Sand mining impacts on long-term dune erosion in southern Monterey Bay
E.B. Thornton, Abby Sallenger, Juan Conforto Sesto, L. Egley, Timothy McGee, Rost Parsons
2006, Marine Geology (229) 45-58
Southern Monterey Bay was the most intensively mined shoreline (with sand removed directly from the surf zone) in the U.S. during the period from 1906 until 1990, when the mines were closed following hypotheses that the mining caused coastal erosion. It is estimated that the yearly averaged amount of mined...
Hurricanes 2004: An overview of their characteristics and coastal change
Asbury H. Sallenger Jr., Hilary Stockdon, Laura A. Fauver, Mark Hansen, David Thompson, C. Wayne Wright, Jeff Lillycrop
2006, Estuaries and Coasts (29) 880-888
Four hurricanes battered the state of Florida during 2004, the most affecting any state since Texas endured four in 1884. Each of the storms changed the coast differently. Average shoreline change within the right front quadrant of hurricane force winds varied from 1 m of shoreline advance to 20 m...
Geochemistry of the Amazon Estuary
Joseph M. Smoak, James M. Krest, Peter W Swarzenski
2006, Book chapter, Handbook of environmental chemistry
The Amazon River supplies more freshwater to the ocean than any other river in the world. This enormous volume of freshwater forces the estuarine mixing out of the river channel and onto the continental shelf. On the continental shelf, the estuarine mixing occurs in a very dynamic environment unlike that of...
The utility of gravity and magnetic methods for understanding subsurface hydrogeology in large alluvial watersheds: Examples from urbanized basins of the Western United States
V. J. S. Grauch, Victoria Langenheim
2006, Conference Paper, Symposium on the application of geophysics to engineering and environmental problems proceedings
Population continues to grow rapidly within the large alluvial watersheds associated with structural basins of the Basin and Range Province and the Rio Grande rift of the western United States. Increasing demands on ground‐water resources in these basins, combined with water‐rights disputes, have amplified the need for improved understanding of...
Resistivity imaging in eastern Nevada Using the audiomagnetotelluric method for hydrogeologic framework studies
Darcy McPhee, Louise Pellerin, B. A. Churchel, Janet E. Tilden, Gary L. Dixon
2006, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2006
Inversion of audiomagnetotelluric (AMT) sounding data collected in eastern Nevada shows significant structure within the upper kilometer of the subsurface that defines the geologic framework from which hydrologic models will be developed. We collected AMT data along two profiles in Spring and Cave valleys in 2004–2005, using the Geometrics StrataGem...
LIDAR & SASW technologies for geotechnical earthquake engineering
Robert Kayen, Brian D. Collins
2006, Conference Paper, Symposium on the application of geophysics to engineering and environmental problems 2006
Geotechnical engineering methods are validated through comparison of field‐data of surface deformations and sub‐surface state properties. Recent advances in non‐invasive surface imaging and sub‐surface stiffness characterization allow us to rapidly and inexpensively map these spatial and physical properties in two and three dimensions. In this paper, we discuss new technologies...
Ground-water levels in Huron County, Michigan, 2004-05
T. L. Weaver, S. L. Crowley, S. P. Blumer
2006, Open-File Report 2005-1082-B
In 1990, the U.S. Geological Survey (USGS) completed a study of the hydrogeology of Huron County, Michigan (Sweat, 1991). In 1993, Huron County and the USGS entered into a continuing agreement to measure water levels at selected wells throughout Huron County. As part of the agreement, USGS has operated four...
Reconnaissance borehole geophysical, geological, and hydrological data from the proposed hydrodynamic compartments of the Culpeper Basin in Loudoun, Prince William, Culpeper, Orange, and Fairfax Counties, Virginia
Michael P. Ryan, Herbert A. Pierce, Carole D. Johnson, David M. Sutphin, David L. Daniels, Joseph P. Smoot, John K. Costain, Cahit Coruh, George E. Harlow Jr.
2006, Open-File Report 2006-1203
The Culpeper basin is part of a much larger system of ancient depressions or troughs, that lie inboard of the Atlantic Coastal Plain, and largely within the Applachian Piedmont Geologic Province of eastern North America, and the transition region with the neighboring Blue Ridge Geologic Province. This basin system formed...
