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Florida Lake Management Society Annual Conference, Naples, Florida, June 4 – 7, 2007

Shallow Groundwater Nutrient Dynamics in the Lower St. Johns River Basin

Ying Ouyang St. Johns River Water Management District Palatka, FL

Characterization of shallow groundwater nutrient dynamics in the Lower St. Johns River Basin (LSJRB), Florida is crucial to evaluation of groundwater pollution and to understanding of its potential adverse environmental impacts upon the LSJR water quality. The objectives of this study were to: (1) evaluate shallow groundwater nutrient contamination status in the septic tank land use areas using field sampling data and US-EPA’s water quality criteria; (2) determine the site and seasonal variations of the shallow groundwater nutrients; and (3) identify the relationships between the shallow groundwater nutrients and the land use conditions using Piper (e.g., trilinear) plots. Results and suggestions from this study will be presented and discussed.

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NOTES

Session 8B – Page 2

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