Originator: Steven H. Douglas
Attenuation Factor model results for Upper Floridan aquifer vulnerability to Bromacil and Ethylene Dibromide
Geospatial_Data_Presentation_Form: raster digital data
Series_Name: U.S. Geological Survey Data Release
Publication_Place: St. Petersburg, FL
Publisher: U.S. Geological Survey
This dataset includes Attenuation Factor (AF; Rao and others, 1985) model results for Upper Floridan aquifer vulnerability to Bromacil and 1,2-Dibromoethane or Ethylene Dibromide (EDB). The AF value serves as an index for assessing the transport of pesticide mass from the vadose zone. The AF model setup requires the input of raster soil bulk density, soil organic carbon content, soil field capacity, soil air filled porosity, recharge to the aquifer, depth to groundwater, the pesticide sorption coefficient, pesticide Henry's Law Constant, and pesticide half-life. These variables were entered into the AF equation using the raster calculator tool in ArcGIS. The resulting AF values are dimensionless and range between 0 and 1. A value of 1 indicates that all of the pesticides in the vadose zone will leach into the groundwater; conversely, a value of 0 suggests that no pesticides will leach into the groundwater.
This dataset was generated from the Attenuation Factor model to test the model's ability to indicate groundwater vulnerability to pesticides in the Southwest Florida Water Management District (SWFWMD).
A downloadable version of the final dataset is provided in GeoTIFF file format with 10-meter resolution.
Currentness_Reference: publication date
Maintenance_and_Update_Frequency: None planned
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: Attenuation Factor
Theme_Keyword: raster dataset
Theme_Keyword: Southwest Florida Water Management District
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: University of South Florida St. Petersburg
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: water quality
Theme_Keyword: water resources
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
Cherokee Nation Technologies contracted to the U.S. Geological Survey
Contact_Person: Steven H. Douglas
Address_Type: physical and mailing address
Address: 600 4th St S
City: St. Petersburg
U.S. Geological Survey and University of South Florida St. Petersburg
Microsoft Windows 7 Version 6.1 (Build 7601) Service pack 1; Esri ArcGIS 10.2
Originator: Rao, P.S.C., Hornsby, A.G., and Jesup, R.E.
Indices for ranking the potential for pesticide contamination of groundwater
Edition: 44, 1-8
Publisher: Proceedings of the Soil and Crop Science Society of Florida
Originator: Douglas, S., Dixon, B., and Griffin, D.
Assessing intrinsic and specific vulnerability models ability to indicate groundwater vulnerability to groups of similar pesticides: a comparative study
Publication_Place: Philadelphia, PA
Publisher: Physical Geography