The Uk's Unique 1mm Square - Map Mystery
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- čas přidán 7. 05. 2022
- In this weeks video we tackle a Map Mystery.
Specifically one that has been troubling me for a while. The question as to whether we can identify the spot on a Map and then find it out in the field is high on todays agenda! Join us as we take a stroll around various stunning parts of the Wiltshire countryside.
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Good fun, but in chalk country the concept of a watershed is somewhat moot. Most rainfall will soak into the chalk before it even reaches a stream, and contributes to an underground aquifer which feeds springs like the one mentioned in the video. The upper surface of the aquifer doesn't necessarily follow exactly the profile of the land surface above.
Indeed. Once in the Chalk beds, it can go in any direction, depending on the relative saturation levels in every direction
Indeed, mostly the watershed division depends on the geology and morphology, not so much a geometric calculation
The best layman's way of thinking about water in chalk beds is to think of them as being like a bath sponge, which absorbs water, and dribbles away in all directions. Very different for harder and more structured and fissured rocks
The nature of rainfall is that the surface is quickly saturated any subsequent drops will run off in a direction dictated by gravity
@@denisrobertmay875 That is not the case to any material extent on Chalk downland. The soils are very thin, and the water goes rapidly into the chalk. In the case the video examines, there is a large area without any streams, and the sources of the three rivers arise from the spring lines, where the chalk sits on an impermable layer. For your theory to be correct there would be surface streams starting close to the "1mm square". In chalk areas, the water in the chalk is extracted for drinking water, and needs no reservoir building. As I said above, chalk is like a giant bath sponge.
Now you need to map the underground aquifers and get really complicated.
I was going to refer to the same thing, it's not a square mm, It's as big as the water table
Paul and Rebecca, I absolutely love your videos. Thank you so much for taking all the trouble and care you do in preparing them.
As a reenactor I can assure you that when it rains on Roundway Down it simply soaks into all your kit and at the end of the weekend ends up in Yorkshire or Cardiff or Portsmouth or Devon or...:-) Loved the video and nice dog, what's his or her name?
"Bourbon"
does he take the biscuits ?
Hahaha .... he meant the dog 🐕!!
@@janinapalmer8368 😂
Completely agree with that. Not to mention showers at crucial moments while you're putting your tent up.
It was great fun watching this. Apart from the interesting premise I loved the little jokes, visual and otherwise, you sprinkled in there. Also, I appreciate the huge amount of work and preparation that must have gone into this little project. It must have been fun planning it all. Well done, keep up the good work.
As both a Wiltshire resident, and drainage engineer... this was amazing! Well done to you both...
Good video both fascinating 👌
These videos are one of my happy places! 1:35 the face has me rolling with laughter! Needle in the haystack moment.
Thanks very much, another entertaining and informative video. I’m a Devizes resident and I’ve never felt more proud of Roundway hill! We’ve always known it’s a lovely place to go I’d not realised it was so unique…
Living near the continental divide for the U.S. (Idaho Montana border), this video really hit home. There are three triple points fairly nearby (by U.S scale)
- Snow Dome, British Columbia (flows to Pacific ocean, Arctic ocean, and Hudson bay)
- Triple divide Peak, Montana (flows to Pacific ocean, Hudson Bay, and the Atlantic)
- Three waters mountain, Wyoming (drains to Pacific Ocean, Atlantic Ocean, and the Gulf of California)
Really loved that thanks. What a lovely place that was. How good are you finding that spot.. thanks for taking me along. Please stay safe and take care
You two are just great! This is genius, I absolutely love it, finding the precise spot of a three way watershed!! Keep doing what you do, the world needs people with curious minds like yours. Your vids are always interesting, they make me realise how much there is out there that is simply fascinating, and that this country has so many layers of intrigue. It's sometimes hard to love Britain, but you two remind me that we are lucky to live here, it's all out there!
there's a couple more triple points in the UK. Rivers Clyde, Tweed and Annan, flowing into the Clyde estuary, the Irish Sea and North Sea respectively. Ben Lui in the highlands has a watershed to the Clyde (via Loch Lomond), Atlantic (via Loch Awe) and North Sea (via the River Forth)
Not forgetting the rivers Tyne, Wear, Tees, and Eden, flowing into the North sea and Irish Sea.
