View Full Version : Why is the water ripply?

21st Jan 2009, 00:54
This is mid way between the 3 mile stretch of towpath Max and I walked today.


Now take it from an ex paraglider person, the wind was zero. There was only one boat movement on the canal, in both ways, and that was 30 minutes ago.

So why was the the water ripply?

And no jokes about pie eating!

21st Jan 2009, 01:07
Surely a flowing piece of water will show some movement on the surface?

Say again s l o w l y
21st Jan 2009, 01:08
Water does flow along canals a bit, so it isn't a completely still body of water. Therefore, ripply.

21st Jan 2009, 01:26
The water surface shows a 1-3 kt. wind.

Along the towpath, there's vegetation that will block the wind, but there's nothing to stop it on the water.

It's really quite common. Canoeists and kayakers learn that rivers funnel and direct the wind.

There's also a temperature difference between the banks and the water that will get convection going in very light wind conditions.

21st Jan 2009, 01:42
So when will it be still?

21st Jan 2009, 03:20
So when will it be still?

When there is no relative motion.

The movement of the water alone behaves hydraulicaly and as such some degree of resonance can be expected (rarifaction and condensation) otherwise known as ripples.

Then of course one should not ignore the live dog in the picture who could have just as well disturbed any tranquility by taking a whizz along the bank before the picture was taken.

In other words in our world there is constant motion and balances taking place all the time (pressures, thermals, etc.) just as there is always a wind somewhere to balance the air.

21st Jan 2009, 03:41
By absolute strict definition there is no place in the universe that is still.

21st Jan 2009, 04:39
'Tis created by the vibration through the earth's crust, caused by two million sets of feet marching to watch that Mr Obama's inauguration thingy.

Funny thing, resonance.


21st Jan 2009, 04:58
By absolute strict definition there is no place in the universe that is still.
Damn! And I was about to say something like:

Water + Canadian winters + Arctic = Still


21st Jan 2009, 05:11
Sorry, I shouldn't have had that bean yesterday.........:E

21st Jan 2009, 06:01
Fine droplets of water - otherwise called as Drizzle ??? :}

I am out of here ... :mad:

21st Jan 2009, 08:44
Not sure resonance is funny, but solitons are interesting; and now they know how they work they're using them in long distance fibre-optic cables, e.g. transatlantic, to eliminate the need for repeaters.

Ain't science wonderful...I mean interesting...

21st Jan 2009, 09:37
What did you fly then Ginge? A Bi-beta:p I'm sorry, that's cruel.:{

21st Jan 2009, 10:48
Fish Farts:)

21st Jan 2009, 12:31
It's caused by those 10 and a bit space invader video characters wobbling around.

Believe it or not!

tony draper
21st Jan 2009, 12:41
Arrr,it be a tad ripply round Cape Horn it be, arrrrr! :rolleyes:

21st Jan 2009, 14:02
Mmmm. Space Invader Wobbly things:uhoh: if you look very closely to the left of the picture you can just make out an Alien life form (blue face) hiding behind a tree. I reckon he's just pee'd in the Canal therefore causing the ripply effect..or.. maybe he's sneeking up on the Space Invader Wobbly things:eek:

21st Jan 2009, 14:13
There are nine places in England called Ripley.
And only one Gingernut with water that is ripply.
Not many people knew that.

21st Jan 2009, 14:34
Moving water but no wind, eh?
Bless my sole, this sounds very fishy.
Which plaice was this?
Perhaps it was a passing motor pike (and side carp).

21st Jan 2009, 14:36
Don't tell him your name Pike!

Beatriz Fontana
21st Jan 2009, 14:41
Fintastic! Normal service has been resumed :D

21st Jan 2009, 14:44
Why don't cod wear cod-pieces?

21st Jan 2009, 14:57
No it's do with the variable surface tenchun.............:ok:

21st Jan 2009, 15:01
It's ripply because you're about to find out in about 5 seconds, 617 Squadron just breached the dam about a mile upstream !!!

21st Jan 2009, 15:17
Did a Bullrush by?

Or someone fall off their perch?

21st Jan 2009, 15:26
Or a frog spawn perhaps?

21st Jan 2009, 16:23
thank you for appreciating the humor

21st Jan 2009, 17:28
What did you fly then Ginge? A Bi-betahttp://static.pprune.org/images/smilies/tongue.gif

'twas a Newave 280, then a Newave 315, then a Typhoon.

Second to last entry in log book (11/9/93) reads,

"Blown on to rocks at take-off site. ? Lack of concentration. #2nd finger left hand/injury to right knee. Landed in bottom landing field."

