1. Quantity, Timing, and Distribution of Freshwater Flows Into Northeastern Florida Bay

2. Objectives Collect continuous stage, velocity and salinity data at major creeks flowing into northeastern Florida Bay Compute discharge at creeks and study the quantity, timing and distribution of that flow

3. Why is Flow Information Needed? Accurate flow information is needed to help understand the circulation, mixing, and salinity dynamics of Florida Bay and the Everglades Flow data helps quantify nutrient and sediment flux Flow, stage, and salinity data help verify inland simulations of marsh-flow dynamics Performance of management practices

4. Overview Study area –Monitoring sites and feature descriptions –Buttonwood embankment Quantity and Distribution –Methods of acoustic flow measurements –Data from creek monitoring sites –Flow characteristics Timing –Seasonal –Storm events –Management Summary and data availability

5. Study Area

6. Monitoring Sites and Structures ~ 5 miles S18C S175 S197 S332 TSB

7. McCormick Creek Taylor River Upstream Taylor East Creek Western Extent of Study Area ~ 1.5 miles

8. Upstream Taylor Little Madeira Bay Taylor River Buttonwood embankment Taylor River Study Area ~ 0.5 miles

9. Mud Creek Trout Creek Stillwater Creek Joe Bay Central Extent of Study Area ~0.5 miles JB8W JB5C JB2E JB1E

11. Stillwater Creek Oregon Creek West Highway Creek East Highway Creek Eastern Extent of Study Area ~ 1.5 miles

12. Acoustic Doppler Current Profiler (ADCP) Acoustic Velocity Meter (AVM) Side Looking Doppler Quantity of Flow is Measured Using Acoustic Techniques

14. Average Creek Discharge

16. ~ 5 miles S18C S175 S197 S332 TSB

17. Daily Salinity at Trout and McCormick Creeks

18. Percent of Total Measured Discharge at Creeks from 1996 to 1999

19. ~0.5 miles Flow Exchange Between Joe Bay and Long Sound Joe Bay Snag Bay Long Sound Florida Bay

20. 7-1-99 Discharge (cfs) 111 104 53 49 74 569 60 ~0.5 miles

21. 127 131 50 21 324 1090 49 9-24-99 TS Harvey Discharge (cfs) ~0.5 miles

22. 261 170 68 13 479 1880 92 10-19-99 H Irene Discharge (cfs) ~0.5 miles

23. Timing of Flow Seasonal trends Storm events Managed flow

24. Seasonal Timing of Flow Showing Brackish to Fresh Transition at Taylor River

25. Stage at Trout Creek During Storm Events

26. Discharge at Trout Creek During Hurricane Irene

27. Salinity at Trout Creek During Hurricane Irene

28. ~ 5 miles S18C S175 S197 S332 TSB

29. H. Irene H. MitchTS. Josephine El Nino ~

30. Summary Collect continuous stage, velocity and salinity data at major creeks flowing into northeastern Florida Bay and compute creek discharge Accurate information on the quantity, timing, and distribution of flow is needed to help understand the circulation, mixing, and salinity dynamics of Florida Bay and the Everglades; Trout Creek is the major contributor of freshwater flow to northeastern Florida Bay

31. Summary continued Seasonality and storm events drive the timing of flow at the creeks and structures McCormick Creek in the western extent of the study area, shows less connection to inflow from structures and increased salinity during dry periods Flow exchange occurs between Joe Bay and Long Sound and is controlled by water levels in the Taylor Slough and C-111 basin

32. Data Availability Daily values of stage, discharge and salinity available on the SOFIA web page: http://sophia.er.usgs.gov 15 minute data available upon request USGS fact sheet available on the Magnitude and Distribution of Flow into Northeastern Florida Bay