Mapping irrigated lands at 250-m scale by merging MODIS data and National Agricultural Statistics
Md Shahriar Pervez, Jesslyn F. Brown
2010, Remote Sensing (2) 2388-2412
Accurate geospatial information on the extent of irrigated land improves our understanding of agricultural water use, local land surface processes, conservation or depletion of water resources, and components of the hydrologic budget. We have developed a method in a geospatial modeling framework that assimilates irrigation statistics with remotely sensed parameters...
The thermal regime in the resurgent dome of Long Valley Caldera, California: Inferences from precision temperature logs in deep wells
S. Hurwitz, C. D. Farrar, C.F. Williams
2010, Journal of Volcanology and Geothermal Research (198) 233-240
Long Valley Caldera in eastern California formed 0.76Ma ago in a cataclysmic eruption that resulted in the deposition of 600km3 of Bishop Tuff. The total current heat flow from the caldera floor is estimated to be ~290MW, and a geothermal power plant in Casa Diablo on the flanks of the...
Probabilistic seismic hazard estimates incorporating site effects - An example from Indiana, U.S.A
J.S. Hasse, C.H. Park, R.L. Nowack, J.R. Hill
2010, Environmental & Engineering Geoscience (16) 369-388
The U.S. Geological Survey (USGS) has published probabilistic earthquake hazard maps for the United States based on current knowledge of past earthquake activity and geological constraints on earthquake potential. These maps for the central and eastern United States assume standard site conditions with Swave velocities of 760 m/s in the...
Shallow magma accumulation at Kīlauea Volcano, Hawai‘i, revealed by microgravity surveys
Daniel J. Johnson, Albert A. Eggers, Marco Bagnardi, Maurizio Battaglia, Michael P. Poland, Asta Miklius
2010, Geology (38) 1139-1142
Using microgravity data collected at Kīlauea Volcano, Hawai‘i (United States), between November 1975 and January 2008, we document significant mass increase beneath the east margin of Halema‘uma‘u Crater, within Kīlauea's summit caldera. Surprisingly, there was no sustained uplift accompanying the mass accumulation. We propose that the positive gravity residual in...
Sedimentary basins reconnaissance using the magnetic Tilt-Depth method
A. Salem, S. Williams, E. Samson, D. Fairhead, D. Ravat, R.J. Blakely
2010, Exploration Geophysics (41) 198-209
We compute the depth to the top of magnetic basement using the Tilt-Depth method from the best available magnetic anomaly grids covering the continental USA and Australia. For the USA, the Tilt-Depth estimates were compared with sediment thicknesses based on drilling data and show a correlation of 0.86 between the...
Landscape characteristics affecting streams in urbanizing regions of the Delaware River Basin (New Jersey, New York, and Pennsylvania, U.S.)
K. Riva-Murray, R. Riemann, P. Murdoch, J.M. Fischer, R. Brightbill
2010, Landscape Ecology (25) 1489-1503
Widespread and increasing urbanization has resulted in the need to assess, monitor, and understand its effects on stream water quality. Identifying relations between stream ecological condition and urban intensity indicators such as impervious surface provides important, but insufficient information to effectively address planning and management needs in such areas. In...
Effects of exploitation on black bear populations at White River National Wildlife Refuge
J. D. Clark, R. Eastridge, M.J. Hooker
2010, Journal of Wildlife Management (74) 1448-1456
We live-trapped American black bears (Ursus americanus) and sampled DNA from hair at White River National Wildlife Refuge, Arkansas, USA, to estimate annual population size (N), growth (λ), and density. We estimated N and λ with open population models, based on live-trapping data collected from 1998 through 2006, and robust...
Caution on the use of liquid nitrogen traps in stable hydrogen isotope-ratio mass spectrometry
Tyler B. Coplen, Haiping Qi
2010, Analytical Chemistry (82) 7849-7851
An anomalous stable hydrogen isotopic fractionation of 4 ‰ in gaseous hydrogen has been correlated with the process of adding liquid nitrogen (LN2) to top off the dewar of a stainless-steel water trap on a gaseous hydrogen-water platinum equilibration system. Although the cause of this isotopic fractionation is unknown, its...
Studies from the history of soil science and geology
Edward R. Landa, Benjamin R. Cohen
2010, Physics and Chemistry of the Earth, Parts A/B/C (35) 849-850
The United Nations proclaimed the year 2008 as the official International Year of Planet Earth (IYPE), with science and outreach activities spanning 2007–2009. IYPE-sponsored outreach helped focus the attention of the general public on topics such as human health and the environment; ocean and natural resources sustainability; mitigating natural hazards...
