I didn't know about the barges but I did know that levee damage was what caused the flooding.
French Quarter above sea level? I remember commentators saying New Orleans in its entirety is something like 20 to 25 feet below sea level. (I don't know, never looked it up, just going by what was reported). Not going to argue the point, you seem to have a pretty good grip on the details, just stating what I heard...
Reading your reply reminded me of things I hadn't thought of in a while, I can't find my Geology book, it's packed away somewhere in a box, and I've wanted to dig it out for a while and look up things I'm fuzzy on. I had only read it about 3 times when I moved and still hadn't absorbed a lot of it. Really interesting stuff though, especially when you have a chance to apply it to real world events. The seemingly minor aspects take on a different perspective when you try to look at the wider view.
What worries me, geologically, is what is happening with climate (not to be confused with environment). In the past couple of mini ice ages, as they are being called, geological activity increased greatly, some of the most disastrous earthquake and volcanic activity has been during those periods. I'm seeing indications of it starting up already. The earthquakes in south America, volcano in Nepal I think it was, Hawaii and Japan acting up as always, and one that should really worry people, Yellowstone is a caldera volcano, or super volcano, and is long overdue for an eruption. Geologists also found out not too long ago by modernized sonar, the lava pool below it is much larger than thought before, and shallower. If...or when actually, Yellowstone erupts, it will be a disaster on a scale never before seen by humans, except maybe the one that buried Pompeii. And nobody really remembers that one. We just see the evidence and can only imagine the first hand event..
That's why the "climate change" hoax is worrying me. The truth is we're headed into at least 30 years of harsh winters, cooler climate in general, due to a reduction in solar activity, and according to what I've seen so far, it looks like this one could be worse than the last two by far. Sunspots are almost nonexistent already, and it's only a few years into the process for this cycle. Solar activity could drop below any historic records, and that has always coincided with greater geologic activity in the form of major earthquakes and volcanoes.
It will also very seriously affect the world's food supply, because in a few more years, if it keeps going, crops that now do well will no longer perform in the same geographical areas. Corn, for example, is all you see for 200 miles in North and South Carolina. In the not so distant future, it will refuse to grow there and we'd better be ready to start planting it in the gulf coast states, if it will actually do well enough there. I'm not too familiar with where else the corn belt is, but the whole thing will have to go hundreds of miles south to grow at all, the overall conditions will be too cold where it is now. That's what caused the famines during Napoleon's time. And his failure in his attempt to conquer Europe.
We're about to see the same thing happen again, and it is a regular cycle, not something caused by man. Yes we have affected the environment, but that's a totally different story than climate. Or weather. Weather is a day to day issue, climate is the overall long term view, independent of weather. Environment is still another story.
I'm also wondering what affect all the immense deforestation will have. According to what I've seen reported, huge areas of South American rain forest are long gone, mostly to make way for cattle grazing, to supply beef for places like McDonald's, the world largest beef purchaser. I suspect it won't be for many years we understand the overall impact of that. Erosion, wildlife and species extinction, changes in the course of waterways perhaps? I don't know. I do expect it to have a much greater impact than anyone may suspect so far.
Same for oil production. That oil was there for a reason, now we're pumping it out of the ground. What unknown geological affects are in progress right now that we have never even dreamed of? Ever see a mole tunnel running across your yard and step on it? What will happen with the large cavities left where oil once was? I read in the Geology book that when Lake Meade was filled to create a reservoir for Las Vegas, they had earth quakes for several years until everything settled in, the weight of all that water suddenly there where it had never been caused the plates underneath to shift to accommodate the strain. What is happening right now due to the removal of all that oil? A lot of people claim fracking does not cause earthquakes. Nonsense, it was proven in the early 70's when the Army decided to pump toxic waste deep underground mixed with water in Colorado. Within 6 months the earthquakes started, and they didn't finally stop until they stopped pumping water into the ground. Fracking is not only pumping water into the ground, but actually setting off underground explosions to fracture the bedrock and allow the collection of oil. Literally everywhere I know of that fracking is done, earthquakes have been reported.
Scary stuff. It might be getting us some oil, but I am definitely not a fan of fracking. I've had a dubious opinion of traditional oil drilling for a long time, as in ever since high school, because it seems you would have to have some kind of trade off when you pull millions of barrels of oil out of the ground. Aside from the waste produced, that seems to be a problem as well.
The biggest problem is that so far, we have no affordable replacement...solar and wind power both produce electricity, but neither is reliable or affordable. As far as I can find out, all of the solar farms are losing money, and don't produce a speck of power at night. Wind farms don't seem to be making much profit, can't operate during periods of no wind or too much, and only produce something like 10% of total electricity demands so far. And both are much more expensive. Solar panels have about a 10 year life span and solar farms are killing birds and blinding pilots, wind farms take up huge plots of real estate and require some expensive maintenance, and neither is reliable. Nothing else is even remotely feasible right now.
And of course I've strayed pretty far off topic...but the overall picture worries me. Climate change is a fact, and a natural occurrence that has been in progress since long before dinosaurs existed. But the current shift in climate is exactly the opposite of what fools like Al Gore are predicting. If current trends continue, remember that the past 3 winters have been both harsh and bizarre. Atlanta frozen over for the first time in recent memory, cars stranded on the freeways for a week. Record snowfalls in the northeast 2 years in a row. Snow right here in my yard, 3" of it, and on the ground for almost a week, I've never seen that in Texas or Louisiana in my life. Usually we get an inch, it's gone by the next morning. The only exception was 1972, when I built a snow woman with a friend and someone snapped a picture that ended up in the local newspaper, it was still standing the next afternoon. Yes, a snow woman, an impulsive idea that ended up in the news...but that's the only time I remember snow ever lasting more than one day in Louisiana. In central Texas, Bryan College station area, we had about an inch that was on the ground for 2 days, that's it, that was about 1980 or so. Other than that, snow has never stayed more than a day and rarely more than an inch. But in the winter of 2013, we got 3 inches here in my yard and it was almost a week before it all melted. 2014 Atlanta froze over and was a disaster for a week, 2014 and 2015 record snowfall all over the northeast.
Get ready for lots more...climate change is here and it ain't getting warmer...
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