Author Topic: Cheddar Reservoir  (Read 16280 times)

Offline whitelackington

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Cheddar Reservoir
« on: November 30, 2007, 09:30:09 am »
Cheddar (Axbridge) Reservoir

with fantastic reflexion of Mendip

http://www.bdcc.co.uk/mendip.html

Where it says MAP

Click on MS VE ARIEL

Offline Cave_Troll

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Re: Cheddar Reservoir
« Reply #1 on: November 30, 2007, 10:06:12 am »
sorry, what am i supposed to be looking at?

Offline axbridgecaver

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Re: Cheddar Reservoir
« Reply #2 on: November 30, 2007, 10:25:57 am »

Offline graham

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Re: Cheddar Reservoir
« Reply #3 on: November 30, 2007, 10:28:06 am »
Hum, is that a
Quote
fantastic reflexion of Mendip
or an algal bloom?
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Offline Hughie

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Re: Cheddar Reservoir
« Reply #4 on: November 30, 2007, 10:43:00 am »
Surely you wouldn't see a reflection when viewed from vertically above.

The aspect of the "reflection" is wrong - the hills are to the north of the reservoir.

The image shows reasonably low water levels - can tell by the amount of concrete bank showing - and a heavy weed growth, that predominates on that side of the reservoir. Rich C attempted to catch some ducks sitting on this weed by diving through it and surfacing under them - but they were a bit wise for him!

Sorry Mick - not a fantastic reflection - just weed on some water.

Offline Hughie

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Re: Cheddar Reservoir
« Reply #5 on: November 30, 2007, 10:45:58 am »
Btw, Anne has skinny dipped in there (lager induced).

Offline Cave_Troll

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Re: Cheddar Reservoir
« Reply #6 on: November 30, 2007, 10:55:24 am »
there seem to be 2 digs not marked on this system
one is about 1.5 km north of the res and one is 1.5 km north east
anyone know who's digs they are and if they;ve found anything?

Offline mrodoc

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Re: Cheddar Reservoir
« Reply #7 on: November 30, 2007, 10:55:42 am »
Algal bloom i reckon

Offline whitelackington

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Re: Cheddar Reservoir
« Reply #8 on: November 30, 2007, 11:32:54 am »
I do not think agal bloom would grow in straight lines. :-\

Offline Hughie

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Re: Cheddar Reservoir
« Reply #9 on: November 30, 2007, 11:38:51 am »
It's bloody weed - I've swum in it.

Offline mak

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Re: Cheddar Reservoir
« Reply #10 on: November 30, 2007, 12:53:17 pm »
I do not think agal bloom would grow in straight lines. :-\
Thats probably because its a "reservoir" and thus man made - or are you arguing that straight lines mean its a reflection of mendip  :-\
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Offline Cave_Troll

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Re: Cheddar Reservoir
« Reply #11 on: November 30, 2007, 01:12:01 pm »
its probably due to the consipracy between the oil companies and the government

Offline graham

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Re: Cheddar Reservoir
« Reply #12 on: November 30, 2007, 01:54:35 pm »
its probably due to the consipracy between the oil companies and the government
:lol: :lol: :lol:
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Offline whitelackington

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Re: Cheddar Reservoir
« Reply #13 on: November 30, 2007, 02:44:25 pm »
there seem to be 2 digs not marked on this system
one is about 1.5 km north of the res and one is 1.5 km north east
anyone know who's digs they are and if they;ve found anything?

One of the digs is Carcass Cave
but that is marked as a dig

Next to Carcass is Shute Shelve Cavern
that is also being dug  :thumbsup:


Just noticed Charterhouse Cave is not marked on this map.  :-\

Offline Elaine

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Re: Cheddar Reservoir
« Reply #14 on: November 30, 2007, 03:08:57 pm »
Neither is Tynings Field Dig.


there seem to be 2 digs not marked on this system
one is about 1.5 km north of the res and one is 1.5 km north east
anyone know who's digs they are and if they;ve found anything?

I don't know where you mean Cave_Troll. About a mile North of the reservoir is Shipham Quarry. I can't think of any caves there. A bit further North is Winterhead. There is something there. But North East? That puts you on Warrens Hill. I know of nothing there. I used to live very near there and walked around there regularly.
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Offline whitelackington

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Re: Cheddar Reservoir
« Reply #15 on: December 01, 2007, 10:22:21 am »
If you go on the cave finder thingy

and go North along the A38 to the village of Barrow,
there are three small reservoirs, roughly the same size as Cheddar Reservoir.
You can very clearly see the   weed / algal bloom.
It does not look anything like Cheddar Reservoir"reflection"  :-\

Offline Elaine

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Re: Cheddar Reservoir
« Reply #16 on: December 01, 2007, 10:24:23 am »
there seem to be 2 digs not marked on this system
one is about 1.5 km north of the res and one is 1.5 km north east
anyone know who's digs they are and if they;ve found anything?

