Author Topic: Rivers of Wales...  (Read 1675 times)

Online Pegasus

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Rivers of Wales...
« on: December 17, 2016, 07:45:03 pm »
Came across this wonderful map of Wales, showing all the rivers. It's more like a work of art --- and it explains where all that rain goes, and why Wales is so green.....and has some superb caves under it...




You can buy prints I believe...

http://dafyddelfryn.bigcartel.com/

Offline ChrisJC

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Re: Rivers of Wales...
« Reply #1 on: December 19, 2016, 07:10:25 pm »
I like.

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Offline moletta

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Re: Rivers of Wales...
« Reply #2 on: March 02, 2017, 10:03:08 am »
I want!

Online Ian Adams

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Re: Rivers of Wales...
« Reply #3 on: March 02, 2017, 12:52:37 pm »
Very cool .... I would if it could be superimposed over a geological map (of limestone)

 :)

Ian
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Offline paulc

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Re: Rivers of Wales...
« Reply #4 on: March 02, 2017, 01:18:02 pm »
Fantastic, that is really interesting.

Offline adam

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Re: Rivers of Wales...
« Reply #5 on: March 02, 2017, 02:02:40 pm »
Anyone with access to GIS can create and personalise their own version of this by downloading the shapefile from OS OpenData. Covers the whole of GB. https://www.ordnancesurvey.co.uk/business-and-government/products/os-open-rivers.html

Offline Mike Wood

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Re: Rivers of Wales...
« Reply #6 on: March 02, 2017, 10:40:09 pm »
Very cool indeed.. reminds me of a maze.
I started to try and trace a walking route from North to South, without crossing a stream, but my head started to hurt  :blink:

Offline ZombieCake

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Re: Rivers of Wales...
« Reply #7 on: March 02, 2017, 11:03:03 pm »
Awesome, kind of dendritic and fractal like, reminds me a bit of those old slo-mo films of roots taking shape as a seed sprouts.

Offline mrodoc

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Re: Rivers of Wales...
« Reply #8 on: March 03, 2017, 06:51:58 am »
What are marvellous idea. It is a sort of negative of a relief map.

Offline robjones

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Re: Rivers of Wales...
« Reply #9 on: March 03, 2017, 05:17:42 pm »
I started to try and trace a walking route from North to South, without crossing a stream, but my head started to hurt  :blink:

Can't be done: there are a couple of locations in mid Wales where bogs discharge streams that flow both eastwards and westwards!  :bounce:

Offline kay

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Re: Rivers of Wales...
« Reply #10 on: March 03, 2017, 07:45:09 pm »
Awesome, kind of dendritic and fractal like, reminds me a bit of those old slo-mo films of roots taking shape as a seed sprouts.

Same reason really. It's the sort of pattern you get when there is a flow which is dispersed at one end and concentrated at the other. So water joining into streams and rivers, roots dispersing into the soil, blood vessels  - I've seen a similar pattern of logging roots in a forest.

It also interests me that if you look at a street map view of Google maps of the Dales, it doesn't show any details other than the surface water flows ... so you see a clear delineation of the limestone areas by a line of springs or a line of sinks.
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Offline mikem

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Re: Rivers of Wales...
« Reply #11 on: March 03, 2017, 07:50:43 pm »
The map of Scotland isn't as impressive, as I expect is the English version!

Mike

Online Fulk

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Re: Rivers of Wales...
« Reply #12 on: March 03, 2017, 11:45:55 pm »
Yeah, but I bet the Mojave Desert one's crap.   ;)

Online RobinGriffiths

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Re: Rivers of Wales...
« Reply #13 on: March 04, 2017, 01:21:32 am »
Previously I'd assumed that apart from the Dee and the Severn, they all stayed in Wales. On that map though there are loads of rivers spilling eastwards.

One criticism is that streams get the same weighting as rivers giving a false impression of actual flow regimes.

Robin :annoyed:

Offline mikem

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Re: Rivers of Wales...
« Reply #14 on: March 04, 2017, 07:10:02 am »
At one point on the Wye, England & Wales are on the "wrong" banks...

Mike

Offline kay

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Re: Rivers of Wales...
« Reply #15 on: March 04, 2017, 12:41:36 pm »
At one point on the Wye, England & Wales are on the "wrong" banks...

Mike

Where's that, than? Just north of Monmouth, as the A40 comes down the hill?

Is Welsh Bicknor actually in England? - looks like it from Google maps.
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Offline kay

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Re: Rivers of Wales...
« Reply #16 on: March 04, 2017, 12:46:52 pm »
Previously I'd assumed that apart from the Dee and the Severn, they all stayed in Wales. On that map though there are loads of rivers spilling eastwards.


Having been brought up between Severn and Wye, I was very aware that they both rose in Wales (very close together) despite both flowing through England for much of their length (Wye is the river that Hereford is on) - so quite surprised that that one hadn't worked its way into your consciousness. But then, I speak as a person who, as a mature adult, had to check on a map to see whether Leeds was N or S of Sheffield. :-[
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Offline mikem

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Re: Rivers of Wales...
« Reply #17 on: March 04, 2017, 01:36:22 pm »
Yes, between Monmouth & Symonds Yat. Having come from Leeds I now spend quite a bit of time on the Wye...

Mike

Offline Brains

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Re: Rivers of Wales...
« Reply #18 on: March 04, 2017, 02:21:21 pm »
Looks very similar to Lichtenberg Figures - the discharge patterns from lightening

Offline kay

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Re: Rivers of Wales...
« Reply #19 on: March 04, 2017, 02:47:55 pm »
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Offline welshcaver96

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Re: Rivers of Wales...
« Reply #20 on: March 07, 2017, 05:51:14 pm »
Really interesting to see this i have not seen anything as such it just goes to show wales is magnificent and has allot to reveal  ;D