In this section
Barrel Spring is a fourth-magnitude spring. Further investigation is required to identify seeps and sand boils and to resample for water quality.
Discharge at Barrel Spring was measured by St. Johns River Water Management District three times from 1995 to 1997. The mean and median discharges for the period are 0.25 and 0.27 cubic feet per second, respectively (see the table below).
Barrel Spring was sampled four times by the district from 1995 to 1997. Summary statistics of the water quality data for selected variables are shown in the table below.
Summary statistics of water quality and discharge at Barrel Spring
|Alkalinity, total, mg/L as CaCO3||94.0||97.1||97.2||100.0||4||1995−1997|
|Calcium, total, mg/L as Ca||29.7||31.4||32.0||32.0||4||1995−1997|
|Chloride, total, mg/L as Cl||8.0||9.2||9.0||11.0||4||1995−1997|
|Fluoride, total, mg/L as F||0.24||0.25||0.25||0.26||4||1995−1997|
|Magnesium, total, mg/L as Mg||8.3||8.9||9.0||9.1||4||1995−1997|
|Nitrate + nitrite, total, mg/L as N||0.04||0.05||0.05||0.06||4||1995−1997|
|Orthophosphate, total, mg/L as P||0.03||0.04||0.04||0.04||4||1995−1997|
|Potassium, total, mg/L as K||1.2||1.3||1.2||1.4||3||1995−1997|
|Sodium, total, mg/L as Na||6.0||6.4||6.2||7.0||4||1995−1997|
|Specific conductance, field, µmhos/cm at 25°C||245||251||252||256||4||1995−1997|
|Specific conductance, lab, µmhos/cm at 25°C||252||252||252||252||1||1996|
|Sulfate, total, mg/L as SO4||19.4||21.1||21.0||23.0||4||1995−1997|
|Total dissolved solids, mg/L||145||148||147||151||3||1995−1997|
|Water temperature, °C||21.7||23.7||23.6||26.0||4||1995−1997|
mg/L = milligrams per liter
cfs = cubic feet per second