Suwannee Suwannee
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What Makes North Florida Springs North Florida’S …and the isappearing ivers prings o nticing S therein… S Enticing D R ften crystal blue, butS sometimes the color ike brilliant aquamarineE gems, Florida’s natural springs adorn natural springs are always a wonder. Springs occur when water the landscape throughout the Suwannee River region, exudi n their journey to the Gulf of Mexico, most rivers in pressure causes a natural flow of groundwater ontoof tea, the Northearth’s Florida’ssurface a mystique that has lur north central Florida begin in the gently sloping As rain filters down into ed man for centuries. ng highlands of Georgia and North Florida. From there rainwater slowly dissolve the aquifer’sFloridan limestone.aquifer system, This natural can create acids large in the At once tranquil and translucent, dark and deep, these dazzling pools they wander and loop south and west before cracks, cavities and tunnels through which groundwater flows. have enticed the curious, from ancient Indians to present-day cave divers. crossing over an ancient feature known as the ofof Revered for their “healing” properties, these mineral springs onc Cody Scarp, a prehistoric shoreline that now As rainwater enters or “recharges” the aquifer, pressure is placed on the people of every race and culture suffering from arthritis, rheumatism and separates the higher elevations of the Northern water already there. This pressure moves water through the aquifer through crack other chronic conditions. Some were later converted into posh healthe attracted Highlands from the lower Gulf Coastal Lowlands. thethe to the surface ats and places tunnels, called and springs. sometimes this water flows out naturally resorts by shrewd businessmen. While crossing the Cody Scarp, rivers “sink” below the early Indian villages or Spanish missi As historic sites of earth’s surface, disappearing into the limestone caverns of When the openings are large, spring flow may these clear, natural pools today are protected and ons, many of the Floridan Aquifer before they “rise” again in the Gulf become the source of rivers such as the preserved for public recreation. uwanneeuwannee Coastal Lowlands. Ichetucknee. Other springs, such as Manatee, The Santa Fe is one such river. It sinks below the surface Fanning, Troy, and Madison Blue Cool in the summer and wa contribute nea S rm in the winter, the in O’Leno State Park and rises back to the surface three miles southwest of rly 368 million S springs attract creatures great and small, from the gallons per day to the tiny endanger the sink, just outside the Town of High Springs. The three-mile interruption in ed sand grain snail to the giant, gentle Suwannee River. manatee. Albino crayfish and shrimp, adapted only for cave existence, the river — created by the sinking and rising water — provides a natural bridge over which man and animal have crossed for centuries. navigate blindly through the underwater caverns. Gulf sturgeon, a federal When rivers flood, the pressure created by rising threatened species, use the springs as resting places during their migrati The Suwannee is the only river in the region that does not rise and fall in floodwaters causes man up the Suwannee River to spawn. relation to the Cody Scarp, although it may have done so in the past. Through Falmouth Spring in Suwanneey springs County to reverse is one flow. spring which does this regularly. on time, this ancient river has eroded a 30-foot deep channel into the limestone North Florida’s springs have a rich and fascinating past; their futu formation between the Okefenokee Swamp in Georgia and the Gulf of Mexico. to be determined. Popularity sometimes breeds problems such as erosion Springs tell us a lot about current hydrologic trends and human impacts on our water and pollution. As you visit and enjoy these natural wonde re is yet your part to preserve and protect them. Remember to stay on designated flow may indicate drought co supplies. Low spring excessive groundwater withdrawals. paths and walkways. Avoid disturbing plants and animals thatrs, please live in do and nditions, or it may signal around the springs. Take care not to discard trash on the shore or in the water. Above all, be good stewards of what Marjorie Stoneman Douglas so aptly called “bowls of liquid light.” ineaments are surface expressions es of linear geologic featur ave ountry that can be mapped C C using satellite imagery he Suwannee River valley is known to inkholesinkholes or aerial photography. SS In Florida, lineaments divers and spelunkers around the world as with the ore sinkholes occur in Florida than in any other state, and many are associatedfractures in “Cave Country.” The region’s warm climate, subsurface North Florida lakes once began as sinkholes. Sinkholes come in clear, refreshing springs and spectacular cave