Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10420
Agricultural chemical screening and detection of chlorpyrifos in fishes from the Apure drainage, Venezuela Agricultural chemical screening and detection of chlorpyrifos in fishes from the Apure drainage, Venezuela
Abstract not supplied at this time
Authors
L.G. Nico, D.J. Schaeffer, D.C. Taphorn, A. Barbarino-Duque.
Contaminants in fishes from Great Lakes-influenced sections and above dams of three Michigan rivers. I: Concentrations of organo chlorine insecticides, polychlorinated biphenyls, dioxin equivalents, and mercury Contaminants in fishes from Great Lakes-influenced sections and above dams of three Michigan rivers. I: Concentrations of organo chlorine insecticides, polychlorinated biphenyls, dioxin equivalents, and mercury
Fishes of the Great Lakes contain hazardous chemicals such as synthetic halogenated hydrocarbons and metals. These fish can move from the lakes into the Great Lakes tributaries of Michigan. In doing so, they transport concentrationsof contaminants which may represent a risk to wildlife. Concentrations of mercury (Hg), total polychlorinated biphenyls (PCBs), 2,3,7,8-tetrachlorodibenzo-p...
Authors
J. P. Giesy, D. A. Verbrugge, R. A. Othout, W.W. Bowerman, M.A. Mora, P. D. Jones, J.L. Newsted, C. Vandervoort, S. N. Heaton, R.J. Aulerich, S.J. Bursian, J. P. Ludwig, M. Ludwig, G. A. Dawson, T.J. Kubiak, D. A. Best, D. E. Tillitt
Simulations of flow in the Edwards-Trinity aquifer system and contiguous hydraulically connected units, west-central Texas Simulations of flow in the Edwards-Trinity aquifer system and contiguous hydraulically connected units, west-central Texas
The Edwards-Trinity aquifer system is currently (1993) being studied as part of the Regional Aquifer-Systems Analysis program. A major goal of the project is to understand and describe the regional ground-water flow system. A finite-element model for simulating two-dimensional steady-state ground-water flow was applied to the major aquifers of the Edwards-Trinity aquifer system and...
Authors
E. L. Kuniansky, K. Q. Holligan
Determination of chlorinated insecticides in bottom sediment using an electron-capture gas chromatography screening method, Austin, Texas, 1991 and 1992 Determination of chlorinated insecticides in bottom sediment using an electron-capture gas chromatography screening method, Austin, Texas, 1991 and 1992
Twenty-two bottom-sediment samples were collected from Town Lake in Austin, Texas, in 1991 and 1992 and analyzed for chlorinated insecticides by a reconnaissance-quality, electron-capture gas chromatography screening method developed by the U.S. Geological Survey (USGS). Four different chlorinated insecticides (aldrin, chlordane, dieldrin, and p,p'-DDT) and two degradation products of p...
Authors
Robert D. Brock, Lucinda K. Murtagh
Use of landsat thematic mapper data to identify crop types and estimate irrigated acreage, Uvalde and Medina counties, Texas, 1991 Use of landsat thematic mapper data to identify crop types and estimate irrigated acreage, Uvalde and Medina counties, Texas, 1991
Landsat Thematic Mapper (TM) data were used to estimate that about 51,000 acres of crops were irrigated with water pumped from the Edwards aquifer in Uvalde and Medina Counties, Texas in 1991. Bands 2, 3,4, and 5 from a TM image for August 10,1991, were classified using the maximum-likelihood, unsupervised-classification procedure to identify the areas of crops irrigated in the two...
Authors
L.H. Raymond, S.I. McFarlane
Ecological risk assessment: Application of new approaches and uncertainty analysis Ecological risk assessment: Application of new approaches and uncertainty analysis
No abstract available.
Authors
Lawrence A. Burns, Christopher G. Ingersoll, Gary A. Pascoe
Portable platforms for setting rocket nets in open-water areas Portable platforms for setting rocket nets in open-water areas
Portable platforms for setting rocket nets in open-water habitats were developed and used to capture 1116 waterfowl of seven species during September and October 1991 and 1992 in southwestern Louisiana. Incidence of mortality (1% of captured birds) and escape (3% of captured birds) was low. Rocket-netting from platforms was a reliable and efficient technique for capturing waterfowl, and...
Authors
R. R. Cox, A. D. Afton
Accumulation of 2,3,7,8-Tetrachlorodibenzo-p-dioxin equivalents by double-crested cormorant (Phalacrocorax auritus, Pelicaniformes) chicks in the North American Great Lakes Accumulation of 2,3,7,8-Tetrachlorodibenzo-p-dioxin equivalents by double-crested cormorant (Phalacrocorax auritus, Pelicaniformes) chicks in the North American Great Lakes
Concentrations of polychlorinated biphenyls (PCBs), and 2,3,7,8-tetrachlordibenzo-p-dioxin equivalents (TCDD-EQ) were determined in eggs and chicks of double-crested cormorants (DCC) which were collected in 1989 from eight locations in the Laurentian Great Lakes. The mean biomagnification factor (BMF) from forage fish to eggs was found to be 31.3. Absolute and relative concentrations as...
Authors
P. D. Jones, J. P. Giesy, J.L. Newsted, D. A. Verbrugge, J.P. Ludwig, M. E. Ludwig, H. J. Auman, R. Crawford, D. E. Tillitt, T.J. Kubiak, D. A. Best
Acute and chronic effects of four commercial herbicide formulations on Ceriodaphnia dubia Acute and chronic effects of four commercial herbicide formulations on Ceriodaphnia dubia
Toxicity tests with Ceriodaphnia dubia were conducted to determine acute (48 h) and chronic (7-day survival and reproduction) effects of four commonly used herbicide formulations. The 48-h LC50s in decreasing order of toxicity were 14.36 mg/L (Micro-Tech®), 15.93 mg/L (Bicep®), 32.99 mg/L (Extrazine®), and 35.36 mg/L (Lexone®). Reduced reproduction was detected at concentrations below 48...
Authors
M. P. Ort, J.F. Fairchild, S.E. Finger
Spatial and temporal statistical analysis of a ground-water level network, Broward County, Florida Spatial and temporal statistical analysis of a ground-water level network, Broward County, Florida
The U.S. Geological Survey has developed a method to evaluate the spatial and temporal statistics of a continuous ground-water level recorder network in Broward County, Florida. Because the Broward County network is sparse for most spatial statistics, a technique has been developed to define polygons for each well that represent the area monitored by the well within specified criteria...
Authors
E.D. Swain, R.S. Sonenshein
Water resources data, South Carolina, water year 1993 Water resources data, South Carolina, water year 1993
Water Resources data for the 1993 water year for South Carolina consists of records of stage, discharge, and water quality of streams; stage and contents of lakes and reservoirs; and levels of ground-water wells. This volume contains records for water discharge at 121 gaging stations, stage only at 39 gaging stations, stage and contents at 12 lakes and reservoirs, water-quality at 34...
Authors
C.S. Bennett, T.W. Cooney, K.H. Jones, P.A. Drewes