Geotechnical aspects of the January 2003 Tecoma'n, Mexico, earthquake
Joseph Wartman, Adrian Rodriguez-Marek, Emir J. Macari, Scott Deaton, Marti’n Ramirez-Reynaga, Carlos N. Ochoa, Sean Callan, David Keefer, Pedro Repetto, Efrai’n Ovando-Shelley
2005, Earthquake Spectra (21) 493-538
Ground failure was the most prominent geotechnical engineering feature of the 21 January 2003 Mw 7.6 Tecoma´n earthquake. Ground failure impacted structures, industrial facilities, roads, water supply canals, and other critical infrastructure in the state of Colima and in parts of the neighboring states of Jalisco and Michoaca´n. Landslides and soil...
Modeling duckweed growth in wastewater treatment systems
L. Landesman, N. C. Parker, C.B. Fedler, M. Konikoff
2005, Livestock Research for Rural Development (17)
Species of the genera Lemnaceae, or duckweeds, are floating aquatic plants that show great promise for both wastewater treatment and livestock feed production. Research conducted in the Southern High Plains of Texas has shown that Lemna obscura grew well in cattle feedlot runoff water and produced leaf tissue with a...
Testing for evidence of maternal effects among individuals and populations of white crappie
D.B. Bunnell, M.A. Scantland, R.A. Stein
2005, Transactions of the American Fisheries Society (134) 607-619
For an increasing number of species, maternal characteristics have been correlated with the characteristics of their eggs or larvae at the individual level. Documenting these maternal effects at the population level, however, is uncommon. For white crappies Pomoxis annularis, we evaluated whether individual maternal effects on eggs existed and then...
Geologic controls of subdivision damage near Denver, Colorado
D.C. Noe
2005, Journal of Geotechnical and Geoenvironmental Engineering (131) 1080-1096
This case study investigates the geologic controls on damaging ground deformations in a residential subdivision near Denver, Colo. Moderate to severe damage has occurred in certain areas where linear, parallel heave features with up to 0.3 in (1 ft) of differential displacement have formed across roads and under houses. Other...
Unraveling the effects of sex and dispersal: Ozark big-eared bat (Corynorhinus townsendii ingens) conservation genetics
S.E. Weyandt, Ronald A. Van Den Bussche, M.J. Hamilton, David M. Leslie Jr.
2005, Journal of Mammalogy (86) 1136-1143
The Ozark big-eared bat (Corynorhinus townsendii ingens) is federally listed as endangered and is found in only a small number of caves in eastern Oklahoma and northwestern Arkansas. Previous studies suggested site fidelity of females to maternity caves; however, males are solitary most of the year, and thus specific information...
Source process of a long-period event at Kilauea volcano, Hawaii
Hiroyuki Kumagai, B. A. Chouet, P.B. Dawson
2005, Geophysical Journal International (161) 243-254
We analyse a long-period (LP) event observed by a dense seismic network temporarily operated at Kilauea volcano, Hawaii, in 1996. We systematically perform spectral analyses, waveform inversions and forward modeling of the LP event to quantify its source process. Spectral analyses identify two dominant spectral frequencies at 0.6 and 1.3...
Groundwater depletion: A global problem
Leonard F. Konikow, E. Kendy
2005, Hydrogeology Journal (13) 317-320
No abstract available....
Wash load and bed-material load transport in the Yellow River
C.T. Yang, F.J.M. Simoes
2005, Journal of Hydraulic Engineering (131) 413-418
It has been the conventional assumption that wash load is supply limited and is only indirectly related to the hydraulics of a river. Hydraulic engineers also assumed that bed-material load concentration is independent of wash load concentration. This paper provides a detailed analysis of the Yellow River sediment transport data...
Seismic joint analysis for non-destructive testing of asphalt and concrete slabs
N. Ryden, C.B. Park
2005, Conference Paper, Geotechnical Special Publication
A seismic approach is used to estimate the thickness and elastic stiffness constants of asphalt or concrete slabs. The overall concept of the approach utilizes the robustness of the multichannel seismic method. A multichannel-equivalent data set is compiled from multiple time series recorded from multiple hammer impacts at progressively different...
