Texas This I Know...

Texas This I Know...
Texas Farm to Market Road

Friday, September 02, 2005

The Lost City of New Orleans?


Think the people of New Orleans did not know what they were in for if a hurricane should hit the city? This eerily prophetic article titled "The Lost City of New Orleans?" was written in 2000. Some of it's highlights are excerpted below.


Louisiana's marshlands, the only buffer for hurricanes that come out of the Gulf, are slipping into the ocean at an alarming rate. New search indicates that just one major hurricane could put New Orleans under water.
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Research by the U.S. Geological Survey indicates that New Orleans is sinking faster than many realize and could be under water within 50 years. The city is facing a series of issues--disappearing wetlands that protect from hurricanes, levees that are too low to hold back flood waters, rising water tables, to name a few--that if not addressed soon could have New Orleans suffering the same fate as Atlantis.
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New Orleans sits on a bed of silt, sand and clay, which historically has been rebuilt with each flooding; new silt and sand are deposited when the river floods. But the levees that protect the city from flooding also prevent the rebuilding of the silt. As a result, New Orleans is sinking at a rate of one-third of an inch per year, which is not good for a city that is already eight feet below sea level.
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Pumping water from the soil has become a standard requirement for new construction. Drainage canals must be constructed for most regions within New Orleans. Yet even taking the water away creates a problem. "By putting in the drainage canals, you begin to drain the area," says McManis. "As you lower that water level, it adds additional weight to the surrounding soil. As a result, the soil begins to condense and cause down movement in the soil itself." The ground sinks even more.
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If it were left to residents and city officials, the status quo would prevail. One city official says of the flooding and subsidence, "We are below sea level and we do get floods sometimes, but it's not a real serious problem. You can still purchase flood insurance." Another city official expressed faith in the current levee system.
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"We need to bite the bullet as a society and say that we have a problem. Our coastline has 40 percent of our nation's wetlands and 80 percent of the loss occurs here. New Orleans needs a wake-up call. The city is on the verge of becoming extinct."

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