A review of the genus Agapetus Curtis (Trichoptera: Glossosomatidae) in eastern and central North America, with description of 12 new species
David A. Etnier, Charles R. Parker, John T. Baxter Jr., Todd M. Long
2010, Insecta Mundi (149)
Twenty-nine species of caddisflies in the genus Agapetus Curtis in eastern and central North America are reviewed. Twelve are described as new species: Agapetus aphallus (known only from females); Agapetus baueri, Agapetus flinti, Agapetus harrisi, Agapetus hesperus, Agapetus ibis, Agapetus kirchneri, Agapetus meridionalis, Agapetus pegram, Agapetus ruiteri, Agapetus stylifer, and...
Some notes on the geology of Cave Mountain Cave, Pendleton County, West Virginia
C.S. Swezey, F.T. Dulong
2010, The West Virginia Caver (28) 5-10
Mineralogical and chemical characteristics of some natural jarosites
George A. Desborough, Kathleen S. Smith, Heather A. Lowers, Gregg A. Swayze, Jane M. Hammarstrom, Sharon F. Diehl, Reinhard W. Leinz, Rhonda L. Driscoll
2010, Geochimica et Cosmochimica Acta (74) 1041-1056
This paper presents a detailed study of the mineralogical, microscopic, thermal, and spectral characteristics of jarosite and natrojarosite minerals. Systematic mineralogic and chemical examination of a suite of 32 natural stoichiometric jarosite and natrojarosite samples from diverse supergene and hydrothermal environments indicates that there is only limited solid solution between...
Interpreting canopy water balance and fog screen observations: separating cloud water from wind-blown rainfall at two contrasting forest sites in Hawai'i
Thomas W. Giambelluca, J. K. DeLay, M.A. Nullet, Martha A. Scholl, Stephen B. Gingerich
L.A. Bruijnzeel, F.N. Scatena, L.S. Hamilton, editor(s)
2010, Book chapter, Tropical montane cloud forests: science for conservation and management
No abstract available....
Rift-related volcanism and karst geohydrology of the southern Ozark Dome
Richard W. Harrison, David J. Weary, Randall C. Orndorff, John E. Repetski, Herbert A. Pierce, Gary R. Lowell
Kevin R. Evans, James S. Aber, editor(s)
2010, Book chapter, From Precambrian rift volcanoes to the Mississippian Shelf margin: Geological field excursions in the Ozark Mountains
This field trip examines the geology and geohydrology of a dissected part of the Salem Plateau in the Ozark Plateaus province of south-central Missouri. Rocks exposed in this area include karstified, flat-lying, lower Paleozoic carbonate platform rocks deposited on Mesoproterozoic basement. The latter is exposed as an uplift located about...
Three-dimensional benchmark for variable-density flow and transport simulation: matching semi-analytic stability modes for steady unstable convection in an inclined porous box
Clifford I. Voss, Craig T. Simmons, Neville I. Robinson
2010, Hydrogeology Journal (18) 5-23
This benchmark for three-dimensional (3D) numerical simulators of variable-density groundwater flow and solute or energy transport consists of matching simulation results with the semi-analytical solution for the transition from one steady-state convective mode to another in a porous box. Previous experimental and analytical studies of natural convective flow in an...
Book review: Hollowed ground—Copper mining and community building on Lake Superior, 1840s–1990s
Klaus J. Schulz
2010, Economic Geology (105) 1351-1354
In 1843, six years before the Forty-niners headed west for the goldfields of California, the United States’ first great mineral rush began to a land that was, as Patrick Henry told Congress, “beyond the most distant wilderness and remote as the moon.” He was referring to the Keweenaw Peninsula of...
Geophysical framework of the northern San Francisco Bay region, California
Victoria E. Langenheim, Russell W. Graymer, Robert C. Jachens, Robert J. McLaughlin, D.L. Wagner, Donald S. Sweetkind
2010, Geosphere (6) 594-620
We use geophysical data to examine the structural framework of the northern San Francisco Bay region, an area that hosts the northward continuation of the East Bay fault system. Although this fault system has accommodated ∼175 km of right-lateral offset since 12 Ma, how this offset is partitioned north of...
