Full TGIF Record # 234155
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Web URL(s):http://onlinelibrary.wiley.com/doi/10.1111/j.1752-1688.2004.tb01055.x/pdf
    Last checked: 12/12/2013
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    Access conditions: Item is within a limited-access website
Publication Type:
Author(s):Mytyk, Nicole R.; Delfino, Joseph J.
Author Affiliation:Mytyk: Graduate Student; Delfino: Professor, Department of Environmental Engineering Sciences, University of Florida, Gainesville, Florida
Title:Evaluation of nitrate data in the Ocklawaha River Basin, Florida (1953-2002)
Source:Journal of the American Water Resources Association/AWRA. Vol. 40, No. 4, August 2004, p. 913-924.
# of Pages:12
Publishing Information:Minneapolis, Minnesota: American Water Resources Association
Related Web URL:http://onlinelibrary.wiley.com/doi/10.1111/j.1752-1688.2004.tb01055.x/abstract
    Last checked: 12/12/2013
    Notes: Abstract only
Keywords:TIC Keywords: Data; GIS; Nitrates; Surface runoff; Water quality
Abstract/Contents:"Nitrate levels in the Ocklawaha River Basin in north central Florida were reviewed over a 50-year period. Data were obtained from the literature, U.S. Environmental Protection Agency (USEPA) STOrage and RETrieval (STORET), and U.S. Geological Survey (USGS) databases. The study objective was to determine whether nitrate concentrations are increasing and if so, whether this increase is linked to land use changes. Increasing nitrate levels were seen at 5 of the 14 stations, while other stations showed no trend or a decreasing trend. Median nitrate concentrations in the Ocklawaha River increased from 0.07 mg-N/L to 0.78 mg-N/L at sites downstream from the Silver River. Throughout the Rodman Reservoir, median nitrate concentrations decreased from 0.48 mg-N/L to 0.01 mg-N/L and increased to 0.04 mg-N/L after the Kirkpatrick Dam. Flow and concentration relationships were correlated for five stations. At four of the five stations nitrate concentrations decreased in response to increasing flow, likely the result of dilution with nitrate poor water. Changes in land use over a 20- year period (1970 to 1990) also were monitored. Sources of nitrate have been linked by isotopic analysis to organic and inorganic fertilizers, which appear to be related to increased urbanization and an increase in lawns that require nutrient fertilization."
Note:Maps, "Selected Ocklawaha River Site Locations and Drainage Subbasins"
Geographic Terms:Ocklawaha River Basin, Florida
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Mytyk, N. R., and J. J. Delfino. 2004. Evaluation of nitrate data in the Ocklawaha River Basin, Florida (1953-2002). Water Resour. Bull. 40(4):p. 913-924.
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DOI: 10.1111/j.1752-1688.2004.tb01055.x
Web URL(s):
    Last checked: 12/12/2013
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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MSU catalog number: b2206946~S1a
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