Re:Miami Will Be Underwater Soon. Its Drinking Water Could G...
by Scarblac on Wednesday August 29, 2018 @05:20PM
(#17872164)
Is that also true if the wall is say 5 km wide? (as some plans for the Netherlands propose).
Re:Miami Will Be Underwater Soon. Its Drinking Water Could G...
by irrational on Wednesday August 29, 2018 @07:36PM
(#17872998)
Of course. The sea doesn't care how wide or tall the wall is. It will just go under it no problem. If the wall were put deep into the ground until it hit bedrock (a quick google search indicates the wall would have to go down at least 20,000 feet), then the water could not get through. But I imagine at that point it would be cheaper to move the entire city.
The Netherlands has a completely different geology, so plans for one place can't be compared with plans for the other.
No. Miami (and pretty much all of South Florida) sits on top of a sand bar on top of porous limestone rock. The ocean will just come up through the limestone rock and through the sand no matter how tall your sea wall is.