Another project would cut a new navigation channel into the Mississippi before it branches south, allowing sediment to build up in what's left of the delta.

FORBES: Port in a Storm

They showed that the levees along a navigation channel east of the city, known as the Mississippi River Gulf Outlet, sank at five-times the average rate for the rest of the city.

NPR: Satellite Imagery Shows a Sinking New Orleans

The Army Corps of Engineers also has being dredging in the area to deepen the channel and help navigation.

CNN: STORY HIGHLIGHTS