Are there any Geologists/water experts out there?

[Dimelda]

Geologists ? / experts on water / flooding? -- who could give (paid) advice on a problem in our back garden, part of which has become inexplicably waterlogged, when a pool of water suddenly appeared. The below ground drainage system has been inspected, & is not the cause. The house: terraced, built 1916, in Clapham. Anyone knowledgeable in these matters, please get in touch. Thanks.

[intexasatthe moment]

I'm sure this can't be the reason in your case but when this happened in an elderly friend's garden it turned out that someone in a house in a road running at right angles had a tap with attached hosepipe not completely turned off .

Have you looked at old maps (local authorities often have these on line ) to see if there are any water courses ?

[Dimelda]

Thanks for your message, intexasatthe moment ! Hosepipes not properly turned off: yes, it regularly happens. Could well be that. How did your friend establish that this was the cause?

Water courses! Do u mean a spring or underground stream ? I'm a novice at this sort of thing. However Thames Water is coming to investigate - but not sure I hv any great faith in them.

Thanks for those suggestions. I do appreciate it. Dimelda (Marian).

[Sue]

My daughter is a hydrogeologist but doesn't live locally.

I will ask if she can shed any light without making a site visit.

[Sue]

My daughter says it should be tested by water company for potential mains leak.

If it isn't that, you can email BGS on [email protected] giving location, spatial extent of area and timescale over which it's been happening.

Usually needs site investigation, is clearly localised to you and something has changed.

Sometimes failed soakaway if they have had an extension it may drain to soakaway. They clog up over time.

Sorry for weird grammar, I've copied and pasted from her WhatsApp posts!

ETA: BGS is British Geological Survey. My daughter works there.

[Dimelda]

Thank you so much for this wonderful advice. It's really kind of you. and thank your daughter, too, for her suggestions. Best regards. Marian.