Flow resistance in open channels with fixed movable bed
Francisco J. Simoes
2010, Conference Paper, 2nd Joint Federal Interagency Conference, Las Vegas, NV, June 27 - July 1, 2010
In spite of an increasingly large body of research by many investigators, accurate quantitative prediction of open channel flow resistance remains a challenge. In general, the relations between the elements influencing resistance (turbulence, boundary roughness, and channel shape features, such as discrete obstacles, bars, channel curvature, recirculation areas, secondary circulation,...
Hawaiian Islands: invasions
L. Loope
D. Simberloff, M. Rejmanek, editor(s)
2010, Book chapter, Encyclopedia of invasive introduced species
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...
Effects of 3D random correlated velocity perturbations on predicted ground motions
S. Hartzell, S. Harmsen, A. Frankel
2010, Bulletin of the Seismological Society of America (100) 1415-1426
Three-dimensional, finite-difference simulations of a realistic finite-fault rupture on the southern Hayward fault are used to evaluate the effects of random, correlated velocity perturbations on predicted ground motions. Velocity perturbations are added to a three-dimensional (3D) regional seismic velocity model of the San Francisco Bay Area using a 3D von...
F is for fuller's earth
W. H. Langer
2010, Aggregates Manager (15) 40-40
Before putting on a wool cardigan, make sure you know how the wool was cleaned....
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Average Atmospheric (Wet) Deposition of Inorganic Nitrogen, 2002
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-02
This tabular data set represents the average atmospheric (wet) deposition, in kilograms per square kilometer, of inorganic nitrogen for the year 2002 compiled for every catchment for MRB_E2RF1 of Major River Basins (MRBs, Crawford and others, 2006). The source data set for wet deposition was from the USGS's raster data...
G is for gnome
W. H. Langer
2010, Aggregates Manager (15) 146-146
Possibly based on miners from Southeast Germany, ceramic gnomes feature the pointed red hat often worn by these miners....
E is for earth
W. H. Langer
2010, Aggregates Manager (15) 40-40
The planet's layers - particularly the earth's crust - provide many of life's essential building blocks....
Inter-comparison of hydro-climatic regimes across northern catchments: Synchronicity, resistance and resilience
S.K. Carey, D. Tetzlaff, J. Seibert, C. Soulsby, J. Buttle, H. Laudon, J. McDonnell, K. McGuire, D. Caissie, J. Shanley, M. Kennedy, K. Devito, J.W. Pomeroy
2010, Hydrological Processes (24) 3591-3602
The higher mid-latitudes of the Northern Hemisphere are particularly sensitive to climate change as small differences in temperature determine frozen ground status, precipitation phase, and the magnitude and timing of snow accumulation and melt. An international inter-catchment comparison program, North-Watch, seeks to improve our understanding of the sensitivity of northern...
The vegetation outlook (VegOut): a new method for predicting vegetation seasonal greenness
T. Tadesse, B. Wardlow, M. Hayes, M. Svoboda, J. Brown
2010, GIScience and Remote Sensing (47) 25-52
The vegetation outlook (VegOut) is a geospatial tool for predicting general vegetation condition patterns across large areas. VegOut predicts a standardized seasonal greenness (SSG) measure, which represents a general indicator of relative vegetation health. VegOut predicts SSG values at multiple time steps (two to six weeks into the future) based...
Effects of lipid extraction on stable isotope ratios in avian egg yolk: Is arithmetic correction a reliable alternative?
S. Oppel, R.N. Federer, D. M. O’Brien, A.N. Powell, Tuula E. Hollmén
2010, The Auk (127) 72-78
Many studies of nutrient allocation to egg production in birds use stable isotope ratios of egg yolk to identify the origin of nutrients. Dry egg yolk contains >50% lipids, which are known to be depleted in 13C. Currently, researchers remove lipids from egg yolk using a chemical lipid-extraction procedure before...
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Basin Characteristics, 2002 Geospatial_Data_Presentation_Form: tabular digital data
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-03
This tabular data set represents basin characteristics for the year 2002 compiled for every MRB_E2RF1 catchment of selected Major River Basins (MRBs, Crawford and others, 2006). These characteristics are reach catchment shape index, stream density, sinuosity, mean elevation, mean slope and number of road-stream crossings. The source data...
Evaluating propagation method performance over time with Bayesian updating: An application to incubator testing
Sarah J. Converse, J. N. Chandler, Glenn H. Olsen, C. C. Shafer
Barry K. Hartup, Richard P. Urbanek, editor(s)
2010, Book chapter, Proceedings of the Eleventh North American Crane Workshop
In captive-rearing programs, small sample sizes can limit the quality of information on performance of propagation methods. Bayesian updating can be used to increase information on method performance over time. We demonstrate an application to incubator testing at USGS Patuxent Wildlife Research Center. A new type of incubator was purchased...
