3D near-to-surface conductivity reconstruction by inversion of VETEM data using the distorted Born iterative method
G.L. Wang, W.C. Chew, T.J. Cui, A.A. Aydiner, D.L. Wright, D.V. Smith
2004, Inverse Problems (20)
Three-dimensional (3D) subsurface imaging by using inversion of data obtained from the very early time electromagnetic system (VETEM) was discussed. The study was carried out by using the distorted Born iterative method to match the internal nonlinear property of the 3D inversion problem. The forward solver was based on the...
Mineralogy at Meridiani Planum from the Mini-TES experiment on the opportunity rover
P. R. Christensen, M.B. Wyatt, T.D. Glotch, A.D. Rogers, S. Anwar, R. E. Arvidson, J. L. Bandfield, D.L. Blaney, C. Budney, W. M. Calvin, A. Fallacaro, R.L. Fergason, N. Gorelick, T.G. Graff, V.E. Hamilton, A. G. Hayes, J. R. Johnson, A.T. Knudson, H.Y. McSween Jr., G.L. Mehall, L.K. Mehall, J.E. Moersch, R.V. Morris, M. D. Smith, S. W. Squyres, S. W. Ruff, M.J. Wolff
2004, Science (306) 1733-1739
The Miniature Thermal Emission Spectrometer (Mini-TES) on Opportunity investigated the mineral abundances and compositions of outcrops, rocks, and soils at Meridiani Planum. Coarse crystalline hematite and olivine-rich basaltic sands were observed as predicted from orbital TES spectroscopy. Outcrops of aqueous origin are composed of 15 to 35% by volume magnesium...
Acoustic-tracking and radio-tracking of horseshoe crabs to assess spawning behavior and subtidal habitat use in delaware bay
L. J. Brousseau, M. Sclafani, D. R. Smith, Daniel B. Carter
2004, North American Journal of Fisheries Management (24) 1376-1384
This study used telemetry to determine spawning behavior and subtidal habitat use of horseshoe crabs Limulus polyphemus. We attached combined acoustic and radio transmitters to 12 gravid female horseshoe crabs at Ted Harvey Beach and 12 at North Bowers Beach (both on the western shore of Delaware Bay) over a...
Tailrace Egress of yearling and subyearling Chinook salmon and juvenile steelhead following juvenile bypass system passage at John Day Dam, 2002
C. D. Smith, Theresa L. Liedtke, B.J. Hausmann, Jacquelyn L. Schei, J.R. Lyng, L.P. Gee, John W. Beeman
2004, Report
No abstract available....
Immunomodulation and disease resistance in postyearling rainbow trout infected with Myxobolus cerebralis, the causative agent of whirling disease
Christine L. Densmore, Christopher A. Ottinger, Vicki S. Blazer, Luke R. Iwanowicz, D. R. Smith
2004, Journal of Aquatic Animal Health (16) 73-82
Myxobolus cerebralis, the myxosporean parasite that causes whirling disease, has a number of deleterious effects on its salmonid host. Although it is well established that juvenile salmonids in the active stages of whirling disease mount an immune response to the pathogen, the occurrence and longevity of any related immunomodulatory effects...
Estimating survival and recruitment in a freshwater mussel population using mark-recapture techniques
R.F. Villella, D. R. Smith, D. P. Lemarie
2004, American Midland Naturalist (151) 114-133
We used a mark-recapture method and model averaging to estimate apparent survival, recruitment and rate of population growth in a native freshwater mussel population at a site on the Cacapon River, which is a tributary to the Potomac River. Over 2200 Elliptio complanata, E. fisheriana and Lampsilis cariosa were uniquely...
Effects of surface applications of biosolids on soil, crops, ground water, and streambed sediment near Deer Trail, Colorado, 1999-2003
Tracy J.B. Yager, David B. Smith, James G. Crock
2004, Scientific Investigations Report 2004-5289
The U.S. Geological Survey, in cooperation with Metro Wastewater Reclamation District and North Kiowa Bijou Groundwater Management District, studied natural geochemical effects and the effects of biosolids applications to the Metro Wastewater Reclamation District properties near Deer Trail, Colorado, during 1999 through 2003 because of public concern about potential contamination...
