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Monday, June 29, 2009

Louisiana's Marshes Shrink Inexorably

Desperate to halt the erosion of Louisiana’s coast, officials there are talking about breaking Mississippi River levees south of New Orleans to restore the nourishing flow of muddy water into the state’s marshes.

But in a new analysis, scientists at Louisiana State University say inland dams trap so much sediment that the river no longer carries enough to halt marsh loss, especially now that global warming is speeding a rise in sea levels.

As a result, the loss of thousands of additional square miles of marshland is “inevitable,” the scientists report in Monday’s issue of Nature Geoscience.

link: Dams Are Thwarting Louisiana Marsh Restoration, Study Says -


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