Airborne electromagnetic mapping of the base of aquifer in areas of western Nebraska
Jared D. Abraham, James C. Cannia, Paul A. Bedrosian, Michaela R. Johnson, Lyndsay B. Ball, Steven S. Sibray
2012, Scientific Investigations Report 2011-5219
Airborne geophysical surveys of selected areas of the North and South Platte River valleys of Nebraska, including Lodgepole Creek valley, collected data to map aquifers and bedrock topography and thus improve the understanding of groundwater - surface-water relationships to be used in water-management decisions. Frequency-domain helicopter electromagnetic surveys, using a...
Surficial geologic map of the Cuddeback Lake 30' x 60' quadrangle, San Bernardino and Kern Counties, California
Lee Amoroso, David M. Miller
2012, Scientific Investigations Map 3107
The 1:100,000-scale Cuddeback Lake quadrangle is located in the western Mojave Desert north-northeast of Los Angeles, between the southern Sierra Nevada and San Bernardino Mountains, in Kern and San Bernardino Counties, California. Geomorphic features include high-relief mountains, small hills, volcanic domes, pediments, broad alluvial valleys, and dry lakes. It is...
Apalachicola Bay interpreted seismic horizons and updated IRIS chirp seismic-reflection data
V.A. Cross, D.C. Twichell, D.S. Foster, T.F. O’Brien
2012, Open-File Report 2012-1003
Apalachicola Bay and St. George Sound contain the largest oyster fishery in Florida, and the growth and distribution of the numerous oyster reefs here are the combined product of modern estuarine conditions and the late Holocene evolution of the bay. A suite of geophysical data and cores were collected during...
Biodiversity of man-made open habitats in an underused country: a class of multispecies abundance models for count data
Yuichi Yamaura, J. Andrew Royle, Naoaki Shimada, Seigo Asanuma, Tamotsu Sato, Hisatomo Taki, Shun’ichi Makino
2012, Biodiversity and Conservation (21) 1365-1380
Since the 1960s, Japan has become highly dependent on foreign countries for natural resources, and the amount of managed lands (e.g. coppice, grassland, and agricultural field) has declined. Due to infrequent natural and human disturbance, early-successional species are now declining in Japan. Here we surveyed bees, birds, and plants in...
Land area change analysis following hurricane impacts in Delacroix, Louisiana, 2004--2009
Monica Palaseanu-Lovejoy, Christine J. Kranenburg, John Brock
2012, Scientific Investigations Map 3207
The purpose of this project is to provide improved estimates of Louisiana wetland land loss due to hurricane impacts between 2004 and 2009 based upon a change detection mapping analysis that incorporates pre- and post-landfall (Hurricanes Katrina, Rita, Gustav, and Ike) fractional water classification of a combination of high resolution...
Hydrogeologic characteristics and water quality of a confined sand unit in the surficial aquifer system, Hunter Army Airfield, Chatham County, Georgia
Gerard Gonthier
2012, Scientific Investigations Report 2012-5082
An 80-foot-deep well (36Q397, U.S. Geological Survey site identification 320146081073701) was constructed at Hunter Army Airfield to assess the potential of using the surficial aquifer system as a water source to irrigate a ballfield complex. A 300-foot-deep test hole was drilled beneath the ballfield complex to characterize the lithology and...
Minor element distribution in iron disulfides in coal: a geochemical review
Allan Kolker
2012, International Journal of Coal Geology (94) 32-43
Electron beam microanalysis of coal samples in U.S. Geological Survey (USGS) labs confirms that As is the most abundant minor constituent in Fe disulfides in coal and that Se, Ni, and other minor constituents are present less commonly and at lower concentrations than those for As. In nearly all cases,...
Including foreshocks and aftershocks in time-independent probabilistic seismic hazard analyses
Oliver S. Boyd
2012, Bulletin of the Seismological Society of America (102) 909-917
Time‐independent probabilistic seismic‐hazard analysis treats each source as being temporally and spatially independent; hence foreshocks and aftershocks, which are both spatially and temporally dependent on the mainshock, are removed from earthquake catalogs. Yet, intuitively, these earthquakes should be considered part of the seismic hazard, capable of producing damaging ground motions....
Water resources of Vernon Parish
Lawrence B. Prakken, Jason M. Griffith, Robert B. Fendick Jr.
