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Publications

Publications from USGS science centers throughout the Southeast Region.

Filter Total Items: 10386

Simulation of unsteady flow in the Roanoke River from near Oak City to Williamston, North Carolina Simulation of unsteady flow in the Roanoke River from near Oak City to Williamston, North Carolina

A one-dimensional, unsteady-flow model was calibrated, validated, and applied to a 30.4-mile reach of the Roanoke River between State Highway 42-11 bridge near Oak City (river mile 67.0) and the U.S. Highway 17-13 bridge at Williamston (river mile 36.6) North Carolina. The model was calibrated and validated for flows ranging from about 2,000 to 12,000 cubic feet per second. The model was...
Authors
A.G. Strickland, Jerad D. Bales

A toxic equivalency factor scale for polychlorinated dibenzofurans A toxic equivalency factor scale for polychlorinated dibenzofurans

The ethoxyresorufin O-deethylase (EROD) induction of 20 polychiorinated dibenzofurans (PCDFs) was examined in the H4IIE rat hepatoma cell bioassay. The selection of the compounds tested was based on a multivariate chemical characterization laying the groundwork for covering the whole chemical series of PCDFs. The EROD induction potency was found to vary in ED50 values from 25 to 100,000...
Authors
M. Tysklind, D. Tillitt, L. Eriksson, K. Lundgren, C. Rappe

Stream velocities and reaeration coefficients for the South Umpqua River between Tiller and Roseburg, Oregon, 1991 Stream velocities and reaeration coefficients for the South Umpqua River between Tiller and Roseburg, Oregon, 1991

Dye-tracer and gas-tracer studies were done in July and September 1991 during low flows on four reaches of the South Umpqua River between Tiller and Roseburg, Oregon. For a stream flow of 435 cubic feet per second at the Brockway streamflow monitoring site (14312000), the average stream velocity between Tiller and Myrtle Creek is estimated at 0.88 feet per second, and between Myrtle...
Authors
Antonius Laenen, W. H. Woo

Pesticide-sampling equipment, sample-collection and processing procedures, and water-quality data at Chicod Creek, North Carolina, 1992 Pesticide-sampling equipment, sample-collection and processing procedures, and water-quality data at Chicod Creek, North Carolina, 1992

Water-quality samples were collected from Chicod Creek in the Coastal Plain Province of North Carolina during the summer of 1992 as part of the U.S. Geological Survey's National Water-Quality Assessment Program. Chicod Creek is in the Albemarle-Pamlico drainage area, one of four study units designated to test equipment and procedures for collecting and processing samples for the solid...
Authors
T.K. Manning, K.E. Smith, C.D. Wood, J. B. Williams

Use of saltwater and freshwater habitats by wintering redheads in southern Texas Use of saltwater and freshwater habitats by wintering redheads in southern Texas

Behavioral data were gathered for redheads (Aythya americana Eyton) using saltwater and freshwater habitats in southern Texas, the northern portion of their major wintering range, in 1989–90. Saltwater and freshwater habitats were used for different purposes by wintering redheads. Approximately 41% of all redheads in saltwater habitats were feeding, while only 0.1% of redheads in...
Authors
Marc C. Woodin

Hydrologic data collection at Crowders Creek and Steele Creek, York County, South Carolina, 1991-92 Hydrologic data collection at Crowders Creek and Steele Creek, York County, South Carolina, 1991-92

Rapid industrial and urban growth is anticipated in the vicinity of Crowders Creek near Clover, S.C., and Steele Creek near Fort Mill, S.C. These subbasins are in the Catawba River Basin in York County, S.C. To obtain baseline information on these basins prior to urbanization, gaging stations 02145642 (Crowders Creek near Clover, S.C.) and 021467801 (Steele Creek near Fort Mill, S.C.)...
Authors
John W. Gissendanner

Description and application of capture zone delineation for a wellfield at Hilton Head Island, South Carolina Description and application of capture zone delineation for a wellfield at Hilton Head Island, South Carolina

Ground-water capture zone boundaries for individual pumped wells in a confined aquffer were delineated by using groundwater models. Both analytical and numerical (semi-analytical) models that more accurately represent the $round-water-flow system were used. All models delineated 2-dimensional boundaries (capture zones) that represent the areal extent of groundwater contribution to a...
Authors
J. E. Landmeyer

Contraction scour at a bridge over the Iowa River Contraction scour at a bridge over the Iowa River

Flooding of the Iowa River during July and August 1993 caused extensive contraction scour at the State Highway 99 bridge over the Iowa River at Wapello, Iowa. At least 3.3 m of piling under the footing of the second pier from the right (west) abutment were exposed. The scoured streambed did not fill in again after the flood receded, and a bathymetric survey in November 1993 showed that...
Authors
Edward E. Fischer
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