1. 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

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

5. Floridan Aquifer System

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

8. Sinking Streams

10. Underwater Caves

12. Springs

13. Floridan Aquifer System Confined Unconfined

14. Aquifer Vulnerability

15. Physiographic Provinces Cody Scarp

17. Karst Features

18. Water Movement Provide by Karst Productions

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

20. Surfacewater Quality Monitoring Network

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

23. High/Low Flow High/Low Flow Nitrate-N 00.20.40.60.811.21.4 S.R. at Gopher R. Fowler's Bluff Wilcox Rock Bluff Branford Luraville Dowling Park Ellaville S.R. Above Withla. Suw.Springs White Spring S.R. at SR 6 NOx-N (mg/L) June 1998 (Low) March 1998 (High) Georgia Gulf of Mexico

24. Troy Springs First Magnitude 0 0.5 1 1.5 2 2.5 3 Nov-60 Oct-73 Nov-92 Jun-93 Jul-93 Aug-93 Sep-93 Jun-94 Sep-94 Jun-95 Jul-95 Aug-95 Sep-95 Jun-96 Jul-96 Aug-96 Jun-97 Jul-97 Sep-97 Jun-98 Jul-98 Aug-98 NOx-N (mg/L) USGSFGSSRWMD

25. WARN - Groundwater Quality Network Trend Wells Status Wells

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

29. 0 5,000,000 10,000,000 15,000,000 20,000,000 25,000,000 30,000,000 Suw Laf Gil Ala Col Union Mad Levy Jef Brad Ham Taylor Dixie Pounds of N per Year 29 14 13 11 9 8 77 6 5 4 3 3 Estimated Annual Nitrogen Inputs SRWMD

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

31. Example

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

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

34. Groundwater Domains

35. Spring and Inner Basin Groundwater Quality

36. 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.

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