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Objectives

Distribution and Occurrence of Nitrate-Nitrogen and Total Phosphorus in the Water Resources of the Suwannee River Water Management District David Hornsby Dissertation Proposal May 27 th , 2005. Objectives.

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Objectives

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  1. Distribution and Occurrence of Nitrate-Nitrogen and Total Phosphorus in the Water Resources of the Suwannee River Water Management DistrictDavid HornsbyDissertation ProposalMay 27th, 2005

  2. Objectives • To determine the distribution and occurrences of nitrate-N and total phosphorus in the SRWMD • Define the influence on water quality and quantity due to the interaction of ground and surface water in the Suwannee River basin • Define ground water basins in the SRWMD • Integration of the findings with landuse/landcover to assess influence on water quality

  3. Hypothesis • Impacts on the occurrence and distribution of nitrate-N and total phosphorus in the water resources of the Suwannee River Water Management District can be attributed to landuse/landcover

  4. Floridan Aquifer System

  5. Karst • Terrain formed by the dissolution of underlying limestone • Internal Drainage: SW=GW • Characterized by caves, caverns, sinkholes, sinking streams, springs, etc.

  6. Sinking Streams

  7. Underwater Caves

  8. Springs

  9. Floridan Aquifer System Confined Unconfined

  10. Aquifer Vulnerability

  11. Physiographic Provinces Cody Scarp

  12. Karst Features

  13. Water Movement Provide by Karst Productions

  14. Suwannee River Basin Georgia Florida Total Area 9,950 Square Miles

  15. Surfacewater Quality Monitoring Network

  16. Nitrate-N Trends • Suwannee River Increasing trend for Nitrate-N concentration in Suwannee River at Branford, Florida • Santa Fe River Data from the Surfacewater Quality Monitoring shows an increase in Nitrate-N concentrations in the Lower Santa Fe River

  17. March 1998 (High) June 1998 (Low) S.R. at SR 6 White Spring Suw.Springs S.R. Above Withla. Ellaville Dowling Park Luraville Branford Rock Bluff Wilcox Fowler's Bluff S.R. at Gopher R. High/Low FlowNitrate-N Georgia 0 0.2 0.4 0.6 0.8 1 1.2 1.4 Gulf of Mexico NOx-N (mg/L)

  18. FGS USGS SRWMD Troy SpringsFirst Magnitude 3 2.5 2 NOx-N (mg/L) 1.5 1 0.5 0 Jul-93 Jul-95 Jul-97 Jul-98 Jul-96 Oct-73 Jun-94 Jun-95 Jun-93 Jun-96 Jun-97 Jun-98 Sep-95 Sep-97 Sep-94 Nov-92 Nov-60 Aug-96 Aug-93 Aug-95 Aug-98 Sep-93

  19. Trend Wells Status Wells WARN - Groundwater Quality Network

  20. 23.8% 23.7% 12.2% 18.5% 0.8% 54.1% -1.6% -10.0% 34.4% 10.8% 15.5% 5.9% 0.7% 8.9% -4.6% -8.3% 18.9% -3.7% SuwanneeBasinNitrate-N and TPLoadsByBasin Total Loadings for Water year 2003 4,485 tons Nitrate-N 1,627 tons TP

  21. 29 14 13 11 9 8 7 7 6 5 4 3 3 Estimated Annual Nitrogen InputsSRWMD 30,000,000 25,000,000 20,000,000 15,000,000 Pounds of N per Year 10,000,000 5,000,000 0 Gil Laf Col Ala Mad Jef Ham Union Levy Brad Suw Dixie Taylor

  22. Atmospheric Beef Cows 4.8% 5.8% Dairy Cows 5.4% Poultry 34.1% Fertilizer 48.9% People 1.0% Estimated Nitrogen InputsSuwannee County Total 28,992,636 pounds of N

  23. Example

  24. Columbia Baker Suwannee Union 1995 Potentiometric Surface Map 50 40 30 70 20 60 10

  25. Potentiometric Surface September 2002 50 45 40 35 30 25 20 15

  26. Groundwater Domains

  27. Spring and Inner Basin Groundwater Quality

  28. Outcomes/Products • Temporal and spatial distribution of nitrate-N and total phosphorus. • GIS coverage of groundwater basins with landuse/landcover. • A comparison of water quality to landuse/landcover by groundwater basin. • A correlation of landuse/landcover in groundwater basins to water quality. • Impacts of landuse/landcover on the ground and surface water quality in the middle Suwannee and lower Santa Fe rivers. • Develop a ranking of landuse/landcover to ground and surface water quality.

  29. Acknowledgments • Committee • Dr. Donald Graetz (Chair) • Dr. Tom Obreza • Dr. Vimala Nair • Dr. Wendy Graham • Assistance • Suwannee River Water Management District

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