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Friday, May 08, 2009

Geologists worry about drought's effects on sinkhole season

In Print May 08, 2009 - St. Petersburg Times
Florida is on the verge of its annual sinkhole season in late spring and early summer, and this year could see more activity because of the effects of three years of drought, geologists say.

Water in the aquifer supports layers of clay and sand on top of limerock, said Tony Gilboy, a geologist with the Southwest Florida Water Management District. That buoyancy effect disappears when levels in the aquifer drop, Gilboy said. After many months of drought, aquifer levels in the district's northern region were more than a foot and a half below the normal range last week.
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