SWS2007

In some regions of the state, groundwater flow directions have been altered by heavy pumping of the aquifer

More than one half of all of Florida's groundwater withdrawals are for domestic use

Sinkhole lakes are an important source of recharge for the Floridan aquifer

The upper confining unit for the Floridan aquifer is derived from carbonate precipitation beginning about 25 mya

Subsidence sinkholes generally have a thin layer of sand over limestone

Spring formation is not impacted by elevation differences in the aquifer

The principal source of carbonates for the Florida platforms from the shells of marine invertebrates

The most frequently reported sinkholes are cover collapse sinkholes

The Floridan aquifer is confined and consolidated

Excess pumping from aquifer systems rarely have an impact on Florida lake levels

Sinkholes are responsible for the majority of lake formation in Florida

Rainfall is naturally acidic

High elevations correspond with high numbers of sinkholes and sink lakes in Florida

Springs forms best where the confining unit for the aquifer is thin

Limestone is made porous by acid dissolution of the solid rock

Water in the Florida is under pressure

Much of the recharge in the Floridan occurs in the central part of the state

The Floridan platform was dominated by carbonate deposition for approximately 125 mya

The upper confining layer for the Floridan aquifer is derived from Appalachian erosional sediments

Florida is characterized by Karst landscapes because it is extensively underlain by granite

Collapse sinkholes require a thick layer of clayey material over the limestone

Water in the Floridan moves generally from the center of the state towards the coasts

Most of the recharge of the Floridan occurs near the coast

About 80% of all water withdrawals in florida is derived from groundwater sources

Calcium chloride is a principal component of limestone

Some of the highest elevations in the peninsular part of Florida are found near the center portion of the state