Estuarine Conditions as of April 29, 2008

 

St. Lucie Estuary

 

Current Conditions:

There were no releases through S-80 from C-44,  S-49 from C-24, and S-48 from C-23 over the past week.  The current weekly average salinities (in bold) at the four monitoring sites in the St. Lucie are given below in parts per thousand (ppt), along with the previous week’s (in parenthesis).

 

 

Weekly Average Salinity (ppt)

 

Sampling Site

Surface

Bottom

Envelope

Palm City Bridge (S. Fork)

 13.98 (11.09)

15.26 (12.44)

 

HR1 (N. Fork)

  17.57 ( 14.04)

 18.77 (16.87)

 

Roosevelt Bridge

 16.76 (15.93)

18.95 (18.02)

8.0 – 25.0

A1A Bridge

 27.28 (24.66)

29.16 (27.79)

20.0 – 31.0

 

Average salinity increased about 3 ppt in the South Fork and North Fork, and about 1-2 ppt at Roosevelt Bridge and A1A Bridge during the past week. Both the surface and bottom salinity are in the preferred range at the Roosevelt Bridge, and at the A1A Bridge.  Salinity conditions in the estuary are considered good, based on the salinity preference of the oyster, Crassostrea virginica, at Roosevelt Bridge.  The current surface salinity of 16.8 ppt at the Roosevelt Bridge is 11.2 ppt below the maximum weekly average of 28.0 ppt achieved in May 2001 during the 2000 – 2001 drought.

  

Caloosahatchee Estuary

                                                         

Current Conditions:

No discharge occurred through S-79 during the past week.  An average weekly discharge of 302 cfs occurred at S-77. The concentration of chlorides at the Olga Plant yesterday was 189 mg/l, slightly up from 186 mg/l of last week.  Weekly average salinities for specific sites are given below in parts per thousand (ppt).  Current weekly averages (in bold) may be compared to last week’s data (in parenthesis). 

 

 

Weekly Average Salinity (ppt)

Sampling Site

Surface

Bottom

Franklin Locks (S-79)

 13.77 ( 11.06)

14.64 (11.73)

Rt. 31 Bridge

13.33 ( 10.89)

NA (NA)

I-75 Bridge

   NA ( NA )

 17.41 (15.01)

Ft. Myers Yacht Basin

 21.36 (19.40)

 22.23 (20.41)

Cape Coral Bridge

 28.35 (26.95)

28.98 (27.71)

Shell Point

 34.50 (33.40)

 35.22 (34.15)

 

Average salinities increased about 3 ppt in the upper estuary, and 1-2 ppt in the lower estuary.  Salinity at the Ft. Myers surface sensor was above the 1-day MFL criterion of 20 ppt.  The current surface salinity of 13.8 ppt at S-79 is 6.2 ppt below the maximum weekly average of 20.0 ppt achieved in May 2001 during the 2000 – 2001 drought.  Salinity at Shell Point and the Cape Coral Bridge is above the optimal range for the oyster, Crassostrea virginica.  Conditions in the upper estuary east of Ft. Myers are poor due to high salinity.  Conditions in the lower estuary downstream of Cape Coral are fair considering the combine salinity preference of oysters and seagrasses.  

 

FWRI reports that no Karenia brevis, the Florida red tide organism, was detected this week in water samples collected alongshore between Pinellas and Collier counties. 

 

https://my.sfwmd.gov/portal/page?_pageid=1314,2554645,1314_19738269:1314_19738234&_dad=portal&_schema=PORTAL

  

click on “Current Week”

click on “Technical Summary”

scroll to the bottom and click on “Coastal Ecosystems”

 

 


 

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