Showing posts with label advance stormwater harvesting and recycling. Show all posts
Showing posts with label advance stormwater harvesting and recycling. Show all posts

Sunday, November 12, 2023

FEMA The huge public investment in the Celery Fields has paid off

 FEMA's statement on the success of the Celery Fields:

Sarasota County Drainage Project Protects Celery Fields



SARASOTA, FL – Sightseers in northeastern Sarasota County enjoy a natural bird habitat, walking trails, and scenic overviews in an area once flourishing with stalks of celery. An old machine that used to harvest celery and a series of canals remain as reminders of what local residents still call the celery fields. Even evidence of the annual flooding is gone.

Farmers designed the fields to retain water and nourish the celery crops, but development to the south continually flooded as new building subdivisions increased runoff and decreased the ability of the ground to absorb water. The slight southern slope of the land and the loss of natural turf, due to development, caused flooding when heavy rains fell.

The situation became critical in 1992 when 22 inches of rain fell over three days, and the resulting runoff inundated more than 200 homes in the former celery fields.

According to Kirk Bagley, Sarasota County drainage operations manager, the county not only wanted to find a way to safely reroute the water from the inhabited areas, but also ensuring that when flood waters were moved, they did not flood other homes.

Engineers analyzed the area’s flooding patterns and north-south water flows, and then developed a plan to control the water through a series of canals, ponds and mechanical flow devices. They created computer simulations with various flooding conditions and, upon review of the data, the design appeared to stop the damage without flooding other areas.




The county purchased the remaining former celery fields – more than 300 acres of property cut with ditches and framed by a series of canals. The design incorporated the canal infrastructure and added diversion gates, outflow pipes and controls.

After three years of construction on the first two phases of the project, the test came in November and December 1997 when two 100-year events (a level of flooding that has a 1% chance of occurring in any given year) deluged the flood-prone area. The design worked. Nearby homes were spared from flooding.

The county installed automated monitoring stations that allowed staff to watch the water levels remotely. Because of this remote operation, Bagley and his staff can track the amount of water in the canals, measure accrued rainfall, graph results and make appropriate decisions about holding and releasing runoff from the facility and control flow into the system.

To pay for the project, Sarasota County put into place a funding plan often used by cities: the county’s water division localized assessments. This way only those residents who benefited from the project paid for it, instead of taxing all county residents.

“We couldn’t do what we’ve done without the basin assessments,” Bagley said. “With them we don’t have to compete for the county’s general fund dollars.”

The county supplemented assessments for the $27 million project with a grant from the Southwest Florida Water Management District and funds from the state of Florida.

The celery fields project contained a hidden bonus for the county. The grass marsh created on the site lured many birds to nest in its high grasses and weeds. People drove for miles to watch the migrations.

A partnership between the county and the Audubon Society developed to enhance the natural bird habitat. Plans for a third phase will increase walking trails, picnic areas, park amenities and natural landscaping. Visitors will find signs that identify birds and plantings amid the pines, salt myrtles, and wax myrtles.

Water brought new life to the celery fields. What started as nourishment for agricultural land became aggravation for flooded homesteads, returned as a natural habitat for birds and became a great place for people to visit and enjoy the view.

Tuesday, November 27, 2018

Hands Along the Water to North Port: We can combat Red Tide

On Nov 27, 2018 at the North Port City Commission, members of Hands Along the Water, an environmental advocacy group, urged the Board to take a look at existing state research on the impact of nitrogen nutrients on Red Tide.

Despite many measures undertaken by local communities (e.g. closing septic tanks), nitrogen levels in coastal waters such as Sarasota and Lemon Bays have steadily been increasing:



What's more, clear evidence shows that stormwater ponds as currently managed do not achieve the 80% rate of nutrient reduction presumed by state regulations. The actual performance is closer to 40%-45%.

Beginning in 2000, the Dept. of Environmental Protection spent 10 years researching the issue and, after consulting experts statewide, had prepared in 2010 to put in place an Advanced Stormwater Harvesting and Recyling Plan. Then the new Rick Scott administration came into office, and swept all these plans aside.

With Hands Along the Water was Steve Suau, a stormwater engineer who has been working on the problem and how to best address it. Suau presented the facts and potential benefits of reviving the Advanced Stormwater Treatment option.

The group asked North Port Commissioners to consider adopting a Resolution that would ask Governor Elect Ron DeSantis to restart this effort to reduce nitrogen runoff. The effort would be neither costly nor difficult - in fact it could produce revenue, the group said. Here is a summary timeline:

RED TIDE TIMELINE
1977 to present: (past 50 years): Red tide abundance and duration increases
1997 to present: Nitrogen concentrations in Sarasota and Lemon Bays increase
1995 to 2010: Current regulations presume 80% effectiveness of pond reduction, but
studies revealed that stormwater ponds reduce nitrogen runoff by only 40-45% effective
2000 to 2010: Florida conducts 10-year research and monitoring,
drafts Stormwater Rule and Advanced Stormwater Treatment Design Manual.  
2011: Incoming administration cancels Stormwater Rule and Manual
2018: Proven Stormwater Harvesting and Recycling Technology exists now
  • Quantifiable
  • Can be used within existing pond footprint
  • Can produce revenue 

2019 and Beyond: Hit the Restart Button: Resolve to ask the new DeSantis administration to reinitiate the Advanced Stormwater Treatment Rule public hearing and adoption process.

See Steve Suau's full presentation here.

Letter to Governor Elect Ron DeSantis.

Hands Along the Water speakers:

Samantha Gentrup


Nadine Baker


Brian Kelly


Joan San Lwin


Tim Ritchie


Edie Driest



More on this significant opportunity for to do someting about Red Tide here.

More about Red Tide


Members of Hands Along the Water at North Port City Hall Nov. 27, 2018