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Old 12-20-2014, 08:14 AM
 
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Cities such as Mexico city are sinking into the ground. is there anyway to prevent addition sinking, or will the city be doomed? other cities in the US are sinking slowly as well, such as coastal parts of Philly, Baltimore, etc. is there any way to stop this sinking from continuing?
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Old 12-20-2014, 09:31 AM
 
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Mexico is somewhat unique in that it's built on what was essentially a lake. Consequently as anyone who's spent time in Mexico knows full well, it is mostly a low rise city.

Most cities don't have that particular problem and therefore aren't sinking.
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Old 12-20-2014, 10:49 AM
 
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^ isn't the east coast sinking though due to land subsidence? from the post glacial rebound effect. canada is going up, while the east coast is going down. won't this affect philly, DC, new york, etc?
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Old 12-22-2014, 05:41 PM
 
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Polymers or concrete aggregates can be injected at high pressures to alleviate subsidence. I'm not sure how practical this is over several square miles though.
For an area like the historic areas of New Orleans, it could make sense. Other than that, storm surge barriers and levees are about all that can be done.

Cities will need to pick their battles in terms if what must be protected vs what needs protecting. They may not be able to keep everything, so there will need to be some form of "strategic retreat".
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Old 12-22-2014, 06:28 PM
 
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Quote:
Originally Posted by gottaq View Post
^ isn't the east coast sinking though due to land subsidence? from the post glacial rebound effect. canada is going up, while the east coast is going down. won't this affect philly, DC, new york, etc?
land subsidence from post glacial rebound effect? When you bring in tectonic forces like this you're talking tens of thousands of years.. .I think we're good for a while.
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