"The Wogster" <> wrote in message
news:zCHRe.9836$...
> What is well known is that you have a city, that is between a lake and
> the ocean, and is in a potential hurricane zone, and is below both the
> ocean and lake water levels. This may be a dumb question, but didn't
> anybody think that at some point this might cause a problem?
Yeah, it's old news. John McPhee wrote a book about it (really, about the
hydrology of the lower Mississippi in general). Evidently, Men's Health
magazine has a brief article about it in this/last month's issue.
If you want to vote in an unscientific poll, try
http://blogs.chicagotribune.com/news_columnists_ezorn/
What should be done with New Orleans?
a.. Fix the levees, pump the city out, clean it up and build it back right
where it was.
b.. Allow it to remain the swampland that nature intends and spend all
that money to re-build elsewhere.
At last count, it's 21% fix, 79% swamp. But these aren't people in the
affected area, but mostly people located several hundred miles away who are
sick and tired of hearing other people wonder how they can stand the Chicago
winter.
But as with most questions, the New Orleans question is not that simple. New
Orleans evolved there over the last 400 years (just as it evolved to being
below sea level -- it obviously didn't start there as a sort of Instant
Atlantis). There are a lot of business and economic reasons to have a city
in/near that spot that aren't obsolete. Does New Orleans make any less
sense than boom cities in the West, where they don't have ENOUGH water?
> Perhaps the best solution is to knock everything down, add in the rubble
> from surrounding areas (like Biloxi), then add clean fill until the ground
> is about level with the top of the levee, then build a new city on-top of
> the now raised ground level.
A somewhat similar thing was done to Chicago. The city was raised to ease
flooding and disease. See
http://en.wikipedia.org/wiki/Chicago
"Early Chicago was also plagued by sewer and water problems. Many people
described it as the filthiest city in America. To solve the problems, the
city initiated the creation of a massive sewer system. In the first phase
sewage pipes were laid across the city above-ground, with gravity moving the
waste. The second phase, executed in 1855, involved raising the level of the
city by four to seven feet (one to two meters); this was done by jacking up
buildings and placing fill in order to raise streets above the swamp and the
newly-laid sewer pipes.
By 1857 Chicago was the largest city in what was then known as the
Northwest. ... over 90,000 people."
To solve more disease/drainage/navigation problems, four rivers (Grand
Calumet, Stony Creek, Chicago, and Little Calumet; see
http://pages.ripco.net/~jwn/chicago.html ) had their flow reversed. This
probably won't work for the Mississippi ;)
The general point I'm trying to make here is that proper engineering is a
wonderful thing, and if there is a good enough economic reason to have a
port city near where a gigantic river system draining half a continent meets
the second largest ocean in the world, we possess the engineering to allow
this.
If humanity had a pattern of abandoning cities after natural and
man-inflicted disasters, how many would we have lost? Chicago for sure (1871
fire), San Francisco after the earthquake, London after the plague, large
portions of the Netherlands, etc. It doesn't generally make economic sense
to do things like this, and we usually don't do it. For sure, though, it
makes sense to learn from the past and better engineer the future.