Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 9969
Modeling mangrove canopy reflectance using a light interaction model and an optimization technique
At 20 sites, incorporating mixtures of black, red, and white mangroves, canopy reflectance spectra were derived from high resolution spectral data taken from a helicopter platform. Canopy characteristics were predicted from the canopy reflectance spectra by using measured and estimated data as inputs into a light-canopy interaction model within a optimization routine. Pertinent to average conditio
Authors
Elijah Ramsey III, John R. Jensen
Wetlands, global climate change, and remote sensing
No abstract available.
Authors
Elijah Ramsey III
Disturbance and recovery of the Louisiana coastal marsh landscape from the impacts of Hurricane Andrew
The impact of Hurricane Andrew on the Louisiana coastal landscape and the initial recovery of wetland plant communities was determined from extensive surveys of a large geographic region of coastal marsh near Atchafalaya Bay and intensive studies of an oligohaline marsh on Otter Bayou. Wind and water movements associated with the hurricane resulted in the formation of compressed marsh, thick sedim
Authors
Glenn R. Guntenspergen, Donald R. Cahoon, James B. Grace, Gregory D. Steyer, Stephen Fournet, M. A. Townson, A. Lee Foote
Relations between benthic community structure and metals concentrations in aquatic macroinvertebrates: Clark Fork River, Montana
We sampled macroinvertebrate communities at six sites on the upper Clark Fork River, Montana, to determine relations between macroinvertebrate community structure and metals in invertebrates and the best benthic community metrics to use for ranking sites based on the relative severity of the effects of metals. Concentrations (μg/g) of six metals in invertebrates were determined: Al (range = 591–41
Postembryonic growth and development of Hyalella azteca in laboratory cultures and contaminated sediments
The environmental, biological, and ecological requirements of but a few species used in testing sediments are known and well understood. The present investigation was designed to provide fundamental information on the postembryonic growth and development of Hyalella azteca (Amphipoda) that can be used as sublethal indicators of contaminated sediments, and the influence growth characteristics may h
Authors
M.K. Nelson, Eric L. Brunson
Influences on copper bioaccumulation, growth, and survival of the midge, Chironomus tentans, in metal-contaminated sediments
Sediment bioassays with larvae of the midge, Chironomus tentans, were used to evaluate influences on the bioavailability and toxicity of copper (Cu) in sediments with a wide range of concentrations of metals, acid-volatile sulfide (AVS), and other physicochemical characteristics. Sediments were collected from sixteen lakes in Michigan, USA, and from twelve sites in the Clark Fork River drainage of
Authors
John M. Besser, Jody A. Kubitz, Chris G. Ingersoll, W. Emmett Braselton, John P. Giesy
Bluegill sunfish (Lepomis macrochirus) foraging behavior under temporally varying food conditions
No abstract available.
Authors
Mark L. Wildhaber, Larry B. Crowder
Copper, cadmium, and zinc concentrations in aquatic food chains from the Upper Sacramento River (California) and selected tributaries
Metals enter the Upper Sacramento River above Redding, California, primarily through Spring Creek, a tributary that receives acid-mine drainage from a US EPA Superfund site known locally as Iron Mountain Mine. Waterweed (Elodea canadensis) and aquatic insects (midge larvae, Chironomidae; and mayfly nymphs, Ephemeroptera) from the Sacramento River downstream from Spring Creek contained much higher
Authors
M. K. Saiki, D. T. Castleberry, T. W. May, B.A. Martin, F. N. Bullard
Water-quality assessment of the Trinity River Basin, Texas - Review and analysis of available pesticide information, 1968-91
In 1991 the Trinity River Basin study unit was among the first 20 study units in which work began under full-scale program implementation of the National Water-Quality Assessment Program. A retrospective assessment was undertaken to review and analyze existing pesticide data and related environmental factors. Population and land-use data indicate human modifications to the landscape and hydrologic
Authors
R.L. Ulery, M.F. Brown
Flood-frequency relations for urban streams in Georgia; 1994 update
A statewide study of flood magnitude and frequency in urban areas of Georgia was made to develop methods of estimating flood characteristics at ungaged urban sites. A knowledge of the magnitude and frequency of floods is needed for the design of highway drainage structures, establishing flood- insurance rates, and other uses by urban planners and engineers. A U.S. Geological Survey rainfall-runof
Authors
Ernest J. Inman
Regional rainfall-runoff relations for simulation of streamflow for watersheds in Lake County, Illinois
Rainfall and streamflow data collected in Lake County, Ill., from March 1990 through September 1993 were used to (1) calibrate a rainfall-runoff model for an area encompassing three watersheds (individual areas of 17.2, 35.7, and 37.0 mi2 (square miles) and (2) verify the regional model parameter set obtained from the calibration by applying the parameter set to rainfall-runoff models for an addit
Authors
James J. Duncker, Tracy J. Vail, Charles S. Melching
Assimilative capacity of the Waccamaw River and the Atlantic Intracoastal Waterway near Myrtle Beach, South Carolina, 1989-92
The assimilative capacities of selected reaches of the Waccamaw River and the Atlantic Intracoastal Waterway near Myrtle Beach, South Carolina, were determined using results from water-quality simulations by the Branched Lagrangian Transport Model. The study area included tidally influenced sections of the Waccamaw River, the Pee Dee River, Bull Creek, and the Atlantic Intracoastal Waterway. Hydro
Authors
P.A. Drewes, P.A. Conrads