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Your Questions Answered
March 2022
Q: Is there a rainy season and dry season in central Florida?
A: Yes, rainfall is seasonal. Our rainy season is a four-month period from June through September, with average rainfall of about 7.8 inches each month. About 60 percent of our average annual rainfall is received during that time. The higher rainfall results in rising water levels in wells, lakes, rivers and springs… Read more
In 1987 the Florida Legislature created the Surface Water Improvement and Management (SWIM) Act to protect, restore and maintain Florida's highly threatened surface water bodies. Under this act, the state's five water management districts identify a list of priority water bodies within their authority and implement plans to improve them. The District's SWIM ProgramThe Southwest Florida Water Management District's Surface Water Improvement and Management… Read more
Highlights
- Largest natural lake in Hillsborough County with a surface area of greater than 800 acres
- Popular for recreational use as it is one of the few natural lakes in the area with public access
- Discharges into the Hillsborough River which is used for municipal water supply for the City of Tampa
- Nutrient loadings from the watershed have caused extreme…
Highlights
- Weeki Wachee Springs are the headwaters of the Weeki Wachee River
- The headspring is home to Weeki Wachee Springs State Park, which features a water park and the famous underwater mermaid show
- Located in Hernando County
- First magnitude spring: 260-square-mile springshed
- Potential decrease in historic flows
- Elevated…
Sinkholes are a common naturally occurring geologic phenomenon and one of the predominant land forms in Florida.Many of the lakes in Florida are relic sinkholes. Sinkholes can be classified as geologic hazards sometimes causing extensive damage to structures and roads resulting in costly repairs. Sinkholes can also threaten water supplies by draining unfiltered water from streams, lakes and wetlands directly into the aquifer (underground water supply). What if a… Read more
To help achieve its mission, the District promotes behaviors that conserve and protect water resources. Social research can provide information that helps staff design programs that more effectively lead to sustainable behaviors.
Not only can social research be used for designing more effective programs, but it can also be used for evaluating those programs. A survey conducted before an educational campaign, for instance, can set a benchmark for what people know, believe… Read more
Interactive Map Gallery
The District’s new map gallery contains dynamic, interactive maps created by District staff. This gallery contains general purpose and District-specific maps. VIEW MAP GALLERY »
Aerial Photography
The District provides an extensive collection of digital aerial photos (DOQQ: Digital Orthophoto Quarter Quadrangle) … Read more
Your Questions AnsweredMarch 2019Q: What are stormwater ponds and why do we need them?A: A stormwater pond is designed to collect and manage runoff from rainwater. When rainwater lands on rooftops, parking lots, streets, driveways and other hard surfaces, the rainfall that doesn’t soak into the ground (stormwater runoff) flows into your neighborhood stormwater pond through grates, pipes, shallow swales or ditches.… Read more
Your Questions AnsweredOctober 2021Record amounts of rainfall in some areas over the summer has highlighted the importance of stormwater ponds to help prevent flooding and improve water quality throughout the region. You may have seen stormwater ponds throughout neighborhoods and commercial developments in Florida but might not know about their purpose as many people often mistake stormwater ponds for natural water bodies. Southwest Florida Water Management… Read more
August 2024Q: What are stormwater ponds and why do we need them?A: A stormwater pond is designed to collect and manage runoff from rainwater. When rainwater lands on rooftops, parking lots, streets, driveways and other hard surfaces, the rainfall that doesn’t soak into the ground (stormwater runoff) flows into your neighborhood stormwater pond through grates, pipes, shallow swales or ditches. Stormwater ponds are required for… Read more
Highlights
- The lower half of the river is part of the more than 31,000-acre Chassahowitzka National Wildlife Refuge
- Designated an Outstanding Florida Water
- Located in Citrus County
- 190-square-mile springshed
- Ecological shifts in the river caused by sea level rise, coupled with the decline of spring discharge primarily due to a long-term decrease in…
Lake Tarpon SWIM Plan Update The Surface Water Improvement and Management, or SWIM, program evaluates priority water bodies, identifies challenges and implements projects to improve water quality and natural systems. The District is currently updating the SWIM plan for Lake Tarpon and the draft plan is below: Approval ProcessThe draft Lake Tarpon SWIM plan will be presented… Read more
Wetlands »
Your Questions Answered
November 2019
We often receive questions from the public about wetlands and why they are important. Tasha Dailey is certified as a Professional Wetland Scientist by the Society of Wetland Scientists and explains why wetlands are a critical part of our natural environment.
Q: What is a wetland?
A: A wetland is a distinct ecosystem that is flooded by water, either permanently or seasonally, where… Read more
Highlights
- Homosassa Springs is the headwaters of the Homosassa River and is known as the Homosassa Springs State Wildlife Park
- The park serves as a rehabilitation center and refuge for orphaned or injured manatees.
- Located in Citrus County
- 270-square-mile springshed
Highlights
- Designated an “Estuary of National Significance” in 1987
- Surface area of approximately 52 square miles
- Includes Manatee and Sarasota counties
- 150-square-mile watershed
- Alteration and loss of coastal uplands and wetlands due to development
- Spread of non-native animal and plant species
- Degraded water quality from non-point source…
White Papers
White papers are authoritative reports or guides that help identify or solve a problem. White papers educate readers and help people make decisions. The District uses white paper research to synthesize research regarding barriers and benefits associated with target behaviors that influence water conservation and water quality. These white papers include programs that have been implemented promoting these behaviors along with strategy suggestions.… Read more
Your Questions Answered
July 2020
Every year, millions of people visit public conservation lands purchased by the Southwest Florida Water Management District (District) and its partners to protect Florida’s water resources. Ellen Morgan Morrison, the District’s Operations and Land Management Assistant Bureau Chief explains more about District owned and managed lands and how the public can enjoy these properties.
Q: Why does… Read more
Highlights
- Charlotte Harbor is Florida's second largest open water estuary at 270 square miles
- Generally considered one of the most productive estuarine ecosystems in southwest Florida
- Designated an "Estuary of National Significance" in 1995
- Includes Charlotte, Lee, and a portion of Sarasota County
- 4,400-square-mile watershed
- Alteration and…
Rainfall summaries are available as spreadsheets for downloading to your computer. Summaries are tabulated by specific geographic areas, such as county or drainage basin boundaries, for that portion of the geographic area within SWFWMD boundaries. Each page within a spreadsheet shows period-of-record rainfall totals in inches (based on area-weighted average values) for 1915 through the previous calendar year by month, wet season, dry season, calendar year, or water year.… Read more
Project OverviewIt removed accumulated sediments from targeted areas of the river to re-establish historic river depths where these sediments had covered natural habitats. Sedimentation alters the river channel structure, reducing passage for manatees and other animals. It can also smother beneficial submerged aquatic vegetation and other important habitats. Accumulated sediments were removed using hand-dredging, which includes divers vacuuming sediments… Read more