A guide to sampling freshwater mussel populations
David L. Strayer, David R. Smith
2003, Book
No abstract available....
Final report VETEM (Very Early Time Electromagnetic) system survey of Pit 4 and Pit 10 subsurface disposal area, Radioactive Waste Management Complex, Idaho National Engineering and Environmental Laboratory, Idaho Falls, ID
Jared D. Abraham, David Von G. Smith, David L. Wright
2003, Open-File Report 2003-140
No abstract available....
Determining the toxicity potential of mine-waste piles
Kathleen S. Smith, Thomas R. Wildeman, LaDonna M. Choate, Sharon F. Diehl, David L. Fey, Philip L. Hageman, James F. Ranville, Rosalia Rojas, Bruce D. Smith
2003, Open-File Report 2003-210
Helicopter electromagnetic and magnetic survey data and maps, Seco Creek area, Medina and Uvalde counties, Texas
Bruce D. Smith, David V. Smith, Patricia L. Hill, Victor F. Labson
2003, Open-File Report 2003-226
A helicopter electromagnetic and magnetic (HEM) survey was completed of a 209 square kilometer (81 square miles) area of the central Edwards aquifer. This open-file report is a release of the airborne geophysical data and a summary of the hydrologic application. The survey area was centered on the Valdina Farms...
Biosolids, soils, ground-water, and streambed-sediment data for a biosolids-application area near Deer Trail, Colorado, 1999
Michael R. Stevens, Tracy J.B. Yager, D. B. Smith, J.G. Crock
2003, Open-File Report 2002-51
In January 1999, the U.S. Geological Survey began an expanded monitoring program near Deer Trail, Colorado, in cooperation with the Metro Wastewater Reclamation District and the North Kiowa Bijou Groundwater Management District. Monitoring components were biosolids, soils, crops, ground water, and streambed sediments. The monitoring program addresses concerns from the...
Flooding in Illinois, April-June 2002
Charles Avery, D.F. Smith
2003, Open-File Report 2002-487
Widespread flooding occurred throughout most of Illinois in spring 2002 as a result of multiple intense rainstorms that moved through the State during an extended 2-month period from the third week in April through the month of May in central and southern Illinois, the first week in June in northern...
A proposal for upgrading the National-Scale Soil Geochemical Database for the United States
David B. Smith, Martin B. Goldhaber, Michael A. Wilson, Rebecca Burt
2003, Fact Sheet 015-03
Recurring middle Pleistocene outburst floods in east-central Alaska
D.G. Froese, D.G. Smith, J.A. Westgate, T. A. Ager, S.J. Preece, A. Sandhu, R.J. Enkin, F. Weber
2003, Quaternary Research (60) 50-62
Recurring glacial outburst floods from the Yukon-Tanana Upland are inferred from sediments exposed along the Yukon River near the mouth of Charley River in east-central Alaska. Deposits range from imbricate gravel and granules indicating flow locally extending up the Yukon valley, to more distal sediments consisting of at least 10...
Passage behavior of radio-tagged yearling Chinook salmon at Bonneville Dam, 2002: Revised for corrected spill annual report
S.D. Evans, L.S Wright, C. D. Smith, R.E. Wardell, N.S. Adams, D.W. Rondorf
2003, Report
Abstract not available ...
Large carnivores response to recreational big game hunting along the Yellowstone National Park and Absaroka-Beartooth Wilderness boundary
T.E. Ruth, D.W. Smith, M.A. Haroldson, P.C. Buotte, C.C. Schwartz, H.B. Quigley, S. Cherry, D. Tyres, K. Frey
2003, Wildlife Society Bulletin (31) 1150-1161
The Greater Yellowstone Ecosystem contains the rare combination of an intact guild of native large carnivores, their prey, and differing land management policies (National Park versus National Forest; no hunting versus hunting). Concurrent field studies on large carnivores allowed us to investigate activities of humans and carnivores on Yellowstone National...
Interaction of sea water and lava during submarine eruptions at mid-ocean ridges
M.R. Perfit, J.R. Cann, D.J. Fornari, J. Engels, D.K. Smith, W.I. Ridley, M.H. Edwards
2003, Nature (426) 62-65
Lava erupts into cold sea water on the ocean floor at mid-ocean ridges (at depths of 2,500 m and greater), and the resulting flows make up the upper part of the global oceanic crust. Interactions between heated sea water and molten basaltic lava could exert significant control on the dynamics...
