Retrospective Review of Watershed Characteristics and a Framework for Future Research in the Sarasota Bay Watershed, Florida
George R. Kish, Arnell S. Harrison, Mark Alderson
2008, Open-File Report 2007-1349
The U.S. Geological Survey, in cooperation with the Sarasota Bay Estuary Program conducted a retrospective review of characteristics of the Sarasota Bay watershed in west-central Florida. This report describes watershed characteristics, surface- and ground-water processes, and the environmental setting of the Sarasota Bay watershed. Population growth during the last 50 years...
Time-averaged near-bed suspended sediment concentrations under waves and currents: Comparison of measured and model estimates
D.A. Cacchione, P.D. Thorne, Y Agrawal, N.J. Nidzieko
2008, Article
Profiles of suspended sediment concentration and velocity were measured over a 15-day period at a near-shore site off Santa Cruz, CA in Monterey Bay. The concentration and velocity data were collected with an Acoustic Backscattering System (ABS) and Acoustic Current Profiler (ACP) that were mounted on a bottom tripod. High-resolution...
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2006
James P. Dixon, Scott D. Stihler, John A. Power, Cheryl Searcy
2008, Data Series 326
Between January 1 and December 31, 2006, AVO located 8,666 earthquakes of which 7,783 occurred on or near the 33 volcanoes monitored within Alaska. Monitoring highlights in 2006 include: an eruption of Augustine Volcano, a volcanic-tectonic earthquake swarm at Mount Martin, elevated seismicity and volcanic unrest at Fourpeaked Mountain, and...
Climate simulation and flood risk analysis for 2008-40 for Devils Lake, North Dakota
Aldo V. Vecchia
2008, Scientific Investigations Report 2008-5011
Devils Lake and Stump Lake in northeastern North Dakota receive surface runoff from a 3,810-square-mile drainage basin, and evaporation provides the only major water loss unless the lakes are above their natural spill elevation to the Sheyenne River. In September 2007, flow from Devils Lake to Stump Lake had...
Variations in Community Exposure and Sensitivity to Tsunami Hazards on the Open-Ocean and Strait of Juan de Fuca Coasts of Washington
Nathan Wood, Christopher Soulard
2008, Scientific Investigations Report 2008-5004
Evidence of past events and modeling of potential future events suggest that tsunamis are significant threats to communities on the open-ocean and Strait of Juan de Fuca coasts of Washington. Although potential tsunami-inundation zones from a Cascadia Subduction Zone (CSZ) earthquake have been delineated, the amount and type of human...
Preliminary Gravity and Ground Magnetic Data in the Arbuckle Uplift near Sulphur, Oklahoma
Daniel S. Scheirer, Essam Aboud
2008, Open-File Report 2008-1003
Improving knowledge of the geology and geophysics of the Arbuckle Uplift in south-central Oklahoma is a goal of the Framework Geology of Mid-Continent Carbonate Aquifers project sponsored by the United States Geological Survey (USGS) National Cooperative Geologic Mapping Program (NCGMP). In May 2007, we collected ground magnetic and gravity observations...
Potentiometric Surfaces in the Springfield Plateau and Ozark Aquifers of Northwestern Arkansas, Southeastern Kansas, Southwestern Missouri, and Northeastern Oklahoma, 2006
Jonathan A. Gillip, John B. Czarnecki, Douglas N. Mugel
2008, Scientific Investigations Report 2007-5253
The Springfield Plateau and Ozark aquifers are important sources of ground water in the Ozark Plateaus aquifer system. Water from these aquifers is used for agricultural, domestic, industrial, and municipal water sources. Changing water use over time in these aquifers presents a need for updated potentiometric-surface maps of the Springfield...
Summary of Survival Data from Juvenile Coho Salmon in the Klamath River, Northern California, 2007
John W. Beeman
2008, Open-File Report 2008-1022
A study to estimate the effects of Iron Gate Dam discharge on ESA-listed juvenile coho salmon during their seaward migration to the ocean was begun in 2005. Estimates of survival through various reaches of river downstream from the dam were completed in 2006 and 2007 as part of this process....
Recovery of Ground-Water Levels From 1988 to 2003 and Analysis of Potential Water-Supply Management Options in Critical Area 1, East-Central New Jersey
Frederick J. Spitz, Martha K. Watt, Vincent T. dePaul
2008, Scientific Investigations Report 2007-5193
Water levels in four confined aquifers in the New Jersey Coastal Plain within Water Supply Critical Area 1 have recovered as a result of reductions in ground-water withdrawals initiated by the State in the late 1980s. The aquifers are the Wenonah-Mount Laurel, the Upper and Middle Potomac-Raritan-Magothy, and Englishtown aquifer...
Magmatic and tectonic evolution of the Caetano caldera, north-central Nevada: A tilted, mid-Tertiary eruptive center and source of the Caetano Tuff
David A. John, Christopher D. Henry, Joseph P. Colgan
2008, Geosphere (4) 75-106
The Caetano Tuff is a late Eocene, rhyolite ash-flow tuff that crops out within an ∼90-km-long, east-west–trending belt in north-central Nevada, previously interpreted as an elongate graben or “volcano-tectonic trough.” New field, petrographic, geochemical, and geochronologic data show that: (1) the east half of the “trough” is actually the Caetano...
A prominent geophysical feature along the northern Nevada rift and its geologic implications, north-central Nevada
David A. Ponce, Jonathan M.G. Glen
2008, Geosphere (4) 207-217
We consider the origin and character of a prominent large-scale geophysical feature in north-central Nevada that is coincident with the western margin of the northern Nevada rift—a mid-Miocene rift that includes mafic dike swarms and associated volcanic rocks expressed by a NNW-striking magnetic anomaly. The geophysical feature also correlates with...
Large-magnitude Miocene extension of the Eocene Caetano caldera, Shoshone and Toiyabe Ranges, Nevada
Joseph P. Colgan, David A. John, Christopher D. Henry, Robert J. Fleck
2008, Geosphere (4) 107-130
Because major mineral deposits in north-central Nevada predate significant Basin and Range extension, a detailed understanding of the timing and kinematics of extensional faulting is necessary to place these deposits in their original structural context. The complexity of pre-Cenozoic deformation in northern Nevada makes restoring Basin and Range faulting difficult...
Abundance Trends and Status of the Little Colorado River Population of Humpback Chub: An Update Considering 1989-2006 Data
Coggins Jr.
2008, Open-File Report 2007-1402
EXECUTIVE SUMMARY In 1967, the humpback chub (Gila cypha) (HBC) was added to the federal list of endangered species and is today protected under the Endangered Species Act of 1973. Only six populations of humpback chub are currently known to exist, five in the Colorado River Basin above Lees Ferry, Arizona,...
Modeling landscape evapotranspiration by integrating land surface phenology and a water balance algorithm
Gabriel B. Senay
2008, Algorithms (1) 52-68
The main objective of this study is to present an improved modeling technique called Vegetation ET (VegET) that integrates commonly used water balance algorithms with remotely sensed Land Surface Phenology (LSP) parameter to conduct operational vegetation water balance modeling of rainfed systems at the LSP’s spatial scale using readily available...
Integrating modelling and remote sensing to identify ecosystem performance anomalies in the boreal forest, Yukon River Basin, Alaska
B.K. Wylie, L. Zhang, Norman B. Bliss, Lei Ji, Larry L. Tieszen, W. M. Jolly
2008, International Journal of Digital Earth (1) 196-220
High-latitude ecosystems are exposed to more pronounced warming effects than other parts of the globe. We develop a technique to monitor ecological changes in a way that distinguishes climate influences from disturbances. In this study, we account for climatic influences on Alaskan boreal forest performance with a data-driven model. We...
Palaeoclimate
Eystein Jansen, Jonathan Overpeck, Keith R. Briffa, Jean-Claude Duplessy, Fortunat Joos, Valerie Masson-Delmotte, Daniel Olago, Bette Otto-Bliesner, W. Richard Peltier, Stefan Rahmstorf, Rengaswamy Ramesh, Dominique Raynaud, David Rind, Olga Solomina, Ricardo Villalba, De’er Zhang, Jean-Marc Barnola, Eva M. Bauer, Esther Brady, Mark Chandler, Julia E. Cole, Edward R. Cook, Esla Cortijo, Trond Dokken, Dominik Fleitmann, Masa Kageyama, Myriam Khodri, Laurent Labeyrie, Alexander Laine, Anders Levermann, E. Mosley-Thompson, Daniel R. Muhs, Raimund Muscheler, Tim Osborn, Oyvind Paasche, Frederic Parrenin, Gian-Kasper Plattner, Henry Pollack, Renato Spahni, Lowell D. Stott, Lonnie Thompson, Claire Waelbroeck, Gregory Wiles, James Zachos, Zhangteng Guo
Susan Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K.B. Averyt, M. Tignor, H. L. Miller, editor(s)
2008, Book chapter, Climate change 2007: The physical science basis
This chapter assesses palaeoclimatic data and knowledge of how the climate system changes over interannual to millennial time scales, and how well these variations can be simulated with climate models. Additional palaeoclimatic perspectives are included in other chapters. Palaeoclimate science has made significant advances since the 1970s, when a primary...
