17 Recharge and Flow 5

17 Recharge and Flow 5 - The water-bearing unit is marked...

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Artesian Aquifers Produce Springs Water under pressure breaks through upper confining layers producing water at the surface
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Thin confining layer Thick confining layer Groundwater
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Thin sandy overburden Springs Form Best Where the Confining Layer is Thin Groundwater
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Florida’s Springs Form at low elevations where the upper confining unit is thin or absent (64.6 million gallons per day) Thin or absent 30 – 200 ft sandy 30 – 200 ft clayey > 200 ft thick Hawthorne Thickness 27 of 78 First Magnitude Springs Nationally
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Ginnie Poe Spring http://www.underwaterflorida.homestead.com/springs.html   Manatee Juniper Homosassa
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Summary The Floridan Aquifer is under confined conditions
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Unformatted text preview: The water-bearing unit is marked by dissolution cavities Dissolved limestone caves and cavities create karst conditions Karst is characterized by depressions, sinkholes, lakes, springs Subsidence and collapse sinkholes produce numerous lakes Lakes often maintain hydrologic connection with the underlying limestone and can function in recharge for the aquifer Much of the recharge occurs at higher elevations leading to a generalized movement of groundwater to lower elevations Water under pressure at lower elevations can discharge at the surface as springs, particularly when confinement is thin...
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This note was uploaded on 02/17/2011 for the course SWS 2007 taught by Professor bonczek during the Fall '09 term at University of Florida.

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17 Recharge and Flow 5 - The water-bearing unit is marked...

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