Scale-dependent temporal variations in stream water geochemistry
S.A. Nagorski, J.N. Moore, Temple E. McKinnon, D. B. Smith
2003, Environmental Science & Technology (37) 859-864
A year-long study of four western Montana streams (two impacted by mining and two “pristine”) evaluated surface water geochemical dynamics on various time scales (monthly, daily, and bi-hourly). Monthly changes were dominated by snowmelt and precipitation dynamics. On the daily scale, post-rain surges in some solute and particulate concentra tions...
The distribution of uranium over Europe: Geological and environmental significance
J.A. Plant, S. Reeder, R. Salminen, D. B. Smith, T. Tarvainen, B. de Vivo, M.G. Petterson
2003, Transactions of the Institution of Mining and Metallurgy, Section B: Applied Earth Science (112) 221-238
The variation of baseline levels of uranium in soil and stream sediments over Europe is described, based on new data prepared by the Forum of European Geological Surveys (FOREGS). The samples have been collected and analysed according to the protocols established for the International Union of Geological Sciences/International Association of...
Three-dimensional imaging of buried objects in very lossy earth by inversion of VETEM data
T.J. Cui, A.A. Aydiner, W.C. Chew, D.L. Wright, D.V. Smith
2003, IEEE Transactions on Geoscience and Remote Sensing (41) 2197-2210
The very early time electromagnetic system (VETEM) is an efficient tool for the detection of buried objects in very lossy earth, which allows a deeper penetration depth compared to the ground-penetrating radar. In this paper, the inversion of VETEM data is investigated using three-dimensional (3-D) inverse scattering techniques, where multiple...
Influence of eastern hemlock (Tsuga canadensis L.) on fish community structure and function in headwater streams of the Delaware River basin
R. M. Ross, R. M. Bennett, C.D. Snyder, J.A. Young, D. R. Smith, D. P. Lemarie
2003, Ecology of Freshwater Fish (12) 60-65
Hemlock (Tsuga canadensis) forest of the eastern U.S. are in decline due to invasion by the exotic insect hemlock woolly adelgid (Adelges tsugae). Aquatic biodiversity in hemlock ecosystems has not been documented; thus the true impact of the infestation cannot be assessed. We compared ichthyofaunal assemblages and trophic structure of...
Morphology and composition of the surface of Mars: Mars Odyssey THEMIS results
P. R. Christensen, J. L. Bandfield, J.F. Bell III, N. Gorelick, V.E. Hamilton, A. Ivanov, B. M. Jakosky, H. H. Kieffer, M. D. Lane, M. C. Malin, T. McConnochie, A. S. McEwen, H.Y. McSween Jr., G.L. Mehall, J.E. Moersch, K.H. Nealson, J. W. Rice Jr., M.I. Richardson, S. W. Ruff, M. D. Smith, T.N. Titus, M.B. Wyatt
2003, Science (300) 2056-2061
The Thermal Emission Imaging System (THEMIS) on Mars Odyssey has produced infrared to visible wavelength images of the martian surface that show lithologically distinct layers with variable thickness, implying temporal changes in the processes or environments during or after their formation. Kilometer-scale exposures of bedrock are observed; elsewhere airfall dust...
Assessment of sampling methods to estimate horseshoe crab (Limulus polyphemus L.) egg density in Delaware Bay
P.S. Pooler, D. R. Smith, R.E. Loveland, M.L. Botton, S.F. Michels
2003, Fishery Bulletin (101) 698-703
[No abstract available]...
Discovery of Olivine in the Nili Fossae Region of Mars
T.M. Hoefen, R. N. Clark, J. L. Bandfield, M. D. Smith, J.C. Pearl, P. R. Christensen
2003, Science (302) 627-630
We have detected a 30,000-square-kilometer area rich in olivine in the Nili Fossae region of Mars. Nili Fossae has been interpreted as a complex of grabens and fractures related to the formation of the Isidis impact basin. We propose that post-impact faulting of this area has exposed subsurface layers rich...