Fascinating theeory, in a fascinating area. I come from Marlborough, my grandfather was born in Etchilhampton and previously the family cames from around Devizes, Potterne and Melksham. My great-uncle drove the pumping engine at Crofton, and my birth was within a couple of hundred metres from the river Kennet. So, I claim this as personal turf.
As someone who does flood resilience planning I have often undertaken similar exercises to that whichyou have done on this video, and it is good stuff. However, it is only dealing with the run-off, the direction of travel of the surface flows. It would also be useful to understand the geology and the hydrogeological landscape, because a great deal of this water will percolate and will travel undergound - the underlying geology may very often be confusing when relating it to the topography.
Any declination or bending of laid down sedimentary layers can mean that whereas on the surface a run-off potential is leading south, leaving a hill's summit behind it, the underlying inclined layers may actually turn percolating water to head in an entirely different direction, even north under the summit and out be through a spring heading in the opposite or entiely different direction.
Given the compaction of soil (what there is of it on the chalk downs!) by the action of sheep, it is likely that most water will be distributed by running off, but there will be oddities that will throw the calculations out.
As map lovers, I heartily recommend to you the online resources of the British Geological Survey (BGS). The limited numbers of hydrogeological maps are both fascinationg and very pretty!
Thank you! I was skimming the comments for exactly this kind of stuff.
That's so interesting. Nothing is ever straight forward is it?
+1 for BGS map reco - recently discovered them, fantastic, fascinating and detailed (and as you say, pretty). View on a PC, though, it's so hard to scroll in on a phone.
The best way to start the day. Cup of coffee with Paul and Rebecca (and the dog) of on their travels with her another fantastic story that has clearly been well researched. Love it you guys!! 😍
Brilliant video. You’re doing something with the maps I never thought of, and now want to… if I had the time. Thank you for finding something else really interesting & new!
I can tell you're getting more creative and ambitious with your editing structure. Fantastic to see! Very fresh!
Brilliant video. Love your persistence in finding this unique spot!
There is another triple point between North Sea, Bristol Channel and Irish Sea, looks to be close NW of Baldwin's Gate on A53 SW of Stoke.
Lived for a while looking over one of the low points of the Pennine watershed. The lowest point on that watershed is used by the Leeds Liverpool Canal, but curiously this is not a cutting or tunnel but an aqueduct.
And another one in Northamptonshire between the Thames, the Great Ouse and the Severn
Especially loving this video, as I know all these places well from the Marlborough Down Challenge running event!
Loving the humour in this and previous videos always enlicits a smie from me :) lovely doggo!
Nice video - and yet again I've learnt something!
Thank You for coming up with these gems!
To see all this joy, enthusiasm, effort, dedication and effort about …? You two are absolutely delightful.
Hey you're in my neck of the woods 😊..... I'll have to check out that beautiful spring. Reminds me of Luccombe Springs that I visited recently and didn't know about until reading 'Hidden Wiltshire' blog.
just stumbled across your channel from the youtube gods algorithm. i love geography and the uk ( i am from the peak district) just having a binge watch of your videos and subscribed. keep up the ace videos. great production quality and you have a natural ability infront of camera
You’re taking an analytical approach. I think I’d try an empirical approach - drop a bit of peppermint scented water at your proposed equi-shedding point and see (well sniff) which river it turns up in. That’s what plumbers do when they want to check for a leaky sewer!
I would of course suggest the dropping of food colouring to check which river becomes blood.
there's a spot in Pennsylvania that is similar: the head waters of the Allegheny which flows into the Gulf of Mexico, the Susquehanna which flows into the Chesapeake Bay and the Genesee which flows into the Great Lakes are within a very small area northeast of Coudersport, PA.
Yes and my great-uncle had a farm where I was told the three rivers started! I don't know who owns the land now.