the limestone r.that These make systems make it one of the world’s premier all sizes and shapes. Some look like big bowls, while others look more like up the aquife arstarst shafts, or “chimneys.” Some are shallow, yet others are deep enough to lead lineaments influence the KK destinations for underwater explorers. Nearly directly to the aquifer. direction of groundwater 100 miles of underwater cave systems have flow and spring flow. opographyopography been mapped by volunteer divers since the Sinkholes are unpredictable, and may form gradually or suddenly; Each line in the map T Teep below the ground in F first Florida cave divers explored Silver Springs but they all develop in basically the same way. As rainwater seeps represents a lineament. lorida lorida has one of the largest lies a layer of porous limestone in 1953. into the ground, acid in the water dissolves the thick layers of concentrations of freshwater springs or dolostone known as the F underground limestone that underlie the entire state. This creates Aquifer. This aquifer is the primaryloridan source Expansive tunnels and cavities (“rooms”) in the world (nearly 600), and almost big, empty underground cavities. If the layers of sand and dirt of Florida’s drinking water. half of those are found within the in the underground limestone which sit on top of the limestone fall into these cavities, the largest aquifers It is one of Suwannee Basin. in the aquifer may be as tall as a 10-story the result is a sinkhole. United States, extending building and hundreds of yards across Florida and through parts Sixty-five million gallons of water per day flow across. Connected by systems of long, of Georgia, Alabama and South from each of North Florida’s 21 first magnitude adjoining passageways, these rooms often are springs because they discharge an average of 100 Carolina. Above SWALE aterater ualityuality and below the large enough for scuba divers to swim through, SINK aquifer are other layers of gravel, HOLE W Q cubic feet or more water per second. Springs are W Q sand, clay, dolom or to drive DPVs (driver propulsion vehicles) classified using a discharge ite or limestone. through. prings are a “window” into the aquifer from which they flow. The system devised by the Divers enter the underwater caves through water quality of a spring reflects the overall condition of the aquifer. United States In some places, the spring heads, sinkholes, and on rare occasions, Springs flow from the Floridan aquifer system, the source of most of Geological Floridan Aquifer’s limestone la through “swallow holes” or siphons. These the drinking water in the region. Survey in yers are thousands EXTENSIVE of feet thi openings are easily accessible to divers because ck; in ot SOLUTION 1927. hers, the layers Rock, soil and land-use characteristics in the areas that recharge the are many are located on public lands, within ACTIVITY shallow. Water is a IN CAVE AND ble to flow SPRING aquifer and springs can have an impact on water quality. Many First-magnitude springs through th LIMESTONE e limestone’s many navigable waterways, or in privately owned kinds of water-soluble materials can enter the aquifer discharge interconnected holes and empty spaces. commercial parks that encourage cave diving. when rainwater recharges the aquifer. Soluble 64 million gallons of water or more per day — The result is a unique an d complex terrain materials found naturally in groundwater include or 100 cubic feet per second that scientists call “k STREAM arst” topograp CAVERNOUS — land who hy *Note: Proof of certification by a recognized training agency UNDERWAT minerals such as iron, calcium, magnesium and se shape is in ER SPRIN fluenced by the G Second-magnitude springs discharge dissolving of und such as the National Association for Cave Diving or the he Advance carbonate. erground limesto d Stages between 6.4 and 64 million gallons of water layers. ne National Speleological Society’s Cave Diving interconn of Karst F ected passages ormations. Section is required for access to all or all of prio that form Limestone per day — or between 10 and 100 cubic feet per r sur undergr has wel Different kinds of land uses can introduce potentially cave sites. sinkholes. face draina ound drainage systemsl developed Ca ge. Overbu second ves may fo rden has collapsed which harmful soluble materials such as pesticides and nitrates. limestone rm. The land into captur Third-magnitude springs discharge ’s voids. Gi surfa cavities e much examples of caverno nnie Springs, ce has been lo forming swal Once in the aquifer, these materials can flow with the Falmouth Spr wered due to es or between 0.64 and 6.4 million gallons of water us underwater loss of Florida Geo ings and Li sand into ground water over long distances, finding their way logical Survey springs that occur in N ttle River Springs the per day — or between 1 and 10 cubic feet S.P.