Post on 31-Mar-2015
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 DevelopmentPublic Workshop
August 28, 2006
Rule DevelopmentPublic Workshop
August 28, 2006
Rule DevelopmentRule 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
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
EAA BMP Replacement WaterEAA 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
Required by 1994 Everglades Forever Actand EvergladesSettlement Agreement
Everglades Hydroperiod Restoration & Improvement Component
Runoff water from EAA would be lost due to BMP implementation
Original EAA BMP Assumption
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)
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)
May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr
pre-BMP post-BMP
EFA MandateEFA 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
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
Replacement Water Implementation
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
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
EAA Runoff TrendEAA Runoff Trend
0
200
400
600
800
1,000
1,200
1,400
1,600
1,800
2,000
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
Water Year (Oct. 1st to Sept. 30th)
Ru
no
ff (
kac-
ft)
post-BMP Average(1,128 kac-ft)
pre-BMP Average (baseline)(1,029 kac-ft) Pre-BMP Period
Higher Variability
Post-BMP Period Reduced Variability Higher Average
Runoff
Pre-BMP Period Higher Variability
Post-BMP Period Reduced Variability Higher Average
Runoff
Runoff Conveyance Changes
Runoff Conveyance Changes
Percentage of EAA Runoff Flowing South to EPA
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
Water Year (Oct. 1st to Sept. 30th)
post-BMP Average(94%)
pre-BMP Average (baseline)(85%
Increase in EAA Runoff Directed to the EPA
Decrease in EAA Runoff Directed to Lake Okeechobee
Increase in EAA Runoff Directed to the EPA
Decrease in EAA Runoff Directed to Lake Okeechobee
Replacement Water EstimatesCurrent Modeling Method
Replacement Water EstimatesCurrent Modeling Method
EAA Runoff Percent Reductions
-60%
-50%
-40%
-30%
-20%
-10%
0%
10%
20%
30%
40%
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
Water Year (Oct. 1st to Sept. 30th)
Red
uct
ion
(%)
Yearly Percent Reductions 5 Year Percent Reductions
Runoff Reduction Observed < Predicted Chart values > 0
Runoff Increase Observed > Predicted Chart values < 0
Runoff Reduction Observed < Predicted Chart values > 0
Runoff Increase Observed > Predicted Chart values < 0
Reason for Rule Amendments
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
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
Reason for Amendments (cont’d)
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
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
Goal of Rule AmendmentsGoal 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
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
Additional InformationAdditional 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
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