I don't know where you mean Cave_Troll. About a mile North of the reservoir is Shipham Quarry. I can't think of any caves there. A bit further North is Winterhead. There is something there. But North East? That puts you on Warrens Hill. I know of nothing there. I used to live very near there and walked around there regularly.

Oh. Hugh tells me you mean the quarries - sorry. I am a bit dense.
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Offline Peter Burgess

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Re: Cheddar Reservoir
« Reply #17 on: December 01, 2007, 11:12:39 am »
You have failed to grasp one of the simplest fundamentals of optics. If that is a vertical view of a flat partially reflective surface, then the image you can see in the reflection is that of what lies directly above the surface. That means that what you can see is partly the sky above, and the lighter patches are probably thin cloud, and partly features on the bed of the reservoir. A few of them can be identified as surviving features from the old land surface. Look at some pre-reservoir maps to see what I mean. Some of the marks are likely to be weed, and there are probably vestiges of marks made on the land when the reservoir was being built - tracks of heavy vehicles perhaps. The very strong linear feature might be one of those. To suggest this is a reflection of the Mendip Hills is ridiculous. To be able to identify the course of a lost lane or a ditch is actually much more interesting.

Offline Hughie

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Re: Cheddar Reservoir
« Reply #18 on: December 01, 2007, 12:16:10 pm »
Not sure if the strong linear line is pre reservoir (have you got any links to pre-res maps, Peter?) - but is a direct line out from the water tower where it enters the reservoir. My aquatic amphibious friends (Rich C and Mr Fi) tell me there is a wide trench running out from there. Water is also considerably colder (by several degrees) here - due to not having travelled far from the caves.


Offline Peter Burgess

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Re: Cheddar Reservoir
« Reply #19 on: December 01, 2007, 12:22:16 pm »
Hughie, it was the strong line I suspected was not old landscape, and something to do with the reservoir. I though a construction track but you clearly know something I don't. The pre-reservoir features are a bit vague but there are one or two I think. Try www.old-maps.co.uk - that's where I looked.

Offline Hughie

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Re: Cheddar Reservoir
« Reply #20 on: December 01, 2007, 01:40:45 pm »
Thanks, Peter.

At a guess, knowing that the water is extracted from the Axbridge side of the res, the obvious linear feature (a trench underwater) is a conduit to ensure incoming water travels towards the deeper part of the res.

Great fun there in the summer - although swimming, diving, fun etc is officially prohibited. Nice place to play with tanks and masks etc.

Offline Peter Burgess

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Re: Cheddar Reservoir
« Reply #21 on: December 01, 2007, 02:23:21 pm »
Are these aerial photos or satellite images? If the latter is the case case there will be no reflections of clouds in the water.

Offline whitelackington

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Re: Cheddar Reservoir
« Reply #22 on: December 02, 2007, 10:51:49 am »
Hughie, it was the strong line I suspected was not old landscape, and something to do with the reservoir. I though a construction track but you clearly know something I don't. The pre-reservoir features are a bit vague but there are one or two I think. Try www.old-maps.co.uk - that's where I looked.


I have gone on Somerset County Records   http://www.somerset.gov.uk/archives/
maps,
one shows the area of the yet to be constructed reservoir
but there does not seem to be an obvious feature from the old map,
 which shows through on this ariel view of the Cheddar reservoir.

Offline Peter Burgess

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Re: Cheddar Reservoir
« Reply #23 on: December 02, 2007, 11:41:41 am »
Sorry, Mick, then I take my hat off to you, it must be a reflection of the Mendip Hills. :ras:

Offline graham

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Re: Cheddar Reservoir
« Reply #24 on: December 02, 2007, 11:53:12 am »
The linear feature that shows on that image leads directly to a structure at the south east side of the reservoir. That same structure and a fair fainter linear feature can be seen on the image on Google Earth (which is not the same as that on MSN Virtual Maps).

It is clearly related to that structure and I strongly suspect is related to water flow.
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Offline Elaine

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Re: Cheddar Reservoir
« Reply #25 on: December 02, 2007, 12:33:28 pm »
Sorry, Mick, then I take my hat off to you, it must be a reflection of the Mendip Hills. :ras:

I am going to give in too! As despite the 'reflection' being on the South-East side of the reservoir (hills supposedly reflected are North of the res.), and the amazing coincidence that the straight lines are in line with the intake tower, and that we know that this is the shallower section of the res and therefore the water-weedier part, it is clearly a reflection of the Mendips. Clearly. Ga gaga
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Offline Hughie

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Re: Cheddar Reservoir
« Reply #26 on: December 02, 2007, 01:09:53 pm »
Sorry, Mick, then I take my hat off to you, it must be a reflection of the Mendip Hills. :ras:

I am going to give in too! As despite the 'reflection' being on the South-East side of the reservoir (hills supposedly reflected are North of the res.), and the amazing coincidence that the straight lines are in line with the intake tower, and that we know that this is the shallower section of the res and therefore the water-weedier part, it is clearly a reflection of the Mendips. Clearly. Ga gaga

Yes; yes it must be a reflection. Nothing else would make any sense.

