Tag Archives: eutrophic

Studies Based on 1953 Revealed Lake Okeechobee was becoming Dangerously Hyper-Eutrophic

Today I share an excerpt form “Conclusions of the Special Project to Prevent the Eutrophication of Lake Okeechobee Relevant to the Management Determination for the Everglades Agricultural Area,”  Draft Report, State of Florida 1975. It is important that historical information like this is available to the public. It is mind-boggling that in 2023, seventy years since 1953, the issue of eutrophication of Lake Okeechobee has only worsened. Every year the estuaries are plagued by the threat of discharged toxic algae.  Reports like this one lie buried in Florida’s state archives in Tallahassee. Most legislators have probably never read it. What has been done to improve water quality is not enough.

Finding I.

Lake Okeechobee is presently enriched and moderately eutrophic. If the present trend of increasing nutrient loads from the drainage basins is not reversed, the lake could become hyper-eutrophic within the foreseeable future.

The following research evidence is proffered in support of Finding I.

  1. In 1953, Dr. H. T. Odum sampled the phosphorus content of  Lake Okeechobee and tributaries to the lake. Although not  enough samples were taken to have statistical significance, the values of the samples were well below levels consider to be eutrophic. 

In 1953, the lake’s watershed  was essentially undeveloped. The fact that the lake had low phosphate values in the water column indicates that the lake was not eutrophic in 1953. Water quality samples taken since 1953 have all shown phosphorus values higher than those taken by Odum. This indicates that present levels of phosphorus in the lake result from man’s drainage and land-use practices in the drainage basins.

Finding II. to follow….

Algae Overview North, South, East, West LakeO

Because the Baron needs hours on the engine, my husband Ed and I have been up in the sky a lot lately. Sometimes I am with him and sometimes I am not, but through technology we are always connected. 

Today I am sharing all aerials Ed took yesterday, 6-17-20, that continue to document a very expansive algae bloom in Lake Okeechobee. 

So where exactly is the algae? I can tell you, from the sky, flying over the central and southern part of the lake -at two, to five thousand feet -going two-hundred miles per hours -it sometimes becomes one giant blur of green. Right now, the bloom is visible mostly in the south central (east, west and central) areas of the lake, not in the north.

Seeing the algae depends on lighting and some areas are brighter than others, but when the sun hits the water just right, a sheen is everywhere.

About a mile and a half off Port Mayaca’s S-308 on the east side is the brightest and weirdest of all often displaying geometric formations due to boat traffic through the channel.

The ACOE has been flowing C-44 into the lake at S-308 but this certainly is not the cause of all the algae. Ed and I have years of documentation. The lake is eutrophic. Winds also affect the collection and formation of the algae. For a deeper dive into this you can visit my brother Todd Thurlow’s website EyeOnLakeO.

Here are all photos 6-17-20 with some comment clues and GPS. I have made one comment and then all photos that follow are the same location just a different angle. Use the GPS too. Question? Just ask! 

~Eye in the Sky 

MOVIE SOUTHEASTERN LAKEO, 6-17-20