exactly what has happened to New Orleans. I believe the article actually predates last November, but was only then posted to this website. . .
http://www.colorado.edu/hazards/o/nov04/nov04c.html Disasters Waiting to Happen . . . Sixth in a SeriesWhat if Hurricane Ivan Had Not Missed New Orleans?------------------------------------------------------------------------
Author’s Note: This column was originally intended to be the final disaster in the “Disasters Waiting to Happen” series. As I was developing the hypothetical situation depicting a devastating hurricane striking New Orleans, Louisiana, the disaster waiting to happen threatened to become a reality: Hurricane Ivan, a category 4 hurricane (with 140 mph winds) fluctuating to a category 5 (up to 155 mph winds), was slowly moving directly toward New Orleans. Forecasters were predicting a one-in-four chance that Ivan would remain on this direct path and would be an “extreme storm” at landfall. In reality, the storm veered to the north and made landfall east of Mobile Bay, Alabama, causing devastation and destruction well into the central Gulf shoreline and throughout the Southeast and the Mid-Atlantic states.What if Ivan Had Hit New Orleans?New Orleans was spared, this time, but had it not been, Hurricane Ivan would have:
* Pushed a 17-foot storm surge into Lake Pontchartrain;
* Caused the levees between the lake and the city to overtop and fill the city “bowl” with water from lake levee to river levee, in some places as deep as 20 feet;
* Flooded the north shore suburbs of Lake Pontchartrain with waters pushing as much as seven miles inland; and
* Inundated inhabited areas south of the Mississippi River.
Up to 80 percent of the structures in these flooded areas would have been severely damaged from wind and water. The potential for such extensive flooding and the resulting damage is the result of a levee system that is unable to keep up with the increasing flood threats from a rapidly eroding coastline and thus unable to protect the ever-subsiding landscape.
(more. . . much more)