Offline Stupot

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Re: Cheddar Reservoir
« Reply #27 on: December 02, 2007, 08:35:54 pm »
I have dived in there a few times and it's just thick canadian pond weed.

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Offline martinr

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Re: Cheddar Reservoir
« Reply #28 on: December 02, 2007, 09:10:05 pm »
Here is the latest image from Google Earth taken after the weed died back this autumn

http://img146.imageshack.us/img146/8827/axressq9.jpg

This was a low level flight as the reflection of the photograher can be seen.
Looks familiar, but I cant think why?
« Last Edit: December 02, 2007, 09:20:54 pm by martinr »

Offline whitelackington

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Re: Cheddar Reservoir
« Reply #29 on: December 03, 2007, 09:39:21 am »
Here is the latest image from Google Earth taken after the weed died back this autumn

http://img146.imageshack.us/img146/8827/axressq9.jpg

This was a low level flight as the reflection of the photograher can be seen.
Looks familiar, but I cant think why?



Nice one Martin

Offline martinr

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Re: Cheddar Reservoir
« Reply #30 on: December 03, 2007, 10:49:06 am »
Mick -

On a more serious note:

I think you may have a point about the lake showing a reflection of mendip.

Assume that the aerial photo was taken at a low altitude and at an oblique angle. Then a reflection could appear in the lake. The photo would then be manipulated to make it appear it was taken from directly above.

just a theory.

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Offline Hughie

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Re: Cheddar Reservoir
« Reply #31 on: December 03, 2007, 11:11:07 am »
Ok - so some of you think the greener colouring is a reflection of the hills. Yes? So the dark blue is reflection of the sky, yes?

If this is so, this indicates that the hill (generating the reflection) are to the south east of the reservoir (it's not a lake - it's entirely man-made).

I can assure you - having lived in this area for 40 odd years - there are no significant hills in this direction untill the Wedmore ridge - several miles away.

Also, bear in mind that as the reservoir is actually higher than the surrounding land it's unlikely to reflect any of it's direct locality.

It's weed!!!

Offline Elaine

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Re: Cheddar Reservoir
« Reply #32 on: December 03, 2007, 11:18:46 am »
Get a mirror, put it on the floor and look into it from any angle you like. You cannot get a reflection that simulates the one that is claimed is in the reservoir. It is just not possible for this to be a reflection of the Mendips. If it is, I will eat Hughie's caving hat.

And that is really not very nice at all.
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Offline Cave_Troll

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Re: Cheddar Reservoir
« Reply #33 on: December 03, 2007, 11:24:16 am »
If you look at the images of nearby trees and houses, you can see that it was taken from above and not at an oblique angle.
VE and GE both do take low level oblique arial photos, but they tend to be of major cities. I don't think medip qualifies

I see nothing in this image that looks anything like a set of hills or a reflection of a set of hills.

Offline whitelackington

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Re: Cheddar Reservoir
« Reply #34 on: December 03, 2007, 12:10:43 pm »
If you look at the images of nearby trees and houses, you can see that it was taken from above and not at an oblique angle.
VE and GE both do take low level oblique arial photos, but they tend to be of major cities. I don't think medip qualifies

I see nothing in this image that looks anything like a set of hills or a reflection of a set of hills.

I think you are confused.
We were talking about MENDIP

Offline Peter Burgess

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Re: Cheddar Reservoir
« Reply #35 on: December 03, 2007, 12:15:04 pm »
Whitelackington - the only man in the world who can inspect the back of his head by placing a mirror flat on the floor.

Offline Cave_Troll

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Re: Cheddar Reservoir
« Reply #36 on: December 03, 2007, 12:18:49 pm »
If you look at the images of nearby trees and houses, you can see that it was taken from above and not at an oblique angle.
VE and GE both do take low level oblique arial photos, but they tend to be of major cities. I don't think medip qualifies

I see nothing in this image that looks anything like a set of hills or a reflection of a set of hills.

I think you are confused.
We were talking about MENDIP
yes, no need to shout. I assume you're being pedantic about my typing mistake in missing the "n" out of Mendip.

Offline Cap'n Chris

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Re: Cheddar Reservoir
« Reply #37 on: December 03, 2007, 02:00:11 pm »
Strangely, if you pan north and zoom in on Blagdon Lake you can see a very good reflection of the Brecon Beacons. I think Whitelackington is on to something.

Offline Hughie

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Re: Cheddar Reservoir
« Reply #38 on: December 03, 2007, 02:33:31 pm »
Don't think it's the Brecons, Chris. You can plainly see the snow cap - maybe the Alps?

Offline Peter Burgess

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Re: Cheddar Reservoir
« Reply #39 on: December 03, 2007, 02:35:43 pm »
More likely the china clay tips around St. Austell.

Offline shotlighter

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Re: Cheddar Reservoir
« Reply #40 on: December 03, 2007, 02:46:47 pm »
Maybe the green & dark blue colouration is because it's a Blue Cheddar reservoir.
Now where are those crackers! :greed: