Author Topic: Flooding forecast Tues/wed  (Read 2198 times)

Offline Brains

  • forum hero
  • *****
  • Posts: 2414
Re: Flooding forecast Tues/wed
« Reply #25 on: January 20, 2021, 01:16:58 pm »
You may mean "Hull" Pot? That's the really big one that overflows in extreme conditions.

Hunt Pot would be interesting in this weather...
Brain(s)-rot setting in from lockdown... Yes I meant Hull, but Hunt would also be impressive  :o

Offline SamT

  • Global Moderator
  • forum hero
  • *****
  • Posts: 6388
    • The Eldon Pothole Club
Re: Flooding forecast Tues/wed
« Reply #26 on: January 20, 2021, 01:22:54 pm »
24 hours up to 7am, there was 100mm in North Wales
...and it's still raining hard.

Noticed yesterday on the Radar that Wales seemed to be copping for it, and looked set to continue that way.  Good paddling conditions arriving I reckon.

Online mikem

  • forum hero
  • *****
  • Posts: 4134
  • Mendip Caving Group
Re: Flooding forecast Tues/wed
« Reply #27 on: January 20, 2021, 01:43:58 pm »
Another 30mm up to midday, most rivers will be too high (& access roads likely to be flooded), especially as they did still have snow

Offline NewStuff

  • Vocal proponent of Open Access
  • junky
  • ****
  • Posts: 820
  • www.dddwhcc.com
    • Deep Dark Dirty WetHoles
Re: Flooding forecast Tues/wed
« Reply #28 on: January 20, 2021, 06:20:40 pm »
24 hours up to 7am, there was 100mm in North Wales
...and it's still raining hard.

Noticed yesterday on the Radar that Wales seemed to be copping for it, and looked set to continue that way.  Good paddling conditions arriving I reckon.

2 of my 3 routes to work are flooded, and the third had some sizeable soggy spots on the way home at 14:30. Lots more local flooding, some of it pretty serious. Gonna be an interesting few days.
Permission? Wassat den?

Offline AR

  • Black shadow
  • forum hero
  • *****
  • Posts: 1337
  • PDMHS, ATAC, ANHMS
Re: Flooding forecast Tues/wed
« Reply #29 on: January 20, 2021, 08:54:38 pm »
Still raining lots in the Peak tonight, I've been to Buxton Morrisons for the weekly shop and the A6 in Ashwood Dale is closed (which I was expecting) and the A515 has some large puddles in places. I hear Bakewell is having problems too.
Dirty old mines need love too....

Online cavemanmike

  • forum star
  • ****
  • Posts: 654
  • ucet
Re: Flooding forecast Tues/wed
« Reply #30 on: January 20, 2021, 09:20:47 pm »
Been snowing for the last 3 hours in North Wales  :weep:

Online Speleofish

  • addict
  • **
  • Posts: 143
Re: Flooding forecast Tues/wed
« Reply #31 on: January 20, 2021, 11:36:16 pm »
Our local rivers in Shropshire have just reached their second highest recorded level (only a couple of centimetres below the maximum). And we're not in one of the highest risk areas....

Offline pwhole

  • forum hero
  • *****
  • Posts: 2365
  • TSG, DCA, PDMHS
    • Phil Wolstenholme website
Re: Flooding forecast Tues/wed
« Reply #32 on: January 20, 2021, 11:40:22 pm »
I popped down to Sheffield city centre at teatime, and the River Sheaf coming out of the bottom end of the Megatron tunnel was bulging upwards from the force of the Don hitting it at 90° - it was quite a sight. Thankfully the river walls we worked on years ago seem to be holding up, but there's one that was never fixed that really worries me, and I'm going to pop down in the morning and see if it's still standing. Well the road will be underwater if it isn't, so I should know before I get there.

Online mikem

  • forum hero
  • *****
  • Posts: 4134
  • Mendip Caving Group
Re: Flooding forecast Tues/wed
« Reply #33 on: January 21, 2021, 06:59:00 am »
Weatheronline records 147mm in Snowdonia during last 48 hours, only 66 at Shap.

Offline Pitlamp

  • forum hero
  • *****
  • Posts: 5641
Re: Flooding forecast Tues/wed
« Reply #34 on: January 21, 2021, 08:09:46 am »
48 hour total at Clapham in the Dales is 69 mm. It's come fairly steadily, so an average of only 1.44 mm per hour. Reckon we've got off lightly this time. Not so far away from here some folk are having a bad time I'm afraid.


Online mikem

  • forum hero
  • *****
  • Posts: 4134
  • Mendip Caving Group
Re: Flooding forecast Tues/wed
« Reply #35 on: January 21, 2021, 08:12:51 am »
R.Dee in Llangollen is highest some of my friends have seen it. Fortunately the town is well above river level, but other places can't be getting away so lightly.

Offline SamT

  • Global Moderator
  • forum hero
  • *****
  • Posts: 6388
    • The Eldon Pothole Club
Re: Flooding forecast Tues/wed
« Reply #36 on: January 21, 2021, 09:46:48 am »
My dads cottage in Corwen overlooks the dee valley - but from high up on the berwyns luckily.   The fields below are often completely flooded.  Be interesting to see what its like at the moment then.