EAARL submarine topography: Biscayne National Park
John Brock, C. Wayne Wright, Matt Patterson, Amar Nayegandhi, Judd Patterson, Melanie S. Harris, Lance Mosher
2006, Open-File Report 2006-1118
This lidar-derived submarine topography map was produced as a collaborative effort between the U.S. Geological Survey (USGS) Coastal and Marine Geology Program, National Park Service (NPS) South Florida/Caribbean Network Inventory and Monitoring Program, and the National Aeronautics and Space Administration (NASA) Wallops Flight Facility. One objective of this research is...
EAARL topography: Dry Tortugas National Park
John Brock, C. Wayne Wright, Matt Patterson, Amar Nayegandhi, Judd Patterson
2006, Open-File Report 2006-1244
This lidar-derived submarine topography map was produced as a collaborative effort between the U.S. Geological Survey (USGS) Coastal and Marine Geology Program, National Park Service (NPS) South Florida/Caribbean Network Inventory and Monitoring Program, and the National Aeronautics and Space Administration (NASA) Wallops Flight Facility. One objective of this research is...
Determination of the δ15N of total nitrogen in solids; RSIL lab code 2893
Kinga Revesz, Haiping Qi, Tyler B. Coplen
2006, Techniques and Methods 10-C11
The purpose of the Reston Stable Isotope Laboratory (RSIL) lab code 2893 is to determine the δ(15N/14N), abbreviated as δ15N , of total nitrogen in solid samples. A Carlo Erba NC 2500 elemental analyzer (EA) is used to convert total nitrogen in a solid sample into N2 gas. The EA...
The role of reproductive behavior in the conservation of fishes: examples from the Great Plains riverine fishes
M. L. Wildhaber
2006, American Currents (34) 16-23
Recovery efforts for threatened and endangered fish species are hampered by lack of knowledge of their reproductive ecology. Habitat requirements and environmental stimuli necessary for reproduction are often unknown and vary widely among species. For Great Plains riverine fishes, this is often complicated by the high turbidity of the system...
Streamstats: U.S. Geological Survey web application for streamflow statistics for Connecticut
Elizabeth A. Ahearn, Kernell G. Ries III, Peter A. Steeves
2006, Fact Sheet 2006-3129
Introduction An important mission of the U. S. Geological Survey (USGS) is to provide information on streamflow in the Nation's rivers. Streamflow statistics are used by water managers, engineers, scientists, and others to protect people and property during floods and droughts, and to manage land, water, and biological resources. Common uses...
USGS reports latest land-water changes for southeastern Louisiana
John A. Barras, James B. Johnston
2006, Fact Sheet 2006-3030
The USGS National Wetlands Research Center is reporting that a total of 118 square miles of land has been transformed to new water areas in a 9,742 square mile area from the Chandeleur Islands to the Atchafalaya River. This area encompasses the basins of Breton Sound, Mississippi River, Pearl River,...
Geology Highlights of Ride the Rockies! Cortez to Canon City June 18-June 23, 2006
Water Resources Division, U.S. Geological Survey
2006, General Information Product 37
Cartography for lunar exploration: 2006 status and planned missions
Randolph L. Kirk, Brent A. Archinal, Lisa R. Gaddis, Mark R. Rosiek
2006, Conference Paper, Symposium of ISPRS Commission IV
The initial spacecraft exploration of the Moon in the 1960s–70s yielded extensive data, primarily in the form of film and television images, that were used to produce a large number of hardcopy maps by conventional techniques. A second era of exploration, beginning in the early 1990s, has produced digital data...
USGS Magellan stereomapping of Venus
Elpitha Howington-Kraus, Randolph L. Kirk, Donna M. Galuszka, Bonnie L. Redding
2006, Conference Paper, Symposium of ISPRS Commission IV
This paper describes our methods for generating high resolution Digital Terrain Models (DTMs) of Venus using Magellan synthetic aperture radar (SAR) stereoimages, and the sensor model we developed for Magellan stereomapping on our digital photogrammetric workstation running SOCET SET (® BAE SYSTEMS). In addition to demonstrating the validity of our...
