New Orleans is built on the outside bank of a meander where there is deep water for a river port.?

Question

What causes deep water in this position?

Answer 1

When looking at a meandering river, erosion is usually higher on the outside bank.  This is due to the force of the water moving around a bend.  Water on the outside of a bend in the river invariably moves faster than the water on the inside of the bend. A greater speed causes a greater ability to erode the bank on that side. It also increases the ability of the water to transport sediment.

Next time you look at a meandering river, take note that because a lower speed reduces the ability to transport sediment, the inside bank is normally just above the surface while the outsides of meanders are usually more vertical.

Answer 2

Sediments...

New Orleans is built on a layer of soft sediments. As no more sediments can be deposit there (cause the streets and buildings), and as those sediments are gradually losing their water, near all the city were deeping, below the sea level.

Answer 3

The second answer is correct about the effects of a meander.

However, the reason the water is so deep at New Orleans is due to the volume.  The Mississippi River collectes runoff from 35 states and the volume of water is enormous. The river is very deep rather than wide, and the depth allows it to handle the volume.