherfy, Marsha A. Sovada, Jennifer H. Stucker, Mark T. Wiltermuth
2012, Oecologia (170) 1167-1179
In the past 60 years, reservoirs have reshaped riverine ecosystems and transformed breeding habitats used by the threatened piping plover (Charadrius melodus; hereafter plover). Currently, 29% of the Northern Great Plains plover population nests at reservoirs that might function as ecological traps because reservoirs have more diverse habitat features and...
Patterns in species richness and assemblage structure of native mussels in the Upper Mississippi River
Steven J. Zigler, Teresa J. Newton, Mike Davis, James T. Rogala
2012, Aquatic Conservation: Marine and Freshwater Ecosystems (22) 577-587
1. To evaluate patterns in mussel assemblages in the Upper Mississippi River (UMR), data from systematic surveys of mussels conducted in three large reaches (Navigation Pools 5, 6, and 18) from 2005–2007 were analysed. 2. Nonmetric multi-dimensional scaling analyses and permutation tests indicated that assemblages differed among reaches. The mussel...
Molecular responses differ between sensitive silver carp and tolerant bighead carp and bigmouth buffalo exposed to rotenone
Jon J. Amberg, Theresa M. Schreier, Mark P. Gaikowski
2012, Fish Physiology and Biochemistry (38) 1379-1391
Some species of fish are more tolerant of rotenone, a commonly used non-specific piscicide, than others. This species-specific tolerance to rotenone has been thought to be associated with the uptake and the efficiency at which the chemical is detoxified. However, rotenone stimulates oxidative stress and superoxides, which are also toxic....
Monitoring gradual ecosystem change using Landsat time series analyses: case studies in selected forest and rangeland ecosystems
James E. Vogelmann, George Xian, Collin G. Homer, Brian Tolk
2012, Remote Sensing of Environment (122) 92-105
The focus of the study was to assess gradual changes occurring throughout a range of natural ecosystems using decadal Landsat Thematic Mapper (TM) and Enhanced Thematic Mapper Plus (ETM +) time series data. Time series data stacks were generated for four study areas: (1) a four scene area dominated by...
