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Donaldsonville, LA to the Gulf of Mexico Feasibility Study.

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Presentation on theme: "Donaldsonville, LA to the Gulf of Mexico Feasibility Study."— Presentation transcript:

1 Donaldsonville, LA to the Gulf of Mexico Feasibility Study

2 Existing Conditions Interior Drainage and Hurricane Surge Donaldsonville, LA to the Gulf of Mexico Feasibility Study U.S. Army Corps of Engineers New Orleans District 05/16/06

3 Donaldsonville, Louisiana to the Gulf of Mexico Donaldsonville, Louisiana to the Gulf of Mexico New Orleans District Boundary LakePontchartrainLakePontchartrain Gulf of Mexico Study Area Baton Rouge New Orleans Donaldsonville AlexandriaAlexandria

4 Donaldsonville, LA to the Gulf of Mexico TopicsTopics Interior Drainage Interior Drainage - HEC-HMS Schematic - HEC-HMS Schematic - HEC-RAS Drainage Area - HEC-RAS Drainage Area - Hurricane Allison Calibration - Hurricane Allison Calibration Hurricane Surge Hurricane Surge - ADCIRC Modeling - ADCIRC Modeling Typical Existing Conditions Typical Existing Conditions - Stage Frequency Curves - Stage Frequency Curves - Reach and Stage Data for Economic Analysis - Reach and Stage Data for Economic Analysis Future Activities Future Activities - Levee Alternatives - Levee Alternatives - Water and Sediment Diversion Structures - Water and Sediment Diversion Structures

5 Study Objectives Study Objectives Hurricane Protection Hurricane Protection Interior Drainage Interior Drainage Eco-system Restoration Eco-system Restoration Corps of Engineers New Orleans District

6 Donaldsonville, LA to the Gulf of Mexico Interior Drainage HEC – HMS and HEC –RAS Modeling HEC – HMS and HEC –RAS Modeling Interior Hydraulic Model of Existing Conditions Interior Hydraulic Model of Existing Conditions - Flows in bayous - Flows in bayous - Identify flow obstructions in current system - Identify flow obstructions in current system - Existing pump stations - Existing pump stations - Need for additional pump stations - Need for additional pump stations - Effects of additional freshwater diversions - Effects of additional freshwater diversions Analyze Future Conditions Analyze Future Conditions

7 Donaldsonville, LA to the Gulf of Mexico

8 HEC – HMS Schematic

9 Donaldsonville, LA to the Gulf of Mexico

10 SubbasinDrainage Area NumberDescriptionSquare Miles 1Between Pipeline Canals14.459 2Raceland/Thibodaux, Bayou Boeuf/151.354 Grand Bayou, SA2 Lake Boeuf 3Elmer/Choupique/Chegby14.616 Bayou Boeuf @ Lac DesAllemands165.970 4Bayou Chevreuil/Bayou Citamon101.997 5Baker Canal South8.461 6Baker Canal East0.590 7Plattenville, Baker Canal North30.767 8Donaldsonville, Bayou Napoleon34.978 9Welcome, St. James Canal24.782 10Bayou Verret28.689 SubbasinDrainage Area NumberDescriptionSquare Miles 11Lower Vacherie, Vacherie Canal7.570 12Vacherie, Bayou Lassene/Brazan Canal24.579 13Wallace6.538 14Bayou Becnel11.892 15Johnson9.602 16Edgard, Bayou Lasseigne6.345 17Killona, Bayou Fortier/ St. Charles Canal/45.500 Providence Canal SA1Lake Des Allemands24.571 19Mathews/Raceland/Des Allemands,160.524 Godchaux Canal, Hwy 90 20Baie Des Deux Chenes1.489 Sub-Watershed Areas