Years ago I had to do a similar survey of an area of about 50 Sq Km. It looked pretty daunting until I converted it to Sq Miles and then only had to deal with a bit over 19 of them which was way more manageable.
Square light years simplify the problem further.
@@Gribbo9999 Not enough resolution. Misplace one decimal point and you're looking at the wrong side of the solar system entirely.
Do you have any idea how long it takes to walk that back?
😖You realise that the area you examined remained EXACTLY THE SAME in extent? Why not use chains ⛓ as your scale? After all, we are in the medieval era . . . NOT! Look out for ‘Here be dragons’ on your map 🥴!
@@sirmeowthelibrarycat But the fate of one molecule of H2O depends on nano metric distances, 1 square millimetre is a huge area
@Denis Robert May 😖 Indeed, but that is not the point. I am arguing for the use of mathematical and scientific measurements that are constant and replicable. Metric units are such measures. That is all.
Your bookcase at the beginning of the video is amazing!
You know, I enjoy all your videos, but this may be the best one you've done yet!
Very interesting research! Right length, lovely photography! Thank you!
a interesting piece of research. and good to see Rebecca out and about again
Loved that thanks. Actually love all your videos.
Hi Paul & Rebecca , as you say love a good map mystery , great vid , cheers Tim, from Taunton
Haha, fantastic! I absolutely love your railway videos, but this one was wonderful in that it brought up all sorts of memories of A-level geography and going out doing field work (followed by liquid refreshment at the local hostelry!) 🤓
Fascinating that one point could be the watershed to distribute into three three distinct geographically separate waterways. And I love the hands on nature of the work…and especially the crafted Blue Peter sticky tape type map and pen drawn water vectors. It was like a throwback to the wonderful Open University programmes on geography and geology I used to love watching 😎
Yes, I did used to watch these things as a child. I was considered a bit odd 🙄
Cheers guys, great fun as ever 💚👍🍻
Great scenery. Very interesting video. Many thanks.
Liked, subscribed and commented. I'm a new watcher and living the channel.
Fascinating and very entertaining. Enjoyed that. Beautiful dog. Thank you.
One of your most entertaining videos to date, excellent work
What a great video. Thank you for making
Great editing Rebecca!
This was mainly filmed in what I regard as my backyard and am so impressed with the amount of research you do!
Great little video, I enjoyed it a lot.
Absolutely amazing. Hats off to you both
omg i love your funny starts lmao , hello again paul and rebecca , thank you for another very interesting video, looks like the dog had a great time lol , well done guys 😊
I love watching your videos so interesting.
Great video, & interesting topic, well presented with humour, thank you! 🙏
it’s been 22 years since i’ve seen such mapmaking via cutting and overlaying,i half expected a 3d build with how you were diligently putting things together
you raised an interesting geographic and geological point about the landscape of that area, it really is an interesting story
I suspect that Rebecca would get upset when it came to the sculpting a plle of clay on the table bit. "But this is important!"
Wonderfully done.
We did this in the Cub Scouts with polystyrene ceiling tiles and a hot wire to cut them.
Different times 🤣
@@ABrit-bt6ce When Paul starts carving mountains out of mashed potato, you know things are going to get interesting.
I did that once with my child for a school project. We lived in the North Wessex Downs between Andover and Newbury close to Fosbury Hill. Copied the a local map multiple times, then pasted each sheet onto corrugated card about 3 mm thick. Then cut around the contours and then stuck each layer together like an wedding cake but about 10 layers. Took ages and fingers hurt. From memory it was about 750mmx400mm. Trouble was it started to warp so had to glue it to a chipboard base.
Fair play really enjoyed this! Thanks for your efforts ✌️❤️
Great story again with some great editing.
Oh we loved this one - fantastic viewing before Sunday dinner.
I love a map mystery, thank you very much. I live on a watershed where the rain on one side takes about an hour to reach the sea and on the other it takes days.
interesting edge topography. past volcanism in vicinity?
@@hardrays Could be, I'll check, but I think it's because of glaciation.
Next week a shrunken Paul, Rebecca and friend following a split drop by another friend!