2012, Fact Sheet 2012-3063
In 2005, about 6.67 million gallons per day (Mgal/d) of water were withdrawn in Vernon Parish, Louisiana, including about 6.46 Mgal/d from groundwater sources and 0.21 Mgal/d from surface-water sources. Public-supply use accounted for about 76 percent (5.06 Mgal/d) of the total water withdrawn. Other categories of use included rural...
Relations between precipitation, groundwater withdrawals, and changes in hydrologic conditions at selected monitoring sites in Volusia County, Florida, 1995--2010
Louis C. Murray Jr.
2012, Scientific Investigations Report 2012-5075
A study to examine the influences of climatic and anthropogenic stressors on groundwater levels, lake stages, and surface-water discharge at selected sites in northern Volusia County, Florida, was conducted in 2009 by the U.S. Geological Survey. Water-level data collected at 20 monitoring sites (17 groundwater and 3 lake sites) in...
Pore- and fracture-filling gas hydrate reservoirs in the Gulf of Mexico Gas Hydrate Joint Industry Project Leg II Green Canyon 955 H well
Myung W. Lee, T. S. Collett
2012, Marine and Petroleum Geology (34) 62-71
High-quality logging-while-drilling (LWD) downhole logs were acquired in seven wells drilled during the Gulf of MexicoGasHydrateJointIndustryProjectLegII in the spring of 2009. Well logs obtained in one of the wells, the GreenCanyon Block 955Hwell (GC955-H), indicate that a 27.4-m thick zone at the depth of 428 m below sea floor (mbsf;...
Lithostratigraphy from downhole logs in Hole AND-1B, Antarctica
Trevor Williams, Roger H. Morin, Richard D. Jarrard, Chris L. Jackolski, Stuart A. Henrys, Frank Niessen, Diana Magens, Gerhard Kuhn, Donata Monien, Ross D. Powell
2012, Geosphere (8) 127-140
The ANDRILL (Antarctic Drilling Project) McMurdo Ice Shelf (MIS) project drilled 1285 m of sediment in Hole AND–1B, representing the past 12 m.y. of glacial history. Downhole geophysical logs were acquired to a depth of 1018 mbsf (meters below seafloor), and are complementary to data acquired from the core. The...
The physical hydrogeology of ore deposits
Steven E. Ingebritsen, M.S. Appold
2012, Economic Geology (107) 559-584
Hydrothermal ore deposits represent a convergence of fluid flow, thermal energy, and solute flux that is hydrogeologically unusual. From the hydrogeologic perspective, hydrothermal ore deposition represents a complex coupled-flow problem—sufficiently complex that physically rigorous description of the coupled thermal (T), hydraulic (H), mechanical (M), and chemical (C) processes (THMC modeling)...
Climate change and infectious disease dynamics
Raina K. Plowright, Paul C. Cross, Gary Tabor, Emily S. Almberg, Leslie Bienen, Peter J. Hudson
A. Alonso Aguirre, Richard S. Ostfeld, Peter Daszak, editor(s)
2012, Book chapter, New directions in conservation medicine: applied cases of ecological health
The Stanford-U.S. Geological Survey SHRIMP ion microprobe--a tool for micro-scale chemical and isotopic analysis
Charles R. Bacon, Marty Grove, Jorge A. Vazquez, Matthew A. Coble
2012, Fact Sheet 2012-3067
Answers to many questions in Earth science require chemical analysis of minute volumes of minerals, volcanic glass, or biological materials. Secondary Ion Mass Spectrometry (SIMS) is an extremely sensitive analytical method in which a 5–30 micrometer diameter "primary" beam of charged particles (ions) is focused on a region of a...
Rodent middens reveal episodic, long-distance plant colonizations across the hyperarid Atacama Desert over the last 34,000 years
Francisca P. Diaz, Claudio Latorre, Antonio Maldonado, Jay Quade, Julio L. Betancourt
2012, Journal of Biogeography (39) 510-525
Aim To document the impact of late Quaternary pluvial events on plant movements between the coast and the Andes across the Atacama Desert, northern Chile. Location Sites are located along the lower and upper fringes of absolute desert (1100–2800 m a.s.l.), between the western slope of the...
Quantifying components of the hydrologic cycle in Virginia using chemical hydrograph separation and multiple regression analysis
Ward E. Sanford, David L. Nelms, Jason P. Pope, David L. Selnick
2012, Scientific Investigations Report 2011-5198
This study by the U.S. Geological Survey, prepared in cooperation with the Virginia Department of Environmental Quality, quantifies the components of the hydrologic cycle across the Commonwealth of Virginia. Long-term, mean fluxes were calculated for precipitation, surface runoff, infiltration, total evapotranspiration (ET), riparian ET, recharge, base flow (or groundwater discharge)...
