MT3DMS: Model use, calibration, and validation
C. Zheng, Mary C. Hill, G. Cao, R. Ma
2012, Transactions of the ASABE (55) 1549-1559
MT3DMS is a three-dimensional multi-species solute transport model for solving advection, dispersion, and chemical reactions of contaminants in saturated groundwater flow systems. MT3DMS interfaces directly with the U.S. Geological Survey finite-difference groundwater flow model MODFLOW for the flow solution and supports the hydrologic and discretization features of MODFLOW. MT3DMS contains...
VS2DI: Model use, calibration, and validation
Richard W. Healy, Hedeff I. Essaid
2012, Transactions of the ASABE (55) 1249-1260
VS2DI is a software package for simulating water, solute, and heat transport through soils or other porous media under conditions of variable saturation. The package contains a graphical preprocessor for constructing simulations, a postprocessor for displaying simulation results, and numerical models that solve for flow and solute transport (VS2DT) and...
Maximizing the utility of monitoring to the adaptive management of natural resources
William L. Kendall, Clinton T. Moore
Robert A. Gitzen, Andrew B. Cooper, Joshua J. Millspaugh, Daniel S. Licht, editor(s)
2012, Book chapter, Design and analysis of long-term ecological monitoring studies
Data collection is an important step in any investigation about the structure or processes related to a natural system. In a purely scientific investigation (experiments, quasi-experiments, observational studies), data collection is part of the scientific method, preceded by the identification of hypotheses and the design of any manipulations of the...
Fluvial transport and surface enrichment of arsenic in semi-arid mining regions: examples from the Mojave Desert, California
Christopher S. Kim, David H. Slack, James J. Rytuba
2012, Journal of Environmental Monitoring (14) 1798-1813
As a result of extensive gold and silver mining in the Mojave Desert, southern California, mine wastes and tailings containing highly elevated arsenic (As) concentrations remain exposed at a number of former mining sites. Decades of weathering and erosion have contributed to the mobilization of As-enriched tailings, which now contaminate...
The principal rare earth elements deposits of the United States: A summary of domestic deposits and a global perspective
Keith R. Long, Bradley S. Van Gosen, Nora K. Foley, Daniel Cordier
2012, Book chapter, Non-renewable resource issues
Demand for the rare earth elements (REE, lanthanide elements) is estimated to be increasing at a rate of about 8% per year due to increasing applications in consumer products, computers, automobiles, aircraft, and other advanced technology products. Much of this demand growth is driven by new technologies that increase...
Comparison of electrical conductivity calculation methods for natural waters
R. Blaine McCleskey, D. Kirk Nordstrom, Joseph N. Ryan
2012, Limnology and Oceanography: Methods (10) 952-967
The capability of eleven methods to calculate the electrical conductivity of a wide range of natural waters from their chemical composition was investigated. A brief summary of each method is presented including equations to calculate the conductivities of individual ions, the ions incorporated, and the method's limitations. The ability of...
Multifractal model of magnetic susceptibility distributions in some igneous rocks
Mark E. Gettings
2012, Nonlinear Processes in Geophysics (19) 635-642
Measurements of in-situ magnetic susceptibility were compiled from mainly Precambrian crystalline basement rocks beneath the Colorado Plateau and ranges in Arizona, Colorado, and New Mexico. The susceptibility meter used measures about 30 cm3 of rock and measures variations in the modal distribution of magnetic minerals that form a minor component...
Benefits and risks of adopting the global code of practice for recreational fisheries
Robert Arlinghaus, T. Douglas Beard Jr., Steven J. Cooke, Ian G. Cowx
2012, Fisheries (37) 165-172
Recreational fishing constitutes the dominant or sole use of many fish stocks, particularly in freshwater ecosystems in Western industrialized countries. However, despite their social and economic importance, recreational fisheries are generally guided by local or regional norms and standards, with few comprehensive policy and development frameworks existing across jurisdictions. We...
Large submarine sand waves and gravel lag substrates on Georges Bank off Atlantic Canada
B.J. Todd, Page C. Valentine
Peter T Harris, E.K. Baker, editor(s)
2012, Book chapter, Seafloor geomorphology as benthic habitat: GeoHab atlas of seafloor geomorphic features and benthic habitats,
Georges Bank is a large, shallow, continental shelf feature offshore of New England and Atlantic Canada. The bank is mantled with a veneer of glacial debris transported during the late Pleistocene from continental areas lying to the north. These sediments were reworked by marine processes during postglacial sea-level transgression and...
The Vegetation Drought Response Index (VegDRI): An integration of satellite, climate, and biophysical data
Brian D. Wardlow, Tsegaye Tadesse, Jesslyn F. Brown, Karin Callahan, Sharmistha Swain, Eric Hunt
Brian D. Wardlow, Martha C. Anderson, James P. Verdin, editor(s)
2012, Book chapter, Remote sensing of drought: innovative monitoring approaches
Land-cover change detection
Xuexia Chen, Chandra Giri, James Vogelmann
2012, Book chapter, Remote Sensing of Land Use and Land Cover
Land cover is the biophysical material on the surface of the earth. Land-cover types include grass, shrubs, trees, barren, water, and man-made features. Land cover changes continuously. The rate of change can be either dramatic and abrupt, such as the changes caused by logging, hurricanes and fire, or subtle and...
Ordovician of the Sauk megasequence in the Ozark region of northern Arkansas and parts of Missouri and adjacent states
Raymond L. Ethington, John E. Repetski, James R. Derby
2012, AAPG Memoir (98) 275-300
Exposures of Ordovician rocks of the Sauk megasequence in Missouri and northern Arkansas comprise Ibexian and lower Whiterockian carbonates with interspersed sandstones. Subjacent Cambrian strata are exposed in Missouri but confined to the subsurface in Arkansas. The Sauk-Tippecanoe boundary in this region is at the base of the St. Peter...
