Alien Invasion - I want my pond back !

the old grind · May 29, 2015

SPYDERLK said:
The added flow situation is that in low flow siphons, air sucked out of the water slowly collects at the hi point and will finally stop the siphon.

Oh yes, BTDT on some long runs. (~75', high point 3' or so above source, net fall <3', 1 1/2" corrugated hose.) :mur:.

How many times I wish I'd had a bucket/barrel like the OP's at the outlet when slow flow wouldn't flush out the bubbles. Pretty sure OP drew down a lot more water in a lot less time than the last swimming pool we drained.

Eric, looking good there! Didn't fuss last summer, but this year the muskrats (native Ondatra zibethicus) have found me again. Lord help you if non-native nutria/coypu (Myocaster coypus) have invaded your pond as they have done to so many here in the states. (Even in the cool Northwest

) I've got three hides for shooting swimmers (20 Ga, 5-15 M opportunities), and am going out now to set traps (again ..), will do my best to "git 'er done" before the denouement of your tasty tale. tog

clemsonfor · May 29, 2015

maybe some sort of rat or mammel that digs your dam out and makes it leak i am kind of with Old grind on that thought.

Luke'sScreenName · May 29, 2015

Hippies! Naked, harry hippies! Am I right?

MossRoad · May 29, 2015

Contrary to popular misconception, siphons don't work because of atmospheric pressure. They work by gravity. Want proof? Siphons work in a vacuum where there is no atmospheric pressure. The chain over a pipe example is the best example so far.

I encourage folks to do some experiments of your own. Get some clear tubing, a couple buckets, some colored water and see if you can make a siphon work where the downhill side is shorter than the uphill side. Good luck!

Some fine reading....
Dictionary definition of 'siphon' has been wrong for nearly a century | Science | The Guardian

Even better....
A practical example of a siphon at work | QUT ePrints

Wagtail · May 29, 2015

lukestafford said:
Hippies! Naked, harry hippies! Am I right?

Seriously, although an infestation of hippies is a concern for anyone, I believe that Eric has given the game away by mentioning the influx of critters to the newly uncovered environment.

Eventually the rare & endangered "Flame Spotted Newt" or "Purple Ringed Coot" will take up residence... the bloody environmentalists and busybody 'Greens' will declare that area (+ a surrounding 40 metres) a No-Go-Zone.

dave1949 · May 29, 2015

I think the foot prints are clearly those of a Satyr, not nekkid hippies, Spotted Newts or Ringed Coots.

Luke'sScreenName · May 29, 2015

dave1949 said:
I think the foot prints are clearly those of a Satyr, not nekkid hippies, Spotted Newts or Ringed Coots.

A syphon satyr?! Oh crap! With syphon chains? Not sure if one end of chain has to be longer though.

SPYDERLK · May 29, 2015

MossRoad said:
Contrary to popular misconception, siphons don't work because of atmospheric pressure. They work by gravity. Want proof? Siphons work in a vacuum where there is no atmospheric pressure. The chain over a pipe example is the best example so far.

I encourage folks to do some experiments of your own. Get some clear tubing, a couple buckets, some colored water and see if you can make a siphon work where the downhill side is shorter than the uphill side. Good luck!

Some fine reading....
Dictionary definition of 'siphon' has been wrong for nearly a century | Science | The Guardian

Even better....
A practical example of a siphon at work | QUT ePrints

A siphon will work in a vacuum? ... Now youve done it.