Combined use of borehole geophysics and packers to site potable wells in a contaminated area in Montville, Connecticut
A. Green, John W. Lane Jr., Carole D. Johnson, John H. Williams, Remo A. Mondazzi, Peter K. Joesten
2004, Conference Paper, Proceedings: 2004 U.S. EPA/NGWA Fractured Rock Conference
A leaking underground gasoline tank contaminated a crystalline bedrock aquifer in Montville, Connecticut, USA with MTBE and benzene. At the original residential bedrock supply wells, the median MTBE concentration was 165 micrograms per liter (mg/L), and the median benzene concentration was 320 mg/L. The maximum concentrations of MTBE and...
Global climate change and wildlife in North America
D.B. Inkley, Michael G. Anderson, Andrew R Blaustein, Virginia Burkett, Benjamin Felzer, Brad Griffith, Jeff Price, Terry L. Root
2004, Technical Review 04-2
It is widely accepted by the scientific community that the earth, which has always experienced climate variation, is now undergoing a period of rapid climate change that is enhanced by anthropogenic atmospheric carbon enrichment during the past 100 years. These climatic changes are accelerating and projections for the next 100 years indicate extensive warming in most...
Analysis of summer 2002 melt extent on the Greenland ice sheet using MODIS and SSM/I data
D. K. Hall, R.S. Williams, K. Steffen, Janet Y.L. Chien
2004, Conference Paper, IGARSS '04 Proceedings
Previous work has shown that the summer of 2002 had the greatest area of snow melt extent on the Greenland ice sheet ever recorded using passive-microwave data. In this paper, we compare the 0deg isotherm derived from the Moderate-Resolution Imaging Spectroradiometer (MODIS) instrument, with Special Sensor Microwave/Imager (SSM/I)-derived melt, at...
Leaky coastal margins; examples of enhanced coastal groundwater and surface-water exchange from Tampa Bay and Crescent Beach submarine spring, Florida, USA
P.W. Swarzenski, J. L. Kindinger
A.H.D. Cheng, D. Ouazar, editor(s)
2004, Book chapter, Coastal aquifer management: Monitoring, modeling, and case studies
No abstract available...
Strength and acoustic properties of Ottawa sand containing laboratory-formed methane gas hydrate
William J. Winters, William F. Waite, David H. Mason
2004, Book chapter, Advances in the study of gas hydrates
Although gas hydrate occurs in a wide variety of sediment types and is present and even pervasive at some locations on continental margins, little is known about how it forms naturally. Physical properties of the resultant gas hydrate-sediment mixtures, data needed for input into models that predict location and quantity...
The history of recent limnological changes and human impact on Upper Klamath Lake, Oregon
J. Platt Bradbury, Steve M. Colman, Richard L. Reynolds
2004, Journal of Paleolimnology (31) 165
Hypereutrophic Upper Klamath Lake has been studied for almost 50 years to evaluate the nature, cause, and effects of its very productive waters. Mitigation of undesirable effects of massive cyanobacterial blooms requires understanding their modern causes as well as their history. Knowledge of the pre-settlement natural limnology of this system...
Using MODIS Terra 250 m imagery to map concentrations of total suspended matter in coastal waters
R. L. Miller, Brent A. McKee
2004, Remote Sensing of Environment (93) 259-266
User's Guide for the MapImage Reprojection Software Package, Version 1.01
Michael P. Finn, Jason R. Trent
2004, Open-File Report 2004-1394
Scientists routinely accomplish small-scale geospatial modeling in the raster domain, using high-resolution datasets (such as 30-m data) for large parts of continents and low-resolution to high-resolution datasets for the entire globe. Recently, Usery and others (2003a) expanded on the previously limited empirical work with real geographic data by compiling and...
Book review: Earth’s magnetism in the age of sail
Jeffrey J. Love
2004, Physics of the Earth and Planetary Interiors (147) 354-364
For many centuries, the source, behavior, and even the essential nature of geomagnetism were enigmatic. Despite this, the effect of geomagnetism was familiar, by imparting a directional preference on the magnetized needle of the compass and providing a useful, if somewhat annoyingly complicated, reference for navigators. Although the compass seems...
