Efficient estimators for adaptive stratified sequential sampling
M. Salehi, M. Moradi, Jennifer Brown, David R. Smith
2010, Journal of Statistical Computation and Simulation (80) 1163-1179
In stratified sampling, methods for the allocation of effort among strata usually rely on some measure of within-stratum variance. If we do not have enough information about these variances, adaptive allocation can be used. In adaptive allocation designs, surveys are conducted in two phases. Information from the first phase is...
An incomplete analysis
David Smith, Eric M. Hallerman, Michael J. Millard, John A. Sweka, Richard G. Weber
2009, BioScience (59) 541-541
Niles and colleagues (2009) do not present all of the data relevant to the issues they address in the article they wrote for BioScience. They reference unnamed sources for pre-1997 horseshoe crab harvest to conclude that recent harvest exceeds historic harvest. In fact, reported landings from New Jersey, Delaware, Maryland,...
Preliminary results of the North American Soil Geochemical Landscapes Project, northeast United States and Maritime Provinces of Canada
Eric C. Grunsky, David B. Smith, Peter W.B. Friske, Laurel G. Woodruff
2009, Conference Paper, 24th International Applied Geochemistry Symposium
The results of a soil geochemical survey of the Canadian Maritime provinces and the northeast states of the United States are described. The data presented are for the <2-mm fraction of the surface layer (0-5 cm depth) and C horizons of the soil. Elemental determinations were made by ICP-MS following...
U.S. Geological Survey Science for the Wyoming Landscape Conservation Initiative - 2008 Annual Report
Zachary H. Bowen, Cameron L. Aldridge, Patrick J. Anderson, Timothy J. Assal, Lori Anne Baer, R. Sky Bristol, Natasha B. Carr, Geneva W. Chong, Jay E. Diffendorfer, Bradley C. Fedy, Steven L. Garman, Steve Germaine, Richard I. Grauch, Collin G. Homer, Daniel J. Manier, Matthew J. Kauffman, Natalie Latysh, Cynthia P. Melcher, Kirk A. Miller, Jessica Montag, Constance J. Nutt, Christopher Potter, Hall Sawyer, David B. Smith, Michael J. Sweat, Anna B. Wilson
2009, Open-File Report 2009-1201
The Wyoming Landscape Conservation Initiative (WLCI) was launched in 2007 in response to concerns about threats to the State's world class wildlife resources, especially the threat posed by rapidly increasing energy development in southwest Wyoming. The overriding purpose of the WLCI is to assess and enhance aquatic and terrestrial habitats...
Geochemical studies of North American soils: results from the pilot study phase of the North American Soil Geochemical Landscapes Project
David B. Smith
2009, Applied Geochemistry (24) 1355-1356
No abstract available....
Biosolids, Crop, and Ground-Water Data for a Biosolids-Application Area Near Deer Trail, Colorado, 2004 Through 2006
Tracy J.B. Yager, David B. Smith, James G. Crock
2009, Data Series 379
From 2004 through 2006, the U.S. Geological Survey monitored the chemical composition of biosolids, crops, dust, and ground water related to biosolids applications near Deer Trail, Colorado, in cooperation with the Metro Wastewater Reclamation District. This monitoring effort was a continuation of the monitoring program begun in 1999 in cooperation...
Comparative status and assessment of Limulus polyphemus with emphasis on the New England and Delaware Bay populations
David Smith, Michael J. Millard, Ruth H. Carmichael
2009, Book chapter, Biology and Conservation of Horseshoe Crabs
Increases in harvest of the American horseshoe crab (Limulus polyphemus) during the 1990s, particularly for whelk bait, coupled with decreases in species that depend on their eggs has reduced horseshoe crab abundance, threatened their ecological relationships, and dictated precautionary management of the horseshoe crab resource. Accordingly, population assessments and monitoring...
Bjørn Bølviken - 2008 IAGC Vernadsky medalist
David B. Smith
2008, Newsletter of the International Association of GeoChemistry (49) 6-6
Prof. Bjørn Bølviken, 80, formerly with the Geological Survey of Norway, was the 2nd recipient of the IAGC's Vernadsky Medal. The IAGC Vernadsky Medal is awarded biennially to a single person for a distinguished record of scientific accomplishment in geochemistry over the course of a career. Dr. David Smith of...
Major- and trace-element concentrations in soils from northern California: Results from the Geochemical Landscapes Project pilot study
Jean Morrison, Martin B. Goldhaber, JoAnn M. Holloway, David B. Smith
2008, Open-File Report 2008-1306
In 2004, the U.S. Geological Survey (USGS), the Geological Survey of Canada (GSC), and the Mexican Geological Survey (Servicio Geologico Mexicano, or SGM) initiated pilot studies in preparation for a soil geochemical survey of North America called the Geochemical Landscapes Project. The purpose of this project is to provide...
