Showing posts with label levees. Show all posts
Showing posts with label levees. Show all posts

Wednesday, March 25, 2009

Tough Choices Profile #1: Lafitte

On Tuesday, the Corps of Engineers held a public meeting for review of particular alignments for the hurricane levee system being considered. I assume this refers to the 100 year levee system but the T-P's article doesn't specify. Most of the possible levee alignments leave the town of Lafitte outside of the major levee system, although a smaller levee could always be created for them. On Tuesday nearly 200 of Lafitte's 8000 residents showed up to a Corps meeting clamoring to be included within the levee system.

For your reference, here is Lafitte.


View Larger Map

As you can see, Lafitte is far below the metropolitan area (which ends basically where it says "Marrero"). Lafitte, a town in Jefferson Parish that is named after Jean Lafitte- a pirate who fought valiantly for the US in the Battle of New Orleans- is known for it's great fishing, seafood, and culture. Unfortunately, we can not afford to put Lafitte- and every other such community- behind a massive flood system. And here's why:

Truth be told, not just Lafitte but all of Southern Louisiana is very vulnerable to erosion, subsidence, flooding and hurricanes. It will always be an unnatural battle to try to create security from flooding when you live on a Delta so close to the coast. Most people agree, however, that despite the risk, the benefits of preserving coastal Louisiana make the flood protection projects and coastal restoration efforts "worth it."

I tend to subscribe to Oliver Houck's (Tulane Environmental Law Professor) basic vision for New Orleans and coastal Louisiana. We should build levees that are relatively small in geographic range and focused on specific population concentrations. But we should also realize that although levees are powerful tools, they have serious downfalls. (Check out my post on the Limitations of Levees). Extending the major levee system to outlying towns such as Lafitte only makes the whole region more vulnerable and the system more difficult to maintain. Fortunately, they are not the only gun in our arsenal to protect us from hurricanes. We must pour our efforts into preserving the coastal wetlands, which act as a powerful buffer for storms.

Now, you tell a community of hard-working people with centuries-old culture that they can't be part of a big levee system. It's hard, I know it. But these are the tough choices that must be made. Much of the opportunity to make these tough choices has been missed, as leaders failed to make comprehensive plans for metro New Orleans and other areas in the wake of Katrina and Rita. We can't afford to miss more opportunities to make coastal Louisiana sustainable.

So what is Lafitte's future? Hopefully, it's a rich one. If we as a state decide that communities like Lafitte are important for economic and cultural reasons, then we should advocate various protections for the people who live there-- accepting that they bear a higher risk than us and do necessary work in industries such as seafood and oil and gas that couldn't be done further north. That means supporting good land use planning and small flood projects- possibly including smaller "ring" levees. And it means supporting these communities if they do flood-- supporting them financially, helping them to rebuild smarter, and giving them options for relocation. Of course all of this must go hand in hand with massive coastal restoration efforts if we are to have any chance of long-term security whatsoever.

Those are my two proverbial cents on this heart-wrenching issue. Your commentary is encouraged!

The Limitations of Levees

Many well-meaning advocates of Southern Louisiana push for massive levee projects expanding across Louisiana far out to protect small towns way down on the coast. I agree that we need some big levees, especially around already concentrated populations in lower risk areas. However, any discussions of levees should include considerations of their downfalls.

1) Levees are very expensive to build and also very expensive to maintain. A poorly built or maintained levee- as we saw in Katrina- is like not having levee at all! The larger the levee, the harder the fall if it is compromised at any one point.

2) Levees encourage development. The more "protection" we build in flood-prone areas, the more we actually encourage people to move there and to build their lives there on a sense of false security. This is probably not wise in extremely marshy, low-lying areas so close to the Gulf. Undeveloped coastal areas should probably stay that way, supporting only the existing population necessary to do the work of coastal industries.

3) Levees kill wetlands. The more levees you put down, the more cut off outside wetlands are from river water and sediment that builds them. As wetlands die, communities are closer and closer to open ocean and no protection other than the levee from storms.

and

4) Levees harm wetland ecology! Shrimp and other yummy seafood need to go from salty water nurseries to more freshwater areas in their lifespan. If you prevent this by building a levee across wetlands, you endanger all of that good seafood that keeps the people of coastal Louisiana enjoying life there in the first place.

You can't have it all-- you can't save the wetlands, build a huge levee system surrounding every small town, and live like you did before Katrina. Even if it could be done, Congress isn't going to fund it in the forseeable future; the American taxpayer won't tolerate it. You have to find a realistic balance.

If even conservative estimates are correct, the Cajun coast is most certainly going to suffer some loss in this coming century. The solution to preserving this culture is not to build a giant wall around every house that has been built. No, the solution is for strong-willed leaders to make the smart, tough decisions that achieve the most sustainability possible for the entire region.

Yesterday I asked an expert in land-use planning the following question: "Where will we get the political capital to make these tough choices? How can we grow the spine to tell tax-paying, hard-working people that their area is just too risky or that a huge levee is not the answer?"

That expert's answer? "Well, that's the big question."

My suspicion is that we if ever get that political capital, it will be through persistent education of our communities. So spread the word.