An 11 000-year-long record of fire and vegetation history at Beaver Lake, Oregon, central Willamette Valley
Megan K. Walsh, Christopher A. Pearl, Cathy Whitlock, Patrick J. Bartlein, Marc A. Worona
2010, Quaternary Science Reviews (29) 1093-1106
High-resolution macroscopic charcoal and pollen analysis were used to reconstruct an 11??000-year-long record of fire and vegetation history from Beaver Lake, Oregon, the first complete Holocene paleoecological record from the floor of the Willamette Valley. In the early Holocene (ca 11??000-7500 calendar years before present [cal??yr??BP]), warmer, drier summers than...
The anatomy of a (potential) disaster: Volcanoes, behavior, and population viability of the short-tailed albatross (Phoebastria albatrus)
M.E. Finkelstein, S. Wolf, M. Goldman, D.F. Doak, P.R. Sievert, G. Balogh, H. Hasegawa
2010, Biological Conservation (143) 321-331
Catastrophic events, either from natural (e.g., hurricane) or human-induced (e.g., forest clear-cut) processes, are a well-known threat to wild populations. However, our lack of knowledge about population-level effects of catastrophic events has inhibited the careful examination of how catastrophes affect population growth and persistence. For the critically endangered short-tailed albatross...
D is for diamond
W. H. Langer
2010, Aggregates Manager (15) 40-40
Real diamonds are a girl's best friend, but synthetic ones opened up a whole new world for granite....
C is for cactolith
W. H. Langer
2010, Aggregates Manager (15) 44-44
Geologic jargon - though handy for triple-word scores - should be used in moderation....
Hurricane storm surge and amphibian communities in coastal wetlands of northwestern Florida
Margaret S. Gunzburger, William B. Hughes, William J. Barichivich, Jennifer S. Staiger
2010, Wetlands Ecology and Management (18) 651-663
Isolated wetlands in the Southeastern United States are dynamic habitats subject to fluctuating environmental conditions. Wetlands located near marine environments are subject to alterations in water chemistry due to storm surge during hurricanes. The objective of our study was to evaluate the effect of storm surge overwash on wetland amphibian...
B is for blinding
W. H. Langer
2010, Aggregates Manager (15) 48-48
An enterprising operator finds a solution to a geologic problem that had been in the making for 1.4 million years....
The Middle Jurassic basinal deposits of the Surmeh Formation in the Central Zagros Mountains, southwest Iran: Facies, sequence stratigraphy, and controls
Y. Lasemi, A.H. Jalilian
2010, Carbonates and Evaporites (25) 283-295
The lower part of the Lower to Upper Jurassic Surmeh Formation consists of a succession of shallow marine carbonates (Toarcian-Aalenian) overlain by a deep marine basinal succession (Aalenian-Bajocian) that grades upward to Middle to Upper Jurassic platform carbonates. The termination of shallow marine carbonate deposition of the lower part of...
A is for aggregate
W. H. Langer
2010, Aggregates Manager (15) 52-52
A geostatistical approach to mapping site response spectral amplifications
E.M. Thompson, L.G. Baise, R. E. Kayen, Y. Tanaka, H. Tanaka
2010, Engineering Geology (114) 330-342
If quantitative estimates of the seismic properties do not exist at a location of interest then the site response spectral amplifications must be estimated from data collected at other locations. Currently, the most common approach employs correlations of site class with maps of surficial geology. Analogously, correlations of site class...
Are there optimal densities for prairie birds?
S. K. Skagen, A.A.Y. Adams
2010, Condor (112) 8-14
The major forces of food and predation shape fitness-enhancing decisions of birds at all stages of their life cycles. During the breeding season, birds can minimize nest loss due to predation by selecting sites with a lower probability of predation. To understand the environmental and social aspects and consequences of...
Subspecies status and population genetic structure in Piping Plover (Charadrius melodus)
M.P. Miller, S. M. Haig, C. L. Gratto-Trevor, T.D. Mullins
2010, The Auk (127) 57-71
Piping Plover (Charadrius melodus) is a migratory shorebird that is listed as endangered in Canada and the U.S. Great Lakes and as threatened throughout the rest of its breeding and winter range. We undertook a comprehensive molecular-genetic investigation to (1) address subspecific taxonomy, (2) characterize population genetic structure, and (3)...
Allocating monitoring effort in the face of unknown unknowns
B.A. Wintle, M.C. Runge, S.A. Bekessy
2010, Ecology Letters (13) 1325-1337
There is a growing view that to make efficient use of resources, ecological monitoring should be hypothesis-driven and targeted to address specific management questions. 'Targeted' monitoring has been contrasted with other approaches in which a range of quantities are monitored in case they exhibit an alarming trend or provide ad...
