Quote:Well, way back when, New Orleans wasn\'t under Sea Level.

However, they only recently figured out that it was all the silt drifting down the Mississippi that helped keep the shores built up.

It didn\'t help that they massively reduced the amount of silt flowing down the river.

Another problem was the wetlands. The wetlands were also recieving some of the silt. They built a natural barrier between NO and the rivers and gulf. But the rate of Growth to Decay of them declined to the point where they were losing more then they could gain. So the natural protection barrier wore away.