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PresentersBasin-Specific Feasibility Studies
Presentation to EAA Storage Reservoirs Phase 1 Project Development Team
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Background
Basin-Specific Feasibility Studies for the ECP Basins Completed October 2002
Objective Was to Evaluate Alternatives for Achieving EFA Long-term Water Quality Improvement Goals
Included Alternatives for STA-2, STA-3/4, STA-5 and STA-6
All Potentially Affected by EAA Storage Reservoirs Projects
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Background
Proper Evaluation Required Assessment of Potential Influence of EAA Storage Reservoirs on STA Operation and Performance
Necessary to Conduct Assessment in Advance of Full Definition of the Probable Nature of the EAA Storage Reservoirs by CERP PDTs
Assessment for 50 Year Period 2007-2056
Required Consideration of both Phase 1 and Phase 2 Storage Reservoir Projects
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Background
Initial Assessment for Each STA Based on Results of SFWMM Simulation 2050wPROJ
Simulation Prepared for the Specific Purpose of the BSFS
Structured to Parallel as Closely as Possible Restudy Alternative D13R, Modified to Reflect One Possible Arrangement for Use of Lands Acquired in the Talisman Land Exchange (plus an additional approx. 10,000 acres for consistency with total 60,000 acres used in Restudy)
Included Assumptions Which May or May Not Be Consistent With CERP Goals and Objectives
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Background
BSFS for ECP Basins Also Included Development and Evaluation of One Integrated Alternative for STA-2, STA-3/4, STA-5 and STA-6 In Which the Assumed Design and Operation of the EAA Storage Reservoirs Projects Were Altered Substantially
Only One of Many Possible Alternative Configurations
Conducted For the Sole Purpose of Assessing Potential Influence on Water Quality Improvement Strategies
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Principal Conclusion
It Does Appear Possible to Develop the EAA Storage Reservoirs Projects to Contribute to Overall Water Quality Improvement Strategies Without:
Sacrificing or Impairing the Hydrologic Functions of the Reservoirs
Increasing the Probable Cost of the Reservoirs
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
A Cautionary Note
The Integrated Alternative considered in the BSFS cannot be considered as an optimized solution. The interrelationships of the various STAs and the Reservoirs are highly complex. A wide variety of alternatives should be postulated and considered in detail. Time and budget restraints inherent in the scope of the BSFS studies permitted the development of but one of the many possible adjustments which could be made.
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Suggestions...
For enhanced performance of the Reservoirs in meeting WQ objectives, consider:
Minimize Frequency and Duration of Dryout
Discharge WQ Improves as Depth Increases
Total Loads Discharged to STAs Reduce as the Proportion of Total Inflows First Directed to Reservoirs Increase
Atmospheric Inputs to and ET Losses From Reservoirs Increase as Surface Area Increases
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
…Lead To...
Favor the Development of Deeper Reservoirs With Less Surface Area, to Which the Maximum Proportion of Total Basin Inflows are Directed, and in Which Strict Partitioning of Inflows by Source and Destination is Reduced.
Can Concurrently Simplify the Design and Operation of the Reservoirs, With Attendant Beneficial Impact on Capital and O&M Costs
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Possible Strategies
In Lieu of Compartmentalization, Consider Allocation of Storage Based On Depth in the Reservoir(s)
Reduces Total Length of Impoundment Levees, But Increases Height
Reduces Number and Total Installed Hydraulic Capacity of Pumping Stations and Other Water Control Structures
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Possible Strategies
Maximize Use of Water Control Infrastructure Now Existing or Under Construction
Example: Consider Use of G-370 & G-372 as Reservoir Inflow Pumping Stations
Maximizes STA-3/4 Inflows First Directed to Reservoir(s), Minimizes Loads Discharged to STA-3/4
Reduces Duplication of Installed Pumping Capacity
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Possible Strategies
Expand Number of Sources From Which Runoff is Introduced to Reservoirs. Possibilities Include:
Miami Canal and NNR Canal Inflows Now Simulated as Direct Inflows to STA-3/4
C-139 Basin and C-139 Annex
Hillsboro Canal Inflows Now Simulated as Direct Inflows to STA-2
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Possible Strategies
Direct Discharges from the Reservoir(s) to STAs in Proportion to Their Assimilative Capacity (e.g., Attempt to “Balance” Reservoir Discharges with Downstream Treatment Capacity)
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Alternatives Considered
Modified Design and Operation
Reduced Number of Compartments
Will Discuss Both, But First, Some Limitations...
