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Flatford Swamp Hydrologic Restoration Feasibility Study (H089)

Flatford Swamp Hydrologic Restoration Feasibility Study (H089). Flatford Swamp. Flatford Hydrologic Restoration. How much excess water? How to remove it from the swamp? What to do with it once the flow is removed?. How to R emove E xcess W ater from the S wamp? 1 . Interception of flow.

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Flatford Swamp Hydrologic Restoration Feasibility Study (H089)

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  1. Flatford Swamp Hydrologic Restoration Feasibility Study (H089)

  2. Flatford Swamp

  3. Flatford Hydrologic Restoration How much excess water? How to remove it from the swamp? What to do with it once the flow is removed?

  4. How to Remove Excess Water from the Swamp?1. Interception of flow

  5. To Manatee County To Mosaic

  6. To Mosaic

  7. Three Areas of Interrelated Activities Supply Timing and Delivery Storage Options Water Quality and Treatment Options

  8. The Project Site B Site A Flatford Swamp

  9. Analysis Method for Timing of Flows and Storage Performance Simplified Reservoir Routing Model Daily Inflows, Rainfall and PET Provided by Interflow, LLC, 2011 Existing Landuse Conditions Used Extended Period of Record (16 years) Model Currently Includes All Parameters Except Seepage May Include It Later with Refined Siting Information Outputs are Daily, Monthly and Annual

  10. Existing Land Use Scenario Proposed Removal of Average Excess Flows (cfs)(Data reproduced from Table 3.1 – November 11, 2011 Interflow report)

  11. Factors Affecting StorageVolume Variability of Inflows and Delivery Limits Water Quality and Treatment Requirements Storage Type and Design Criteria Operational Considerations

  12. Three Alternatives Investigated • Alternative 1: No Storage • Alternative 2: Excavated Storage • Alternative 3: Elevated Storage • All Accomplish Flatford Swamp Diversion Objectives per MRWI Conceptual Plan • All Evaluations Use 20 cfs Limit on Flows Delivered to Mosaic

  13. Water Quality and Treatment

  14. Water Quality Evaluation Surface Water Sources Coker Creek Ogleby Creek Maple Creek Myakka River

  15. Water Quality Evaluation Period of Record (1990s to 2011) Recent SWFWMD Data (2009 to 2011) Samples collected quarterly Seasonal Variability Evaluation (2008, FDEP Data) Tributaries to Myakka River Samples collected monthly

  16. Sulfate (mg/L) – Seasonal Variability

  17. Total Organic Carbon (mg/L) – Seasonal Variability

  18. Water Quality and Treatment Myakka River Has Better Overall Water Quality Than Tributaries 2008 FDEP Water Quality Data Sulfates, conductivity readings– higher in dry season TOC concentration – lower in dry season May Develop Water Quality Indicator Based on USGS Conductivity Values Treatment Technology Exists to Accommodate Seasonal Water Quality Variability

  19. Mosaic Water Quality Phosphate Beneficiation Process is Affected by Elevated Levels of Calcium and Magnesium

  20. Future Project Tasks Alternative Refinements and Costs Regulatory Review Final Report Due December 2012

  21. Questions?

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