Now showing items 1-20 of 138

    • A Conceptual Framework and Benefit Transfer for Valuation of Select Ecosystem Goods and Services Provided by the Wetlands of the Okefenokee National Wildlife Refuge 

      Patton, D. A.; Bergstrom, John C.; Covich, A.; Moore , R. (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      The USFWS manages the National Wildlife Refuge System, which is the world’s premier example of public lands designated for their wildlife habitat value. We examine the feasibility of estimating the economic value of ecosystem ...
    • Using the USGS Dougherty Plain Groundwater Model for Ensemble Analysis 

      Wen, Menghong; Liang, Hailian; Zeng, Wei (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      Up to this point, the USGS Dougherty Plain groundwater model has been used primarily to analyze the impact of groundwater irrigation on reduction of groundwater discharge into surface water stream flow. The original ...
    • Constructing a Conceptual Model Linking Drivers and Ecosystem Services in Piedmont Streams 

      McKay, S. Kyle; Pruitt, Bruce A.; Anderson, Christoper J.; Curran, Joanna; Del Arco Ochoa, Ana; Freeman, Mary C.; Rashleigh, Brenda; Trawick, E. Dean (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      Under rapid land use change, high demand on freshwater ecosystem services, and a growing appreciation for the value of functioning ecosystems, the Appalachian Piedmont has developed a multi-million dollar stream restoration ...
    • Quest for Water in Coastal Georgia – Assessment of Alternative Water Sources at Hunter Army Airfield, Chatham County, Georgia 

      Clarke, John S. (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      To meet growing demands for water in the coastal Georgia area, the U.S. Geological Survey, in cooperation with the U.S. Department of the Army, conducted detailed site investigations and modeling studies at Hunter Army ...
    • Interbasin Transfers of Water 

      Cole, Dargan (Scott), Sr.; Carver, William Bradley (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      Population growth, environmental constraints and climate change can adversely affect water supply systems’ ability to keep up with demand. Officials with state and local jurisdictions struggle to evaluate demand-side ...
    • Ground Penetrating Radar (GPR) Analysis of Soil Moisture Within Different Landuses in an Agriculture Landscape, in Georgia, US 

      Giraldo, Mario A.; Gale, Sara (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      Soil moisture is a critical process in the water cycle and its assessment is of paramount importance to forecast changes in the water balance of a region. Ground Penetrating Radar (GPR) technology overcomes the limitations ...
    • A Comparison of Gulf Coastal Plain Isolated Wetlands: Water Quality and Larval Mosquito Populations in Agricultural and Reference Sites 

      Golladay, Stephen W.; Vedas, Ellen; Blackmore, Mark; Smith, Nathalie D. (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      Geographically isolated wetlands, i.e. those surrounded completely by upland landforms and vegetation, are a common feature on the southeastern Coastal Plain. As a group they lack surface connection to perennial streams, ...
    • Laboratory and Modeling Efforts to Refine the use of In Situ Chemical Oxidation for Addressing Residual VOC Plumes on the Savannah River Site 

      Chang, H.; Seaman, John C.; Murphy, T.; Brown, Seth; Mills, G. L. (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      In situ chemical oxidation (ISCO) has been widely used in recent years for the remediation of VOC contaminated soil and groundwater. Among several chemical oxidizing agents injected into the subsurface for ISCO, persulfate ...
    • How Do Precipitation and Irrigated Ratio Interactively Impact Corn Yield? 

      Cai, Ruohong; Bergstrom, John C.; Mullen, Jeffrey D.; Shurley, Don; Wetzstein, Michael (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      In this research, an econometric model has been constructed and estimated to study the relationship between precipitation, irrigated ratio and crop yield. The model was based on the weather and yield data in the southwest ...
    • Distribution, potential spread, and ecological impacts of the invasive apple snail, Pomacea insularum, in Georgia 

      RobertsonShelley; Wilde, S.; Haynie, R.; Herrin, J. (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      Established populations of invasive apple snails have been documented in seven southeastern states, including Georgia. Based on recent morphological and genetic analyses, the invasive apple snails collected in Georgia thus ...
    • Effects of Copper on Amphibians Inhabiting a Constructed Wetland on the Savannah River Site 