Euthanasia of neonatal mice with carbon dioxide
K. Pritchett, D. Corrow, J. Stockwell, A. Smith
2005, Comparative Medicine (55) 275-281
Exposure to carbon dioxide (CO2) is the most prevalent method used to euthanize rodents in biomedical research. The purpose of this study was to determine the time of CO2 exposure required to euthanize neonatal mice (0 to 10 days old). Multiple groups of mice were exposed to 100% CO 2...
Sources of variability of evapotranspiration in California
H.G. Hidalgo, D.R. Cayan, M. D. Dettinger
2005, Journal of Hydrometeorology (6) 3-19
The variability (1990–2002) of potential evapotranspiration estimates (ETo) and related meteorological variables from a set of stations from the California Irrigation Management System (CIMIS) is studied. Data from the National Climatic Data Center (NCDC) and from the Department of Energy from 1950 to 2001 were used to...
Total mercury concentrations in fillets of bluegill, redear sunfish, largemouth bass, and other fishes from Lake Natoma, Sacramento County, California
M. K. Saiki, B.A. Martin, T.W. May, Charles N. Alpers
2005, California Fish and Game (91) 193-206
This study was conducted during September-October 2002 to verify preliminary findings of elevated total mercury concentrations in skinless fillets of sportfishes inhabiting Lake Natoma. Although we measured total mercury concentrations, most mercury in fish flesh occurs in the methylated form. In August 2000, other investigators collected a small number of...
Dating offset fans along the Mojave section of the San Andreas fault using cosmogenic 26Al and 10Be
A. Matmon, David P. Schwartz, R. Finkel, S. Clemmens, T. Hanks
2005, Geological Society of America Bulletin (117) 795-807
Analysis of cosmogenic 10Be and 26Al in samples collected from exposed boulders (n = 20) and from buried sediment (n = 3) from offset fans along the San Andreas fault near Little Rock, California, yielded ages, ranging from 16 to 413 ka, which increase with distance from their source at...
Variability in vegetation effects on density and nesting success of grassland birds
Maiken Winter, Douglas H. Johnson, Jill A. Shaffer
2005, Journal of Wildlife Management (69) 185-197
The structure of vegetation in grassland systems, unlike that in forest systems, varies dramatically among years on the same sites, and among regions with similar vegetation. The role of this variation in vegetation structure on bird density and nesting success of grassland birds is poorly understood, primarily because few studies...
Paleoproterozoic high-sulfidation mineralization in the Tapajós gold province, Amazonian Craton, Brazil: geology, mineralogy, alunite argon age, and stable-isotope constraints
Caetano Juliani, Robert O. Rye, Carmen Nunes, Lawrence W. Snee, Rafael H. Correa, Lena V.S. Monteiro, Jorge S. Bettencourt, Rainer Neumann, Arnaldo A. Neto
2005, Chemical Geology (215) 95-125
The Brazilian Tapajós gold province contains the first evidence of high-sulfidation gold mineralization in the Amazonian Craton. The mineralization appears to be in large nested calderas. The Tapajós–Parima (or Ventuari–Tapajós) geological province consists of a metamorphic, igneous, and sedimentary sequence formed during a 2.10 to 1.87 Ga ocean−continent orogeny. The...
Temporal variations and scaling of streamflow and baseflow and their nitrate-nitrogen concentrations and loads
Y.-K. Zhang, K. Schilling
2005, Advances in Water Resources (28) 701-710
The patterns of temporal variations of precipitation (P), streamflow (SF) and baseflow (BF) as well as their nitrate-nitrogen (nitrate) concentrations (C) and loads (L) from a long-term record (28 years) in the Raccoon River, Iowa, were analyzed using variogram and spectral analyses. The daily P is random but scaling may...
Development of evaluation tools for GIS: How does GIS affect student learning?
S. Linn, J. Kerski, S. Wither
2005, International Research in Geographical and Environmental Education (14) 217-222
No abstract available....
