Sediment resuspension and transport patterns on a fringing reef flat, Molokai, Hawaii
A.S. Ogston, C. D. Storlazzi, M.E. Field, M.K. Presto
2004, Coral Reefs (23) 559-569
Corals are known to flourish in various turbid environments around the world. The quantitative distinction between clear and turbid water in coral habitats is not well defined nor are the amount of sediment in suspension and rates of sedimentation used to evaluate the condition of reef environments well established. This...
Effects of Ichthyophonus on survival and reproductive success of Yukon River Chinook salmon. Final report for study 01-200
R. Kocan, P. Hershberger, J. Winton
2004, Report
No abstract available ...
Canada lynx Lynx canadensis habitat and forest succession in northern Maine, USA
C.L. Hoving, D.J. Harrison, W.B. Krohn, W.J. Jakubas, M.A. McCollough
2004, Wildlife Biology (10) 285-294
The contiguous United States population of Canada lynx Lynx canadensis was listed as threatened in 2000. The long-term viability of lynx populations at the southern edge of their geographic range has been hypothesized to be dependent on old growth forests; however, lynx are a specialist predator on snowshoe hare Lepus...
Study on geophone coupling and attenuating compensatory of low-depression velocity layer in desert area
Z. Shi, G. Tian, S. Dong, J. Xia, H. He
Chen C.Xia J., editor(s)
2004, Conference Paper, Progress in Environmental and Engineering Geophysics: Proceedings of the International Conference on Environmental and Engineering Geophysics, ICEEG 2004
In a desert area, it is difficult to couple geophones with dry sands. A low and depression velocity layer can seriously attenuate high frequency components of seismic data. Therefore, resolution and signal-to-noise (S/N) ratio of seismic data deteriorate. To enhance resolution and S/N ratio of seismic data, we designed a...
Winter orographic precipitation ratios in the Sierra Nevada: Large-scale atmospheric circulations and hydrologic consequences
M. Dettinger, K. Redmond, D. Cayan
2004, Journal of Hydrometeorology (5) 1102-1116
The extent to which winter precipitation is orographically enhanced within the Sierra Nevada of California varies from storm to storm, and season to season, from occasions when precipitation rates at low and high altitudes are almost the same to instances when precipitation rates at middle elevations (considered...
Water loss in the Potomac River basin during droughts
E.R. Hagen, J.E. Kiang, J.J.A. Dillow
Sehlke G.Hayes D.F.Stevens D.K., editor(s)
2004, Conference Paper, Proceedings of the 2004 World Water and Environmetal Resources Congress: Critical Transitions in Water and Environmetal Resources Management
The water loss phenomena in the Washington DC metropoliton area's (WMA) Potomac River water supply basin during droughts was analyzed. Gage errors, permitted withdrawals, evaporation, and transpiration by trees along the river were investigated to account for loss. The Interstate Commission on the Potomac River Basin (ICPRB) calculated potential gage...
The effects of wavelet compression on Digital Elevation Models (DEMs)
M. J. Oimoen
2004, Conference Paper, 2004 IEEE International Geoscience and Remote Sensing Symposium proceedings
This paper investigates the effects of lossy compression on floating-point digital elevation models using the discrete wavelet transform. The compression of elevation data poses a different set of problems and concerns than does the compression of images. Most notably, the usefulness of DEMs depends largely in the quality of their...
Evaluation of ultrastructure and random effects band recovery models for estimating relationships between survival and harvest rates in exploited populations
David L. Otis, Gary C. White
2004, Animal Biodiversity and Conservation (27) 157-173
Increased population survival rate after an episode of seasonal exploitation is considered a type of compensatory population response. Lack of an increase is interpreted as evidence that exploitation results in added annual mortality in the population. Despite its importance to management of exploited species, there are limited statistical techniques for...
Comparisons of ground motions from five aftershocks of the 1999 Chi-Chi, Taiwan, earthquake with empirical predictions largely based on data from California
G.-Q. Wang, D.M. Boore, H. Igel, X.-Y. Zhou
2004, Bulletin of the Seismological Society of America (94) 2198-2212
The observed ground motions from five large aftershocks of the 1999 Chi-Chi, Taiwan, earthquake are compared with predictions from four equations based primarily on data from California. The four equations for active tectonic regions are those developed by Abrahamson and Silva (1997), Boore et al. (1997), Campbell (1997, 2001), and...
40Ar/39Ar dating of the eruptive history of Mount Erebus, Antarctica: Summit flows, tephra, and caldera collapse
C.J. Harpel, P.R. Kyle, R.P. Esser, W. C. McIntosh, D.A. Caldwell
2004, Bulletin of Volcanology (66) 687-702
Eruptive activity has occurred in the summit region of Mount Erebus over the last 95 ky, and has included numerous lava flows and small explosive eruptions, at least one plinian eruption, and at least one and probably two caldera-forming events. Furnace and laser step-heating 40Ar/39Ar ages have been determined for...
Illinois drainage water management demonstration project
D.J. Pitts, R. Cooke, P. J. Terrio
Cooke R.A., editor(s)
2004, Conference Paper, Proceedings of the 8th International Drainage Symposium - Drainage VIII
Due to naturally high water tables and flat topography, there are approximately 4 million ha (10 million ac) of farmland artificially drained with subsurface (tile) systems in Illinois. Subsurface drainage is practiced to insure trafficable field conditions for farm equipment and to reduce crop stress from excess water within the...
The Susitna Glacier thrust fault: Characteristics of surface ruptures on the fault that initiated the 2002 Denali fault earthquake
A. J. Crone, S. F. Personius, P. A. Craw, Peter J. Haeussler, L. A. Staft
2004, Bulletin of the Seismological Society of America (94) S5-S22
The 3 November 2002 Mw 7.9 Denali fault earthquake sequence initiated on the newly discovered Susitna Glacier thrust fault and caused 48 km of surface rupture. Rupture of the Susitna Glacier fault generated scarps on ice of the Susitna and West Fork glaciers and on tundra and surficial deposits along the southern...
