Conference Papers
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
Filter Total Items: 5518
Relation of channel stability to scour at highway bridges over waterways in Maryland Relation of channel stability to scour at highway bridges over waterways in Maryland
Data from assessments of channel stability and observed-scour conditions at 876 highway bridges over Maryland waterways were entered into a database. Relations were found to exist among specific, deterministic variables and observed-scour and debris conditions. Relations were investigated between (1) high-flow angle of attack and pier- and abutment-footing exposure, (2)abutment location...
Authors
Edward J. Doheny
Relation of local scour to hydraulic properties at selected bridges in New York Relation of local scour to hydraulic properties at selected bridges in New York
Hydraulic properties, bridge geometry, and basin characteristics at 31 bridges in New York are being investigated to identify factors that affect local scour. Streambed elevations measured by the U.S. Geological Survey and New York State Department of Transportation are used to estimate local-scour depth. Data that show zero or minor scour were included in the analysis to decrease bias...
Authors
Gerard K. Butch
Repeatability and oblique flow response characteristics of current meters Repeatability and oblique flow response characteristics of current meters
Laboratory investigation into the precision and accuracy of various mechanical-current meters are presented. Horizontal-axis and vertical-axis meters that are used for the measurement of point velocities in streams and rivers were tested. Meters were tested for repeatability and response to oblique flows. Both horizontal- and vertical-axis meters were found to under- and over-register...
Authors
Janice M. Fulford, Kirk G. Thibodeaux, William R. Kaehrle
Reproduction of an exotic riparian tree willow, Salix fragilis (L.), in Colorado Reproduction of an exotic riparian tree willow, Salix fragilis (L.), in Colorado
No abstract available.
Authors
P.B. Shafroth, M. L. Scott, J.M. Friedman, R. D. Laven
Reproduction of an exotic riparian tree willow, Salix fragilis (L.), in Colorado Reproduction of an exotic riparian tree willow, Salix fragilis (L.), in Colorado
No abstract available.
Authors
P.B. Shafroth, M. L. Scott, Jonathan M. Friedman, R. D. Laven
Research and education to improve surface and ground-water quality of a claypan soil--Proceedings of agricultural research to protect water quality Research and education to improve surface and ground-water quality of a claypan soil--Proceedings of agricultural research to protect water quality
No abstract available.
Authors
E.E. Alberts, D. W. Blevins, N. K. Kitchen, Tony Prato
Reservoir anisotropy and facies stratigraphic framework in the Paleocene Fort Union Formation, western Wind River basin Reservoir anisotropy and facies stratigraphic framework in the Paleocene Fort Union Formation, western Wind River basin
Investigation of reservoir anisotropy and lithofacies stratigraphic framework in the Fort Union Formation in western Wind River Basin, Wyoming focused on excellent surface exposures in the Shotgun Butte, Eagle Point, and Shotgun Bench synclines, and in the Merriam anticline area of the Wind River Reservation (Fig. 1). A complementary study was made of the formation in the Muddy Ridge and...
Authors
R. M. Flores, C. W. Keighin
Rheometry of natural sediment slurries Rheometry of natural sediment slurries
Recent experimental analyses of natural sediment slurries yield diverse results yet exhibit broad commonality of rheological responses under a range of conditions and shear rates. Results show that the relation between shear stress and shear rate is primarily nonlinear, that the relation can display marked hysteresis, that minimum shear stress can occur following yield, that physical...
Authors
Jon J. Major
Salt transport in a tidal canal, West Neck Creek, Virginia Salt transport in a tidal canal, West Neck Creek, Virginia
Flow and stability were monitored during 1989-92 in West Neck Creek, Virginia, which provides a direct hydraulic connection between the saline waters of Chesapeake Bay and the relatively fresh waters of Currituck Sound, North Carolina. Flow in the tidal creek was to the south 64 percent of the time, but 80 percent of the southward flows were less than 40 cubic feet per second. The...
Authors
Jerad D. Bales, Stanley C. Skrobialowski
Scour at a bridge over the Weldon River, Iowa Scour at a bridge over the Weldon River, Iowa
Contraction scour at the State Highway 2 bridge over the Weldon River in south-central Iowa was caused by a flood of record proportions on September 14 and 15, 1992. The peak discharge was 1, 930 cubic meters per second,which was 4 times the probable 100-year flood used to design the bridge, and resulted in road overflow. Contraction scour exposed the pier footings, but a subsurface...
Authors
Edward E. Fischer
Scourata bridge over the Weldon River, Iowa. Scourata bridge over the Weldon River, Iowa.
No abstract available
Authors
E.E. Fischer
Seabirds of the central North Pacific Seabirds of the central North Pacific
No abstract available.
Authors
P.J. Gould, John F. Piatt