Analysis of a spatial point pattern: Examining the damage to pavement and pipes in Santa Clara Valley resulting from the Loma Prieta earthquake
G. A. Phelps
2008, Open-File Report 2007-1442
This report describes some simple spatial statistical methods to explore the relationships of scattered points to geologic or other features, represented by points, lines, or areas. It also describes statistical methods to search for linear trends and clustered patterns within the scattered point data. Scattered points are often contained within...
A modified siphon sampler for shallow water
Timothy H. Diehl
2008, Scientific Investigations Report 2007-5282
A modified siphon sampler (or 'single-stage sampler') was developed to sample shallow water at closely spaced vertical intervals. The modified design uses horizontal rather than vertical sample bottles. Previous siphon samplers are limited to water about 20 centimeters (cm) or more in depth; the modified design can sample water 10...
Volcan Baru: Eruptive History and Volcano-Hazards Assessment
David R. Sherrod, James W. Vallance, Arkin Tapia Espinosa, John P. McGeehin
2008, Open-File Report 2007-1401
Volcan Baru is a potentially active volcano in western Panama, about 35 km east of the Costa Rican border. The volcano has had four eruptive episodes during the past 1,600 years, including its most recent eruption about 400?500 years ago. Several other eruptions occurred in the prior 10,000 years. Several...
Converting NAD83 GPS Heights Into NAVD88 Elevations With LVGEOID, a Hybrid Geoid Height Model for the Long Valley Volcanic Region, California
Maurizio Battaglia, Daniel Dzurisin, John O. Langbein, Jerry Svarc, David P. Hill
2008, Scientific Investigations Report 2007-5255
A GPS survey of leveling benchmarks done in Long Valley Caldera in 1999 showed that the application of the National Geodetic Survey (NGS) geoid model GEOID99 to tie GPS heights to historical leveling measurements would significantly underestimate the caldera ground deformation (known from other geodetic measurements). The NGS geoid model...
ET–The key to balancing the water budget in the Southwest
Michael T. Moreo, Nancy A. Damar, Randell J. Laczniak
2008, Southwest Hydrology (7) 28-33
Throughout the Southwest, state and federal water-resource managers are becoming increasingly concerned about the impacts of future groundwater development on the region’s limited water resources, environmentally sensitive ecosystems, and rural lifestyle. To address their concerns, scientists and engineers are deploying physically based mathematical models to assess and predict the potential...
Advances and limitations of individual-based models to analyze and predict dynamics of mangrove forests: A review
Uta Berger, Victor H. Rivera-Monroy, Thomas W. Doyle, Farid Dahdouh-Guebas, N.C. Duke, Martha L. Fontalvo-Herazo, Hanno Hildenbrandt, Nico Koedam, Ulf Mehlig, Cyril Piou, Robert R. Twilley
2008, Aquatic Botany (89) 260-274
Mangrove ecosystems are considered vulnerable to climate change as coastal development limits the ecosystem services and adaptations important to their survival. Although they appear rather simple in terms of species diversity, their ecology is complex due to interacting geophysical forces of tides, surface...
Database for Assessment Unit-Scale Analogs (Exclusive of the United States)
Ronald R. Charpentier, T. R. Klett, Emil Attanasi
2008, Open-File Report 2007-1404
This publication presents a database of geologic analogs useful for the assessment of undiscovered oil and gas resources. Particularly in frontier areas, where few oil and gas fields have been discovered, assessment methods such as discovery process models may not be usable. In such cases, comparison of the assessment area...
Artificial recharge through a thick, heterogeneous unsaturated zone
John A. Izbicki, Alan L. Flint, Christina L. Stamos
2008, Groundwater
Thick, heterogeneous unsaturated zones away from large streams in desert areas have not previously been considered suitable for artificial recharge from ponds. To test the potential for recharge in these settings, 1.3 x 106 m3 of water was infiltrated through a 0.36-ha pond along Oro Grande Wash near Victorville, California,...
An interactive Bayesian geostatistical inverse protocol for hydraulic tomography
Michael N. Fienen, Tom Clemo, Peter K. Kitanidis
2008, Water Resources Research (44)
Hydraulic tomography is a powerful technique for characterizing heterogeneous hydrogeologic parameters. An explicit trade-off between characterization based on measurement misfit and subjective characterization using prior information is presented. We apply a Bayesian geostatistical inverse approach that is well suited to accommodate a flexible model with the level of complexity driven...
