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Imperial River: Water Quality Status and Basin Management Action
Plan
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Imperial River
• WBID 3258EA: Freshwater Imperial River Watershed
• City of Bonita Springs boundary
• Everglades West Coast Basin
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Importance of Good Water Quality
• Supports productive freshwater and coastal ecosystems
• Economics– Tourism– Recreational activities– Marine Industries– Fisheries
• Health• Standard of living
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Impaired Waters
• Sampling coordination• Existing data to develop planning list• Additional data collection and assessment• Verified List• Categorized as Impaired (5) = needs TMDL• 5 year cycle
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TMDL and BMAP Process
Phase 1 Preliminary
Basin Evaluation
Phase 2 Targeted
Monitoring
Phase 3 TMDL
Development
Phase 4BMAP
Development
Phase 5 TMDL
Implementation
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What Does TMDL stand for?
TotalMaximum
DailyLoad
• Establishes the maximum amount of a pollutant that a water body can assimilate and still meet water quality standards
Essentially a “restoration target”
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Imperial River ImpairmentsImperial River
(Marine Segment) Impaired for:
Fecal Coliform Iron DO (Natural
Conditions)
Imperial River TMDL (low DO)
Total Nitrogen reduction 24.87%
TN = 0.74 mg/L
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Basin Management Action Plan
• The Department’s method for restoring water quality of an impaired water body. Implementing the restoration target (TMDL)
• BMAPs are adopted by FDEP through a Secretarial Order
• Includes a plan with a set of strategies• BMAPs are enforceable• 15 year process
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BMAP Process
• Developed collaboratively with local stakeholders
• Open meetings with public involvement
• Joint decision making with local partners
• Counties, Cities, ag interests, environmental interests, community interests and others
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Key BMAP Components
• Identify TMDL(s) being addressed
• Defines area addressed• Details efforts to
implement TMDL• Timeline, commitment,
and benefit
• Includes process to assess progress toward achieving the TMDL• Monitoring, reporting,
follow-up meetings
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Everglades West Coast BMAP
• Adopted December 2012 (TMDL-2008)
• Includes Hendry Creek and Imperial River• Addresses total nitrogen from freshwater
Imperial River watershed• First Phase – 5 years• Stakeholders identify projects that will
reduce TN loading• DEP collecting additional data regarding
nutrient sources
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Multi-agency Effort
• Agriculture• City of Bonita Springs• Lee County• FDOT District 1• FDACS• SFWMD• FDEP
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City of Bonita Springs BMAP projects
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Annual Progress Report
• First annual report now available• Activities and projects that occurred Dec 2012 –
Nov 2013• Water quality monitoring:
• Lee County-14 stations• City of Bonita Springs-7 stations
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New Dissolved Oxygen Criteria
• Previous criteria based on concentration– Freshwater: never < 5.0 mg/L– Marine Water: avg >5.0 mg/L and never < 4.0
mg/L
• New Criteria based on saturation– Freshwater
• No more than 10% of the daily avg percent DO saturation shall be below 38% in the Peninsula or Everglades bioregions
– Marine Waters• No more than 10% of the daily avg percent DO
saturation shall be below 42%
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EWC BMAP: Imperial River
23.1 mi2 watershed
Major tributary to Estero Bay
Urban land uses are within City of Bonita Springs
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