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Everglades Agricultural Area BMP Replacement Water Chapter 40E-63, F.A.C, Part II

Everglades Agricultural Area BMP Replacement Water Chapter 40E-63, F.A.C, Part II. Rule Development Public Workshop August 28, 2006. Rule Development. Consensus among interested stakeholders and District staff that BMP Replacement Water should be re-visited

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Everglades Agricultural Area BMP Replacement Water Chapter 40E-63, F.A.C, Part II

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  1. Everglades Agricultural AreaBMP Replacement WaterChapter 40E-63, F.A.C, Part II Rule Development Public Workshop August 28, 2006

  2. Rule Development • Consensus among interested stakeholders and District staff that BMP Replacement Water should be re-visited • July 2006, authorization to enter into Rule Development was provided by District Governing Board to amend the EAA replacement water methodology

  3. EAA BMP Replacement Water • Required by 1994 Everglades Forever Actand EvergladesSettlement Agreement • Everglades Hydroperiod Restoration & Improvement Component • Runoff water from EAA would be lost due to BMP implementation

  4. Original EAA BMP Assumption • Water retention in EAA due to implementation of BMPs would equal 20% of total base flow that was discharged from the EAA from 1979 through 1988 (pre-BMP period) pre-BMP post-BMP

  5. EFA Mandate • Replace reductions of flow to EPA from BMP implementation • Develop a model for quantifying the amount of water to be replaced • Distribution and timing of replacement water should maximize natural balance of EPA

  6. Replacement Water Implementation • The District implemented a BMP Replacement Water rule under Chapter 40E-63, part II (F.A.C) to carry out the EFA requirement • Effective since 1995 • Minor changes since then to add new EAA structures

  7. EAA Runoff Trend • Pre-BMP Period • Higher Variability • Post-BMP Period • Reduced Variability • Higher Average Runoff

  8. Runoff Conveyance Changes • Increase in EAA Runoff Directed to the EPA • Decrease in EAA Runoff Directed to Lake Okeechobee

  9. Replacement Water EstimatesCurrent Modeling Method • Runoff Reduction • Observed < Predicted • Chart values > 0 • Runoff Increase • Observed > Predicted • Chart values < 0

  10. Reason for Rule Amendments • Runoff Trend • Long-Term analysis of rainfall and flow data from the EAA collected between 1965 and 2000 indicates no reduction in flow since BMP implementation • Conveyance Changes • More EAA runoff is being directed south to EPA

  11. Reason for Amendments (cont’d) • Concern over competing demands on Lake Okeechobee; do not want to overestimate demands • Concern over Lake Okeechobee water quality and its use as makeup water in EPA

  12. Goal of Rule Amendments • Modify model (rule) to more accurately reflect post BMP conditions • Ensure that model can also account for EAA Reservoir Project changes to system and selected Regional Feasibility Study Alternative

  13. Additional Information • Technical Contact: Stuart Van Horn, • 561-686-8800 (x6628), svanhorn@sfwmd.gov • Rule Procedural Questions: Joyce Rader, • 561-686-8800 (x6259), jrader@sfwmd.gov • Visit the SFWMD Rulemaking website at • http://www.sfwmd.gov • Go to: What We Do => Permitting => Rules, Statutes, & Criteria => Rulemaking

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