Simulation of Water Levels and Salinity in the Rivers and Tidal Marshes in the Vicinity of the Savannah National Wildlife Refuge, Coastal South Carolina and Georgia
Paul Conrads, Edwin A. Roehl, Ruby C. Daamen, Wiley M. Kitchens
2006, Scientific Investigations Report 2006-5187
The Savannah Harbor is one of the busiest ports on the East Coast of the United States and is located downstream from the Savannah National Wildlife Refuge, which is one of the Nation?s largest freshwater tidal marshes. The Georgia Ports Authority and the U.S. Army Corps of Engineers funded hydrodynamic...
Heat flow in Railroad Valley, Nevada and implications for geothermal resources in the south-central Great Basin
Colin F. Williams, John H. Sass
2006, Geothermal Resources Council Transactions (30) 111-116
The Great Basin is a province of high average heat flow (approximately 90 mW m-2), with higher values characteristic of some areas and relatively low heat flow (<60 mW m-2) characteristic of an area in south-central Nevada known as the Eureka Low. There is hydrologic and thermal evidence that the...
Evaluation of baseline ground-water conditions in the Mosteiros, Ribeira Paul, and Ribeira Fajã Basins, Republic of Cape Verde, West Africa, 2005-06
Victor M. Heilweil, John D. Earle, Jay R. Cederberg, Mickey M. Messer, Brent E. Jorgensen, Ingrid M. Verstraeten, Miguel A. Moura, Arrigo Querido, Spencer, Tatiana Osorio
2006, Scientific Investigations Report 2006-5207
This report documents current (2005-06) baseline ground-water conditions in three basins within the West African Republic of Cape Verde (Mosteiros on Fogo, Ribeira Paul on Santo Antão, and Ribeira Fajã on São Nicolau) based on existing data and additional data collected during this study. Ground-water conditions (indicators) include ground-water levels,...
Landsat-7 long-term acquisition plan radiometry - evolution over time
Brian L. Markham, Samuel Goward, Terry Arvidson, Julia A. Barsi, Pat Scaramuzza
2006, Photogrammetric Engineering and Remote Sensing (72) 1129-1135
The Landsat-7 Enhanced Thematic Mapper Plus instrument has two selectable gains for each spectral band. In the acquisition plan, the gains were initially set to maximize the entropy in each scene. One unintended consequence of this strategy was that, at times, dense vegetation saturated band 4 and deserts saturated all...
National Assessment of Shoreline Change Part 3: Historical Shoreline Change and Associated Coastal Land Loss Along Sandy Shorelines of the California Coast
Cheryl J. Hapke, David Reid, Bruce M. Richmond, Peter Ruggiero, Jeff List
2006, Open-File Report 2006-1219
Beach erosion is a chronic problem along many open-ocean shores of the United States. As coastal populations continue to grow and community infrastructures are threatened by erosion, there is increased demand for accurate information regarding past and present trends and rates of shoreline movement. There is also a need for...
Borehole geophysical logging and aquifer-isolation tests conducted in well MG-1693 at North Penn Area 5 Superfund Site near Colmar, Montgomery County, Pennsylvania
Philip H. Bird
2006, Scientific Investigations Report 2006-5014
Borehole geophysical logging and aquifer-isolation (packer) tests were conducted in well MG-1693 (NP-87) at the North Penn Area 5 Superfund Site near Colmar, Montgomery County, Pa. Objectives of the study were to identify the depth and yield of water-bearing zones, occurrence of vertical borehole flow, and effects of pumping on...
Catastrophe, recovery and range limitation in NE Pacific kelp forests: a large-scale perspective
Matthew S. Edwards, James A. Estes
2006, MEPS (320) 79-87
The 1997–98 El Niño was one of the strongest on record and resulted in widespread losses of the giant kelp Macrocystis pyrifera (Agardh) along the west coast of North America. Drawing on a rich history of studies that have shown abnormally large waves and warm nutrient-poor water associated with El Niños to...
Under the Golden Gate Bridge — Views of the sea floor near the entrance to San Francisco Bay, California
Peter Dartnell, Patrick L. Barnard, John L. Chin, Daniel Hanes, Rikk G. Kvitek, Pat J. Iampietro, James V. Gardner
2006, Scientific Investigations Map 2917
San Francisco Bay in Northern California is one of the largest and most altered estuaries within the United States. The sea floor within the bay as well as at its entrance is constantly changing due to strong tidal currents, aggregate mining, dredge disposal, and the creation of new land using...