      Lance, Stacey L.; Flynn, R. Wesley; Erickson, Matthew R.; Tuberville, Tracey D.; Scott, David E. (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      An artificial wetland system (H-02) was constructed on the Savannah River Site (SRS), South Carolina, to treat process and storm water discharge from an industrial facility. The ability of natural wetlands to improve many ...
    • In-Situ Chemical Oxidation to Address Residual VOC Plumes on the Savannah River Site 

      Seaman, John C.; Kramer, B.; Kupar, J.; Malin, M.; Knapp, P. C. (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      Groundwater plumes containing volatile organic contaminants (VOCs) such as trichloroethylene (TCE) and tetrachloroethylene (PCE) remain a major groundwater remediation challenge at various industrial and governmental ...
    • Making Water Quality Markets Work - Little River Nutrient Bank Case Study 

      Glickauf, Steven; Siragusa, Kelly (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      Major fish kills in the estuaries of North Carolina prompted state officials to enact legislation regulating nutrient runoff from hog farms, other types of agriculture, and urban runoff to help improve water quality in ...
    • An Analysis of the Impact of Local Drought Conditions on Gross Sales in the Lake Hartwell Region 

      Allen, Jeffery S.; Carey, Robert T.; Dickes, Lori A.; Saltzman, Ellen W.; Allen, Corey N.; Mikota , G. Michael (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      Lake Hartwell is a United States Army Corps of Engineers (USACE) impoundment of the Savannah River constructed between 1955 and 1963 as a part of a flood control, navigation and hydropower project on the border of South ...
    • A Comparison of Escherichia Coli Levels in the Chattahoochee River Between Drought and Non-drought Years 

      Jackson, Thomas; Smith, Amanda; McMullan, George; Orear, Ryan; Fuller, Robert; Dalman, Nancy Eufemia (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      The Chattahoochee River in northeastern Georgia is a popular summer recreational site. The section of the river that flows through the city of Helen, about eighty miles northeast of Atlanta, is visited by thousands of ...
    • Life Cycle Comparison of Two RO Concentrate Reduction Technologies 

      Wan, Jing; Gattie, David; Hester, Nathan; Jambeck, Jenna; Li, Ke; Schramski, John (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      Desalination and water reuse technologies are critical for solving water problems. Unlocking water resources through the minimization of reverse osmosis (RO) concentrate volume offers sustainable opportunities to meet the ...
    • Spatial and Temporal Variations in Dissolved P Stream Concentrations for Wet and Dry Years 

      Franklin, Dorcas H.; Steiner, Jean L.; Duke, S. E.; Moriasi, D. N.; Starks, P. J. (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      Dissolved phosphorus (P) has often been identified as the nutrient of concern in lakes, reservoirs, and streams especially where there is evidence of eutrophication. We analyzed contiguous-spatial and temporal variability ...
    • Knife Aeration to Reduce Concentrations of Sex Hormones in Surface Runoff from Pastures Fertilized with Broiler Litter 

      Hassan, Sayed M.; Rema, John; Calvert, Vaughn, II; Cabrera, Miguel L. (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      Broiler litter contains the naturally-excreted hormones testosterone and 17-β estradiol, which can contaminate surface runoff when litter is applied to pastures. This study was conducted to evaluate the effect of ...
    • Coupling Tritium Release Data with Remotely Sensed Precipitation Data to Assess Model Uncertainties 

      Avant, Brian K.; Ignatius, Amber R.; Rasmussen, Todd C.; Grundstein, Andrew J.; Mote, Thomas L.; Shepherd, J. Marshall (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      An accidental tritium release (570 L, 210 TBq) from the K-Reactor at the Savannah River Site (South Carolina, USA) occurred between December 22- 25, 1991. Observed tritium concentrations in rivers and streams, as well as ...
    • Beyond Correlation: the Search for Causal Relationships Between Flow Percentiles and Watershed Variables 

      Ssegane, Herbert; Tollner, E. W.; Mohamoud, Yusuf; Rasmussen, Todd C.; Dowd, John F. (Georgia Institute of TechnologyWarnell School of Forestry and Natural Resources, The University of Georgia, 2011-04)
      The study explored use of causal feature selection algorithms to select dominant watershed variables that drive high, medium, and low flows. A two step approach was implemented. The first step minimized variable redundancy ...