And, finally (for this evening anyway), I give you a well-written article from Geology.com.
It opens with, “The impact of Hurricane Katrina on the city of New Orleans has been called the most anticipated natural disaster in modern American history.”
I believe it.
In any event, the article deals with the fact that there have been 17 hurricanes of Category 3 or better that have made landfall within 100 miles of New Orleans since 1852. The tracks of those hurricanes are shown on a map in the article.
It would seem to me that New Orleans has been exceedingly lucky in that it existed for as long as it did.
Even for all that, the article notes that subsidence and rising sea levels may be the bigger threat. From the article…
"The US Geological Survey has published a report titled: “Sea-Level Rise and Subsidence: Implications for Flooding in New Orleans”. A USGS preface for this report:
“The rates of subsidence and sea-level rise are important considerations in the restoration of the city of New Orleans and the wetlands that protect it. New Orleans is sinking two inches per decade, and it is anticipated that it will sink roughly one meter in the next 100 years relative to mean sea level. The ocean is also rising. During the last century, the ocean rose one to two millimeters per year. Within the next century if nothing is done to modify the existing infrastructure, some areas of the city that did not flood as a result of Hurricane Katrina will likely flood in a future storm due to subsidence and sea-level rise.”
“Stating the above in clear language: within the next century, New Orleans will sink about one meter and sea level is likely to rise another one to two meters. This places New Orleans at an additional two to three meters below sea level by the end of this century. Continued subsidence and sea-level rise will demand a continuous upgrading of the levees and pumping systems to sustain the city.”
“This could be a greater risk to New Orleans real estate than the hurricane threat. As subsidence and sea-level rise continue, the costs of protecting the city from seepage and storms will become more expensive than practical. Who should pay the costs of this losing battle? How long will government foot the bill? Anyone who owns or plans to purchase New Orleans real estate should understand the subsidence and sea level rise risks.”
That makes it pretty clear, I think.
The article continues on to mention levee security and how the levees could be at risk from a terrorist attack. That’s a factor I certainly can’t assess, so I won’t mention it any further.
And, now, to reflect wayyyy back to the OP, “Is New Orleans doomed?”
My answer: Yes. Within 100 years. Quite possibly sooner.
On preview, I see Ivorybill’s refusal to debate once again. Very well. It’s understandable. He cannot, and will not, support himself.
I’m not that interested in pitting you, my friend. You’ve shown your true colors in this thread well enough. When you finally reached a forum where you’d be called on to justify yourself, you’ve proven unable to do so. Why would I waste further time pitting you? You have no defenses.
I leave it to the readers who’ve slogged though all of this to determine whose statements stand up under scrutiny.
And with that, if the mods and the OP think it has gone on long enough, I have no objection to closing this thread. It’s like bashing my head against a wall anyway.