Dealing with uncertainty and sensitivity issues in process-based models of carbon and nitrogen cycles in northern forest ecosystems
Guy R. Larocque, Jagtar S. Bhatti, A.M. Gordon, N. Luckai, Jinxun Liu, Shuguang Liu, P.A. Arp, C.F. Zhang, A Komarov, P. Grabarnik, M. Wattenbach, C. Peng, Jianfeng Sun, Thomas White
2006, Conference Paper
Many process-based models on carbon (C) and nitrogen (N) cycles have been developed for northern forest ecosystems. These models are widely used to evaluate the long-term decisions in forest management dealing with effects like particulate pollution, productivity and climate change. Regarding climate change, one of the key questions that have...
Monitored natural attenuation of chlorinated solvents: Moving beyond reductive dechlorination
Karen M. Vangelas, Brian B. Looney, Tom O. Early, Tyler Gilmore, Francis H. Chapelle, Karen M. Adams, Claire H. Sink
2006, Remediation Journal (16) 5-23
Monitored natural attenuation (MNA), while a remedy of choice for many sites, can be challenging when the contaminants are chlorinated solvents. Even with many high-quality technical guidance references available, there continue to be challenges implementing MNA at some chlorinated solvent sites. The U.S. Department of Energy, as one organization facing...
USGS analysis of the Australian UNCLOS submission
Deborah R. Hutchinson, Robert W. Rowland
2006, Open-File Report 2006-1073
In November 2004, the Government of Australia made a submission to the Commission on the Limits of the Continental Shelf (CLCS) for 10 extended continental shelf (ECS) regions, utilizing Article-76 of the United Nations Convention on the Law of the Sea (UNCLOS). With information provided in the Australian Executive Summary,...
Submarine radial vents on Mauna Loa Volcano, Hawai'i
V. Dorsey Wanless, M.O. Garcia, F. A. Trusdell, J.M. Rhodes, M.D. Norman, Dominique Weis, D.J. Fornari, M.D. Kurz, Herve Guillou
2006, Geochemistry, Geophysics, Geosystems (7)
A 2002 multibeam sonar survey of Mauna Loa's western flank revealed ten submarine radial vents and three submarine lava flows. Only one submarine radial vent was known previously. The ages of these vents are constrained by eyewitness accounts, geologic relationships, Mn-Fe coatings, and geochemical stratigraphy; they range from 128 years...
New products from the shuttle radar topography mission
Dean B. Gesch, Tom Farr, James Slater, Jan-Peter Muller, Sally Cook
2006, Eos, Transactions, American Geophysical Union (87) 174
New data products with broad applicability to the Earth sciences are now available from the Shuttle Radar Topography Mission (SRTM). SRTM, a joint project of the National Geospatial-Intelligence Agency (NGA) and NASA, flew aboard the Space Shuttle Endeavour on an 11-day mission in February 2000 with the goal of collecting...
Evaluation of hydrologic conditions and nitrate concentrations in the Rio Nigua de Salinas alluvial fan aquifer, Salinas, Puerto Rico, 2002-03
Jose M. Rodriguez
2006, Scientific Investigations Report 2006-5062
A ground-water quality study to define the potential sources and concentration of nitrate in the Rio Nigua de Salinas alluvial fan aquifer was conducted between January 2002 and March 2003. The study area covers about 3,600 hectares of the coastal plain within the municipality of Salinas in southern Puerto Rico,...
Facing the great disaster : How the men and women of the U.S. Geological Survey responded to the 1906 "San Francisco Earthquake"
Elizabeth M. Colvard, James Rogers
2006, General Information Product 31
It was the most devastating earthquake in California’s history. At 5:12 a.m. on April 18, 1906, the ground under the San Francisco Bay Area shook violently for more than 40 seconds. The magnitude 7.8 earthquake created a rupture along nearly 300 miles of the San Andreas Fault and was felt...
Petroleum system modeling capabilities for use in oil and gas resource assessments
Debra K. Higley, Michael Lewan, Laura N.R. Roberts, Mitchell E. Henry
2006, Open-File Report 2006-1024
Summary: Petroleum resource assessments are among the most highly visible and frequently cited scientific products of the U.S. Geological Survey. The assessments integrate diverse and extensive information on the geologic, geochemical, and petroleum production histories of provinces and regions of the United States and the World. Petroleum systems modeling...
Occurrence of MTBE and other gasoline oxygenates in CWS source waters
Janet M. Carter, Stephen J. Grady, Gregory C. Delzer, Bart Koch, John S. Zogorski
2006, Journal - American Water Works Association (98) 91-104
Results from two national surveys indicate that the gasoline oxygenate methyl tertiary butyl ether (MTBE) is one of the most frequently detected volatile organic compounds in source waters used by community water systems in the United States. Three other ether oxygenates were detected infrequently but almost always co-occurred with MTBE....
