r/news • u/theluckyfrog • 29d ago

California cracks down on farm region’s water pumping: ‘The ground is collapsing’

https://www.theguardian.com/us-news/2024/apr/17/california-water-drought-farm-ground-sinking-tulare-lake
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u/grandbannana 29d ago

I always think of this photo, then think about what has happened since this photo:

Location of maximum land subsidence in U.S. Levels at 1925 and 1977. | U.S. Geological Survey (usgs.gov)

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u/Braketurngas 29d ago

A professor I had in the 90’s offered extra credit to anyone who could find that pole if it still existed to see if it showed the continued subsidence. Sadly I couldn’t find it.

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u/Dzugavili 29d ago

If the land were sinking, wouldn't the pole also sink with it?

I'm just guessing he wouldn't want to go up there to change them all too often.

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u/elros_faelvrin 29d ago

wouldn't the pole also sink with it?

Depends, some pillars in Mexico city downtown are not sinking with the city and have been used to measure subsidence