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.
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Geographic information system/watershed model interface
Geographic information systems allow for the interactive analysis of spatial data related to water-resources investigations. A conceptual design for an interface between a geographic information system and a watershed model includes functions for the estimation of model parameter values. Design criteria include ease of use, minimal equipment requirements, a generic data-base management system, and
Authors
Gary T. Fisher
Geologic review. Better regulation through interagency cooperation
The Geologic Review procedure was developed by the Louisiana Geological Survey (LGS) in 1982 for the Louisiana Coastal Management Division. It consists of a thorough review of oil and gas well applications involving impact to environmentally sensitive areas such as wetlands. The applicant attends a meeting with a geologist and a petroleum engineer from the LGS who review the relevant geologic, eng
Authors
John E. Johnston, James D. Rives, David M. Soileau
Geomorphology of coastal sand dunes, Baldwin County, Alabama
Alabama's coastal eolian deposits are primarily vegetated dunes that are exemplified by sand ridges with flat to undulating upper surfaces and continuous irregular crests. Dune fields occur along Morgan peninsula between the foredune line and Little Lagoon and the Mobile Bay area. These dune fields consist primarily of one or more continuous ridges that parallel the coast and are generally vegetae
Authors
Bennett L. Bearden, Richard L. Hummell, Robert M. Mink
High-resolution two dimensional advective transport
The paper describes a two-dimensional high-resolution scheme for advective transport that is based on a Eulerian-Lagrangian method with a flux limiter. The scheme is applied to the problem of pure-advection of a rotated Gaussian hill and shown to preserve the monotonicity property of the governing conservation law.
Authors
P. E. Smith, B.E. Larock
Highway construction and wildlife preservation: Is there a compromise?
No abstract available at this time
Authors
B.E. Kus
History of the Federal Interagency Sedimentation Project
Since 1939, the date of the Project's inception, the team has operated under the direction of two lead agencies - the U.S. Geological Survey and U.S. Army Corps of Engineers. The supporting agencies are the Agricultural Research Service, Bureau of Reclamation, U.S. Forest Service, Bureau of Land Management, Federal Highway Administration, and the Tennessee Valley Authority. Overall direction of th
Authors
John V. Skinner
Hydraulic analysis of the Schoharie Creek bridge
Ten people died on April 5, 1987 as a result of the collapse of two spans of a New York State Thruway bridge into the floodwaters of Schoharie Creek. The cause of the bridge failure was determined to be scour of bed material from under the foundations of piers supporting the bridge. To evaluate the hydraulic conditions that produced the scour, a two-dimensional finite element surface-water flow mo
Authors
David C. Froehlich, Roy E. Trent
Idealized debris flow in flume with bed driven by a conveyor belt
The generalized viscoplastic fluid (GVF) model is used to derive the theoretical expressions of two-dimensional velocities and surface profile for debris flow established in a flume with bed driven by a conveyor belt. The rheological parameters of the GVF model are evaluated through the comparison of theoretical results with measured data. A slip velocity of the established (steady) nonuniform flo
Authors
Chi-Hai Ling, Cheng-lung Chen
Implementation of a hydrodynamic model for the upper Potomac Estuary
A vertically integrated, two-dimensional hydrodynamic/transport model has been implemented for the upper extent of the Potomac Estuary between Indian Head and Morgantown, Md. The model computes water-surface elevations, flow velocities, and time-varying constituent concentrations by numerically integrating finite-difference forms of the equations of mass and momentum conservation in conjunction wi
Authors
Raymond W. Schaffranek, Robert A. Baltzer
Land drainage and estuarine salinity response
An investigation is being conducted to (1) quantify the short-term effects of freshwater agricultural drainage on salinity in a tidal creek and (2) evaluate the off-site effects of water-control structures on flow and water quality in channels that drain cropland in the Albemarle-Pamlico region of North Carolina. A continuous record of velocity is being obtained in three canals. Salinity is being
Authors
Jerad D. Bales
Load-detention efficiencies in a dry-pond basin
Inflow and outflow to a dry-pond detention basin in Topeka, Kansas, were monitored for 19 storms during a 14-month period. Samples of runoff were collected automatically at two inflow and one outflow locations. Inflow and outflow constituent loads were computed with subsequent computation of load-detention efficiencies. Three constituents (dissolved solids, ammonia plus organic nitrogen, and total
Authors
Larry M. Pope, Larry G. Hess
Local scour at bridge abutments
Comparison of local scour depths at bridge abutments computed using different equations yields a large variation in predicted values. To consolidate the fragmented results of previous investigations and assemble the most comprehensive data set possible, reported laboratory measurements of local scour at the end of an obstruction protruding from the side of an open channel of rectangular cross sect
Authors
David C. Froehlich