Offline Pitlamp

  • forum hero
  • *****
  • Posts: 5641
Re: Flooding forecast Tues/wed
« Reply #37 on: January 21, 2021, 10:20:33 am »
Just been to Clapham shop; the beck going through the village is high but not especially high.

Online Pegasus

  • NCC
  • Administrator
  • forum hero
  • *****
  • Posts: 2700
Re: Flooding forecast Tues/wed
« Reply #38 on: January 21, 2021, 10:23:53 am »
Live weather forecast from Ingleton - woken by hail on the windows during the night, blizzards, gales, rain this morning.  My rain gauge is to check the small stream that runs down the field opposite - if it's full, there been a lot of rain  ;D  Despite the horrid conditions, the stream's not that high, however I'm still not going outside until Summer....

Offline ditzy

  • The ditzy caving
  • forum hero
  • *****
  • Posts: 1262
Re: Flooding forecast Tues/wed
« Reply #39 on: January 21, 2021, 12:46:59 pm »
went for a walk around the local area this morning and the marsh was rather moist. we had some snow last night, still a little here that settled but melting quickly. pavement a little slippy though.

Offline Pitlamp

  • forum hero
  • *****
  • Posts: 5641
Re: Flooding forecast Tues/wed
« Reply #40 on: January 21, 2021, 02:04:30 pm »
For anyone pining for the Dales, here's a snap of Clapham waterfall this afternoon; as you can see it's not very high at all.

Offline PeteHall

  • Global Moderator
  • forum hero
  • *****
  • Posts: 1405
Re: Flooding forecast Tues/wed
« Reply #41 on: January 21, 2021, 02:08:44 pm »
Does the reservoir act as a buffer for Clapham Beck?
The distance between stupidity and genius is measured only by success.

Offline Pitlamp

  • forum hero
  • *****
  • Posts: 5641
Re: Flooding forecast Tues/wed
« Reply #42 on: January 21, 2021, 02:29:00 pm »
Does the reservoir act as a buffer for Clapham Beck?

No, not really. I once witnessed a pulse hit the upstream end of the Lake, then start flowing over the spillway at the downstream end in a matter of minutes. What's flowing over that waterfall is normally a very good indication of what's coming out from the GG system at Clapham Beck Head.

Online mikem

  • forum hero
  • *****
  • Posts: 4134
  • Mendip Caving Group
Re: Flooding forecast Tues/wed
« Reply #43 on: January 21, 2021, 02:38:03 pm »
The water in the pond doesn't have anywhere else to go except over the fall.

Offline PeteHall

  • Global Moderator
  • forum hero
  • *****
  • Posts: 1405
Re: Flooding forecast Tues/wed
« Reply #44 on: January 21, 2021, 02:45:43 pm »
I wasn't sure if there was a controlled outfall, so the level rises in a rainfall event releasing it more slowly over a period of time. It's a very common feature in stormwater drainage systems to reduce flash-flooding.
The distance between stupidity and genius is measured only by success.

Offline Ian P

  • menacing presence
  • **
  • Posts: 198
Re: Flooding forecast Tues/wed
« Reply #45 on: January 21, 2021, 04:31:08 pm »
I wasn't sure if there was a controlled outfall,

As a Northern caver, I was impressed/ surprised on my first visit to Mendip and a trip down St Cuthberts. “We will just turn the water off first”  :o

I presume the same system for Swildons is still been developed  ;D

Offline PeteHall

  • Global Moderator
  • forum hero
  • *****
  • Posts: 1405
Re: Flooding forecast Tues/wed
« Reply #46 on: January 21, 2021, 04:45:37 pm »
Swildon's already has a fairly effective attenuation system. The flow entering the cave is restricted, which is why the water backs up in the pool outside. The attenuation only ceases to function when it spills over the top and into the entrance as happened towards the end of last year. After the rainfall event, the pool drains down again, so the high flow lasts longer, but there is a lower peak flow. Bit like the justification for lockdown, slow the spread, flatten the peak. The event lasts longer, but at a more manageable level.
The distance between stupidity and genius is measured only by success.

Online alanw

  • addict
  • **
  • Posts: 130
Re: Flooding forecast Tues/wed
« Reply #47 on: January 21, 2021, 05:58:18 pm »

As a Northern caver, I was impressed/ surprised on my first visit to Mendip and a trip down St Cuthberts. “We will just turn the water off first”  :o


Come up to Gaping Gill next time a winch meet is running (please may it be May). Fell Beck is dammed and the water (usually) is diverted down the Rathole.

When it's not diverted:

Offline alastairgott

  • forum hero
  • *****
  • Posts: 1941
Re: Flooding forecast Tues/wed
« Reply #48 on: January 21, 2021, 06:03:01 pm »
Do the hydraulic ram pumps outside the ingleborough showcave ever go any faster in high water conditions?  ;D

Offline Pitlamp

  • forum hero
  • *****
  • Posts: 5641
Re: Flooding forecast Tues/wed
« Reply #49 on: January 21, 2021, 07:02:35 pm »
No, the pipes limit the flow through them.

 

Main Menu

Forum Home Help Search
SimplePortal 2.3.5 © 2008-2012, SimplePortal