Southeast Louisiana Project

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Donaldsonville, LA to the Gulf of
MexicoFeasibility Study



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Existing ConditionsInterior Drainage and
Hurricane Surge Donaldsonville, LA to the Gulf
of MexicoFeasibility Study
U.S. Army Corps of EngineersNew Orleans District
05/16/06
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Donaldsonville, Louisiana to the Gulf of Mexico

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Donaldsonville, LA to the Gulf of Mexico
Topics

• Interior Drainage
• - HEC-HMS Schematic
• - HEC-RAS Drainage Area
• - Hurricane Allison Calibration
• Hurricane Surge
• - ADCIRC Modeling
• Typical Existing Conditions
• - Stage Frequency Curves
• - Reach and Stage Data for Economic Analysis
• Future Activities
• - Levee Alternatives
• - Water and Sediment Diversion Structures

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Study Objectives

• Hurricane Protection

• Interior Drainage

• Eco-system Restoration

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Donaldsonville, LA to the Gulf of Mexico
Interior Drainage

• HEC HMS and HEC RAS Modeling
• Interior Hydraulic Model of Existing Conditions
• - Flows in bayous
• - Identify flow obstructions in current
  system
• - Existing pump stations
• - Need for additional pump stations
• - Effects of additional freshwater
  diversions
• Analyze Future Conditions

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Donaldsonville, LA to the Gulf of Mexico
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Donaldsonville, LA to the Gulf of Mexico

• HEC HMS Schematic

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Donaldsonville, LA to the Gulf of Mexico
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Donaldsonville, LA to the Gulf of Mexico
Sub-Watershed Areas
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Donaldsonville, LA to the Gulf of Mexico
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Donaldsonville, LA to the Gulf of Mexico
Rainfall Depth Duration Frequency
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Donaldsonville, LA to the Gulf of Mexico
Habitat and Land Use Classification Curve Numbers
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Donaldsonville, LA to the Gulf of Mexico
Habitat and Land Use Classification Curve Numbers
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Donaldsonville, LA to the Gulf of Mexico
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Donaldsonville, LA to the Gulf of Mexico
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Donaldsonville, LA to the Gulf of Mexico

• HEC RAS Drainage Areas

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Donaldsonville, LA to the Gulf of Mexico
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Donaldsonville, LA to the Gulf of Mexico
BAYOUS CANALS SURVEYS
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Donaldsonville, LA to the Gulf of Mexico
BAYOUS CANALS SURVEYS CONTINUATION
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Donaldsonville, LA to the Gulf of Mexico

• Tropical Storm Allison Calibration

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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)
Tropical Storm Allison 4 to 12 June, 2001.
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Donaldsonville, LA to the Gulf of Mexico
Hurricane Surge

• ADCIRC Modeling
• Hurricane Surge Model of Existing Conditions
• - Identify Hurricane Surge Heights
• - Water Level Boundary Conditions for
  Interior Drainage
• Analyze Future Conditions

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Donaldsonville, LA to the Gulf of Mexico

• ADCIRC Modeling

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Donaldsonville, LA to the Gulf of Mexico

• Typical Existing Conditions
• Stage Frequency Curves
• HEC RAC and ADCIRC

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Donaldsonville, LA to the Gulf of Mexico
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Donaldsonville, LA to the Gulf of Mexico
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Donaldsonville, LA to the Gulf of Mexico
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Donaldsonville, LA to the Gulf of Mexico
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Donaldsonville, LA to the Gulf of Mexico
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Donaldsonville, LA to the Gulf of Mexico
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Donaldsonville, LA to the Gulf of Mexico

• Reach and Stage Data for
• Economic Analysis

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Donaldsonville, LA to the Gulf of Mexico
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Donaldsonville, LA to the Gulf of Mexico
Location Between Pipeline Canals Storage area
SA-1A Reach 1A Type Lowland
Land Use Wetland Forest
Deciduous Fresh Marsh
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Donaldsonville, LA to the Gulf of Mexico
Location Bayou Perot, Barataria Waterway
Storage Area Gulf Stream GIWW Type
Lowland Land Use
Fresh Marsh Wetlands Forest Deciduos Water
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Donaldsonville, LA to the Gulf of Mexico

• Future Activities

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Donaldsonville, LA to the Gulf of Mexico

• Levee
  Alternatives
• Current Levee Alignments Being Studied

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West Bank HP Project
- Bayou Lafourche - Hwy 90 - Pipeline Canal -
GIWW - West Bank Vicinity Hurricane
Protection
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West Bank HP Project
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West Bank Vicinity, New Orleans, LA, Hurricane
Protection Project
90
RIVER
ALGIERS LOCK
East of Harvey Canal Area
New Orleans
MISSISSIPPI
SEGNETTE P.S.
N.O. SWB P.S. 11
HARVEY LOCK
OLD WESTWEGO P.S.
HARVEY P.S.
N.O. SWB P.S. 13
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NEW WESTWEGO P.S.
HARVEY CANAL
PLANTERS P.S.
Lake Cataouatche Area
AMES P.S.
BELLE CHASSE 2 P.S.
CANAL
COUSINS P.S.
MT. KENNEDY P.S.
HERO P.S.
NEW ESTELLE P.S.
OAK COVE P.S.
LAKE CATAOUATCHE
ALGIERS
ESTELLE P.S.
PLAQUEMINES P.S.
B. SEGNETTE
HERO CANAL
Westwego to Harvey Canal Area
LAKE SALVADOR
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Donaldsonville, LA to the Gulf of Mexico

• Water and Sediment Diversion Structures

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Donaldsonville, LA to the Gulf of Mexico Water
Sediment Diversion Structures
Donaldsonville
Laplace
Mississippi
St. John Parish
Metairie
River
St. James Parish
Lac Des Allemands
Luling
Jefferson Parish
Lake Cataouatche
Des Allemands
Thibodaux
St. Charles Parish
Bayou
Lake Salvador
Lafourche
Lafourche Parish
Houma
Larose
GIWW
Terrebonne Parish
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Donaldsonville, LA to the Gulf of Mexico

Reynold Broussard Hydraulics and Hydrologic
Branch [phone] [phone]
fax Reynold.D.Broussard_at_mvn02.usace.army.mil Fran
k Duarte Project Manager [phone] (504)
862-2572 fax Francisco.M.Duarte_at_mvn02.usace.army.m
il
Study Website http//www.mvn.usace.army.mil/pd/pr
ojectsList/ Below the List of Projects click on
Mississippi River Tributaries (MRT) click on
Donaldsonville to the Gulf of Mexico