Author Topic: Cheddar Reservoir  (Read 16924 times)

Offline whitelackington

  • forum hero
  • *****
  • Posts: 6533
  • Pyrenees Potholer Digger
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

  • forum hero
  • *****
  • Posts: 1474
  • SUSS
    • http://www.flickr.com/photos/cave_troll/
Re: Cheddar Reservoir
« Reply #1 on: November 30, 2007, 10:06:12 am »
sorry, what am i supposed to be looking at?

Offline axbridgecaver

  • obsessive maniac
  • ***
  • Posts: 322
  • Axbridge Caving Group
    • Redcliffe Caves
Re: Cheddar Reservoir
« Reply #2 on: November 30, 2007, 10:25:57 am »

Offline graham

  • Retired
  • forum hero
  • *****
  • Posts: 10943
  • UBSS, Speleo-Club de Perigueux, GSG, SUI
    • UBSS
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?
Caving is for Life not just for Christmas

Offline Hughie

  • forum hero
  • *****
  • Posts: 1630
  • SMCC & ACG (finally paid my subs)
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

  • forum hero
  • *****
  • Posts: 1630
  • SMCC & ACG (finally paid my subs)
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

  • forum hero
  • *****
  • Posts: 1474
  • SUSS
    • http://www.flickr.com/photos/cave_troll/
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

  • forum hero
  • *****
  • Posts: 2289
    • Peter Glanvill's Webpage
Re: Cheddar Reservoir
« Reply #7 on: November 30, 2007, 10:55:42 am »
Algal bloom i reckon

Offline whitelackington

  • forum hero
  • *****
  • Posts: 6533
  • Pyrenees Potholer Digger
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

  • forum hero
  • *****
  • Posts: 1630
  • SMCC & ACG (finally paid my subs)
Re: Cheddar Reservoir
« Reply #9 on: November 30, 2007, 11:38:51 am »
It's bloody weed - I've swum in it.

Offline mak

  • A Butcombe drinking
  • obsessive maniac
  • ***
  • Posts: 305
  • mmmm.........beer Wessex Cave Club
    • Wessex Cave Club
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  :-\
I have transitory tourettes syndrome - I swear profusely in the presence of idiots :tease:
Spider hole Digger (Deeper than Templeton)

Offline Cave_Troll

  • forum hero
  • *****
  • Posts: 1474
  • SUSS
    • http://www.flickr.com/photos/cave_troll/
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

  • Retired
  • forum hero
  • *****
  • Posts: 10943
  • UBSS, Speleo-Club de Perigueux, GSG, SUI
    • UBSS
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:
Caving is for Life not just for Christmas

Offline whitelackington

  • forum hero
  • *****
  • Posts: 6533
  • Pyrenees Potholer Digger
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

  • forum hero
  • *****
  • Posts: 2185
  • Axbridge Caving Group
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.
Wot tiny writing!

Offline whitelackington

  • forum hero
  • *****
  • Posts: 6533
  • Pyrenees Potholer Digger
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

  • forum hero
  • *****
  • Posts: 2185
  • Axbridge Caving Group
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.
Wot tiny writing!

Offline Peter Burgess

  • forum hero
  • *****
  • Posts: 9118
  • Left ukcaving by this name
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

  • forum hero
  • *****
  • Posts: 1630
  • SMCC & ACG (finally paid my subs)
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

  • forum hero
  • *****
  • Posts: 9118
  • Left ukcaving by this name
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

  • forum hero
  • *****
  • Posts: 1630
  • SMCC & ACG (finally paid my subs)
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

  • forum hero
  • *****
  • Posts: 9118
  • Left ukcaving by this name
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

  • forum hero
  • *****
  • Posts: 6533
  • Pyrenees Potholer Digger
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

  • forum hero
  • *****
  • Posts: 9118
  • Left ukcaving by this name
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

  • Retired
  • forum hero
  • *****
  • Posts: 10943
  • UBSS, Speleo-Club de Perigueux, GSG, SUI
    • UBSS
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.
Caving is for Life not just for Christmas