Weekly Estuarine
Conditions Update - As of April 13, 2009
St. Lucie
Estuary
Current
Conditions:
Over the past
week, no flow was discharged at S-80. Discharge from the
|
Weekly Average Salinity (ppt) |
|
|
Sampling Site |
Surface |
Bottom |
Envelope |
|
20.7 (20.3) |
21.1 (21.3) |
|
HR1 (N. Fork) |
23.8 (23.2) |
24.6 (23.9) |
|
|
26.2
(25.8) |
26.5
(26.1) |
8.0 – 25.0 |
A1A Bridge |
30.4 (30.3) |
32.1 (31.7) |
20.0 – 31.0 |
Salinity
throughout the estuary remained about the same with last week. 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,
discharge averaged 578 cfs
at S-79, 493 cfs at S-78, and 903 cfs
at S-77. The concentration of chlorides at the Olga Plant was 120 ppm yesterday. 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 |
|
5.5 (5.5)
|
6.4 (6.2) |
Rt. 31 Bridge |
7.6 (7.5)
|
9.0 (9.0) |
I-75 Bridge |
9.7
(9.4) |
11.4 (13.0) |
|
17.8 (18.6) |
18.6 (19.0) |
|
25.9 (26.3) |
26.9 (27.0) |
Shell Point |
34.2 (34.3) |
35.2 (35.2) |
A 7-day pulse
release at S-79 began on Saturday, 4/11/09. Average salinity remained
about the same for most part of the estuary except for a slight decrease
between
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 chlorophyll at Ft. Myers and Shell Point ranged from 1
to 7 mg/L (dissolved oxygen was unavailable) (www.recon.sccf.org).
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