Three-Dimensional Geologic Model of Complex Fault Structures in the Upper Seco Creek Area, Medina and Uvalde Counties, South-Central Texas
Michael P. Pantea, J. C. Cole, Bruce D. Smith, Jason R. Faith, Charles D. Blome, David V. Smith
2008, Scientific Investigations Report 2008-5131
This multimedia report shows and describes digital three-dimensional faulted geologic surfaces and volumes of the lithologic units of the Edwards aquifer in the upper Seco Creek area of Medina and Uvalde Counties in south-central Texas. This geologic framework model was produced using (1) geologic maps and interpretations of depositional environments...
Distribution of Igneous Rocks in Medina and Uvalde Counties, Texas, as Inferred from Aeromagnetic Data
David V. Smith, Robert R. McDougal, Bruce D. Smith, Charles D. Blome
2008, Scientific Investigations Report 2007-5191
A high-resolution aeromagnetic survey was flown in 2001 over Medina and Uvalde Counties, Texas, as part of a multi-disciplinary investigation of the geohydrologic framework of the Edwards aquifer in south-central Texas. The objective of the survey was to assist in mapping structural features that influence aquifer recharge and ground-water flow....
Major- and Trace-Element Concentrations in Soils from Two Geochemical Surveys (1972 and 2005) of the Denver, Colorado, Metropolitan Area
James E. Kilburn, David B. Smith, L. Graham Closs, Steven M. Smith
2007, Data Series 299
Introduction This report contains major- and trace-element concentration data for soil samples collected in 1972 and 2005 from the Denver, Colorado, metropolitan area. A total of 405 sites were sampled in the 1972 study from an area approximately bounded by the suburbs of Golden, Thornton, Aurora, and Littleton to the west,...
Intersex (Testicular Oocytes) in smallmouth bass from the Potomac River and selected nearby drainages
Vicki S. Blazer, Luke R. Iwanowicz, Deborah D. Iwanowicz, David R. Smith, John A. Young, J.D. Hedrick, S.W. Foster, S.J. Reeser
2007, Journal of Aquatic Animal Health (19) 242-253
Intersex, or the presence of characteristics of both sexes, in fishes that are normally gonochoristic has been used as an indicator of exposure to estrogenic compounds. In 2003, during health assessments conducted in response to kills and a high prevalence of skin lesions observed in smallmouth bass Micropterus dolomieu in...
Application of municipal biosolids to dry-land wheat fields - A monitoring program near Deer Trail, Colorado (USA). A presentation for an international conference: "The Future of Agriculture: Science, Stewardship, and Sustainability", August 7-9, 2006, Sacramento, CA
James G. Crock, David B. Smith, Tracy J.B. Yager
2006, Open-File Report 2006-1286
Since late 1993, Metro Wastewater Reclamation District of Denver (Metro District), a large wastewater treatment plant in Denver, Colorado, has applied Grade I, Class B biosolids to about 52,000 acres of non-irrigated farmland and rangeland near Deer Trail, Colorado. In cooperation with the Metro District in 1993, the U.S. Geological...
Major- and trace-element concentrations in soils from two continental-scale transects of the United States and Canada
David B. Smith, William F. Cannon, Laurel G. Woodruff, Robert G. Garrett, Rodney Klassen, James E. Kilburn, John D. Horton, Harley D. King, Martin B. Goldhaber, Jean Morrison
2005, Open-File Report 2005-1253
This report contains major- and trace-element concentration data for soil samples collected from 265 sites along two continental-scale transects in North America. One of the transects extends from northern Manitoba to the United States-Mexico border near El Paso, Tex. and consists of 105 sites. The other transect approximately follows the...
Calibrating a tensor magnetic gradiometer using spin data
Robert E. Bracken, David V. Smith, Philip J. Brown
2005, Scientific Investigations Report 2005-5045
Scalar magnetic data are often acquired to discern characteristics of geologic source materials and buried objects. It is evident that a great deal can be done with scalar data, but there are significant advantages to direct measurement of the magnetic gradient tensor in applications with nearby sources, such as unexploded...
Biosolids, soil, crop, ground-water, and streambed-sediment data for a biosolids-application area near Deer Trail, Colorado, 2002-2003
Tracy J.B. Yager, David B. Smith, James G. Crock
2004, Open-File Report 2004-1404
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...
Biosolids, soil, crop, ground-water, and streambed-sediment data for a biosolids-application area near Deer Trail, Colorado, 2001
Tracy J.B. Yager, David B. Smith, James G. Crock
2004, Open-File Report 2004-1388
In January 1999, the U.S. Geological Survey (USGS) 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 sediment. The monitoring program addresses concerns from...
Preliminary 40Ar/39Ar geochronology of igneous intrusions from Uvalde County, Texas: Defining a more precise eruption history for the southern Balcones Volcanic Province
Daniel P. Miggins, Charles D. Blome, David V. Smith
2004, Open-File Report 2004-1031
No abstract available....
Biosolids, Soil, Crop, Ground-Water, and Streambed-Sediment Data for a Biosolids-Application Area Near Deer Trail, Colorado, 2000
Tracy J.B. Yager, David B. Smith, James G. Crock, Michael R. Stevens
2004, Open-File Report 2003-400
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 public...
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....
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...
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