11 Donaldsonville, LA to the Gulf of Mexico SubbasinDrainage Area NumberDescriptionSquare Miles 21Hahnville, Eighty Arpent Canal,32.455 Paradis Canal 22Sunset Drainage District17.153 18LaRose/Lockport, Tismond Foret Canal71.823 BayouVacherie, Company Canal 23Luling/Boutte, Cousins Canal, Davis61.704 Pond Freshwater Diversion Project 25Marrero/Westwego, Bayou Segnette107.901 SubbasinDrainage Area NumberDescriptionSquare Miles SA3Lake Cataoutche14.041 SA4Lake Salvador71.602 24Avondale/Waggaman26.398 26Near V-line levee3.254 27Harvey/Gretna/Terrytown13.688 28Belle Chase20.830 29Algiers15.035 30Stanton6.094

12 Donaldsonville, LA to the Gulf of Mexico HYD-35 TP=40 TP-49 Frequency5-min15-min1-hour2-hour3-hour6-hour12-hour24-hour2-day4-day7-day10-day 1-YR 2-YR0.581.262.473.103.404.204.905.706.607.608.809.60 5-YR0.651.443.013.754.305.306.507.708.509.5011.0012.00 10-YR0.711.573.404.305.006.207.609.1010.2011.1012.7013.80 25-YR0.791.763.975.005.707.209.0010.6012.1013.3015.3016.70 50-YR0.861.934.415.506.308.0010.0012.0013.8015.2017.3018.50 100-YR0.932.074.856.106.909.0011.1013.2015.1017.0019.1020.50 200-YR1.002.155.306.607.509.8012.3014.7016.7018.7020.8022.50 500-YR1.052.305.807.308.4010.9013.7016.7018.7020.9023.2025.00 1000-YR1.102.506.207.909.0011.8014.8018.0020.2022.5025.0027.00 Rainfall Depth – Duration Frequency

13 Donaldsonville, LA to the Gulf of Mexico ClassificationABC#0.10.20.30.40.50.60.70.80.9D# Fresh Marsh39617474.675.275.876.47777.678.278.879.480 Intermediate Marsh39617474.675.275.876.47777.678.278.879.480 Brackish Marsh39617474.675.275.876.47777.678.278.879.480 Saline Marsh39617474.675.275.876.47777.678.278.879.480 Wetland Forest-Dec43657676.677.277.878.47979.680.280.881.482 Wetland Forest-Ever49697979.58080.58181.58282.58383.584 Wetland Forest-Mix39617474.675.275.876.47777.678.278.879.480 Upland Forest-Dec32587272.773.474.174.875.576.276.977.678.379 Upland Forest-Ever43657676.677.277.878.47979.680.280.881.482 Upland Forest-Mix39617474.675.275.876.47777.678.278.879.480 Dense Pine Thicket32587272.773.474.174.875.576.276.977.678.379 Wetland Scrub/Dec30486565.866.667.468.26969.870.671.472.273 Wetland Scrub/Ever35567070.771.472.172.873.574.274.975.676.377 Wetland Scrub/Mix30556868.769.470.170.871.572.272.973.674.375 Upland Scrub/Dec30486565.866.667.468.26969.870.671.472.273 Upland Scrub/Ever35567070.771.472.172.873.574.274.975.676.377 Habitat and Land Use Classification Curve Numbers

14 Donaldsonville, LA to the Gulf of Mexico ClassificationABC#0.10.20.30.40.50.60.70.80.9D# Upland Scrub/Mix30556868.769.470.170.871.572.272.973.674.375 Agri-Cropland-Grass49697979.58080.58181.58282.58383.584 Vegetated Urban49697979.58080.58181.58282.58383.584 Non-Vegetated Urban71808787.487.888.288.68989.489.890.290.691 Upland Barren77869191.391.691.992.292.592.893.193.493.794 Wetland Barren68798686.386.686.987.287.587.888.188.488.789 Wetland Complex85 Water100 Habitat and Land Use Classification Curve Numbers

