Prediction and discovery of new geothermal resources in the Great Basin: Multiple evidence of a large undiscovered resource base
M.F. Coolbaugh, G. L. Raines, R. E. Zehner, L. Shevenell, C.F. Williams
2006, Conference Paper, Transactions - Geothermal Resources Council
Geothermal potential maps by themselves cannot directly be used to estimate undiscovered resources. To address the undiscovered resource base in the Great Basin, a new and relatively quantitative methodology is presented. The methodology involves three steps, the first being the construction of a data-driven probabilistic model of the location of...
Food habits of Juvenile American Shad and dynamics of zooplankton in the lower Columbia River
C. A. Haskell, K.F. Tiffan, D.W. Rondorf
2006, Northwest Science (80) 47-64
As many as 2.4 million adult American shad annually pass John Day Dam, Columbia River to spawn upriver, yet food web interactions of juvenile shad rearing in John Day Reservoir are unexplored. We collected zooplankton and conducted mid-water trawls in McNary (June-July) and John Day reservoirs (August-November) from 1994 through...
Composition of Titan's surface from Cassini VIMS
T. B. McCord, G. B. Hansen, B. J. Buratti, R. N. Clark, D. P. Cruikshank, E. D’Aversa, C.A. Griffith, E.K.H. Baines, R. H. Brown, Ore Dalle, G. Filacchione, V. Formisano, C. A. Hibbitts, R. Jaumann, J. I. Lunine, R.M. Nelson, Christophe Sotin
2006, Planetary and Space Science (54) 1524-1539
Titan's bulk density along with Solar System formation models indicates considerable water as well as silicates as its major constituents. This satellite's dense atmosphere of nitrogen with methane is unique. Deposits or even oceans of organic compounds have been suggested to exist on Titan's solid surface due to UV-induced photochemistry...
Examination of the watershed-wide distribution of Escherichia coli along southern Lake Michigan: An integrated approach
R.L. Whitman, M.B. Nevers, M.N. Byappanahalli
2006, Applied and Environmental Microbiology (72) 7301-7310
Recent research has highlighted the occurrence of Escherichia coli in natural habitats not directly influenced by sewage inputs. Most studies on E. coli in recreational water typically focus on discernible sources (e.g., effluent discharge and runoff) and fall short of integrating riparian, nearshore, onshore, and outfall sources. An integrated “beachshed” approach that links E. coli inputs...
Multiple constraints on the age of a Pleistocene lava dam across the Little Colorado River at Grand Falls, Arizona
W. Duffield, N. Riggs, D. Kaufman, D. Champion, C. Fenton, S. Forman, W. McIntosh, R. Hereford, J. Plescia, M. Ort
2006, Geological Society of America Bulletin (118) 421-429
The Grand Falls basalt lava flow in northern Arizona was emplaced in late Pleistocene time. It flowed 10 km from its vent area to the Little Colorado River, where it cascaded into and filled a 65-m-deep canyon to form the Grand Falls lava dam. Lava continued ???25 km downstream and...
A water-budget approach to restoring a sedge fen affected by diking and ditching
Douglas A. Wilcox, Michael J. Sweat, Martha L. Carlson, Kurt P. Kowalski
2006, Journal of Hydrology (320) 501-517
A vast, ground-water-supported sedge fen in the Upper Peninsula of Michigan, USA was ditched in the early 1900s in a failed attempt to promote agriculture. Dikes were later constructed to impound seasonal sheet surface flows for waterfowl management. The US Fish and Wildlife Service, which now manages the wetland as...
Influence of water flow on Neosho madtom (Noturus placidus) reproductive behavior
J.L. Bryan, M. L. Wildhaber, Douglas B. Noltie
2006, American Midland Naturalist (156) 305-318
The Neosho madtom is a small, short-lived catfish species endemic to gravel bars of the Neosho River in Kansas, Oklahoma and Missouri, U.S.A. It spawns during summer in nesting cavities excavated in gravel. Although the species has survived dam construction within the Neosho River basin, its declining numbers resulted in...
Large internal waves in Massachusetts Bay transport sediments offshore
B. Butman, P. S. Alexander, A. Scotti, R.C. Beardsley, S.P. Anderson
2006, Continental Shelf Research (26) 2029-2049
A field experiment was carried out in Massachusetts Bay in August 1998 to assess the role of large-amplitude internal waves (LIWs) in resuspending bottom sediments. The field experiment consisted of a four-element moored array extending from just west of Stellwagen Bank (90-m water depth) across Stellwagen Basin (85- and 50-m...
