Data show relationship between rainfall and groundwater levels

A map illustrates rainfall conditions across the St. Johns River Water Management District.

PALATKA, Fla., July 9, 2019 — Data collected in June by the St. Johns River Water Management District show groundwater conditions somewhat mirror the varied rainfall patterns measured across the district during the previous three months.

Data for June show above-average rainfall in the central region, with below-average rainfall in the northern counties. Upper Floridan aquifer conditions remain in the normal or high range for this time of year, however, the patterns of high and low rainfall are beginning to be reflected in increasing and decreasing groundwater levels.

• Seminole County received the most rainfall, with 10.6 inches. Volusia, Alachua, and Marion counties also received above-average rainfall, with each county receiving between 8 and 9 inches of rain.
• Rainfall in counties in the northern portion of the district measured well-below average, with Nassau, Baker and Duval counties measuring less than 5 inches of rain during June.

Districtwide, the 12-month rainfall total is now 4.2 inches below the long-term average, with a similar spatial pattern as that seen in the monthly rainfall.

For additional hydrologic data visit www.sjrwmd.com/data.