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Limitations
Simulation Considers Entire CERP Complete (Both Phase 1 and Phase 2 of the EAA Reservoirs Project, North of Lake Okeechobee Storage, All ASR Projects)
Need a Simulation for Conditions Expected Upon Completion of EAA Storage Reservoirs Phase 1
Modeling for TP Reduction in Reservoirs an Initial Approximation
Needs More Detailed Consideration
Again, Only One Integrated Alternative Considered - We Believe It Can Be Substantially Improved Upon
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
2050wPROJ Simulation
EAA Reservoir Modeled in 4 Components, 3 Hydraulically Linked to STA-3/4
A1 - Runoff from NNR & Miami Canal Basins
A2 - Overflows from A1, & L.O.R.R.
B - Overflows from A2, and L.O.R.R.
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
2050wPROJ Simulation
Inflows Limited to Lake Okeechobee Regulatory Releases Exceeding Modeled Storage Capacity in Other Compartments
No Discharge to Adjacent STA-5 (Treats C-139 Basin Only)
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
2050wPROJ Simulation
Total Surface Area of 60,000 Acres
Average Annual Inflow Volume 507,000 Acre-Feet
Depth Ranges From 3.4 ft. Below to 8.1 ft. Above Ground
RESERVOIR OPERATIONS SUMMARY
Max. Depth (ft)
Min. Depth (ft)
Ave. Depth (ft.)*
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
2050wPROJ Simulation
Average Annual Inflow Volume to STAs of 1,045,000 Acre-Feet
Average Annual Inflow TP Load to STAs of 123.3 Tonnes (96 ppb)
*TP loads estimated using information presented in the Baseline Data Report (Goforth & Piccone, 2001)
ESTIMATED AVERAGE ANNUAL STA INFLOWS
Receiving STA
Volume (ac-ft)
2050wPROJ Simulation
Six New Pumping Stations, Total Installed Capacity of 16,875 cfs
Eight New Spillways, Total Installed Capacity of 14,464 cfs
SUMMARY OF NEW WATER CONTROL STRUCTURES
Structure Type
Pumping Station
NNR Canal
Compartment A1
Spillway
Spillway
Spillway
Pumping Station
Miami Canal
Compartment A2
Pumping Station
NNR Canal
Compartment A2
Spillway
Spillway
1,376
Irrigation Release from A2 to NNR Canal; also for Overflow from A2 to NNR Canal for Comp. B
Spillway
Pumping Station
NNR Canal
Compartment B
3,375
Lake Okeechobee Regulatory Release to B; also Compartment A2 Overflow from NNR Canal
Spillway
Pumping Station
Miami Canal
Compartment C
Spillway
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Integrated Alternative
Integrated Alternative
Basic Goal - Improve Water Quality Performance Without Impacting Hydrologic Performance
Basic Measure - Meet Simulated Water Supply Demands (Both to STAs for Environment and to EAA for Irrigation) on a Daily Basis for Entire 31-Year Period of Simulation, While Avoiding Dryout
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Integrated Alternative
Component A
Modeled to Receive All Lake Okeechobee Regulatory Releases Originally Simulated As Directed to Compartments A2 and B
Modeled to Satisfy All Water Supply Demands Simulated to Be Met From Compartments A1, A2 and B
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Integrated Alternative
Component B
All Discharges Directed to STA-2
Depth Limited to Permit Use of Existing Pumping Station S-6 As Inflow Pumping Station
No Lake Regulatory Releases, No Water Supply Releases
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Integrated Alternative
Component C
Modeled to Receive Simulated Lake Okeechobee Regulatory Releases Directed to Compartment C
Satisfies Environmental Water Supply Releases to STA-6 From Simulation
C-139 Basin Runoff Added to Inflows
Discharges Directed to Both STA-5 and STA-6, In Proportion to Treatment Capacity
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Integrated Alternative
In Each Component, Allocate Storage Necessary To Meet Water Supply Demands From Ground Surface Up
In Component A, 4.0 Ft. Depth
In Component C, 1.5 Ft. Depth
Component B Not Used to Meet Water Supply Demands (Modeled for No Withdrawal Below 1.0 Ft. Depth)
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Integrated Alternative
Above Water Supply Storage Allocation, Releases to STAs Determined by Stage on Previous Day, With Maximum Rate of Release at Maximum Storage Depth and Equal to Hydraulic Capacity of Receiving STA
Adjusted in Component A to Limit Maximum Storage Depth
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Integrated Alternative
