Tag Archives: data

A Ten Year Calendar View, Discharges to the St Lucie Estuary

A Ten Year View, Discharges to the St Lucie Estuary

Today I share images that help tell the story of the St Lucie Estuary over the past ten years. The first image is from the website eyeonlakeo. My brother, Todd Thurlow, takes data from D-Hydro of the SFWMD and puts it into a format that the average person can understand. 

The chart above shows the “S-80 spillway at St Lucie Locks’ cumulative discharges by CALENDAR YEAR, 2011-2020.”

Scientists use Water Years, May 1 of one year, through April 30 of the next year. This splits up the years making it more confusing to remember or understand. We, as people, live our lives in calendar years. 

We can see by looking at Todd’s chart that 2016’s calendar year is highest overall discharge year with 842,775 acre feet (one foot of water covering one acre) of water going to the St Lucie from what is called “local runoff” (all canals and surrounding areas) as well as discharges from Lake Okeechobee.

How large is 842,775 acres? Comparatively, Martin County is 347, 520 acres. 2020 is 188,723 acre feet and climbing. We are talking tremendous amounts of water! 

In descending order, we see 2016; 2013; 2017; 2018; 2015; 2020; 2012; 2014; 2019; and 2011.  The brown of line of 2020 crests 2015 as when the year is completed, 2020 will more than likely be higher than 2015.

I also wanted to share some very helpful charts I recently requested -in my research- from the South Florida Water Management District.  

This was my request:

“Could you please get me a chart or graph showing discharges to the St Lucie River for 2012-2020 by month. Please present this information from January through December of each calendar year and break it out from S-80 and S-308 and also give a total combined number. Please also note for each of those calendar years, the highest level Lake Okeechobee got that year.” 

To view this information, click on Charts in red below for visuals, and data in red below for numerical charts. As mentioned this information below is from the SFWMD. This compiled information provides great perspective. 

Charts

data

I, as many, participated in yesterday’s Army Corp of Engineers‘ Periodic Scientist Call. During the course of the call, it was alluded that the ACOE may be letting up or halting Lake Okeechobee discharges to the St Lucie Estuary soon. As soon as they do, we will begin to chart calendar year 2021. All things considered, everything in me believes it will be better than 2020! 

 

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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….Slide 1

 

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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