15 Donaldsonville, LA to the Gulf of Mexico

16

17 HEC – RAS Drainage Areas

18 Donaldsonville, LA to the Gulf of Mexico

19 BAKER CANAL EAST BAKER CANAL NORTH BAKER CANAL SOUTH BAYOU BARATARIA BAYOU BECNEL BAYOU BOEUF BAYOU CHEVREUIL BAYOU CITAMON BAYOU DES ALLEMANDS BAYOU FORTIER BAYOU LASSEIGNE BAYOU LASSENE BAYOU PEROT BAYOU VACHERIE BAYOU VERRET BAYOU SEC / Bayou Verret South BRAZAN CANAL COMPANY CANAL COMPANY CANAL NORTH EIGHTY ARPENT CANAL FORTY ARPENT CANAL GIWW GODCHAUX CANAL GRAND BAYOU HALPIN CANAL LAC DES ALLEMANDS OLD & NEW U.S. HWY 90 PARADIS CANAL PIPELINE CANAL PIPELINE LOCATION CANALS / Monterey & Bowie Canals PROVIDENCE CANAL RL1 – CHOUPIQUE RL2 – CHACKBAY, CHEGBY BAYOUS & CANALS SURVEYS

20 Donaldsonville, LA to the Gulf of Mexico RL3 – CHOCTEAU RD. RL4 – LAUREL VALLEY RD. RL5 – LA PEANS RL6 – BAYOU BATON PILOU RL7 – KRAEMER RL8 – BAYOU ROND POMPON RL9 – BOEUF RL10 – BAYOU BOEUF RL11 – LOWER VACHERIE SAM FORET CANAL ST. CHARLES CANAL ST. JAMES CANAL EAST ST. JAMES CANAL SOUTH ST. JAMES CANAL NORTH THERIOT CANAL TISAMOND FORET CANAL VACHERIE CANAL BAYOU DES ALLEMANDS STRUCTURE LAKE BOEUF LAKE CATAOUATCHE LAKE SALVADOR BAYOU PEROT GIWW BAYOU SEGNETTE WATERWAY BAYOU BARATARIA WATERWAY ALGIERS CANAL HARVEY CANAL BAYOUS & CANALS SURVEYS CONTINUATION

21 Donaldsonville, LA to the Gulf of Mexico Tropical Storm Allison Calibration

22 Donaldsonville, LA to the Gulf of Mexico COMPARISON OF TROPICAL STORM ALLISON* HISTORICAL STAGES VS. HEC-RAS COMPUTED STAGES FOR SELECTED GAGE LOCATIONS (FT. NGVD) GAGE LOCATIONALLISON STAGEHEC-RAS STAGE Barataria Waterway @ Lafitte, LA2.812.76 Bayou Des Allemands @ Des Allemands, LA3.223.19 Bayou Segnette @ Lapalco Blvd., LA4.074.03 Intracoastal Waterway @ Harvey Lock, LA3.903.88 Intracoastal Waterway @ Algiers Lock, LA4.013.75 * Tropical Storm Allison 4 to 12 June, 2001.

23 Donaldsonville, LA to the Gulf of Mexico Hurricane Surge ADCIRC Modeling ADCIRC Modeling Hurricane Surge Model of Existing Conditions Hurricane Surge Model of Existing Conditions - Identify Hurricane Surge Heights - Identify Hurricane Surge Heights - Water Level Boundary Conditions for Interior Drainage - Water Level Boundary Conditions for Interior Drainage Analyze Future Conditions Analyze Future Conditions

24 Donaldsonville, LA to the Gulf of Mexico ADCIRC Modeling

25

26

27 Donaldsonville, LA to the Gulf of Mexico Typical Existing Conditions Stage – Frequency Curves HEC – RAC and ADCIRC Typical Existing Conditions Stage – Frequency Curves HEC – RAC and ADCIRC

