C-111
GENERAL REEVALUATION REPORT
Appendix A
Hydrology and Hydraulic Analysis
Appendix A Hydrology and Hydraulic Analysis
Table of Contents
Paragraph No.
1. General .......................................... .
2. Ba . Descnp. ti"on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . sin 3. Soils .......................................... .
4. Modeling ....................................... .
5. Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6. Rainfall Frequency .................................. .
7. Data.. . ......................................... .
8. Skew Factors ..................................... .
9. Rainfall Frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10. Design Storms ..................................... .
11. Antecedent Moisture Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . 12. Seasonal Flood Occurrence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14. Structure Operating Levels ............................. .
15. Base Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16. Alternative Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..... 1 7. Model Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
a. General ....................................
b. Operational Plan ............................... .
c. Sensitivity Analyses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . d. Structure 197 (S-197) ............................ .
e. Operational Plan-Studies . . . . . . . . . . . . . . . . . . . . . . . . . .
18. Plan For Water Control, ENP-South Dade Conveyance System . . . . . . . a. South Dade County . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . b. Water Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19. Overall Plan For Water Control - Everglades National Park ........ .
a. Authorization History ............................ .
b. Taylor Slough Demonstration Project .................. .
(1) General . . . . . . . . . . . . . . . . . . . . . . . . . . .... . (2) Test Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
c. Water Deliveries to the Eastern Panhandle of ENP via C-111 . . . .
d. Modified Water Deliveries General Design Memorandum (GDM) .
20. Hydraulic Design Criteria ............................
a. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....... .
b. Existing Hydraulic Conditions ...................... .
c. Post-Project Hydraulic Conditions. . ................. .
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A-i
d. Canal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . A-14
(1) Design water surface in canals . . . . . . . . . . . . . . . . . . A-14
(2) Maximum permissible velocities . . . . . . . . . . . . . . . . . A-15
(3) Side slopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-15
( 4) Cross-sections . . . . . . . . . . . . . . . . . . . . . . . . . . . A-15
(5) Transitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-15
(6) Roughness coefficients . . . . . . . . . . . . . . . . . . . . . . . A-15
(7) Sensitivity Analyses . . . . . . . . . . . . . . . . . . . . . . . . . A-15
(8) Freeboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-16
e. levee:s ........................................... A-16
f. Water Control Structures . . . . . . . . . . . . . . . . . . . . . . . . . . . A-16
(1) Optimum and Design Water Levels . . . . . . . . . . . . . . . A-16
(2) Salinity Control . . . . . . . . . . . . . . . . . . . . . . . . . . A-16
g. Bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-17
h. Disposal Mound Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-17
i. Sediment Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-17
21. Hydraulic designs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-17
a. Alternatives ............... ; . . . . . . . . . . . . . . . . . . . A-17
b. Proposed Plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-18
c. Pump Stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-20
d. Canals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-20
{l) Pump Stations S-332A & S-332B Discharge Canals . . . . . A-20
(2) Pump Station S-332C Discharge Canal . . . . . . . . . . . . . A-20
{3) Pump Station S-332D Discharge Canal . . . . . . . . . . . . . A-21
(4) Pump Station S-332 Connector Canal . . . . . . . . . . . . . . A-21
