It isn't rocket science. There are four threats to NOLA - hurricane flooding, river flooding, subsidence and a channel shift. Moving the city between the Mississippi and the Atchafalaya would deal with all four. I imagine folks a lot smarter than me have already figured that out and other folks smarter than me are more than capable of designing it and building it. But first we have to take the collective lot of politicians who turned a property catastrophe into a humanitarian catastrophe and somehow give them brain implants so they can do the rebuilding right once.