Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10486
A comparison of drainage basin nutrient inputs with instream nutrient loads for seven rivers in Georgia and Florida, 1986-90 A comparison of drainage basin nutrient inputs with instream nutrient loads for seven rivers in Georgia and Florida, 1986-90
Instream nutrient loads of the Altamaha, Suwannee, St. Johns, Satilla, Ogeechee, Withlacoochee, and Ochlockonee River Basins were computed and compared with nutrient inputs for each basin for the period 1986-90. Nutrient constituents that were considered included nitrate, ammonia, organic nitrogen, and total phosphorus. Sources of nutrients considered for this analysis included...
Authors
C.E. Asbury, E. T. Oaksford
Trends in nutrient concentration and load for streams in the Mississippi River Basin, 1974-94 Trends in nutrient concentration and load for streams in the Mississippi River Basin, 1974-94
Trends in nutrient concentration and load are computed for 40 stations on 24 streams in the Mississippi River Basin. The drainage area of the Mississippi Basin covers about 42 percent of the conterminous United States, and the Mississippi River discharges about 420 billion gallons per day of freshwater to the Gulf of Mexico. The period for which trends are analyzed varies for each...
Authors
Dee L. Lurry, David E. Dunn
A GIS Interface for Environmental System Analysis: Application to the South Florida Ecosystem A GIS Interface for Environmental System Analysis: Application to the South Florida Ecosystem
No abstract available.
Authors
Water Resources Division U.S. Geological Survey
Hydraulic analyses of alternative methods for reducing backwater from log jams on Locust Creek near Pershing State Park, Linn County, Missouri Hydraulic analyses of alternative methods for reducing backwater from log jams on Locust Creek near Pershing State Park, Linn County, Missouri
No abstract available.
Authors
T.W. Alexander
Evaluation of drawdown and sources of water in the Mississippi River alluvium caused by hypothetical pumping, Muscatine, Iowa Evaluation of drawdown and sources of water in the Mississippi River alluvium caused by hypothetical pumping, Muscatine, Iowa
A study was conducted to evaluate drawdown and volumetric changes in sources of water in the Mississippi River alluvium caused by hypothetical pumping. A steady-state, ground-water flow model was constructed for a previous study to simulate February 1993 hydrologic conditions, which were assumed to be an acceptable estimate of the ground-water system at equilibrium. The flow model was...
Authors
K.J. Lucey
The jumping crocs of the Adelaide River The jumping crocs of the Adelaide River
Abstract not supplied at this time
Authors
C.K. Dodd
Reforestation of bottomland hardwoods and the issue of woody species diversity Reforestation of bottomland hardwoods and the issue of woody species diversity
Bottomland hardwood forests in the southcentral United States have been cleared extensively for agriculture, and many of the remaining forests are fragmented and degraded. During the last decade, however, approximately 75,000 ha of land-mainly agricultural fields-have been replanted or contracted for replanting, with many more acres likely to be reforested in the near future. The...
Authors
J. A. Allen
A structural equation model of plant species richness and its application to a coastal wetland A structural equation model of plant species richness and its application to a coastal wetland
Studies of plant species richness have often emphasized the role of either community biomass (as an indicator of density effects) or abiotic factors. In this article we present a general model that simultaneously examines the relative importance of abiotic and density effects. General and specific models were developed to examine the importance of abiotic conditions, disturbance, and...
Authors
J.B. Grace, B.H. Pugesek
An automated HPLC method for the fractionation of polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins, and polychlorinated dibenzofurans in fish tissue on a porous graphitic carbon column An automated HPLC method for the fractionation of polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins, and polychlorinated dibenzofurans in fish tissue on a porous graphitic carbon column
The Ah (aryl-hydrocarbon) hydroxylase-receptor active polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) were fractionated by an automated high-performance liquid chromatography (HPLC) system using the Hypercarb™ porous graphitic carbon (PGC) column. This commercially available column was used to fractionate the di-, mono...
Authors
Kathy R. Echols, Robert W. Gale, Donald E. Tillitt, Ted R. Schwartz, Jerome O’Laughlin
Shell injuries and anomalies in an insular population of Florida box turtles (Terrapene carolina bauri) Shell injuries and anomalies in an insular population of Florida box turtles (Terrapene carolina bauri)
Abstract not supplied at this time
Authors
C.K. Dodd, R. Franz, S. A. Johnson
Hydrology of the shallow aquifer and uppermost semiconfined aquifer near El Paso, Texas Hydrology of the shallow aquifer and uppermost semiconfined aquifer near El Paso, Texas
The availability of fresh ground water in El Paso and adjacent areas that is needed to meet increased demand for water supply concerns local, State, and Federal agencies. The Hueco bolson is the principal aquifer in the El Paso area. Starting in the early 1900s and continuing to the 1950s, most of the municipal and industrial water supply in El Paso was pumped from the Hueco bolson...
Authors
D. E. White, E. T. Baker, Roger Sperka