That was a great vlog and amazing how you come up with ideas for your vlogs.
We did a similar thing during lockdown (on paper!) when we noticed that the Severn, Thames, Nene and Great Ouse watersheds almost meet at a "square" point. They meet at two triangle corners, of course, but they are super close.
The important question is, how do you pronounce Nene?
Actually I can't even remember how I pronounce it any more...
@@PiousMoltar didn't realise there were variations. Wikipedia has an interesting section about its etymology and pronunciation under the River Nene entry. (en.m.wikipedia.org/wiki/River_Nene) Thanks for a thought provoking comment.
It does not matter who’s who here you are a right pair,you both exist as one by the look of it in tandem,you complete each other, nice to see.
Brilliant guys!! I live in the shadow of Roundway Hill and although the countryside is spectacular I had know idea it was unique. Thanks for posting!!
Indeed, great video, thanks. Actually somewhere ive been before too. Inadvertently walked past this very spot walking the Mid Wilts Way last year. Suddenly feel like an intrepid explorer ha!
What I found most entertaining besides watching the dog enjoying its walk was the great and varied expressions on Rebecca's face, it appeared that she was thoroughly enjoying herself!
Fine looking dog . As always interesting content an beautiful scenery .
I'm sure there will be a point somewhere around Crewe where your split raindrop could finish up in the Severn, Trent and Mersey, so ending up in the Celtic Sea, North Sea or Irish Sea.
I love this part of the world. Thanks for the interesting video.
Great to see your dog sniffing out the Wiltshire triangle with you. I think we all want to know his name!!
Very well presented as always very enjoyable.
Good luck from Spain!!
"Bourbon" they replied to an other comment :)
@@aramisortsbottcher8201 thanks ... though I don't think I like my bourbon quite that colour. *winks*
Hi from Texas. Great video, a very interesting subject you've presented here.
OMG amazing video awesome you guys really help me when I down. Thanks
Very thought provoking, well done and thanks you three
Y'all clearly have a lot of fun with these videos. :D
Great vid! Looks so much fun too :)
From Bromham, can see the woods from the back window. I know where I'm taking the kids this weekend. Thanks for an amazing video and for hopefully helping get the kids excited about the landscape they live in.
Amazing work team 👏
One of my best friends' family owns much of the land from there up across to Swindon so I've spent decades of my youth causing havoc in those parts.
I have a vague memory of someone mentioning something about 3-points but evidently it didn't register at the time so your video is most welcome.
A pretty humble water divide when you compare it with the Himalayas, the Andes, etc ;) so humble that I expected it to be Canadian!
Unique like this channel. Another great video.
Youve visit my old neck of the woods as they say. The spring head you visited tastes wonderful clean,fresh and free.
It's always surprised me that the Wansdyke is so little known as it's huge and a natural walking route with great views along a ridge line. I used to walk it frequently as part of a long circular route starting at Avebury, then to the Ridgeway and then south to where it crosses the Wansdyke. From their, west along the Wandsdyke, crossing the A361 to Morgan's Hill, which is where Wikipedia believes is the hydrological triple divide where rainfall drains into the English Channel, Severn Estuary and the North Sea. That's about 6km from Roundway hill...
From Morgan's Hill I would go via the Old Roman road to Cherhill Hill and the Landsdowne Monument, and then back to Avebury by way of Beckhampton. A great walk, full of ancient mysteries but maybe a bit long for some.
Although 51 years ago I seem to remember my school House was Wandsdyke, but then it was Marlborough.
Great fun video. excellent mapping exercise. loved it!
Brilliant video and interesting as always :)
Very interesting, thank you. Beautiful countryside with so much history.
You are not the only one I some times go out to see some thing and forget some thing. The last time I forgot my watch so I didn't know what the time is.
Thanks great fun to watch. As a bonus learned something new too. Well done
Facial expressions and the humour from Rebecca is fantastic :)
Great video with fun editing and a "suspense build-up" 👍👍 Interesting investigation adventure with Bourbon 👌🐕
You guys are great, love the history and locations.
