I want to tell you guys, I find this thread quite uplifting. People trying to find solutions instead of placing blame (yes, Ive got thoughts on that, too, but Ill save them for another thread).
Im not an engineer (in fact, when I was a kid, Dad said, Deb, get away from that wheelbarrow, you dont know nothin about machinery!)
Anyway, I found these two pics. One is a satellite shot before the flood, the other is a diagram showing what areas lie above & below sea level. I thought it was interesting.
I put these two together in photoshop, but if anyone wants to see the larger, originals, I can post them.
This just kind of lets you know the logistics of how this city became so swamped.