In this section
Nova Spring main view
photo courtesy FGS
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.
Nova Spring run
Discharge from Nova Spring, measured in 2005 by St. Johns River Water Management District, was 8.52 cubic feet per second.
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
|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|
|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|
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.