Average Annual Inflow Volume of 1,238,000 Acre-Feet
Depths Range from Ground to 10.9 ft. Above Ground
RESERVOIR OPERATIONS SUMMARY
Max. Depth (ft)
Min. Depth (ft)
Ave. Depth (ft.)*
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Integrated Alternative
Average Annual Inflow Volume to STAs of 1,029,000 Acre Feet
Average Annual Inflow TP Load to STAs of 76.5 tonnes (60 ppb)
*TP loads estimated using information presented in the Baseline Data Report (Goforth & Piccone, 2001)
ESTIMATED AVERAGE ANNUAL STA INFLOWS
Receiving STA
Volume (ac-ft)
Integrated Alternative
Four New Pumping Stations, Total Installed Capacity of 8,100 cfs
Seven New Spillways, Total Installed Capacity of 15,893 cfs
SUMMARY OF NEW WATER CONTROL STRUCTURES
Structure Type
Pumping Station
NNR Canal
Component A
Spillway
Spillway
Spillway
Spillway
Spillway
Pumping Station
C-139 Basin
Compartment C
Pumping Station
Miami Canal
Compartment C
Spillway
Spillway
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Integrated Alternative
As Compared to 2050wPROJ Simulation, Projected to Reduce TP Load Discharged to STAs by 38%, With:
12,000 Acre Reduction in Surface Area
8,775 cfs Reduction in New Pumping Capacity (2 Fewer Stations)
1,429 cfs Increase in Spillway Capacity, But One Less Structure
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Integrated Alternative
Levee Impacts
Component A: Length Reduced From 53 to 42 Miles, But Height Increases From Approx. 15’ to 20’ Above Grade
Component B: New Levee and Supply Canal Along North Line of STA-2, Otherwise No Significant Change
Component C: No Change in Length, Height Increases From Approx. 15’ to 18’ Above Grade
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Just a Starting Point!
Again, Time and Budget Constraints Limited Opportunity to Consider Additional Alternatives.
For EAA Reservoirs Project, Phase 1 Need a Simulation to Define Requirements Prior to Full Completion of CERP, Roll The Results of That Analysis Into Additional Alternatives
Can Suggest Additional Alternatives For Consideration
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
One Possibility
Try to Accommodate All Phase 1 Demands and Functions
Consider Possible Contribution to Phase 2 Requirements
Structure Generally As Previously Discussed
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
One Possibility
Separate Compartment C From Lake Okeechobee Regulatory Releases In Total; Limit Possible Inflows to C-139 Basin and C-139 Annex. Evaluate Potential Beneficial Impact of Storage On Receiving Water Bodies. Let It Stand or Fall on Its Own Merits (e.g., Incremental Benefits vs. Incremental Costs)
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
One Possibility
Use Compartment B to Replace the Function of Compartment C as Simulated in 2050wPROJ. Let STA-2 Stand Alone. Consider Compartment B Developed As a Smaller Reservoir Coupled with STA on the Available Footprint, Potentially Discharge to NNR Canal Immediately Upstream of S-7 (Would Tie to STA-3/4 Discharge Works).
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Summary
It does appear possible to couple water quality improvement with the hydrologic function of the EAA Storage Reservoirs project, without impacting the hydrologic function or significantly increasing cost.
Many possible adjustments can be made, need to consider a broad array - today’s discussion just a starting point
Basin-Specific Feasibility Studies Everglades Construction Project Tributary Basins
Thank You!
You’ve been given a difficult but extremely important assignment - good luck and God speed!
Questions?
LAKE
OKEECHOBEE
Average Annual Inflow (Full CERP Completion)
Receiving STA
Volume (ac-ft)
Structure Type
Pumping Station
NNR Canal
Component A
Spillway
Spillway
Spillway
Spillway
Spillway
Pumping Station
C-139 Basin
Compartment C
Pumping Station
Miami Canal
Compartment C
Spillway
Spillway
ESTIMATED AVERAGE ANNUAL STA INFLOWS
Average Annual Inflow (Full CERP Completion)
Receiving STA
Volume (ac-ft)
SUMMARY OF NEW WATER CONTROL STRUCTURES
Structure Type
Pumping Station
NNR Canal
Compartment A1
Spillway
Spillway
Spillway
Pumping Station
Miami Canal
Compartment A2
Pumping Station
NNR Canal
Compartment A2
Spillway
Spillway
Spillway
Pumping Station
NNR Canal
Compartment B
Compartment A2 Overflow from NNR Canal
Spillway
Pumping Station
Miami Canal
Compartment C
Spillway