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?