Flood levels with storm Christoph

[saaby93]

Mersey is at 3.15metres = over its previous record of 3 metres
https://flood-warning-information.service.gov.uk/s...

[BMW A6]

Pardon my ignorance.

London has the Thames Barrier.

Is something similar in place up north?

[anonymous-user]

BMW A6 said:

Pardon my ignorance.

London has the Thames Barrier.

Is something similar in place up north?

Yes, they're called the Pennines and protects Yorkshire from overflowing effluent.

[ATG]

We're pretty near the source of the Severn. Our local streams and rivers shoot up and down rapidly in response to heavy rain, and within a day or two their water is in Shrewsbury, Worcester, etc. Looking out the window this morning, the river was out of its banks, meadows flooding, loads of standing water in the fields further back, traffic crawling through a flooded section of the main road through the valley. I imagine it's going to get a bit messy downstream.

[Red 4]

BMW A6 said:

Pardon my ignorance.

London has the Thames Barrier.

Is something similar in place up north?

It is raining. Quite a lot. There's a bit of snow too.

Major incidents declared in Greater Manchester, Cheshire (and probably Merseyside soon too).

I am building an Ark.

[Evoluzione]

Many in Manchester told to leave their houses
Here on the outskirts of Leeds/Bradford we had 6" of snow melt in 24 hrs followed by non-stop rain for about 48hrs now, so expecting the worst for low lying areas (not me). York will already have it i'm sure, but then they're used to it.
This has been no storm though, just lots of rain.

[abzmike]

BMW A6 said:

Pardon my ignorance.

London has the Thames Barrier.

Is something similar in place up north?

Isn’t the Thames barrier a defence primarily against tidal surge rather than rain filling rivers and flood plains?

[Not-The-Messiah]

BMW A6 said:

Pardon my ignorance.

London has the Thames Barrier.

Is something similar in place up north?

The Thames Barrier is for tidal storm surges not massive amounts of rain.

[NextSlidePlease]

Evoluzione said:

Many in Manchester told to leave their houses
Here on the outskirts of Leeds/Bradford we had 6" of snow melt in 24 hrs followed by non-stop rain for about 48hrs now, so expecting the worst for low lying areas (not me). York will already have it i'm sure, but then they're used to it.
This has been no storm though, just lots of rain.

Yep keep an eye on the river aire as it tends to burst its banks when the ripples of a family of ducks upset the levels never mind huge rainfall we have just had

Edited by NextSlidePlease on Thursday 21st January 01:22

[anonymoususer]

BMW A6 said:

Pardon my ignorance.

London has the Thames Barrier.

Is something similar in place up north?

Just old bikes. shopping trolleys, mattresses furniture, occasional bodies etc

[JagLover]

I remember that farmer getting all that flack a couple of months ago for dredging the local stream.

I wonder if he saved the locals from flooding or not?

[warch]

JagLover said:

I remember that farmer getting all that flack a couple of months ago for dredging the local stream.

I wonder if he saved the locals from flooding or not?

https://yourherefordshire.co.uk/all/news/flood-alert-river-lugg-north-of-leominster-includes-kingsland-and-yarpole/

I doubt it, localised clearing and dredging at best just kicks the can slightly further downstream. Catastrophic flooding (storm surges etc) is best avoided by less efficient drainage or flow not more effective drainage, hence the specification of attenuation tanks and similar measures for modern development schemes.

[powerstroke]

warch said:

https://yourherefordshire.co.uk/all/news/flood-ale...

I doubt it, localised clearing and dredging at best just kicks the can slightly further downstream. Catastrophic flooding (storm surges etc) is best avoided by less efficient drainage or flow not more effective drainage, hence the specification of attenuation tanks and similar measures for modern development schemes.

You mean the soak away idea rather than putting in
Storm drains on these new developments ? Yes that’s working well locally here
Existing property is now flooding because this cheep skate idea has failed ...

[saaby93]

Peak has now passed 2.85metres
https://flood-warning-information.service.gov.uk/s...
Were there abnormal floods there?

[saaby93]

River Bollin at previous peak
https://flood-warning-information.service.gov.uk/s...

[Pupp]

powerstroke said:

warch said:

https://yourherefordshire.co.uk/all/news/flood-ale...

I doubt it, localised clearing and dredging at best just kicks the can slightly further downstream. Catastrophic flooding (storm surges etc) is best avoided by less efficient drainage or flow not more effective drainage, hence the specification of attenuation tanks and similar measures for modern development schemes.

You mean the soak away idea rather than putting in
Storm drains on these new developments ? Yes that’s working well locally here
Existing property is now flooding because this cheep skate idea has failed ...

Infiltration depends on the ground conditions being suitable to absorb water. If ground water levels rise, then the capacity to infiltrate is obviously reduced. Attenuation basins are as much about keeping run off from hard surfaces to no more than greenfield rates if discharge to a watercourse is necessary. There is a sequential approach that, as a matter of national policy, requires infiltration to be used in preference to discharge.
The reality is climate change is occurring, storm events are more frequently occurring, and current building practices (led by customer expectation) are not sufficiently resilient to deal with the consequences.

Surface water flows are an entirely different modelling prospect to fluvial sources of flood. Dredging isolated lengths of watercourses makes no difference to overall flood risk.

[NerveAgent]

BMW A6 said:

Pardon my ignorance.

London has the Thames Barrier.

Is something similar in place up north?

The Mersey is (usually) pretty small and unremarkable in Manchester/Stockport

[JagLover]

Pupp said:

Surface water flows are an entirely different modelling prospect to fluvial sources of flood. Dredging isolated lengths of watercourses makes no difference to overall flood risk.

But might in houses a few yards from said watercourse.

[NerveAgent]

saaby93 said:

River Bollin at previous peak
https://flood-warning-information.service.gov.uk/s...

I live about half a mile from the Bollin, we had a lot of rain. Half my garden is under about 5cm of water, the other half 5cm of snow.

[carlove]

Evoluzione said:

Many in Manchester told to leave their houses
Here on the outskirts of Leeds/Bradford we had 6" of snow melt in 24 hrs followed by non-stop rain for about 48hrs now, so expecting the worst for low lying areas (not me). York will already have it i'm sure, but then they're used to it.
This has been no storm though, just lots of rain.

York was pretty high on my way to work, higher than our normal monthly flood, but the road past Clifford's tower isn’t flooded yet so it ain’t the worst,
Surprisingly none of the roads were flooded due to the councils usual crap drains. Normally when flooding half the roads around the city end up flooded because of the drains blocking up.