SLIDE 1
Outline
- Final Report Draft summary
– Revised Draft Report – submitted to SFWMD March 2019
- Proposed Master Permit SOW2020-2025
Research Update BMP Workshop and Training April 24, 2019 Samira - - PowerPoint PPT Presentation
Research Update BMP Workshop and Training April 24, 2019 Samira - - PowerPoint PPT Presentation
Floating Aquatic Vegetation Impact on Farm Phosphorus Load: Research Update BMP Workshop and Training April 24, 2019 Samira Daroub Timothy Lang Andres Rodriguez Everglades Research and Education Center Outline Final Report Draft summary
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2501 0401 4702 4701 3102 3103 1813 6117
FAV Project Update
Methods
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Hypothesis
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Objective:
- Determine impact of FAV suppression on P
concentrations/ loads and Sediment properties. The two management practices Control: FAV cover is managed by the growers and is representative of typical FAV control practices in the region. Treatment: Aggressive control of FAV through spot spraying with approved aquatic herbicide as to keep farm canals at
- r below 25% vegetation coverage.
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Farm Paired Design: Methods
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Paired-Farm Comparison: Farm 4701/4702
Followed experimental design (FAV coverage)
20 40 60 80 100 5/1/11 9/1/11 1/1/12 5/1/12 9/1/12 1/1/13 5/1/13 9/1/13 1/1/14 5/1/14 9/1/14 1/1/15 5/1/15 9/1/15 1/1/16 5/1/16 9/1/16 1/1/17 5/1/17 9/1/17 1/1/18
b) 4701 (C) Percent FAV Coverage
FAV % 25 % Cover
20 40 60 80 100
a) 4702 (T) Percent FAV Coverage
FAV % 25 % Cover
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Paired-Farm Comparison: 4701/4702
y = 0.5934x + 0.0313 R² = 0.3592 y = 0.2663x + 0.054 R² = 0.193 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.00 0.10 0.20 0.30 0.40 0.50 DRAINAGE 4702 (Mgal/A) DRAINAGE 4701 (Mgal/A)
Monthly UAD
Calibration Treatment y = 0.2066x + 0.0619 R² = 0.0148 y = 0.1016x + 0.078 R² = 0.0463 0.00 0.05 0.10 0.15 0.20 0.25 0.00 0.05 0.10 0.15 0.20 0.25 FWTP 4702 (mg/L) FWTP 4701 (mg/L)
Monthly FWTP
Calibration Treatment
y = 1.1077x + 0.0054 R² = 0.5108 y = 0.3221x + 0.0149 R² = 0.2284 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 UAL 4702 (kg/L) UAL 4701 (kg/L)
Monthly UAL
Calibration Treatment
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Sediment Properties
- Total P in
sediments was higher in 4701- high FAV growth
- Bulk Density (BD)
- f sediments
was higher in 4702 (T), meaning the generation of heavier sediments
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Paired-Farm Comparison: 3102/3103
20 40 60 80 100
a) 3103 (T) Percent FAV Coverage
FAV % 25 % Cover
20 40 60 80 100
b) 3102 (C) Percent FAV Coverage
FAV % 25 % Cover
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Paired-Farm Comparison: 3102/3103
y = 1.1704x + 0.064 R² = 0.7441 y = 0.9141x + 0.0794 R² = 0.593 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 DRAINAGE 3103 (Mgal/A) DRAINAGE 3102 (Mgal/A)
Monthly UAD
Calibration Treatment y = 0.4518x + 0.1328 R² = 0.2882 y = 0.6671x + 0.057 R² = 0.3336 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 FWTP 3103 (mg/L) FWTP 3102 (mg/L)
Monthly FWTP
Calibration Treatment
y = 1.2393x + 0.0364 R² = 0.7898 y = 0.9208x + 0.0526 R² = 0.7477 0.00 0.20 0.40 0.60 0.80 1.00 1.20 0.00 0.20 0.40 0.60 0.80 1.00 1.20 UAL 3103 (kg/A) UAL 3102 (kg/A)
Monthly UAL
Calibration Treatment
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P speciation: 3102/3103
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Summary:
- Drainage is often the dominant variable for UAL
- Two farm pairs showed impact of controlling FAV
- Each farm had site specific properties that
influenced P concentrations and loads.
- Recommendation is farm specific for impact of
managing FAV on water quality.
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