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-   -   Cameron Prairie Refuge/Weirs salinity targets? (http://www.saltycajun.com/forum/showthread.php?t=68497)

redchaserron 05-24-2018 04:11 PM

Cameron Prairie Refuge/Weirs salinity targets?
 
Anybody know what salinity level they generally close the boat bay in the grand bayou weirs at? Right now the salinity level in the guage back toward Broussard lake is 6.6 ppt.

J Berg 05-25-2018 10:24 PM

The boat bay is closed now

redchaserron 05-26-2018 09:11 AM

Quote:

Originally Posted by J Berg (Post 835828)
The boat bay is closed now

So I guess the answer is around 6.6 ppt

Third Coast 05-27-2018 09:10 AM

Generally, how long will it stay closed and where do you find the salinity on the refuge side

Feesherman 05-27-2018 10:47 AM

Quote:

Originally Posted by Third Coast (Post 835854)
Generally, how long will it stay closed and where do you find the salinity on the refuge side

That depends on rainfall

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redchaserron 05-28-2018 07:51 AM

Quote:

Originally Posted by Third Coast (Post 835854)
Generally, how long will it stay closed and where do you find the salinity on the refuge side

They will keep them closed until the area get enough rain to lower the salinty to target levels..or as has happened in rare instances it gets so bad that the salinity behind the weirs becomes higher than levels in the lake. You can get data on the salinity and also marsh water levels at www.waterdata.usgs.com on the front page you'll see a little icon of a US map, click on it to open the map, then zoom into the area to the SE of Big Lake and you'll see a marker back toward Broussard Lake. Click on the marker icon then click "access data"

Third Coast 05-28-2018 12:57 PM

Thank you redchaseron, that?s the answer I was looking for

TidewateR 05-30-2018 06:58 PM

at this rate gates might be closed a while, as salinity is still climbing.

Interesting bc the last few springs / early summers, the water behind the weirs has been high / fresh..just when we thought we’d get a “normal” year in 2018...can’t win lol

Smalls 05-30-2018 07:11 PM

The USFWS operates based on what are called "isohaline lines". If the salinity exceeds the target level, the weirs are closed. I used to have a figure that showed those lines, but I would have to do some digging to find it. The main lines they go on are a 5 ppt line and a 12 ppt line.

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