alt Hacker NewsOh hey, something I used to work on. The story here is coastal erosion / land subsidence much more than it is sea level rise, although that is a contributing factor. The land subsidence has been caused by Engineering works of the past, including the construction of levees and floodwalls around the city. When I worked on this a decade ago, we were already telling people outside of the city to move and spending a fortune to protect people inside the city. The most cost-effective option is often getting people to move, but good luck convincing everyone. Also this is such a shame because New Orleans is one of the most unique, charming places in the US.
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sixothree • today at 2:39 PM
Didn't the governor famously cancel coastal restoration programs?
New Orleans is on a river delta, and without human effects on land, and without sea level rise, wouldn't one expect this delta to expand due to silt deposition?
And would this silt deposition actually occur at a rate that would fully counteract sea level rise, just as the huge rise in sea levels at the end of the last ice age did not mean that the delta disappeared?
If so, the danger to New Orleans would be entirely avoidable by changes in local land use.
Perhaps the fundamental issue is that river deltas tend to be dynamic, with the watercourse continually changing, which isn't really compatible with a city in a fixed location. (Hence the damaging attempts at stopping this.)