Flatford Swamp Hydrologic Restoration Feasibility Study (H089)
How much excess water? How to remove it from the swamp? What to do with it once the flow is removed?
To Mosaic To Manatee County
To Mosaic
Supply Timing and Delivery Storage Options Water Quality and Treatment Options
Site B Site A Flatford Swamp
Simplified Reservoir Routing Model Daily Inflows, Rainfall and PET o Provided by Interflow, LLC, 2011 o Existing Landuse Conditions o Used Extended Period of Record (16 years) Model Currently Includes All Parameters Except Seepage o May Include It Later with Refined Siting Information Outputs are Daily, Monthly and Annual
Variability of Inflows and Delivery Limits Water Quality and Treatment Requirements Storage Type and Design Criteria Operational Considerations
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
Water Quality and Treatment
Surface Water Sources Coker Creek Ogleby Creek Maple Creek Myakka River
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
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
Phosphate Beneficiation Process is Affected by Elevated Levels of Calcium and Magnesium
Alternative Refinements and Costs Regulatory Review Final Report Due December 2012