Earthquake triggering at Alaskan volcanoes following the 3 November 2002 Denali fault earthquake
S.C. Moran, J.A. Power, S.D. Stihler, J.J. Sanchez, J. Caplan-Auerbach
2004, Bulletin of the Seismological Society of America (94) S300-S309
The 3 November 2002 Mw 7.9 Denali fault earthquake provided an excellent opportunity to investigate triggered earthquakes at Alaskan volcanoes. The Alaska Volcano Observatory operates short-period seismic networks on 24 historically active volcanoes in Alaska, 247-2159 km distant from the mainshock epicenter. We searched for evidence of triggered seismicity by...
Estimates of fish, spill, and sluiceway passage efficiencies of radio-tagged juvenile salmonids relative to the operation of the J-design Sluiceway Guidance Improvement Device at The Dalles Dam in 2002
B. Hausmann, J. Beeman, H. Hansel, S. Juhnke, P. Haner
2004, Report
No abstract available ...
Concentrations of arsenic, cadmium, copper, lead, selenium, and zinc in fish from the Mississippi River Basin, 1995
Christopher J. Schmitt
2004, Environmental Monitoring and Assessment (90) 289-321
Fish were collected in late 1995 from 34 National Contaminant Biomonitoring Program (NCBP) stations and 12 National Water Quality Assessment Program (NAWQA) stations in the Mississippi River basin (MRB), and in late 1996 from a reference site in West Virginia. The NCBP sites represented key points (dams, tributaries, etc.) in...
Comparison of geodetic and glaciological mass-balance techniques, Gulkana Glacier, Alaska, U.S.A
L.H. Cox, R.S. March
2004, Journal of Glaciology (50) 363-370
The net mass balance on Gulkana Glacier, Alaska, U.S.A., has been measured since 1966 by the glaciological method, in which seasonal balances are measured at three index sites and extrapolated over large areas of the glacier. Systematic errors can accumulate linearly with time in this method. Therefore, the geodetic balance,...
Geophysical data reveal the crustal structure of the Alaska Range orogen within the aftershock zone of the Mw 7.9 Denali fault earthquake
M. A. Fisher, N. A. Ratchkovski, W. J. Nokleberg, L. Pellerin, J.M.G. Glen
2004, Bulletin of the Seismological Society of America (94) S107-S131
Geophysical information, including deep-crustal seismic reflection, magnetotelluric (MT), gravity, and magnetic data, cross the aftershock zone of the 3 November 2002 Mw 7.9 Denali fault earthquake. These data and aftershock seismicity, jointly interpreted, reveal the crustal structure of the right-lateral-slip Denali fault and the eastern Alaska Range orogen, as well...
Olfactory sensitivity of Pacific lampreys to conspecific bile acids
T.C Craig, J.M. Bayer, J.G. Seelye
2004, Report
No abstract available ...
Status of Virgin River chub and other fishes of the Muddy River following 1995 invasion of blue tilapia in Warm Springs Area
K.M. Swaim, R.R McShane, G.G. Scoppettone
2004, Report
No abstract available ...
U.S. land cover and land use change—1973-2000
D.E. Napton, Thomas R. Loveland
B. Warf, D. Janelle, K. Hansen, editor(s)
2004, Book chapter, WorldMinds—geographical perspectives on 100 problems
No abstract available....
Fort Collins Science Center: Policy Analysis and Science Assistance
Berton L. Lamb
2004, Fact Sheet 2004-3144
Most resource management decisions involve the integrated use of biological, sociological, and economic information. Combining this information provides a more comprehensive basis for making effective land management and conservation decisions. Toward this end, scientists in the Policy Analysis and Science Assistance Branch (PASA) of the Fort Collins Science Center (FORT)...
Colorado Canyons National Conservation Area 2003 visitor use survey: Completion report
Phadrea Ponds, Shana C. Gillette, Lynne Koontz
2004, Open-File Report 2004-1281
This report represents the analysis of research conducted by the U.S. Geological Survey (USGS) for the Bureau of Land Management (BLM). The purpose is to provide socio-economic and recreational use information that can be used in the development of a Resource Management Plan (RMP) for the Colorado Canyons National Conservation...
Stratton Sagebrush Hydrology Study Area: An annotated bibliography of research conducted 1968-1990
Leah M. Burgess, Kathryn A. Schoenecker
2004, Open-File Report 2004-1291
This annotated bibliography provides an overview of research projects conducted on the Stratton Sagebrush Hydrology Study Area (Stratton) since its designation as such in 1967. Sources include the Rocky Mountain Forest and Range Experiment Station records storage room, Laramie, Wyoming, the USGS and USFS online reference libraries, and scientific journal...
Quality assurance report - Loch Vale watershed, 1999-2002
Jorin A. Botte, Jill Baron
2004, Open-File Report 2004-1306
The National Park Service initiated the Loch Vale Watershed (LVWS) project in 1980 with funding from the Aquatic Effects Research Program of the National Acid Precipitation Assessment Program. Long-term ecological research and monitoring address watershed-scale ecosystem processes, particularly as they respond to atmospheric deposition and climate variability. Monitoring of meteorological,...
Fort Collins Science Center: Aquatic Systems and Technology Applications
Dave Hamilton
2004, Fact Sheet 2004-3149
Land and water management agencies are responsible for restoring and conserving our nation's natural resources. However, they face increasing, often competing demands for those resources, which can result in alteration or loss of critical riverine, riparian, wetland, and terrestrial habitats. Land and resource managers may be in federal, state, or...