Demonstrating usefulness of real-time monitoring at streambank wells coupled with active streamgages - Pilot studies in Wyoming, Montana, and Mississippi
Cheryl A. Eddy-Miller, Jim Constantz, Jerrod D. Wheeler, Rodney R. Caldwell, Jeannie R.B. Barlow
2012, Fact Sheet 2012-3054
Groundwater and surface water in many cases are considered separate resources, but there is growing recognition of a need to treat them as a single resource. For example, groundwater inflow during low streamflow is vitally important to the health of a stream for many reasons, including buffering temperature, providing good...
Evaluation of NDVI to assess avian abundance and richness along the upper San Pedro River
T.M. McFarland, Charles van Riper III, G. E. Johnson
2012, Journal of Arid Environments (77) 45-53
Remote-sensing models have become increasingly popular for identifying, characterizing, monitoring, and predicting avian habitat but have largely focused on single bird species. The Normalized Difference Vegetation Index (NDVI) has been shown to positively correlate with avian abundance and richness and has been successfully applied to southwestern riparian systems which are...
Temporally irregular breeding of western spadefoot toads (Spea hammondii) in managed wetlands
Luke A. Groff, Walter G. Duffy, Sharon N. Kahara, Shannon J. Chapin
2012, Northwestern Naturalist (93) 79-83
Soil greenhouse gas fluxes during wetland forest retreat along the Lower Savannah River, Georgia (USA)
Ken W. Krauss, Julie L. Whitbeck
2012, Wetlands (32) 73-81
Tidal freshwater forested wetlands (tidal swamps) are periodically affected by salinity intrusion at seaward transitions with marsh, which, along with altered hydrology, may affect the balance of gaseous carbon (C) and nitrogen (N) losses from soils. We measured greenhouse gas emissions (CO2, CH4, N2O) from healthy, moderately degraded, and degraded...
New Eclipidrilus species (Annelida, Clitellata, Lumbriculidae) from southeastern North America
Steven V. Fend, David R. Lenat
2012, Zootaxa (3194) 51-67
Three new species of Lumbriculidae from southeastern North America are attributed to Eclipidrilus Eisen. All are small worms (diameter 0.2–0.5 mm), having semi-prosoporous male ducts with the atria in X, and spermathecae in IX. Eclipidrilus breviatriatus n. sp. and E. microthecus n. sp. have crosshatched atrial musculature, similar to some...
A brief history and summary of the effects of river engineering and dams on the Mississippi River system and delta
Jason S. Alexander, Richard C. Wilson, W. Reed Green
2012, Circular 1375
The U.S. Geological Survey Forecast Mekong project is providing technical assistance and information to aid management decisions and build science capacity of institutions in the Mekong River Basin. A component of this effort is to produce a synthesis of the effects of dams and other engineering structures on large-river hydrology,...
Acute toxicity of cadmium, lead, zinc, and their mixtures to stream-resident fish and invertebrates
Christopher A. Mebane, Frank S. Dillon, Daniel P. Hennessy
2012, Environmental Toxicology and Chemistry (31) 1334-1348
The authors conducted 150 tests of the acute toxicity of resident fish and invertebrates to Cd, Pb, and Zn, separately and in mixtures, in waters from the South Fork Coeur d'Alene River watershed, Idaho, USA. Field-collected shorthead sculpin (Cottus confusus), westslope cutthroat trout (Oncorhynchus clarkii lewisi), two mayflies (Baetis tricaudatus...
Geomorphic response of the Sandy River, Oregon, to removal of Marmot Dam
Jon J. Major, Jim E. O'Connor, Charles J. Podolak, Mackenzie K. Keith, Gordon E. Grant, Kurt R. Spicer, Smokey Pittman, Heather M. Bragg, J. Rose Wallick, Dwight Q. Tanner, Abagail Rhode, Peter R. Wilcock
2012, Professional Paper 1792
The October 2007 breaching of a temporary cofferdam constructed during removal of the 15-meter (m)-tall Marmot Dam on the Sandy River, Oregon, triggered a rapid sequence of fluvial responses as ~730,000 cubic meters (m3) of sand and gravel filling the former reservoir became available to a high-gradient river. Using direct...
