Scientists find underground river beneath Amazon

[donharter]

Here is one link about this:
http://www.physorg.com/news/2011-08-...th-amazon.html

Could it be longer than Mammoth Cave? Is it even an underwater cave?

[sskasser]

Nice find! I was just about to post it and you beat me to it!

http://news.yahoo.com/scientists-und...172323813.html

Now, I wonder, what's the deco schedule for 4000 meters?

Scientists find underground river beneath Amazon

Brazilian scientists have discovered an underground river some 4,000 meters (13,000) feet deep, which flows from west to east like the country's famous waterway.

A statement this week from Brazil's National Observatory named the underground river Hamza and said it represents one of two different draining systems for the large rainforest region.

A team of scientists led by Elizabeth Pimentel came to the conclusion from studying 241 wells drilled by the state oil giant Petrobras in the Amazon region.

Even though the two rivers cover a similar path they have differences. The underground river flows at a far slower pace and empties into the ocean deep underground.

"It is likely that this river is responsible for the low level of salinity in the waters around the mouth of the Amazon," the statement said.

[Squirrel Girl]

I googled around this article, and there's nothing to suggest that the water flowing underground is flowing through conduits. It's probably diffuse aquifer flow.

[Benderr]

Now, I wonder, what's the deco schedule for 4000 meters?

Probably the same schedule as the one for 1000 meters

[donharter]

Here is a little more information.
http://latino.foxnews.com/latino/new...eneath-amazon/

Here is the article that it refers to. It is not in English though.
http://www.estadao.com.br/noticias/g...s,763540,0.htm

Here is the source article.
http://www.on.br/conteudo/noticias/2..._SBGF_2011.pdf
Again not in English.

Here it is in English:
http://www.on.br/conteudo/noticias/2...Hamza_2011.pdf

[donharter]

I googled around this article, and there's nothing to suggest that the water flowing underground is flowing through conduits. It's probably diffuse aquifer flow.

Per the paper the flow velocity of the Amazon is .05-5 m/s. That of the underground "river" is 10-8 - 10-9 m/s
However the flow rates are 133m^3/second for the Amazon and 3900 m^3/second for the underground "river"
So it seems that there is no underwater cave. The flow velocity is too slow.

[gsk3]

http://img.ibtimes.com/www/articles/...national-o.htm

Whoa.

[icestac]

Is that the same as this one?
http://www.cavediver.net/forum/showt...ghlight=amazon

[Squirrel Girl]

Is that the same as this one?
http://www.cavediver.net/forum/showt...ghlight=amazon

Good catch. I merged the threads.

[Kelly Jessop]

I was counting on seeing troglobitic piranahs