Perchlorate isotope forensics
J.K. Böhlke, N.C. Sturchio, B. Gu, J. Horita, G.M. Brown, W.A. Jackson, J. Batista, P.B. Hatzinger
2005, Analytical Chemistry (77) 7838-7842
Perchlorate has been detected recently in a variety of soils, waters, plants, and food products at levels that may be detrimental to human health. These discoveries have generated considerable interest in perchlorate source identification. In this study, comprehensive stable isotope analyses (37Cl/35Cl and 18O/17O/16O) of perchlorate from known synthetic and natural...
Influence of topographic complexity on solar insolation estimates for the Colorado River, Grand Canyon, AZ
M.D. Yard, G.E. Bennett, S.N. Mietz, L.G. Coggins Jr., L.E. Stevens, S. Hueftle, D.W. Blinn
2005, Ecological Modelling (183) 157-172
Rugged topography along the Colorado River in Glen and Grand Canyons, exemplifies features common to canyon-bound streams and rivers of the arid southwest. Physical relief influences regulated river systems, especially those that are altered, and have become partially reliant on aquatic primary production. We measured and modeled instantaneous solar flux...
Transboundary impacts on regional ground water modeling in Texas
K. Rainwater, J. Stovall, S. Frailey, L. Urban
2005, Conference Paper, Ground Water
Recent legislation required regional grassroots water resources planning across the entire state of Texas. The Texas Water Development Board (TWDB), the state's primary water resource planning agency, divided the state into 16 planning regions. Each planning group developed plans to manage both ground water and surface water sources and to...
Forest cover influences dispersal distance of white-tailed deer
E.S. Long, Duane R. Diefenbach, C.S. Rosenberry, B.D. Wallingford, M.D. Grund
2005, Journal of Mammalogy (86) 623-629
Animal dispersal patterns influence gene flow, disease spread, population dynamics, spread of invasive species, and establishment of rare or endangered species. Although differences in dispersal distances among taxa have been reported, few studies have described plasticity of dispersal distance among populations of a single species. In 2002-2003, we radiomarked 308...
Nitrogen controls on ecosystem carbon sequestration: a model implementation and application to Saskatchewan, Canada
J. Liu, D.T. Price, J.M. Chen
2005, Ecological Modelling (186) 178-195
A plant–soil nitrogen (N) cycling model was developed and incorporated into the Integrated BIosphere Simulator (IBIS) of Foley et al. [Foley, J.A., Prentice, I.C., Ramankutty, N., Levis, S., Pollard, D., Sitch, S., Haxeltine, A., 1996. An integrated biosphere model of land surface process, terrestrial carbon balance and vegetation dynamics. Global...
An exploratory assessment of Cuban Treefrog (Osteopilus septentrionalis) tadpoles as predators of native and nonindigenous tadpoles in Florida
Kimberly G. Smith
2005, Amphibia-Reptilia (26) 571-575
[No abstract available]...
Functional groups of fossil marattialeans: Chemotaxonomic implications for Pennsylvanian tree ferns and pteridophylls
J. Psenicka, E.L. Zodrow, Maria Mastalerz, J. Bek
2005, International Journal of Coal Geology (61) 259-280
Marattialean-fossil foliage, assigned to Pecopteris Brongniart, was an important and widespread floral component in Late Pennsylvanian mires, with phylogenetic affinity to extant marattialean taxa in tropical regions. Marattialean fossil taxonomy is, however, still uncertain. Specimens from the Pilsen limnic Basin, Westphalian D, Czech Republic, represent fertile marattialean foliage of Pecopteris...
Mercury burdens in Chinese mitten crabs (Eriocheir sinensis) in three tributaries of southern San Francisco Bay, California, USA
C. A. Hui, D. Rudnick, E. Williams
2005, Environmental Pollution (133) 481-487
Chinese mitten crabs (Eriocheir sinensis), endemic to Asia, were first reported in the San Francisco Bay in 1992. They are now established in nearly all San Francisco Bay tributaries. These crabs accumulate more metals, such as mercury, than crustaceans living in the water column. Because their predators include fish, birds,...