Survival of largemouth bass from populations infected with largemouth bass virus and subjected to simulated tournament conditions
H.L. Schramm Jr., J.G. Davis
2006, North American Journal of Fisheries Management (26) 826-832
Mortality was measured for largemouth bass Micropterus salmoides in simulated tournaments conducted at 26??C to determine whether an easily accomplished live-well management protocol reduced mortality. Treatment fish, which received the live-well management protocol, were held for 8 h in live wells at 23??C with water containing more than 5 mg...
Wetland environmental conditions associated with the risk of avian cholera outbreaks and the abundance of Pasteurella multocida
Julie A. Blanchong, Michael D. Samuel, Diana R. Goldberg, Daniel J. Shadduck, L. H. Creekmore
2006, Journal of Wildlife Management (70) 54-60
Avian cholera is a significant infectious disease affecting waterfowl across North America and occurs worldwide among various avian species. Despite the importance of this disease, little is known about the factors that cause avian cholera outbreaks and what management strategies might be used to reduce disease mortality. Previous studies indicated...
The rocks of Gusev Crater as viewed by the Mini-TES instrument
S. W. Ruff, P. R. Christensen, D.L. Blaney, W. H. Farrand, J. R. Johnson, J.R. Michalski, J.E. Moersch, S.P. Wright, S. W. Squyres
2006, Journal of Geophysical Research E: Planets (111)
The Miniature Thermal Emission Spectrometer (Mini-TES) on board the Mars Exploration Rover Spirit is part of a payload designed to investigate whether a lake once existed in Gusev Crater. Mini-TES has observed hundreds of rocks along the rover's traverse into the Columbia Hills, yielding information on their distribution, bulk mineralogy,...
Sexing Forster's Terns using morphometric measurements
J.D. Bluso, Joshua T. Ackerman, John Y. Takekawa, J.L. Yee
2006, Waterbirds (29) 512-517
Forester's Terns (Sterna forsteri), like most seabirds, are monomorphic and are difficult to sex without extensive behavioral observations or genetic sexing. We conducted the first morphological study and discriminant function analysis on Forster's Terns to develop a method to accurately identify their sex in the field. A sample of 84...
Predicted changes in subyearling fall Chinook salmon rearing and migratory habitat under two drawdown scenarios for John Day Reservoir, Columbia River
K.F. Tiffan, R.D. Garland, D.W. Rondorf
2006, North American Journal of Fisheries Management (26) 894-907
We evaluated the potential effects of two different drawdown scenarios on rearing and migration habitat of subyearling fall Chinook salmon Oncorhynchus tshawytscha in John Day Reservoir on the Columbia River. We compared habitats at normal operating pool elevation with habitats at drawdown to spillway crest elevation and drawdown to the...
Nesting habitat of the Tule Greater White-fronted Goose Anser albifrons elgasi
R.V. Densmore, Craig R. Ely, K.S. Bollinger, S. Kratzer, Mark S. Udevitz, D.J. Fehringer, T.C. Rothe
2006, Wildfowl (56) 37-51
This paper presents the first information on the availability and use of nesting habitat by the rare Tule Greater White-fronted Goose Anser albifrons elgasi. The breeding range was sampled by marking geese with radio transmitters on wintering and moulting areas, and tracking them to nest sites in Alaska. Nesting habitat...
Influence of potentially confounding factors on sea urchin porewater toxicity tests
R.S. Carr, J.M. Biedenbach, M. Nipper
2006, Archives of Environmental Contamination and Toxicology (51) 573-579
The influence of potentially confounding factors has been identified as a concern for interpreting sea urchin porewater toxicity test data. The results from >40 sediment-quality assessment surveys using early-life stages of the sea urchin Arbacia punctulata were compiled and examined to determine acceptable ranges of natural variables such as pH,...
Parameterization and simulation of near bed orbital velocities under irregular waves in shallow water
B. Elfrink, D.M. Hanes, B.G. Ruessink
2006, Coastal Engineering (53) 915-927
A set of empirical formulations is derived that describe important wave properties in shallow water as functions of commonly used parameters such as wave height, wave period, local water depth and local bed slope. These wave properties include time varying near-bed orbital velocities and statistical properties such as the distribution...
Genetic variation among subspecies of Least Tern (Sterna antillarum): Implications for conservation
Joanna B. Whittier, David M. Leslie Jr., Ronald A. Van Den Bussche
2006, Waterbirds (29) 176-184
DNA sequence variation from two nuclear introns and part of the mitochondrial cytochrome-b gene were used to Evaluate population structure among three subspecies of Least Term that nest in the United States (California [Sterna antillarum browni], Interior [S. a. athalassos], Eastern [S. a. antillarum]). Sequence variation was highest for nuclear...
