Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 9969
The importance of fluvial hydraulics to fish-habitat restoration in low-gradient alluvial streams
1. A major cause of degradation and loss of stream fish is alteration of physical habitat within and adjacent to the channel. We describe a potentially efficient approach to fish restoration based upon the relationship between fluvial hydraulics, geomorphology, and those habitats important to fish.2. The aquatic habitat in a low-gradient, alluvial stream in the Ozark Plateaus physiographical provi
Authors
Charles F. Rabeni, Robert B. Jacobson
Regional assessment of factors related to herbicides and nitrate in near-surface aquifers of the midcontinent
No abstract available.
Authors
M. R. Burkart, D.W. Kolpin
Recent growth increases in old-growth longleaf pine
Longleaf pine (Pinuspalustris Mill.) tree-ring data were obtained from an old-growth stand located in Thomas County, Georgia. The tree-ring chronology from the pine stand is composed of a collection of cores extracted from 26 trees ranging in age from approximately 100 to 400 years. These cores were prepared, dated, and measured, and the resulting data were examined with dendrochronological and st
Authors
D.C. West, T.W. Doyle, M.L. Tharp, J.J. Beauchamp, William J. Platt, D.J. Downing
Trinity River Basin, Texas
In 1991 the Trinity River Basin National Water-Quality Assessment (NAWQA) will include assessments of surface-water and ground-water quality. Initial efforts have focused on identifying water-quality issues in the basin and on the environmental factors underlying those issues. Physical characteristics described include climate, geology, soils, vegetation, physiography, and hydrology. Cultural char
Authors
Randy L. Ulery, Peter C. Van Metre, Allison S. Crossfield
Chronic toxicity of Pydraul 50E to lake trout
Industrial phosphate esters, both triaryl and alkyl aryl phosphate esters, are used as fire resistant hydraulic fluids and as fire retardant plasticizers (Lapp 1976). Hydraulic fluids probably represent the largest contribution of phosphate ester compounds released into the environment. Lapp (1976) estimated that 65 to 70 percent of all phosphate ester hydraulic fluids were utilized in automotive
Authors
Foster L. Mayer, Daniel F. Woodward, William J. Adams
Chronic toxicity of the bromoxynil formulation Buctril® to Daphnia magna exposed continuously and intermittently
Two chronic toxicity tests were conducted in which Daphnia magna were either continuously or intermittently exposed to bromoxynil octanoate (BO; as Buctril®) for 28 d. In the intermittent exposure test, daphnids were exposed to daily pulses of BO with 24-h mean concentrations equal to those in the continuous exposure test, and the peak concentrations were three times the 24-h mean values. After 28
Authors
Kevin J. Buhl, Steven J. Hamilton, James C. Schmulbach
A multifunctional decision support GIS for coastal management
No abstract available.
Authors
Wei Ji, Loyd C. Mitchell, Marcia McNiff, James B. Johnston
Natural resource problem solving: An interdisciplinary approach in coastal Louisiana
No abstract available.
Authors
A. Lee Foote, Virginia R. Burkett, S. Jeffress Williams
Sensitivity of early-life stage golden trout to low pH and elevated aluminum
Early-life-stage golden trout (Oncorhynchus aguabonita aguabonita) were exposed to acid and Al to examine the response and determine the sensitivity of a western, alpine salmonid to conditions simulating an episodic pH depression. Freshly fertilized eggs, alevins, and swim-up larvae were exposed for 7 d to one of 12 combinations of pH and Al, and surviving fish were held to 40 d post-hatch to dete
Authors
Aaron J. Delonay, Edward E. Little, Daniel F. Woodward, William G. Brumbaugh, Aïda M. Farag, Charles F. Rabeni
Laguna madre: Seagrass changes continue decades after salinity reduction
Vegetation maps of the lower Laguna Madre prepared from surveys conducted in 1965–1967, 1974–1976, and 1988 document a >330 km2 decrease in cover byHalodule wrightii, an increase of almost 190 km2 in other seagrass species, and an increase of 140 km2 in bare bottom. Loss in seagrass cover is confined to deeper parts of the laguna; turbidity caused by maintenance dredging is the suspected cause. Th
Authors
Millicent L. Quammen, Christopher P. Onuf
Flood hydrology and geomorphic effects on river channels and flood plains: The flood of November 4-5, 1985, in the South Branch Potomac River Basin of West Virginia
The November 1985 flood was the largest recorded in the South Branch Potomac River basin. Discharges exceeded values estimated for a recurrence interval of 500 yr at four of six stations in the basin. Flow velocities in the channel were as high as 4.6 m/s and may have exceeded 6 m/s at some locations; estimated values of unit stream power at U.S. Geological Survey gage locations were as high as 98
Authors
Andrew J. Miller, Douglas J. Parkinson
Depositional aspects of the November 1985 Flood on Cheat River and Black Fork, West Virginia
Widespread, intense rainfall in November 1985 produced floods that exceeded all historic events on Cheat River and most of its tributaries. Official discharge estimates for Cheat River ranged from 4,800 to 5,380 m3 /s (170,000-190,000 ft3/s) with a recurrence interval of >100 yr. In addition to considerable property damage and the loss of five lives, the November 1985 flood left a variety of depos
Authors
J. S. Kite, R. C. Linton