Tag Archives: discharge data

Summary of Lake releases for 2016 compared to 2013 and the last big El Nino event (1997-1998), SLR/IRL

Today I am sharing in full Dr Gary Goforth’s ( http://garygoforth.net/resume.htm) note and summary of Lake Okeechobee releases for 2016 compared to 2013 and the last big El Nino event (1997-1998) as presented to Martin County.  Please click on slides for larger view and thank you Dr Goforth for helping us with the numbers.

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From the desk of Dr Gary Goforth regarding slide presentation:

1. More than 113,000 acre feet (36.9 billion gallons) of Lake water (“blackwater”) has been dumped to the River/Estuary during the first 20 days of the 2016 Lake releases; this is equal to 27% of the entire 147-day 2013 event, and 11% of the 1998 event.

2. The 2016 average daily rate of Lake releases is slightly less than the average 1998 rate, and more than twice the 2013 rate.

3. A distinguishing feature of the 2016 event is exceptionally high rates of C-44 Basin runoff in combination with the high Lake releases.

4. The 2016 average daily C-44 Basin runoff rate is 4 times the runoff rate of 1998, and more than twice the 2013 rate.

5. The 2016 average daily rate of combined flows through S-80 is more than the 1998 rate, and more than twice the 2013 rate.

6. The 2016 maximum daily rate of combined flows through S-80 is less than the 1998 maximum flow, but more than the 2013 maximum flow.

7. The 2016 Lake releases have already contributed more than twice the annual TMDL for phosphorus and nitrogen.

2016 data are preliminary and subject to revision.

I was on the IRL yesterday and travelled from the St. Lucie Inlet to the Ft. Pierce inlet – I saw no pockets of clear water and visibility was only 6 inches – 18 inches. I can’t imagine the sea grasses are getting any sunlight; I certainly didn’t see any sea grasses from the surface.

Gary

 

SLIDE PRESENTATION:

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….Slide 1

Notes: 1. More than 113,000 acre feet (36.9 billion gallons) of Lake water (“blackwater”) has been dumped to the River/Estuary during the first 20 days of the 2016 Lake releases; this is equal to 27% of the entire 2013 releases, and 11% of the 1997-1998 event. 2. The 2016 average daily rate of Lake releases is slightly less than the average 1998 rate, and more than twice the 2013 rate. 3. The 2016 average daily C-44 Basin runoff rate is 4 times the runoff rate of 1998, and more than twice the 2013 rate. 4. The 2016 average daily rate of combined flows through S-80 is more than the 1998 rate, and more than twice the 2013 rate. 5. The 2016 maximum daily rate of combined flows through S-80 is less than the 1998 maximum flow, but more than the 2013 maximum flow. 6. The 2016 Lake releases have contributed more than twice the annual TMDL for phosphorus and nitrogen. 7. 2016 data are preliminary and subject to revision.

 

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