28 Donaldsonville, LA to the Gulf of Mexico

29

30

31

32

33

34 Reach and Stage Data for Economic Analysis Reach and Stage Data for Economic Analysis

35 Donaldsonville, LA to the Gulf of Mexico

36 Frequency Existing Conditions Existing Alternatives (years)Stage (ft NAVD) RASADCIRC 1X XXXXX 22.5 52.93 1.64 103.22 1.97 253.56 2.62 503.77 3.28 1004.13.954.1 200 4.09 5006.824.296.82 Location = Between Pipeline Canals Storage area = SA-1A Reach = 1A Type = Lowland Land Use = Wetland Forest – Deciduous & Fresh Marsh

37 Donaldsonville, LA to the Gulf of Mexico Frequency Existing Conditions Existing Alternatives (years)Stage (ft NAVD) RASADCIRC 1X XXXXX 21.74 52.622.092.62 103.282.43.28 254.272.644.27 505.252.915.25 1006.23.146.2 2007.73.647.7 5009.353.739.35 Location = Bayou Perot, Barataria Waterway Storage Area = Gulf Stream = GIWW Type = Lowland Land Use = Fresh Marsh& Wetlands; Forest – Deciduos & Water

38 Donaldsonville, LA to the Gulf of Mexico Future Activities

39 Donaldsonville, LA to the Gulf of Mexico Levee Alternatives Levee Alternatives Current Levee Alignments Being Studied Levee Alternatives Levee Alternatives Current Levee Alignments Being Studied

40 - Bayou Lafourche - Hwy 90 - Pipeline Canal - GIWW - West Bank & Vicinity Hurricane Protection West Bank HP Project

41 West Bank HP Project

42 West Bank & Vicinity, New Orleans, LA, Hurricane Protection Project West Bank & Vicinity, New Orleans, LA, Hurricane Protection Project 90 AMES P.S. OAK COVE P.S. New Orleans COUSINS P.S. LAKE CATAOUATCHE NEW WESTWEGO P.S. OLD WESTWEGO P.S. B. SEGNETTE HERO CANAL ALGIERS HARVEY CANAL ALGIERS LOCK CANAL HARVEY LOCK MISSISSIPPI RIVER ESTELLE P.S. LAKE SALVADOR Existing Pumping Stations Project Levees/Floodwalls Road Floodgate Structure MT. KENNEDY P.S. N.O. S&WB P.S. #11 SEGNETTE P.S. HARVEY P.S. 45 NEW ESTELLE P.S. HERO P.S. HERO P.S. PLANTERS P.S. PLANTERS P.S. BELLE CHASSE #2 P.S. N.O. S&WB P.S. #13 LakeCataouatcheAreaLakeCataouatcheArea EastofHarvey Canal Area EastofHarvey Westwego to Harvey Canal Area Westwego to Harvey Canal Area PLAQUEMINES P.S. 23

43 Donaldsonville, LA to the Gulf of Mexico Water and Sediment Diversion Structures

44 Donaldsonville Laplace Des Allemands Metairie Lake Salvador Lake Salvador Lake Cataouatche Lake Cataouatche Lac Des Allemands Lac Des Allemands Mississippi River Lafourche Terrebonne Parish Terrebonne Parish Jefferson Parish Jefferson Parish St. Charles Parish St. Charles Parish St. James Parish St. James Parish St. John Parish St. John Parish Larose Luling 30’ – 60’ Channel Cross-Section 1500 ’ Bayou Donaldsonville, LA to the Gulf of Mexico Water & Sediment Diversion Structures Houma Thibodaux Lafourche Parish GIWW Third Delta Conveyance Channel Third Delta Conveyance Channel Water Diversion Structures Water Diversion Structures

45 Donaldsonville, LA to the Gulf of Mexico Reynold Broussard Hydraulics and Hydrologic Branch (504) 862-2428 (504) 862-2471 fax Reynold.D.Broussard@mvn02.usace.army.mil Frank Duarte Project Manager (504) 862-1014 (504) 862-2572 fax Francisco.M.Duarte@mvn02.usace.army.mil Study Website: http://www.mvn.usace.army.mil/pd/projectsList/ Below the List of Projects click on “Mississippi River & Tributaries (MRT)” click on “Donaldsonville to the Gulf of Mexico”

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