Inversion of data from electrical resistivity imaging surveys in water-covered areas
M. H. Loke, John W. Lane Jr.
2004, Exploration Geophysics (35) 266-271
Electrical resistivity imaging surveys widely used in many environmental and engineering studies have also been conducted in water-covered areas. Surveys in water-covered areas include conventional surveys using multi-electrode resistivity systems where part of the survey line crosses a river or stream, and surveys conducted entirely within a water-covered environment. Surveys...
A viscoelastic damage model with applications to stable and unstable fracturing
Yariv Hamiel, Yunfeng Liu, V. Lyakhovsky, Yehuda Ben-Zion, David Lockner
2004, Geophysical Journal International (159) 1155-1165
A viscoelastic damage rheology model is presented that provides a generalization of Maxwell viscoelasticity to a non-linear continuum mechanics framework incorporating material degradation and recovery, transition from stable to unstable fracturing and gradual accumulation of non-reversible deformation. The model is a further development of the damage rheology framework of Lyakhovsky et...
A precipitation-runoff model for the analysis of the effects of water withdrawals and land-use change on streamflow in the Usquepaug–Queen River Basin, Rhode Island
Phillip J. Zarriello, Gardner C. Bent
2004, Scientific Investigations Report 2004-5139
The 36.1-square-mile Usquepaug–Queen River Basin in south-central Rhode Island is an important water resource. Streamflow records indicate that withdrawals may have diminished flows enough to affect aquatic habitat. Concern over the effect of withdrawals on streamflow and aquatic habitat prompted the development of a Hydrologic Simulation Program–FORTRAN (HSPF) model...
Effects of aquifer travel time on nitrogen transport to a coastal embayment
John A. Colman, John P. Masterson, Wendy J. Pabich, Donald A. Walter
2004, Groundwater (42) 1069-1078
Effects of aquifer travel time on nitrogen reaction and loading to Popponesset Bay, a eutrophic coastal embayment on western Cape Cod, Massachusetts, are evaluated through hydrologic analysis of flow and transport. Approximately 10% of the total nitrogen load to the embayment is intercepted by fresh water ponds and delivered to...
Landsat-5 bumper-mode geometric correction
James C. Storey, Mike Choate
2004, IEEE Transactions on Geoscience and Remote Sensing (42) 2695-2703
The Landsat-5 Thematic Mapper (TM) scan mirror was switched from its primary operating mode to a backup mode in early 2002 in order to overcome internal synchronization problems arising from long-term wear of the scan mirror mechanism. The backup bumper mode of operation removes the constraints on scan start and...
Ground water recharge and discharge in the central Everglades
Judson W. Harvey, Steven L. Krupa, James M. Krest
2004, Groundwater (42) 1090-1102
Rates of ground water recharge and discharge are not well known in the central Everglades. Here we report estimates of ground water recharge and discharge at 15 sites in the Everglades Nutrient Removal Project and in Water Conservation Area 2A (WCA-2A), along with measurements of hydraulic properties of peat at...
Style and rate of quaternary deformation of the Hosgri Fault Zone, offshore south-central coastal California
Kathryn L. Hanson, William R. Lettis, Marcia McLaren, William U. Savage, N. Timothy Hall
Margaret A. Keller, editor(s)
2004, Bulletin 1995-BB
The Hosgri Fault Zone is the southernmost component of a complex system of right-slip faults in south-central coastal California that includes the San Gregorio, Sur, and San Simeon Faults. We have characterized the contemporary style of faulting along the zone on the basis of an integrated analysis of a broad...
Real-time forecasts of tomorrow's earthquakes in California: A new mapping tool
Matt Gerstenberger, Stefan Wiemer, Lucy Jones
2004, Open-File Report 2004-1390
We have derived a multi-model approach to calculate time-dependent earthquake hazard resulting from earthquake clustering. This file report explains the theoretical background behind the approach, the specific details that are used in applying the method to California, as well as the statistical testing to validate the technique. We...