The A.D. 1835 eruption of Volcán Cosigüina, Nicaragua: A guide for assessing local volcanic hazards
William E. Scott, Cynthia A. Gardner, Graziella Devoli, Antonio Alvarez
2006, GSA Special Papers (412) 167-187
The January 1835 eruption of Volcán Cosigüina in northwestern Nicaragua was one of the largest and most explosive in Central America since Spanish colonization. We report on the results of reconnaissance stratigraphic studies and laboratory work aimed at better defining the distribution and character of deposits emplaced by the eruption...
Temperature variations at diffuse and focused flow hydrothermal vent sites along the northern East Pacific Rise
Daniel S. Scheirer, Timothy M. Shank, Daniel J. Fornari
2006, Geochemistry, Geophysics, and Geosystems (7)
In the decade following documented volcanic activity on the East Pacific Rise near 9°50′N, we monitored hydrothermal vent fluid temperature variations in conjunction with approximately yearly vent fluid sampling to better understand the processes and physical conditions that govern the evolution of seafloor hydrothermal systems. The temperature of both diffuse...
Conservation of Toll-like receptor signaling pathways in teleost fish
M. K. Purcell, K.D. Smith, A. Aderem, L. Hood, J. R. Winton, J.C. Roach
2006, Comparative Biochemistry and Physiology, Part D: Genomics and Proteomics (1) 77-88
In mammals, toll-like receptors (TLR) recognize ligands, including pathogen-associated molecular patterns (PAMPs), and respond with ligand-specific induction of genes. In this study, we establish evolutionary conservation in teleost fish of key components of the TLR-signaling pathway that act as switches for differential gene induction, including MYD88, TIRAP, TRIF, TRAF6, IRF3,...
The influence of hydrous Mn–Zn oxides on diel cycling of Zn in an alkaline stream draining abandoned mine lands
Christopher L. Shope, Ying Xie, Christopher H. Gammons
2006, Applied Geochemistry (21) 476-491
Many mining-impacted streams in western Montana with pH near or above neutrality display large (up to 500%) diel cycles in dissolved Zn concentrations. The streams in question typically contain boulders coated with a thin biofilm, as well as black mineral crusts composed of hydrous Mn–Zn oxides. Laboratory mesocosm experiments simulating...
Eutrophication of freshwater and marine ecosystems
Val H. Smith, Samantha B. Joye, Robert W. Howarth
2006, Limnology and Oceanography (51) 351-355
Initial understanding of the links between nutrients and aquatic productivity originated in Europe in the early 1900s, and our knowledge base has expanded greatly during the past 40 yr. This explosion of eutrophication-related research has made it unequivocally clear that a comprehensive strategy to prevent excessive amounts of nitrogen and...
Response to comment on “Persistence of pharmaceutical compounds and other organic wastewater contaminants in a conventional drinking-water-treatment plant”
Paul E. Stackelberg, Edward T. Furlong, Michael T. Meyer, Steven D. Zaugg, Alden K. Henderson, Dori B. Reissman
2006, Science of the Total Environment (354) 93-97
The U.S. Geological Survey (USGS) and the Centers for Disease Control thank Dr. Till for her comments concerning our research (Till, 2005) and welcome the opportunity to respond. The primary objective of our study was to evaluate the potential for organic wastewater-related contaminants (OWCs), including pharmaceuticals, to survive a...
Changes in the C storage in Las Tablas de Daimiel National Park (PNTD) in the last 1000 years [Cambios en el almacenamiento de C en el Parque Nacional de Las Tablas de Daimiel (PNTD) en los últimos 1000 años]
F. Dominguez-Castro, J.I. Santisteban, R. Mediavilla, Walter E. Dean, Enrique Lopez-Pamo, Maria Blanca Ruiz-Zapata, Maria Jose Gil-Garcia
2006, Boletin Geologico y Minero (117) 537-544
Las Tablas de Daimiel National Park has suffered too many modifications throughout its history, natural as well as anthropic, which have affected the carbon storage in different ways. The study of those variations has been carried out by the analysis of sedimentary record and historical data. The sedimentary record has...
The significance of ground water to the accumulation of iron and manganese in the sediments of two hydrologically distinct lakes in north‐central Minnesota: A geological perspective
Walter E. Dean, Brian Neff, Donald O. Rosenberry, Thomas C. Winter, Renee S. Parkhurst
2006, Ground Water (41) 951-963
Williams and Shingobee lakes are at opposite ends of the local ground water flow system in the Shingobee River Headwaters Area (SRHA) in north‐central Minnesota. Williams Lake, situated near the highest point in the flow system, has no surface inlet or outlet, and ground water and precipitation are the only...
