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Old 08-03-2010, 11:00   #16
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Close guys, check the charts. It's the sewage outfall.
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Old 08-03-2010, 11:10   #17
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no s**t
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Old 08-03-2010, 11:25   #18
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There are several charted sewer outfalls along the FL east coast about a mile off shore. One in the vicinity described. I went past one near Miami a few years ago and it looked just like this. The outflow is mostly fresh water which, being lighter than seawater, floats to the surface before disbursing.
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Old 08-03-2010, 11:41   #19
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Boaters are not allowed to discharge their sewage tanks that close to shore. In fact all the boaters in Florida do not discharge that much sewage in a year.
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Old 08-03-2010, 12:04   #20
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This is treated sewage and boaters are allowed to discharge Treated sewage this close to shore in this area. This is not in a no discharge zone. I would note however that the city of key west does in fact discharge its sewage into the no discharge zone in the keys. 24.5896N 81.7979W for those interested, shown on chart 11441.
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Old 08-03-2010, 12:18   #21
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King Neptune flushing his toilet???
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Old 08-03-2010, 12:28   #22
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Close guys, check the charts. It's the sewage outfall.
Sorry Bill, I have dove these sewage outlets and there pipes point straight East not up its definitely not that, its the current hitting a reef forcing the water up- fact is in the last year or two many of these outlets have been capped , Im not sure what theyre doing with the crap but I heard something like its being recycled into drinking water --
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Old 08-03-2010, 12:39   #23
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I was right over the charted end of the pipe off of Miami and it looked just like this. I attributed this to rising fresh water. I don't know if it matters which way the pipe points. I also one was over one of the fresh water spring off of Florida in the gulf of mexico. It made a similar surface disturbance. Underwater obstructions may in fact be responsible for this one. Too bad we don't have an exact position.
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Old 08-03-2010, 12:43   #24
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I think an UFO just ditched there, don't you see the shape matches?!

cheers,
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The waterborne equivalent of crop circles?
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Old 08-03-2010, 12:51   #25
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The waterborne equivalent of crop circles?
exactly! I even think I recognize the face of an alien in the water on the photo's! Yes, it's clear now that I look closer!

I think this thread turned crappy in a good way! ;-)

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Old 08-03-2010, 13:00   #26
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Charts list sewage lines and of course at the end, their outfall. I have sampled at these outfalls for different research projects. The difference in salinity (density of water) causes the water to rise. Some outfalls have diffusers which can run a few hundred meters in length, for those, its more difficult to spot a plume rising to the surface. The pictures look similar to sewage outfalls with short or no diffusers.

There are other reasons for places on the water where you see upwelling, which have already been mentioned. The most common occurrence is geography where you have currents and a rapid change in depth.

In the SF Bay there is a pinnacle near the GG Bridge and a ridge that extends from Angel Island in the Raccoon Strait...many others as well. Its fun to go right over them and watch the sounder and the hydraulics of the water surrounding them.
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Old 08-03-2010, 13:32   #27
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Methane????? Are you refering to whale farts??? could happen? Right?
We'll have to keep an eye on that. Global warming and all. Whales are a lot bigger than cows and could cause higher methane levels overall. (Tongue-in-cheek)
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Old 08-03-2010, 13:37   #28
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Ram hit it on the head.Have seen these a lot between Palm Beach {Lake Worth }inlet and Jupiter inlet.The reef edge turns almost east-west from north-south and the current boils up alot-very common to see when calm.Most outfalls are not that far out to sea.Hey Ram ever hear of the Cave-ballsy dive-right in the middle of those upwellings
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Old 08-03-2010, 13:39   #29
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The reason I suspected the outfall was this charted sewer line ending almost exactly 1 mile east of the inlet.
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