Everglades Agricultural Area (EAA) Water Year 2013 Data
Douglas Pescatore, Scientist 4 Everglades Regulation Bureau South Florida Water Management District IFAS BMP Training September 26, 2013
Presentation Highlights
I. EAA Basin Phosphorus Load Performance
II. EAA Basin Performance Relation to Farm Data
III. Farm Data Importance
I. EAA Basin Performance Overview
EAA Basin Runoff is a calculation of flows and phosphorus load leaving the EAA as a result of local EAA discharge
EAA Basin Compliance is based upon the entire EAA Basin runoff load vs. predicted runoff load • Base Period loading (WY80-WY88)
• Adjusted for rainfall
• Reduced by 25%
I. Runoff Calculation
Outflows minus “other source” inflows minus “pass through” inflows • “other source” inflows from Diversion Areas and
C-139 Basin
• Inflows from Lake O. can be either irrigation or “pass through”
• Irrigation is not part of the EAA Basin Runoff Calculation
I. EAA Map of Inflows and Outflows
I. EAA Basin Historical Performance
Highlights WY11: Highest
(79%) reduction for the period WY07: Lowest
(18%) reduction since full BMP implementation 18 year overall
reduction is 55%
I. Water Year 2013
Annual Rainfall = 53.55 inches (5th)
Annual Flow = 883.6 kac-ft (11th)
Annual Load = 154.4 mton (6th)
FWM TP Conc. = 141 ppb (2nd)
WY13 Reduction = 41% (14th)
Ranking from highest to lowest – WY96 to WY13
I. Comparison: WY13 to WY97-98
WY97 and WY98 are the 6th and 4th ranked years for Annual Rainfall
WY98 WY13 WY97
Rainfall (in) 56.12 53.55 52.02 Flow (in) 28.3 22.7 22.8 Load (lbs/acre) 0.679 0.726 0.515 FWM TP Conc. 102 ppb 141 ppb 100 ppb WY Reduction 34% 41% 49% Predicted Load 1.027
lbs/acre 1.236
lbs/acre 1.012
lbs/acre
I. Monthly Characteristics of WY13 Rainfall Percentages (%)
Aug. and Sept.
August
WY13 34% 23% WY96-WY13 Average 30% 16% Flow Percentages (%) Aug. and
Sept. August
WY13 49% 22% WY96-WY13 Average 35% 17% Load Percentages (%) Aug. and
Sept. August
WY13 70% 33%
WY96-WY13 Average 40% 19%
II. Farm Data and EAA Runoff (WY13)
The majority of discharges from farm structures do result in EAA Basin Runoff
Farm Discharge Loads that do not result in EAA Basin Runoff may be the result of: • Water may be recycled when drawn in as irrigation
• Phosphorus may be attenuated through natural processes within the EAA Canals
II. Comparison of Daily Farm Discharge to Calculated EAA Runoff (WY13) - Flow
II. Comparison of Daily Farm Discharge to Calculated EAA Runoff (WY13) - Load
III. Farm Data Importance
Farm Data can validate EAA Basin Runoff compliance data
Farm Data will be used to determine secondary compliance if the EAA Basin does not meet (primary) compliance
Levels and trends help indicate effectiveness of BMP implementation on an individual farm
III. Farm Data Processing
Processing of Farm Data is time intensive
QA/QC of Farm Data for WY13 before the Farm Scale Model Results were published was more Successful than previous years because…..
All of the Data Providers Submitted their Data on-time this year!!!!
Conclusion
The EAA has been in compliance for 18 years and has had a 55% reduction over that period
The farm data serves as a complement to the EAA Basin level data and runoff results
Submitting data in a timely manner throughout the year will lead to less errors
Questions?
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