Realised then that fat bast*rds shouldn't really fly underneath bags of washing.

Got back on the horse once, and sold the blooming thing.

Was fun though.:)
I used to try and work out why the air was ripply, not canals.

21st Jan 2009, 17:32
It's all them birds flapping wot makes the air rippley!

Apart from seagulls, lovely smooth flyers those things!

21st Jan 2009, 17:37
Surfings alot more sedate, and it's nice to be able to see the currents and swirls.

Must admit, the flying used to terrify me, but sitting on the edge of a hill in the peak district with all ya'mates on a summers day- priceless.

21st Jan 2009, 17:47
Aye! Thet reet theer lad!

21st Jan 2009, 17:47
On the subject of water..

Why is it that the saucepan of water I've just heated on the gas ring gives off very little steam until I turn the gas off?

21st Jan 2009, 17:50
You aren't one of they silly sods who throws themselves of Mam Tor are you Ginge???

To mix threads - the water might be ripply because someone who ate all the pies was walking the towpath :ok: (They were Hollands weren't they?)

Loose rivets
21st Jan 2009, 18:00
Landed in bottom landing field."

You have special fields for landing on your bottom? Cool.

21st Jan 2009, 18:04
Funny you should mention Mam Tor, may be there tommorrow. If you see me & max, say hello.

Here's one I took earlier... YouTube - Paragliders on Mam Tor (http://uk.youtube.com/watch?v=JvKAPdcEVL4)

Mam Tor, splendid place, still amazes me that 100's of thousands, probably millions of people have it on their doorstep, and never visit it.

And for the record T-Bird, the Hollands are off. Mrs G's got me on some stupid diet that zaps y'a enrgy and makes you hungry all the time.

(Might sneak a bag of chips in tommorrow if I make it round the walk.:ok:)

tony draper
21st Jan 2009, 18:08
Buggah!! the bloke who took that clip is puffing and panting like a old Grampus.

21st Jan 2009, 18:19
It's gotta make ya hot and sweaty to do any good, so I'm told:p

Gotta be better than poncin' around in some Gym though:confused:

21st Jan 2009, 18:24
Always preferred Blue John Mine to Mam Tor.
Warmer and generally drier!

22nd Jan 2009, 09:12
Mam's a bugger to walk up. I did it once. Then I spent the rest of the trip boozing in Hope.

Ginge, Typhoon's are ancient, you would I think be pleasantly surprised how much they've come on in recent years. Having said that, I sold up last year in favour of playing squash for which I am rewarded with constant injuries.:uhoh:

Windy Militant
22nd Jan 2009, 10:57
Funny you should mention Typhoons!
We used to get them sneaking up the river Teifi in the 80's, at least I think that's what the Nimrods were chasing when they flew up the valley following the river!
You've probably just missed the periscope going down! :} ;)

22nd Jan 2009, 14:09
You have special fields for landing on your bottom? Cool.

I think they are the muddy ones sot that you can have soft landing. Being muddy they also disguise what you did in your trousers when you actually jumped of Mam Tor.

I used to go up Mam Tor a lot when I was a nipper. There were no paragliders there then though.

22nd Jan 2009, 14:35
Playing squash? Constant injuries?
Get a new steamroller driver Para!
Shouldn't happen!

22nd Jan 2009, 19:05
Mam's a bugger to walk up. I did it once.

Nahhh, tat's the best bit. And don't give me any of this, "paragliding's moved on" malarky.

The airs still ripply, and they still look like a bag of washing when they go wrong:) Ask Hugh, the Brittania Captain (Circa 1992)

Anyway, hope you don't mind me indulging myself, here's what it looked like today....

From the top.


Someone enjoying the view....






22nd Jan 2009, 19:19
Tis a great spot, there's no denying. That wouldn't be Hugh Miller??

22nd Jan 2009, 22:13
Sorry, can't remember his surname, he used to do his proper flying with DMC (Derby Mountain Club), and did the poncing about stuff with Britannia.

Think he drove a BMW or a Merc, or som'at shiny.

Wasn't an Astra anyway.

23rd Jan 2009, 10:49
BBC News | Enlarged Image (http://news.bbc.co.uk/2/shared/spl/hi/pop_ups/08/uk_enl_1232637443/html/1.stm)

tony draper
23rd Jan 2009, 11:14
One likes lumpy landscape but prefer to view it through the windscreen of a warm motor vehicle nowadays.

23rd Jan 2009, 15:58
Because the bottom is lumpy...

23rd Jan 2009, 16:02