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Originally posted by Brahmanite
Sounds to me like this is due to the freezing and then thawing of the ground. When the water in the soil (or anything else) freezes it expands. The more water there is in the soil the more it will expand, seeing that a lot of land in Florida is essentially just water that was "filled in", the ground there probably expanded quite a lot. Think if a can of soda left in the freezer, eventually the can will explode.
I have seen this happen many times, specifically in spots where there had been potholes filled. After a freeze it seemed like the "filler" for the potholes had never been put in.
But the strawberry is the crop for which Plant City is most widely known. The majority of the winter strawberries in the U.S. are grown on 8,300 acres of farmland surrounding Plant City. This area, rich in minerals and fertile soil, has a history of prosperity and promise that precedes the Civil War era.
The sinkholes have mostly been appearing since Monday in Hillsborough and Polk counties, where groundwater levels plummeted as farmers pumped millions of gallons of water to protect oranges and strawberries from freezing temperatures.
The aquifer level in some places fell 60 feet since the string of freezing nights started, said Robyn Felix, spokeswoman for the Southwest Florida Water Management District.
Originally posted by savageheart
This is some serious stuff! I wonder if any precautions are being taken at Walt Disney World which is surrounded by water, not to mention all the underground tunnels and what not. I sure would hate to see Mickey and pals end up down the drain!
Originally posted by l neXus l
they are totally responsible for the sinkholes
Originally posted by Pharyax
I live in Lakeland, so I know all about the ice to protect the crops. Even went to a strawberry fest a few times.
Once we get some more rain (which it does all summer) we'll be fine..
BTW, 2 massive sink holes emptied an entire LAKE a few years ago.. this was quite a large lake too.. It was surreal seeing docks on dry land.. (many still are) it's not quite back to full levels yet.. The hole filled up..
Originally posted by inthesticks
Florida sits on top of caverns of limestone, carbonate rock, salt beds, and dolomite, all of which dissolve, crack and break as water moves through the soil. As the water moves through the soil, it becomes more acidic and these formations start to crumble and cave in.
This is just a natural geologic formation in Florida. When I was a drilling fluids engineer back in the 80's, we drilled a number of wells in the Everglades and always drilled through underground caverns. Back then, the land didn't collapse into the caverns below, but all the development has caused changes on the surface, and the weight and load on the soil.
It's kinda like a house with a flat roof that collects 4 or 5' of snow. The weight of the snow overwhelms the roof and it collapses. Florida sits on top of underground caverns and the weight of all of the development and such is more than the "roof" of the underground caverns can hold up, so they collapse.