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DID YOU KNOW… Implementing Louisiana’s Master Plan Reduces Flood Impacts for Coastal Communities?

October 11, 2017

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Did you know that while many of our major urban centers such as New Orleans, the North Shore, and Lake Charles are projected to see significant increases in storm surge based flooding, it will be the low-lying areas of the coast that could see the most obvious changes?

The above map shows estimated flood depths (under the Medium environmental scenario) if we take no additional restoration or risk reduction actions and a 100-year storm were to impact coastal Louisiana 50 years from now.  In 50 years, Houma could see over 15 feet of flooding from a 100-year storm event. Damage from storm surge based flooding events could be over seven times greater in the future if nothing else is done. If you want to learn more about coastal flood risk in your community, visit the Coastal Protection and Restoration Authority’s (CPRA) Master Plan Data Viewer to view your current and future storm surge based flood risk.

Louisiana Has a Plan 

Much can be done to reduce flooding risk for many of these coastal communities through a combination of restoration projects, structural protection, and nonstructural risk reduction projects. If we fully fund and implement the 2017 Coastal Master Plan to restore and protect our coast, under the Medium environmental scenario, we could reduce economic damages by $3 billion to individuals, communities, and industries at year 25 and $8.3 billion at year 50. This means that the benefits of risk reduction projects will pay for themselves three times over, during the next 50 years.

We estimate that we can reduce the damage the following communities would face from storm surge by more than 75%:

  • Houma
  • Slidell
  • Franklin and Charenton
  • Edgard
  • Kenner and Metarie
  • Garyville

We estimate that we can reduce the damage the following communities would face from storm surge by more than 90%:

  • Ama
  • Laplace and Reserve
  • Hahnville and Luling
  • Montz
  • Donaldsonville
  • Convent
  • Vacherie
  • Larose and Golden Meadow
  • Morgan City
  • Abbeville and Delcambre
  • Iberia Region

The 2017 Coastal Master Plan includes a range of projects that will effectively reduce flood damage coast wide by varying levels. Communities along the rim of Lake Pontchartrain and Lake Borgne, especially Slidell, Lacombe, Mandeville, Madisonville, and Ruddock, and communities associated with the Upper Barataria Basin, especially Des Allemands, Kraemer, and Chackbay, will benefit from implementation of structural protection projects. You can explore these areas of the coast and learn what projects are recommended for implementation by visiting the Master Plan Data Viewer.

Coastal communities and areas outside of the major levee systems, such as Lafitte, Lower Terrebonne, the west bank of Plaquemines and St. Bernard Parishes, the Chenier Plain, Cameron, Pecan Island, Hackberry, Sulphur, and Lake Charles, will benefit from implementation of nonstructural risk reduction measures.

Additionally, the 2017 Coastal Master Plan identifies many locations where structural and nonstructural projects will be implemented in concert to provide risk reduction.

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For more information about the 2017 Coastal Master Plan, please visit:

http://coastal.la.gov/our-plan/2017-coastal-master-plan/overview/

For more infromation about CPRA’s Flood Risk and Resilience Program, please visit:

http://coastal.la.gov/our-plan/2017-coastal-master-plan/flood-risk-and-resilience-program/