SJRWMD slide 1 SJRWMD slide 2 SJRWMD slide 3 SJRWMD slide 4 SJRWMD slide 5 SJRWMD slide 6
SJRWMD logo for print -

Water bodies, watersheds and storm water

Anatomy of a spring

A spring is “a point of focused discharge of groundwater” — it is an area on the earth’s surface where groundwater discharges to become surface water.

Some springs are large enough to create a spring-run stream, which is a distinct river system fed by the flow of the spring. Some spring-run streams in the district include Silver River, Alexander Spring Creek and Wekiva River. Other springs (such as Blue Spring, Welaka Spring, Green Cove Spring) contribute to the flow of the St. Johns River and other large rivers.

Slide show automatically advances.
Click number to manually advance.

Spring pool
Spring pool

A small body of water, either artificially impounded or naturally occurring, that encompasses one or more spring vents.

St. Johns River Water Management District
Spring boil

A discharge from a spring in which water pressure is great enough to cause a turbulent discharge (the “mound” or “upwelling” of water over the spring vent).

St. Johns River Water Management District
Spring vent

An opening that concentrates groundwater discharge at the earth’s surface, including the bottom of the ocean.

Spring cave

A natural underground opening or series of openings and passages large enough to be entered by an adult person.

Limestone matrix
Limestone matrix

The layers of limestone (sedimentary rock) underground form the “container” for the water that constitutes the Floridan aquifer. This circulation of water in the main aquifer feeds many of Florida’s springs.

Spring run
Spring run

A body of flowing water that originates from a karst (porous limestone) spring and whose primary source of water (greater than 50%) is from the spring.

Spring run habitat
Spring run habitats

Important habitats (living and feeding space for aquatic fauna) in spring runs include beds of submerged aquatic vegetation (also known as SAV) and submerged trees (known as snags). These provide shelter and feeding areas for many species of invertebrates, fish, turtles, birds and mammals.


In this section
More about


Governing Board meetings
Please see agendas for specific meeting times, which may differ monthly.

Lobbyist registration requirements

Other district meetings and notices

Central Florida Water Initiative

Tell us how
we are doing.

Take our survey on
customer service.

By accessing this site, you agree to accept terms and conditions of the district’s liability disclaimer.

Employee Portal

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