Melbourne, Australia
Hello Paul and Rebecca. I really enjoyed this vid, as we live on a watershed (Avon-Nene in Northamptonshire) and I love the idea that puddles on one side of the road end up in the North Sea, and on the other, the Bristol Channel. You might want to check out the land between Staverton and Charwelton (also in Northamptonshire), where rivers rise flowing west (Leam (Avon/Severn)), south (Cherwell/Thames) and east (Nene). Not quite as good as yours, because both the Thames and the Nene flow into the North Sea, but pretty good 🙂
There should be a stake driven into the ground at these places.
Marvellous P&R. Great editing as well
I got a bit lost. Is 'Sheer Drop' anywhere near 'Sheerness'? Fascinating and entertaining article. Well done you two
This confused me too!
@@pwhitewick 😁👍
The brewery used to be in Shere, south of Guildford. It's now in Dorking.
What a cracking vid!
As a map lover (cartophil???/geo geek??) that was right up my street!
Subscribed!
Welcome
Brilliant!! as ever. Thanks
Reminds me of 9 Standards Rig on the Coast to Coast - the point where a drop of rain lands and either ends up in the Irish Sea or the North Sea.
Great video! :-)
You beat me to it!
Liked this one a lot Paul, and loved the Philip Glass meets the Penguin Cafe music too!
Been meaning to use that for an age
So is this the UK equivalent of a Continental Divide? Good detective work as always...
A bit like that, yes. The Continental Divide is probably the most famous watershed (water/drainage divide) in our western countries. Any detectable water body, as small as a tiny dribble of a ditch, follows sole sort of watershed that determines where rainfall goes. The scale can be as large as continental, down to national and be different from one house to the next too. This point here is special for being a three-way divide on a large island that you could regard like a continental divide, since all three flowing directions lead to different coasts. I'd say that's fairly uncommon for Europe in general, though not unique.
But yeah, good comparison!
In the US(lower 48 states) has two bigger continental divides. One that goes up the East Coast, any water to the east of the divide runs into the Atlantic Ocean, and to the west runs into the Gulf of Mexico. The Western(Great) Continental divide to the the east the Gulf of Mexico and the the west the Pacific Ocean. Then one smaller one The great basin that water goes into the Gulf of California. Technically there are two small ones that mainly run against the border with Canada and sometime go into the top of the US.
This is the UK equivalent of Triple Divide Peak, a relatively inconspicuous mountain in northern Montana - not far from the Canadian border - where a raindrop can split in three and wind up in the Pacific, Atlantic or Arctic Oceans!
Nah! That'll be the featherbed moss. In a small area of moorland just to the west of Barnsley is the featherbed moss from which in a space of less than 100m you can stand near a source of the Mersey and a source of the Don. The first heading to the Irish Sea with the other heading towards the Humber and the North Sea. Warning, it gets very boggy (or very snowy sometimes, but perhaps not just now!)
@@stmisbehavin662 If you want to get real confused look up Divide Creek.
Ahh you came up as suggested as I watched the Rudgwick stuff yonks ago…..Subbed🙌😅
Thank you for a very interesting video. There is also an unusual watershed on Seat Sandal in Cumbria where rain flows to one of three places from the Solway to Morecambe Bay.
Love you two, some people think history (and geology in this case) is dry and boring, but your videos are funny and intersting, thanks for making them. 😊
Videos about hydrology are never dry! :~P
So you're saying you've found the triple point of water?
✅️
I’m so glad I’m not the only person who loves old maps 😝
Thanks for sharing.
Great work. Great Vid.
Good detective work!
This must have taken a while - great stuff (I’m now having geography a-level flashbacks!)
Sitting at home looking out to the Leipzig Plantation. How interesting that you identified it as a ‘unique place in Britain’.
I’ve long been fascinated by the Wiltshire Triangle as you describe it. That water flows south, west and east from a relatively small area. Pondering that just about made my daily drive to Swindon bearable. I’m absolutely convinced that water is the key to the Avebury complex, and why it was so sacred to our ancestors.
Very nice locations, need to visit.
Lots of fun, this video, thanks!