Weekly Estuarine
Conditions Update - As of April 27, 2009
St. Lucie
Estuary
Current
Conditions:
Over the past
week, no discharge occurred at S-80. Discharge from the
|
Weekly Average Salinity (ppt) |
|
|
Sampling Site |
Surface |
Bottom |
Envelope |
|
20.7 (20.5) |
21.9 (21.5) |
|
HR1 (N. Fork) |
25.3 (24.8) |
26.3 (25.7) |
|
|
27.6
(27.3) |
27.6
(27.5) |
8.0 – 25.0 |
A1A Bridge |
31.3 (31.6) |
33.2 (33.4) |
20.0 – 31.0 |
Salinity
throughout the estuary increased slightly last week, except at A1A Bridge which
had a slight decrease. At both the Roosevelt and A1A Bridges, weekly
average salinity is slightly above the upper bound of the preferred
range. Salinity conditions in the estuary are considered to be fair
considering the time of year, the location in the estuary, and salinity
preference of the oyster, Crassostrea virginica.
Caloosahatchee
Estuary
Current
Conditions:
During the past
week, no discharge occurred at S-79. Discharge averaged 128 cfs
at S-78, while discharge at S-77 was unavailable. The concentration of
chlorides at the Olga Plant was 157 ppm on
Sunday. The current weekly average salinities (in bold) at the six
monitoring sites in the Caloosahatchee Estuary are given below in parts per
thousand (ppt), along with the previous week’s (in
parenthesis).
Weekly
Average Salinity (ppt) |
||
Sampling Site |
Surface |
Bottom |
|
NR (5.3)
|
9.1 (6.4) |
Rt. 31 Bridge |
8.5 (5.3)
|
9.1 (7.0) |
I-75 Bridge |
9.6
(6.0) |
11.4 (9.6) |
|
17.1 (14.8) |
17.9 (18.5) |
|
24.7 (24.7) |
25.6 (25.2) |
Shell Point |
34.7 (34.1) |
34.8 (34.5) |
Average salinity
increased throughout the estuary. Conditions in the upper estuary east of
FWRI (Fish and Wildlife Research Institute) reports that
water samples collected alongshore between Pinellas and Monroe counties
contained no K. brevis (www.floridamarine.org).
Monitoring data collected by the River, Estuary and Coastal Observing Network
(RECON) of Sanibel-Captiva Conservation Foundation
(SCCF) indicated DO concentration at
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