High water at Hull Pot
- Thread starter Pitlamp
- Start date
alanw
Well-known member
(Facebook) Horton in Ribblesdale Chat has a video of Hull Pot full to the brim.
https://www.facebook.com/NorthYorkshireWeatherUpdates/ has lots of videos of flooded roads
https://www.facebook.com/NorthYorkshireWeatherUpdates/ has lots of videos of flooded roads
thehungrytroglobite
Well-known member
This was yordas this evening! Had at least 10mm of rain since then too. Water was rising at about 2ft per 10-15mins. Such a surreal experience. We went to see the waterfall but found a lake instead, right up to the entrance and even covering the initial steps down. Never got to see the waterfall but still feeling lucky to have witnessed this! [Disclaimer; I am both a caver and a cold water swimmer, I often swim in rivers in winter so am experienced with currents and such. I did not go into the main chamber as I didn't know what the flow was like there and didn't go beyond the arch in case it sumped.]
Andrew N
Active member
Incredible photo! Thanks for sharing.
I once saw water actually flowing out of the entrance to Yards Cave, to join the large stream flowing down the valley outside. This was fairly early one morning, and the wall on either side of the road below the cave had been smashed down for a distance of 3 or 4 metres, so the water must have been a lot higher overnight; but I didn't have a camera with me!
Must have been light rain at Newby Vis bot says 63mm recorded at Selside
HardenClimber3
Member
Great pic.
Soon after the arch the ground drops away quite sharply (enough to need to swim)
I guess there is quite a strong current out to the left when it is this full.
thehungrytroglobite
Well-known member
I presume it would depend on the output - I can't remember what it is like from memory as I've never needed to study it before! If the water is going from A-B then I would expect there to be more of a current in the middle ie. in the line of flow - in which case think of it like a big river, and the section I was in was more like an eddy or pool at the side. But it could also be that it was a lake with little current for the reasons you highlighted. If I had the right kit I would have gone to find out, but was not properly equipped as we weren't expecting to find it almost sumped!
Pitlamp
Well-known member
I suspect the restriction causing Hull Pot to back up and overflow is the choke blocking the bottom 30 m of the Hull Pot shaft (which is reached by "Dead Fish Crawl" - the passage exposed when the downstream sump is empty in extreme drought). As a result I doubt that Douk Gill is subjected to the 14 bars pressure which it would have been if the head was 130 m. Continued exploration is needed to verify (or otherwise) this suggestion though.
I'd be wary of getting sucked into the downstream passage or one of the Main Chamber digs in such conditions.
Mr Dinwiddy
Member
In a similar manner to The Hungry Trogolbites impressive venture, I was wondering on the merits of kayaking the Hull Pot Beck and doing a circuit of Hull Pot lake. I don't think you would get sucked down into the underworld, it looked quite still on the video.
What a great picture!
When Yordas main chamber is flooded there is very little in the way of a strong flow to sweep you away – the main chamber floods precisely because the downstream outlet is very restricted/choked.
Many years ago, on a very wet day, we spent a fun afternoon swimming around the main chamber lake watching the water level slowly rise; we eventually called it a day, with a very short free dive to daylight, when the entrance archway finally became flooded.
psychocrawler
Member
Great pic of Yordas. I bet Douk Gill was resurging impressively though if Hull Pot was full. Is anyone doing anything in Douk Gill these days?Access used to be an issue but in these more enlightened times…..? Both caves at Dock Gill deserve a modern look/approach.