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Basin-Specific Feasibility Studies, ECP Basins Evaluation of Alternatives August 21, 2002 Presentation to STA Design Review Staff

Basin-Specific Feasibility Studies, ECP Basins Evaluation of Alternatives

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Basin-Specific Feasibility Studies, ECP Basins Evaluation of Alternatives. STA-3/4. Presentation to STA Design Review Staff. August 21, 2002. STA 3/4. Includes S-7/S-2 and S-8/S-3 Basins Additional Inflows from C-139 Basin South Shore Drainage District S-236 Basin Lake Okeechobee. - PowerPoint PPT Presentation

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Page 1: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility Studies,ECP Basins

Evaluation of Alternatives

Basin-Specific Feasibility Studies,ECP Basins

Evaluation of Alternatives

August 21, 2002August 21, 2002

Presentation to STA Design Review Staff

Page 2: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

STA 3/4 STA 3/4

Includes S-7/S-2 and S-8/S-3 Basins

Additional Inflows from C-139 Basin South Shore Drainage

District S-236 Basin Lake Okeechobee

Page 3: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

STA-3/4STA-3/4

Present Design Approx. 16,543 Acres in 3 Parallel Flow Paths

Emergent Macrophyte Marsh Current Design Basis

Under Construction, Scheduled Completion Late 2003

Legend:

Existing SAV Existing Spillway

Existing Pump Station Existing Control Structure

Existing Seepage

Pump Station

G-380 A-F G-377 A-E G-374 A-F

G-381 A-F

G-376 A-F

G-375 A-F

G-379 A-E

G-378 A-E

G-383

G-382AG-382B

G-357

S-150

Inflow Canal

NNRCanal

Cell 1A

Cell 1B

Cell 2A

Cell 2B

Cell 3

Holey Land(Toe of the Boot)

WCA 3A

N

Supply Canal

L-5 Canal

Cell 3 Discharge Canal

Discharge Canal

Auxiliary SeepagePump Station

Borrow Pits

~10 miles

~8 miles

EffectiveCell Area (ac)1A 3,0391B 3,4882A 2,5422B 2,894 3 4,580

Total 16,543 ac

G-372

G-370

S-7

S-8

G-404

G-371

Page 4: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Baseline ConditionsBaseline Conditions Current Design, Present Inflows Through 2014 Current Design, Inflows Modified To Reflect

Full CERP Implementation (EAA Storage Reservoirs, Phase 1 and 2) After 2014 Only Phase 1 Authorized by WRDA 2000 Not a CERP-sanctioned simulation, assumptions

made for the BSFS which may or may not coincide with the final conceptual design for the EAA Reservoirs

Inflow TP Loads Reflect 50% Reduction Due To BMPs In EAA

Page 5: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Baseline 2015-2056Baseline 2015-2056

Hydrologic Data and inflow TP loads taken from District-furnished files

Outflows of long-term average flow-weighted mean TP concentrations estimated by method presented in Phosphorus Removal by Urban Runoff Detention Basins, W.W. Walker, Ph.D. Preliminary In Nature Subject to Review and Possible Substantial

Modification During Design of EAA Reservoirs

Page 6: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Baseline 2015-2056Baseline 2015-2056

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.

Page 7: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Baseline 2015-2056Baseline 2015-2056

Component A1 Reservoir Area

= 20,400 acres Average Inlet

Concentration = 95 ppb

Average Outlet Concentration = 65 ppb

Estimated Long-Term Average

Outflow Concentration, Compartment A1Mean Depth in Reservoir (m) (For wet period fraction) 1.168Approx. Basin Area (acres) 20,400Approx. Basin Area (sq.m.) 82,556,148

ESTIMATED TREATMENT IN RESERVOIR (Analyze as for reservoir per Walker 1987)Input Parameters Estimated TP Removal

Average Inlet Concentration mg/l 0.0947 q 2.406Average Annual Inflow Volume ac/ft 174,777 K 0.025Average Annual Inflow Volume cu.m. 215,586,000 P 117 ppbAverage Annual Rainfall m 1.287 N 1.422 Average Annual Evapotranspiration m 1.456 2.586Average TP Conc. In Rainfall (wet+dry) mg/l 0.026 R 0.442Infiltration from Groundwater m/yr 0.000 Pout 65 ppbWater Balance Adjustment & Exfiltration m/yr 0.016 Pout 0.0651 mg/lChange in Storage m./yr. 0.036 REF: Phosphorus Removal by Urban RunoffAve. TP Conc. In Seepage Inflows mg/l 0.000 Detention Basins;Lake and ReservoirWet Period Fraction 0.964 Management, Volume 3; North American

Lake Management Society; 1987SUMMARY OF RESULTS

Reservoir Area acres 20,400Ave. Annual Outflow Volume cu.m. 197,283,137Ave. Annual Outflow Volume ac-ft 159,939 Surface Discharges OnlyMean TP Conc. In Outflows mg/l 0.0651