(5) Canal 111 North (spreader canal) . . . . . . . . . . . . . . . . A-21
(6) Existing Canals C-109 and C-110 . . . . . . . . . . . . . . . . A-21
e. levees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-21
(1) levee 31 West Tieback . . . . . . . . . . . . . . . . . . . . . . A-21
(2) S-332D Tieback . . . . . . . . . . . . . . . . . . . . . . . . . . . A-22
{4) Modifications to Existing Berms . . . . . . . . . . . . . . . . . A-22
f. Culvert/Riser Structures . . . . . . . . . . . . . . . . . . . . . . . . . . . A-23
(1) Culverts through L-31W Tieback . . . . . . . . . . . . . . . . A-23
(2) Culvert from C-111 Connector Canal to S-332 . . . . . . . . A-23
g. Overflow Spillway on L-31W Tieback . . . . . . . . . . . . . . . . . . A-23
h. Bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-23
i. Existing Canals and Water Control Structures . . . . . . . . . . . . . . A-24
j. Performance/water surface profiles . . . . . . . . . . . . . . . . . . . . . A-27
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Appendix A
Hydrology and Hydraulic Analysis
TAB~
A-1. Depth-Area in percent of Point Rainfall for lXl Model for Storm Centered Over C-111
A-2. 2-yr & 10-yr Storm - Area.Uy Reduced Rainfall for 13 Rain Gage Basins A-3. 50-yr & 100-yr Stonn - Areally Reduced Rainfall for 13 Rain Gage Basins A-4. Storm Categories - Homestead Experiment Station A-5. Structures Managed in Route Subroutine A-6. C-111 Alternatives - Percent Chance Exceedance/1965-1989 Simulations A-7. C-111 Alternatives - Flood Event Peak Stages vs. Exceedance Frequency A-8. Optimum Stages in BNP-South Dade Conveyance System A-9. Minimum Monthly Delivery Schedule to Taylor Slough at S-332 A-10. Minimum Monthly Delivery Schedule to :Eastern Panhandle at S-18C A-11. Hydraulic Design Data - Pump Station S-332A A-12. Hydraulic Design Data - Pump Station S-3328 A-13. Hydraulic Design Data - Pump Station S-332C A-14. Hydraulic Design Data - Pump Station S-332D A-15. Hydraulic Design Data - Pump Station S-332E A-16. Hydraulic Design Data - Canal 111 North A-17. Hydraulic Design Data - Levee 31 West Tieback A-18. Hyaraulic Design Data - S-332D Tieback A-19. Hydraulic Design Data - Retention/Detention Area Culverts A-20. Hydraulic Design Data - Culvert from C-111 connector canal to S-332 A-21. Existing Channel Dimensions A-22. Existing Structure Hydraulic Data
PHOTOGRAPHS
A-1. S-332 A-2. S-332 A-3. State Road 9336 Bridge Across Taylor Slough A-4. Old Ingraham Highway Across Taylor Slough A-5. L-31N Borrow Canal North of S-176 A-6. Looking West into Everglades National Park from L-31W
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Appendix A
Hydrology and Hydraulic Analysis
PHOTOGRAPHS - (continued)
A-7. Spoil Mound and Gap on South Bank C-111 A-8. S-174 A-9. S-175 A-10. S-176 A-11. S-177 A-12. S-178 A-13. S-18C A-14. S-197
FIGURES
A-1. Homestead Experiment Station - Annual Rainfall, Expected Probability A-2. One by One Grid A-3. Stage Hydrographs at Various Grid Cells A-4. Sensitivity Analyses Stage Hydrographs A-5. Structure 197 - Flow versus Percent Chance Exceedance A-6. Hydraulic Profile - Typical from Pump Station across Retention/Detention Area,
through Culvert/Riser A-7. Schematic Plan Layout - Connector canal, controlled culverts, and tee-connection for
S-332 &. S-175, Alternative 6, Recommended Plan A-8. Schematic Profile - Canal 111 North, Alternative 6, Recommended Plan A-9. Cut A - Canal 111 North, Alternative 6, Recommended Plan A-10. Overflow Spillway - L-31W Tieback
PLATES
A-1. Alternative 1 A-2. Alternative IA A-3. Alternative 2 A-4. Alternative 3 A-5. Alternative 4 A-6. Alternative 5 A-7. Alternative 6 A-8. Alternative 6A, Recommended Plan A-9. Schematic Plan & Profile - Pump Station Discharge Canals and Culvert/Risers A-10. Hydraulic Profile - C-111 from S-18C to S-176 A-11. Hydraulic Profile - C-lllE A-12. Hydraulic Profile - L-31 N from S-176 to S-173 (S-331)
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Appendix A
Hydrology and Hydraulic Analysis
1. General. This appendix addresses the hydrologic modeling and hydraulic design efforts for providing a more natural distribution of runoff into Everglades National Park while providing 40% SPF protection for the C
