Lake O levels threaten ecological health, SCCF reports
The Sanibel-Captiva Conservation Foundation reported that as of July 12, Lake Okeechobee was about 2 feet higher than the level that supports a healthy ecosystem for the lake and its marshes and prairies, which provide habitat to wading bird and fish communities. Measuring 14.88 feet at the time, the lake was 1.9 feet higher than the top of the ecological envelope, which defines the optimal range.
“The further away lake levels get from the healthy stage, the worse the ecological effects could get,” Research and Policy Associate Leah Reidenbach said. “Right now, we are seeing an example of how high lake levels are associated with algal blooms that have been plaguing the lake for most of the summer.”
The SCCF reported that high lake levels early in the summer lead to the potential for damaging releases later in the wet season, particularly as tropical storm activity increases. When the lake stage is too high for too long, the ecological effects ripple into the following seasons by causing permanent damage to the lake’s marsh and prairie habitats, as well as wading bird and fish communities.
Over the prior week, no water had been released to the Caloosahatchee from Lake Okeechobee, with a 14-day average of 3,371 cubic feet per second (cfs) at the W.P. Franklin Lock and Dam (S-79). The flows were coming mostly from runoff within the watershed.
“Flows greater than 2,600 cfs are considered damaging to the Caloosahatchee Estuary and we have seen increasing signs of blue-green algae along the canal and around communities along the Caloosahatchee as a result,” she said. “This is why storage projects in the works are so important.”
The SCCF reported that projects such as the C-43 West Basin Storage Reservoir (WBSR) — a 55.4-billion-gallon water storage area in Hendry County — are essential for mitigating excess flows from the watershed and lake during the wet season. It is expected to be fully operational by 2026.
“In the meantime, we will have to continue bracing for a summer of high flows from the watershed, and potentially from Lake Okeechobee by the end of the wet season,” Reidenbach said.