Evaluating the effect of salinity on a simulated American Crocodile (Crocodylus acutus) population with applications to conservation and Everglades restoration
Paul M. Richards, Wolf M. Mooij, Donald L. DeAngelis
2004, Ecological Modelling (180) 371-394
Everglades restoration will alter the hydrology of South Florida, affecting both water depth and salinity levels in the southern fringes of the Everglades, the habitat of the endangered American crocodile (Crocodylus acutus). A key question is what the effects of these hydrologic changes will be on the crocodile population. Reliable...
Calibration strategies for a groundwater model in a highly dynamic alpine floodplain
L. Foglia, P. Burlando, Mary C. Hill, S. Mehl
2004, Conference Paper
Most surface flows to the 20-km-long Maggia Valley in Southern Switzerland are impounded and the valley is being investigated to determine environmental flow requirements. The aim of the investigation is the devel-opment of a modelling framework that simulates the dynamics of...
Icelandic analogs to Martian flood lavas
Laszlo P. Keszthelyi, Thorvaldur Thordarson, Alfred McEwen, Henning Haack, Marie-Noelle Guilbaud, Stephen Self, Matti J. Rossi
2004, Geochemistry, Geophysics, Geosystems (5)
We report on new field observations from Icelandic lava flows that have the same surface morphology as many Martian flood lava flows. The Martian flood lavas are characterized by a platy‐ridged surface morphology whose formation is not well understood. The examples on Mars include some of...
LIDAR derived 5m resolution bare earth and first return digital elevation model of the Paine Run Watershed, Augusta County, Virginia
Peter G. Chirico
2004, Open-File Report 2004-1320
Topogrid Derived 10 Meter Resolution Digital Elevation Model of the Shenandoah National Park and Surrounding Region, Virginia
Peter G. Chirico, Seth D. Tanner
2004, Open-File Report 2004-1321
Explanation The purpose of developing a new 10m resolution DEM of the Shenandoah National Park Region was to more accurately depict geologic structure, surfical geology, and landforms of the Shenandoah National Park Region in preparation for automated landform classification. Previously, only a 30m resolution DEM was available through the National Elevation...
Transtensional deformation in the Lake Tahoe region, California and Nevada, USA
Richard A. Schweickert, M.M. Lahren, K.D. Smith, J. F. Howle, G. Ichinose
2004, Tectonophysics (392) 303-323
Dextral transtensional deformation is occurring along the Sierra Nevada–Great Basin boundary zone (SNGBBZ) at the eastern edge of the Sierra Nevada microplate. In the Lake Tahoe region of the SNGBBZ, transtension is partitioned spatially and temporally into domains of north–south striking normal faults and transitional domains with conjugate strike-slip faults....
Topographic controls on post-Oligocene changes in ice-sheet dynamics, Prydz Bay region, east Antarctica
J. Taylor, M Siegert, A. J. Payne, M. J. Hambrey, P.E. O’Brien, A. K. Cooper, G. Leitchenkov
2004, Geology (32) 197-200
Within the general trend of post-Eocene cooling, the largest and oldest outlet of the East Antarctic Ice Sheet underwent a change from ice-cliff to ice-stream and/or ice-shelf dynamics, with an associated switch from line-source to fan sedimentation. Available geological data reveal little about the causes of these changes in ice...
Assessing conceptual models for subsurface reactive transport of inorganic contaminants
James A. Davis, Steven B. Yabusaki, Carl Steefel, John M. Zachara, Gary P. Curtis, George D. Redden, Louise J. Criscenti, Bruce D. Honeyman
2004, Eos, Transactions, American Geophysical Union (85) 449-445
In many subsurface situations where human health and environmental quality are at risk (e.g., contaminant hydrogeology petroleum extraction, carbon sequestration, etc.),scientists and engineers are being asked by federal agency decision-makers to predict the fate of chemical species under conditions where both reactions and transport are processes of first-order importance.In 2002,...
