St. Johns River Water Management District St. Johns River Water Management District St. Johns River Water Management District St. Johns River Water Management District St. Johns River Water Management District St. Johns River Water Management District
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Water bodies, watersheds and storm water
Nova Spring main view

Nova Spring main view
photo courtesy FGS

Nova Spring

Seminole County

Description

Nova Spring is a third-magnitude spring submerged in the center of the eastern channel of the Wekiva River. The spring head is a circular pool about 20 feet in diameter, and the sand boil is approximately 25 feet down from the water’s surface. The discharging water can be seen as a boil over the spring opening, then flowing northward down the river. Semitropical forests and private residences line the banks of the Wekiva River near the spring.

Discharge

Nova Spring run

Nova Spring run

Discharge from Nova Spring, measured in 2005 by St. Johns River Water Management District, was 8.52 cubic feet per second.

Water quality

Nova Spring was sampled twice by the district in 2005. The water quality data for selected variables are shown in the table below.

Summary statistics of water quality and discharge at Nova Spring

Nova Spring Min Mean Median Max Count Period
Discharge, cfs 8.52 8.52 8.52 8.52 1 2005
Alkalinity, total, mg/L as CaCO3 114.0 117.0 117.0 120.0 2 2005
Calcium, total, mg/L as Ca 140.0 154.5 154.5 169.0 2 2005
Chloride, total, mg/L as Cl 680.0 819.5 819.5 959.0 2 2005
Magnesium, total, mg/L as Mg 52.1 59.6 59.6 67.0 2 2005
Nitrate + nitrite, total, mg/L as N 0.12 0.12 0.12 0.12 1 2005
Orthophosphate, total, mg/L as P 0.04 0.05 0.05 0.06 2 2005
pH, field 7.10 7.12 7.12 7.14 2 2005
Phosphorus, total, mg/L as P 0.06 0.10 0.10 0.14 2 2005
Potassium, total, mg/L as K 8.8 10.0 10.0 11.3 2 2005
Sodium, total, mg/L as Na 353.0 420.5 420.5 488.0 2 2005
Specific conductance, field, µmhos/cm at 25°C 2843 3230 3230 3616 2 2005
Specific conductance, lab, µmhos/cm at 25°C 2900 3240 3240 3580 2 2005
Sulfate, total, mg/L as SO4 350.0 364.5 364.5 379.0 2 2005
Total dissolved solids, mg/L 1160 1445 1445 1730 2 2005
Water temperature, °C 24.2 25.7 25.7 27.2 2 2005
Units: µmhos/cm = micromhos per centimeter
         mg/L = milligrams per liter
         cfs = cubic feet per second

Age of discharge water

The age of water discharging from Nova Spring was determined by measuring the concentration of tritium, delta carbon-13, and carbon-14 in the spring discharge, which was measured in March 2005. Nova Spring had a tritium concentration of 0.31 tritium units, which suggests that the water is about 60 years old. Nova Springs had a delta carbon-13 value of −8.06 parts per thousand and a carbon-14 concentration of 16% modern carbon, which results from the mixing of Upper and Lower Floridan aquifer water. The Fontes and Garnier (1979) carbon-14 age of Nova Spring is 5,700 years old.

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St. Johns River Water Management District
4049 Reid Street, Palatka, FL 32177
(800) 725-5922