Page 8: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Baseline 2015-2056Baseline 2015-2056

Component A2 Reservoir Area

= 20,400 acres Average Inlet

Concentration = 72 ppb

Average Outlet Concentration = 59 ppb

Estimated Long-Term Average

Outflow Concentration, Compartment A2Mean Depth in Reservoir (m) (For wet period fraction) 0.983Approx. Basin Area (acres) 20,400Approx. Basin Area (sq.m.) 82,556,148

ESTIMATED TREATMENT IN RESERVOIR (Analyze as for reservoir per Walker 1987)Input Parameters Estimated TP Removal

Average Inlet Concentration mg/l 0.0721 q 1.823Average Annual Inflow Volume ac/ft 127,761 K 0.018Average Annual Inflow Volume cu.m. 157,592,272 P 94 ppbAverage Annual Rainfall m 1.287 N 0.920 Average Annual Evapotranspiration m 1.303 2.163Average TP Conc. In Rainfall (wet+dry) mg/l 0.026 R 0.368Infiltration from Groundwater m/yr 0.000 Pout 59 ppbWater Balance Adjustment & Exfiltration m/yr 0.200 Pout 0.0594 mg/lChange in Storage m./yr. 0.070 REF: Phosphorus Removal by Urban RunoffAve. TP Conc. In Seepage Inflows mg/l 0.000 Detention Basins;Lake and ReservoirWet Period Fraction 0.887 Management, Volume 3; North American

Lake Management Society; 1987SUMMARY OF RESULTS

Reservoir Area acres 20,400Ave. Annual Outflow Volume cu.m. 133,965,784Ave. Annual Outflow Volume ac-ft 108,607 Surface Discharges OnlyMean TP Conc. In Outflows mg/l 0.0594

Page 9: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Baseline 2015-2056Baseline 2015-2056

Component B Reservoir Area

= 10,240 acres Average Inlet

Concentration = 71 ppb

Average Outlet Concentration = 59 ppb

Estimated Long-Term Average

Outflow Concentration, Compartment BMean Depth in Reservoir (m) (For wet period fraction) 0.682Approx. Basin Area (acres) 10,240Approx. Basin Area (sq.m.) 41,439,949

ESTIMATED TREATMENT IN RESERVOIR (Analyze as for reservoir per Walker 1987)Input Parameters Estimated TP Removal

Average Inlet Concentration mg/l 0.0707 q 4.824Average Annual Inflow Volume ac/ft 154,021 K 0.032Average Annual Inflow Volume cu.m. 189,983,513 P 74 ppbAverage Annual Rainfall m 1.303 N 0.333 Average Annual Evapotranspiration m 1.009 1.526Average TP Conc. In Rainfall (wet+dry) mg/l 0.0253 R 0.208Infiltration from Groundwater m/yr 0.000 Pout 59 ppbWater Balance Adjustment & Exfiltration m/yr 0.644 Pout 0.0586 mg/lChange in Storage m./yr. 0.055 REF: Phosphorus Removal by Urban RunoffAve. TP Conc. In Seepage Inflows mg/l 0.000 Detention Basins;Lake and ReservoirWet Period Fraction 0.703 Management, Volume 3; North American

Lake Management Society; 1987SUMMARY OF RESULTS

Reservoir Area acres 10,240Ave. Annual Outflow Volume cu.m. 173,206,550Ave. Annual Outflow Volume ac-ft 140,420 Surface Discharges OnlyMean TP Conc. In Outflows mg/l 0.0586

Page 10: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

STA-3/4 BaselineSTA-3/4 Baseline

Average Annual Inflows 2007-2014; 660,889 ac-ft at Mean TP Conc. Of

88 ppb 2015-2056; 628,502 ac-ft at Mean TP Conc. Of

76 ppb

Average Annual Outflows 2007-2014; 623,700 ac-ft at FW Conc. Of 36

ppb, Geo. Mean Conc. Of 36 ppb 2015-2056; 588,100 ac-ft at FW Conc. Of 32

ppb, Geo. Mean Conc. Of 30 ppb

Page 11: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Alternative 1Alternative 1

Current Design, Present Inflows Through 2014

STA-3/4 modified to optimize its performance--in place by 2014 Conversion of Cells 1B,

2B, & downstream Portion of Cell 3 from emergent to Submerged Aquatic Vegetation (SAV_C4)

Future (With CERP) Inflows 2015-2056Legend:

Conversion to SAV New Control Structures

New Small Forward New Levee

Pumping StationP

G-380 A-F G-377 A-E G-374 A-F

G-381 A-F

G-376 A-F

G-375 A-F

G-379 A-E

G-378 A-E

G-383

G-382AG-382B

G-357

S-150

Inflow Canal

NNRCanal

Cell 1A

Cell 1B

Cell 2A

Cell 2B

Cell 3A

Holey Land(Toe of the Boot)

