UK Caving

WHERE THE CAVES ARE - The Caving Regions => Rest of The World => UK Lava Tube Group => Topic started by: Pegasus on May 10, 2015, 09:22:20 am

Title: Lost lake
Post by: Pegasus on May 10, 2015, 09:22:20 am
I'm sure this will have been posted before, however for those who've not seen it.... http://www.treehugger.com/natural-sciences/oregons-lost-lake-disappearing-through-mysterious-hole.html (http://www.treehugger.com/natural-sciences/oregons-lost-lake-disappearing-through-mysterious-hole.html)
Title: Re: Lost lake
Post by: Ed W on May 10, 2015, 12:10:43 pm
Pegasus,

It was posted yesterday under idle chat (http://ukcaving.com/board/index.php?topic=18332.0 (http://ukcaving.com/board/index.php?topic=18332.0), but probably better off here.

Cheers,

Ed
Title: Re: Lost lake
Post by: Pegasus on May 10, 2015, 12:22:24 pm
Thanks, Ed  ;D
Title: Re: Lost lake
Post by: Joe Duxbury on May 10, 2015, 03:48:38 pm
Ed,
Do you know if anyone has tried to divert the water (in the summer) and take a look at where the tube goes?
You've done it in the IĆ°rafossar cave in Iceland, but maybe this one is too small. Which would explain why it's capable of filling up in winter.
Title: Re: Lost lake
Post by: Ed W on May 10, 2015, 04:02:13 pm
Hi Joe,

Unfortunately I know as much as you about the tube in the article.  In the case in Iceland the tube is fed through fissures in the lake bed, though there are also sinks in the bed of the river that drains the lake.  In very wet conditions several of the caves around Laufbalavatn can become impassable.  The tube could be any size, and it could also become choked with debris and silt or it could just lead to a lava seal and back up from there.

As I said in the other thread, this is not that uncommon, lava tubes quite often capture surface flow.  The photo below shows a passage in Manjangul on Jeju Island (Republic of Korea), though the passage is dry in this shot, I am reliably informed that during Typhoons that the water level reaches the obvious line about 1m up the walls.  Apparently the water is also shifting a bit too, not static.  It would be quite a sight in those conditions.

(https://scontent-lhr.xx.fbcdn.net/hphotos-xpa1/v/t1.0-9/11229381_10152729656435974_772298988531787452_n.jpg?oh=5ac20bbc89757906ee8793b5b54846c5&oe=55DD3FF7)
Title: Re: Lost lake
Post by: Joe Duxbury on May 17, 2015, 08:27:45 pm
Here's a bit more:

https://www.facebook.com/permalink.php?story_fbid=10153274805128633&id=229362333632 (https://www.facebook.com/permalink.php?story_fbid=10153274805128633&id=229362333632)

I had hoped someone would take a look! Good for Brent!
Title: Re: Lost lake
Post by: Pegasus on May 18, 2015, 10:03:30 am
Some great photos too  :)