The Glen Canyon Dam adaptive management program: Progress and immediate challenges
John F. Hamill, Theodore S. Melis
Philip J. Boon, Paul J. Raven, editor(s)
2012, Book chapter, River conservation and management
Adaptive management emerged as an important resource management strategy for major river systems in the United States (US) in the early 1990s. The Glen Canyon Dam Adaptive Management Program (‘the Program’) was formally established in 1997 to fulfill a statutory requirement in the 1992 Grand Canyon Protection Act (GCPA). The...
Grizzly Valley fault system, Sierra Valley, CA
Ryan Gold, William Stephenson, Jack Odum, Rich Briggs, Anthony Crone, Steve Angster
2012, Report, Guidebook: neotectonics of the Lake Tahoe and Carson and Sierra Valleys, F.O.P. 2012
The Grizzly Valley fault system (GVFS) strikes northwestward across Sierra Valley, California and is part of a network of active, dextral strike-slip faults in the northern Walker Lane (Figure 1). To investigate Quaternary motion across the GVFS, we analyzed high-resolution (0.25 m) airborne LiDAR data (Figure 2) in combination with...
Ecological impacts of non-native species
John W. Wilkinson
2012, Book chapter, Conservation and decline of amphibians: ecological aspects, effect of humans, and management
Non-native species are considered one of the greatest threats to freshwater biodiversity worldwide (Drake et al. 1989; Allen and Flecker 1993; Dudgeon et al. 2005). Some of the first hypotheses proposed to explain global patterns of amphibian declines included the effects of non-native species (Barinaga 1990; Blaustein and Wake 1990;...
Pathogenic human viruses are present in residential canals
Dale W. Griffin
2012, Book chapter, Tropical connections: south Florida's marine environment
No abstract available....
Pyrethroid insecticides in bed sediments from urban and agricultural streams across the United States
Michelle Hladik, Kathryn Kuivila
2012, Journal of Environmental Monitoring (14) 1838-1845
Pyrethroid insecticides are hydrophobic compounds that partition to streambed sediments and have been shown to cause toxicity to non-target organisms; their occurrence is well documented in parts of California, but there have been limited studies in other urban and agricultural areas across the United States. To broaden geographic understanding of...
Upper Klamath Basin Landsat Image for April 30, 2004: Path 45 Rows 30 and 31
Daniel T. Snyder
2012, Report
This image is a mosaic of Landsat-5 images of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing...
Modeling of land use and reservoir effects on nonpoint source pollution in a highly agricultural basin
Yiping Wu, Shu-Guang Liu
2012, Journal of Environmental Monitoring (14) 2350-2361
Nonpoint source (NPS) pollution is tightly linked to land use activities that determine the sources and magnitudes of pollutant loadings to stream water. The pollutant loads may also be alleviated within reservoirs because of the physical interception resulting from changed hydrological regimes and other biochemical processes. It is important but...
Relationships between yolk androgens and nest density, laying date, and laying order in Western Burrowing Owls (Athene cunicularia hypugaea)
J.L. Welty, J.R. Belthoff, J. Egbert, H. Schwabl
2012, Canadian Journal of Zoology (90) 182-192
Increases in yolk androgens within and among avian clutches have been correlated with decreased incubation time, increased aggression within a nest, increased begging behaviour, decreased immune response, and decreased life span. Although the mechanisms that lead to variability in yolk androgens within and between clutches are not completely known, yolk...
Mississippi Sound
Lawrence R. Handley, Kathryn A. Spear, Ali Leggett, Cindy A. Thatcher
2012, Report, Emergent wetlands status and trends in the northern Gulf of Mexico: 1950-2010
The Mississippi Sound is the primary body of water off the Mississippi Coast, extending from Lake Borgne, La. in the west to Mobile Bay, Ala. in the east and bordered by the barrier islands--Cat, Ship, Horn, Petit Bois, and Dauphin Islands--of Gulf Islands National Seashore to the south (Figure 1)....
Mineral resource of the month: aggregates
Jason C. Willett
2012, Earth (57) 25-25
Crushed stone and construction sand and gravel, the two major types of natural aggregates, are among the most abundant and accessible natural resources on the planet. The earliest civilizations used aggregates for various purposes, mainly construction. Today aggregates provide the basic raw materials for the foundation of modern society....
Upper Klamath Basin Landsat Image for June 23, 2006: Path 45 Rows 30 and 31
Daniel T. Snyder
2012, Report
This image is a mosaic of Landsat-5 images of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing...
Stable water isotopologue ratios in fog and cloud droplets of liquid clouds are not size-dependent
J.K. Spiegel, F. Aemisegger, M. Scholl, F.G. Wienhold, J.L. Collett Jr., T. Lee, D. van Pinxteren, S. Mertes, A. Tilgner, H. Herrmann, Roland A. Werner, N. Buchmann, W. Eugster
2012, Atmospheric Chemistry and Physics (12) 9855-9863
In this work, we present the first observations of stable water isotopologue ratios in cloud droplets of different sizes collected simultaneously. We address the question whether the isotope ratio of droplets in a liquid cloud varies as a function of droplet size. Samples were collected from a ground intercepted cloud...
Klamath Basin Restoration Agreement Off-Project Water Program Evapotranspiration Map for October 2006
Water Resources Division, U.S. Geological Survey
2012, Report