WCA 3A

N

Supply Canal

L-5 Canal

Cell 3 Discharge Canal

Discharge Canal

Auxiliary SeepagePump Station

Borrow Pits

~10 miles

~8 miles

EffectiveCell Area (ac)1A 3,0391B 3,4882A 2,5422B 2,894 3A 3B

2,1532,427

Total 16,543 ac

G-372

G-370

S-7

S-8

G-404

G-371

Cell 3BP

PP

Page 12: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Alt. 1 Physical WorksAlt. 1 Physical Works

3.3 Miles of Interior Levee Subdividing Cell 3 Includes Additional Water Control Structures Also Includes 3.6 Miles Additional Power Line

Forward Pumping Stations (3 total, capacities range from 24 to 54 cfs) Pump From Emergent Cells During Drought To

Maintain Stages in SAV Cells

Herbicide treatment of Cells 1B, 2B, and (new) 3B

Page 13: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Alternative 2Alternative 2

STA-3/4 modified to optimize its performance--in place by 2006 Other Than Implementation Schedule,

Identical to Alternative 1

Existing Condition Inflows Through 2014

Future (With CERP) Inflows 2015-2056

Page 14: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

STA-3/4 STA-3/4 Summary of AlternativesSummary of Alternatives

* Computed Value Less than Calibration Range, Reported at Lowest Sustainable Concentration

** 2015 - 2056

Performance Measure: Unit Baseline** Alt 1 Alt 2Anticipated Start Date Date N/A Jan 2011 Jan 2003Date of Completion Date N/A Dec 2013 Dec 2006Long-term Flow-weighted Mean ppb 32 14* - 21 14* - 21Long-term Geometric Mean ppb 30 10 - 15 10 - 15Phosphorus Load Reduction kg N/A 546,630 682,899Phosphorus Load Reduction % N/A 45.6 57.0Capital Cost (2002 Dollars) $ N/A $9,150,000 $9,150,000Inc. O&M Cost (2002 Dollars) $/Yr N/A $310,000 $310,00050-yr Present Worth Cost (12/31/02) $ N/A $11,107,000 $14,863,000Cost Effectiveness $/kg N/A $20 $22

Page 15: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Sensitivity To SAV Sensitivity To SAV PerformancePerformance

Condition Location TP Conc. For Different SAV Communities

F.W. Geo. F.W. Geo.STA-3/4 Inflows 76 -- 76 --STA-3/4 Outflows 14* 10 21 15STA-3/4 Inflows 88 -- 88 --STA-3/4 Outflows 14 10 21 14

Alternative 1 (Post-CERP)Alternative 2 (Pre-CERP)

SAV_C4 NEWS

* Computed Value Less than Calibration Range, Reported at Lowest Sustainable Concentration

Page 16: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Sensitivity To BMP Sensitivity To BMP PerformancePerformance

Condition Location TP Conc. For BMP Load Reduction in S-7 & S-8 Basins of

F.W. Geo. F.W. Geo. F.W. Geo.STA-3/4 Inflows 118 -- 88 -- 59 --STA-3/4 Outflows 46 46 36 36 26 26STA-3/4 Inflows 91 -- 76 -- 60 --STA-3/4 Outflows 37 35 32 30 27 25STA-3/4 Inflows 91 -- 76 -- 60 --STA-3/4 Outflows 15 11 14* 10 14* 10*STA-3/4 Inflows 118 -- 88 -- 59 --STA-3/4 Outflows 17 12 14 10 14* 10*

Alternative 2 (Pre-CERP)

25% 50% 75%

Baseline, ExistingBaseline, FutureAlternative 1 (Post-CERP)

* Computed Value Less than Calibration Range, Reported at Lowest Sustainable Concentration

Page 17: Basin-Specific Feasibility Studies, ECP Basins  Evaluation of Alternatives

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

Basin-Specific Feasibility StudiesEverglades Construction Project Tributary Basins

General SensitivityGeneral Sensitivity

* Computed Value Less than Calibration Range, Reported at Lowest Sustainable Concentration

Condition Location TP Conc. In DMSTA Sensitivity Analyses10th Percentile Est. 50th Percentile Est. 90th Percentile Est.

F.W. Geo. Load F.W. Geo. Load F.W. Geo. LoadBaseline, Existing STA-3/4 Outflows 28 27 21,618 36 36 28,014 45 44 34,409Baseline, Future STA-3/4 Outflows 25 23 17,898 32 30 23,193 39 38 28,485Alternative 1 (Post-CERP) STA-3/4 Outflows 14* 10* 10,178* 14* 10 10,178* 17 12 12,420Alternative 2 (Pre-CERP) STA-3/4 Outflows 14* 10* 10,178* 14 10 10,980 18 12 13,503