Coupled hydrology and biogeochemistry of Paleocene–Eocene coal beds, northern Gulf of Mexico
Jennifer C. McIntosh, Peter D. Warwick, Anna M. Martini, Stephen G. Osborn
2010, GSA Bulletin (122) 1248-1264
Thirty-six formation waters, gas, and microbial samples were collected and analyzed from natural gas and oil wells producing from the Paleocene to Eocene Wilcox Group coal beds and adjacent sandstones in north-central Louisiana, USA, to investigate the role hydrology plays on the generation and distribution of microbial methane. Major ion...
Marine electrical resistivity imaging of submarine groundwater discharge: Sensitivity analysis and application in Waquoit Bay, Massachusetts, USA
Rory Henderson, Frederick D. Day-Lewis, Elena Abarca, Charles F. Harvey, Hanan N. Karam, Lanbo Liu, John W. Lane Jr.
2010, Hydrogeology Journal (18) 173-185
Electrical resistivity imaging has been used in coastal settings to characterize fresh submarine groundwater discharge and the position of the freshwater/salt-water interface because of the relation of bulk electrical conductivity to pore-fluid conductivity, which in turn is a function of salinity. Interpretation of tomograms for hydrologic processes is complicated by...
Geologic controls on thermal maturity patterns in Pennsylvanian coal-bearing rocks in the Appalachian basin
Leslie F. Ruppert, James C. Hower, Robert T. Ryder, Jeffrey R. Levine, Michael H. Trippi, William C. Grady
2010, International Journal of Coal Geology (81) 169-181
Thermal maturation patterns of Pennsylvanian strata in the Appalachian basin were determined by compiling and contouring published and unpublished vitrinite reflectance (VR) measurements. VR isograd values range from 0.6% in eastern Ohio and eastern Kentucky (western side of the East Kentucky coal field) to greater than 5.5% in eastern Pennsylvania (Southern Anthracite field,...
Predictive modeling of transient storage and nutrient uptake: Implications for stream restoration
Ben L. O’Connor, Miki Hondzo, Judson W. Harvey
2010, Journal of Hydraulic Engineering (136) 1018-1032
This study examined two key aspects of reactive transport modeling for stream restoration purposes: the accuracy of the nutrient spiraling and transient storage models for quantifying reach-scale nutrient uptake, and the ability to quantify transport parameters using measurements and scaling techniques in order to improve upon traditional conservative tracer fitting...
Transient electromagnetic mapping of clay units in the San Luis Valley, Colorado
David V. Fitterman, V. J. S. Grauch
2010, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010
Transient electromagnetic soundings were used to obtain information needed to refine hydrologic models of the San Luis Valley, Colorado. The soundings were able to map an aquitard called the blue clay that separates an unconfined surface aquifer from a deeper confined aquifer. The blue clay forms a conductor with an average...
Brine delineation and monitoring with electrical resistivity tomography and electromagnetic borehole logging at the Fort Knox well field near West Point, Kentucky
Rory Henderson, Michael D. Unthank, Douglas D. Zettwoch, John W. Lane Jr.
2010, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010
The potable water system at Fort Knox is threatened by brine contamination from improperly abandoned natural gas exploration wells. The Fort Knox well field is located near the town of West Point, Kentucky, in the flood plain of the Ohio River. At the site, unconsolidated sediments approximately 30 – 40...
Geometry and kinematics of the eastern Lake Mead fault system in the Virgin Mountains, Nevada and Arizona
Sue Beard, David J. Campagna, R. Ernest Anderson
2010, GSA Special Papers (463) 243-274
The Lake Mead fault system is a northeast-striking, 130-km-long zone of left-slip in the southeast Great Basin, active from before 16 Ma to Quaternary time. The northeast end of the Lake Mead fault system in the Virgin Mountains of southeast Nevada and northwest Arizona forms a...
Maintenance of Eastern hemlock forests: Factors associated with hemlock vulnerability to hemlock woolly adelgid
Mary Ann Fajvan, Petra Bohall Wood
2010, Conference Paper, Proceedings from the Conference on the Ecology and Management of High-Elevation Forests in the Central and Southern Appalachian Mountains
Eastern hemlock (Tsuga canadensis [L.]) is the most shade-tolerant and long-lived tree species in eastern North America. The hemlock woolly adelgid (Adelges tsugae) (HWA), is a nonnative invasive insect that feeds on eastern hemlock and Carolina hemlock (Tsuga caroliniana Engelm.). HWA currently is established in 17 eastern states and is...