Pigs on the plains: Institutional analysis of a Colorado water quality initiative
D. King, N. Burkardt, Lamb B. Lee
2006, International Journal of Public Administration (29) 1411-1430
We used the Legal-Institutional Analysis Model (LIAM) and Advocacy Coalition Framework (ACF) to analyze the campaign over passage of the Colorado Hogs Rule, an initiative passed by the voters in 1998 to require regulation of swine production facilities in Colorado. Used in tandem, LIAM and ACF provided an opportunity to...
Testing the concept of drift shadow at Yucca Mountain, Nevada
J.B. Paces, L.A. Neymark, T. Ghezzehei, P.F. Dobson
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
If proven, the concept of drift shadow, a zone of reduced water content and slower ground-water travel time beneath openings in fractured rock of the unsaturated zone, may increase performance of a proposed geologic repository for high-level radioactive waste at Yucca Mountain, To test this concept under natural-flow conditions present...
Variables influencing the presence of subyearling fall Chinook salmon in shoreline habitats of the Hanford Reach, Columbia River
K.F. Tiffan, L.O. Clark, R.D. Garland, D.W. Rondorf
2006, North American Journal of Fisheries Management (26) 351-360
Little information currently exists on habitat use by subyearling fall Chinook salmon Oncorhynchus tshawytscha rearing in large, main-stem habitats. We collected habitat use information on subyearlings in the Hanford Reach of the Columbia River during May 1994 and April-May 1995 using point abundance electrofishing. We analyzed measures of physical habitat...
Uranium distribution in the coastal waters and pore waters of Tampa Bay, Florida
P.W. Swarzenski, M. Baskaran
2006, Marine Chemistry (102) 252-266
The geochemical reactivity of uranium (238U) and dissolved organic carbon (DOC), Fe, Mn, Ba, and V was investigated in the water column, pore waters, and across a river/estuarine mixing zone in Tampa Bay, Florida. This large estuary is impacted both by diverse anthropogenic activity and by extensive U-rich phosphatic deposits....
Atmospheric chemistry of a 33-34 hour old volcanic cloud from Hekla Volcano (Iceland): Insights from direct sampling and the application of chemical box modeling
William I. Rose Jr., G.A. Millard, T.A. Mather, D.E. Hunton, B. Anderson, C. Oppenheimer, B.F. Thornton, T.M. Gerlach, A.A. Viggiano, Y. Kondo, T.M. Miller, J.O. Ballenthin
2006, Journal of Geophysical Research D: Atmospheres (111)
On 28 February 2000, a volcanic cloud from Hekla volcano, Iceland, was serendipitously sampled by a DC-8 research aircraft during the SAGE III Ozone Loss and Validation Experiment (SOLVE I). It was encountered at night at 10.4 km above sea level (in the lower stratosphere) and 33-34 hours after emission....
Soluble reactive phosphorus transport and retention in tropical, rainforest streams draining a volcanic and geothermally active landscape in Costa Rica.: Long-term concentration patterns, pore water environment and response to ENSO events
F.J. Triska, C. M. Pringle, J.H. Duff, R.J. Avanzino, A. Ramirez, M. Ardon, A. P. Jackman
2006, Biogeochemistry (81) 131-143
Soluble reactive phosphorus (SRP) transport/retention was determined at four sites in three rainforest streams draining La Selva Biological Station, Costa Rica. La Selva is located at the base of the last remaining intact rainforest transect from 30 m above sea level to 3000 m along the entire Caribbean slope of...
Alternate corrections for estimating actual wetland evapotranspiration from potential evapotranspiration
W. Barclay Shoemaker, D. M. Sumner
2006, Wetlands (26) 528-543
Corrections can be used to estimate actual wetland evapotranspiration (AET) from potential evapotranspiration (PET) as a means to define the hydrology of wetland areas. Many alternate parameterizations for correction coefficients for three PET equations are presented, covering a wide range of possible data-availability scenarios. At nine sites in the wetland...
A simple method of predicting S-wave velocity
Myung W. Lee
2006, Geophysics (71)
Prediction of shear-wave velocity plays an important role in seismic modeling, amplitude analysis with offset, and other exploration applications. This paper presents a method for predicting S-wave velocity from the P-wave velocity on the basis of the moduli of dry rock. Elastic velocities of water-saturated sediments at low frequencies can...