Fish health study Ashtabula River natural resource damage assessment
V. S. Blazer, L. R. Iwanowicz, P. C. Baumann
2006, Open-File Report 2006-1137
INTRODUCTION The Ashtabula River is located in northeast Ohio, flowing into Lake Erie at Ashtabula, Ohio. Tributaries include Fields Brook, Hubbard Run, Strong Brook, and Ashtabula Creek. The bottom sediments, bank soils and biota of Fields Brook have been severely contaminated by unregulated discharges of hazardous substances. Hazardous substances have migrated...
The Late-Holocene evolution of the Miseno area (south-western Campi Flegrei) as inferred by stratigraphy, petrochemistry and 40Ar/39Ar geochronology:Chapter 6 in Volcanism in the Campania Plain — Vesuvius, Campi Flegrei and Ignimbrites
Donatella Insinga, Andrew T. Calvert, Marvin A. Lanphere, Vincenzo Morra, Annamaria Perrotta, Marco Sacchi, Claudio Scarpati, James Saburomaru, Lorenzo Fedele
2006, Developments in Volcanology (9) 97-124
This study on terrestrial and marine successions increases the understanding of the Late-Holocene volcanological and stratigraphical evolution of the south-western part of Campi Flegrei caldera.Stratigraphic data derived from field studies of two major tuff vents located along the coastal zone, namely Porto Miseno and Capo Miseno, clearly indicate...
Concentrations, loads, and yields of particle-associated contaminants in urban creeks, Austin, Texas, 1999-2004
B.J. Mahler, P. C. Van Metre, J.T. Wilson, A.L. Guilfoyle, M.W. Sunvison
2006, Scientific Investigations Report 2006-5262
Concentrations, loads, and yields of particle-associated (hydrophobic) contaminants (PACs) in urban runoff in creeks in Austin, Texas, were characterized using an innovative approach: large-volume suspended-sediment sampling. This approach isolates suspended sediment from the water column in quantities sufficient for direct chemical analysis of PACs. During 1999-2004, samples were collected after...
Integrated Science: Providing a More Complete Understanding of Complex Problems
Water Resources Division, U.S. Geological Survey
2006, Fact Sheet 2006-3056
Integration among sciences is critical in order to address some of our most pressing problems. Because of the inherent complexity of natural systems, and the increasing complexity of human demands on them, narrowly-focused approaches are no longer sufficient. USGS Workshop on Enhancing Integrated Science, November 1998. The Mid-Continent Geographic Science Center is...
Diffuse-flow conceptualization and simulation of the Edwards aquifer, San Antonio region, Texas
R. J. Lindgren
2006, Scientific Investigations Report 2006-5319
A numerical ground-water-flow model (hereinafter, the conduit-flow Edwards aquifer model) of the karstic Edwards aquifer in south-central Texas was developed for a previous study on the basis of a conceptualization emphasizing conduit development and conduit flow, and included simulating conduits as one-cell-wide, continuously connected features. Uncertainties regarding the degree to...
Vascular Plant and Vertebrate Inventory of Montezuma Castle National Monument
Cecilia A. Schmidt, Charles A. Drost, William Lee Halvorson
2006, Open-File Report 2006-1163
Executive Summary We summarize past inventory efforts for vascular plants and vertebrates at Montezuma Castle National Monument (NM) in Arizona. We used data from previous research to compile complete species lists for the monument and to assess inventory completeness. There have been 784 species recorded at Montezuma Castle NM, of which 85...
Vascular Plant and Vertebrate Inventory of Saguaro National Park, Rincon Mountain District
Brian F. Powell, William Lee Halvorson, Cecilia A. Schmidt
2006, Open-File Report 2006-1075
Executive Summary This report summarizes the results of the first comprehensive inventory of plants and vertebrates at the Rincon Mountain District (RMD) of Saguaro National Park, Arizona. From 2001 to 2003 we surveyed for vascular plants and vertebrates (amphibians, reptiles, birds, and mammals) at the district to document the presence of...
Land Cover Trends Project
William Acevedo
2006, Fact Sheet 2006-3020
The Land Cover Trends Project is designed to document the types, rates, causes, and consequences of land cover change from 1973 to 2000 within each of the 84 U.S. Environmental Protection Agency (EPA) Level III ecoregions that span the conterminous United States. The project's objectives are to: * Develop a comprehensive...
