Tuesday, 5 October 2021

UPDATE: Risk of flooding of Wealdstone Brook reduced after overnight warning

From:  https://check-for-flooding.service.gov.uk/target-area/062WAF38BrentBks

Flood alert for Silk Stream and the Deans, Edgware, Dollis, Mutton and Wealdstone Brooks

We have issued a Flood Alert. Rain is forecast to affect London on Monday night, 4 October into Tuesday morning, 5 October. It is currently unclear which areas will experience the heaviest rain. If the heaviest rain affects the Hendon, Wembley, Harrow, Wealdstone, Edgware or Stanmore areas there is the possibility that rivers could overtop their banks. Flooding to low lying land, roads and riverside gardens is possible on Monday night. Surface water flooding may also affect these areas. We recommend you monitor local water levels and weather conditions. Consider putting your flood plan into action. You should avoid walking, cycling or driving through flood water. We are monitoring rainfall and river levels and are checking rivers for blockages. We will update this message at 10am on Tuesday morning or earlier if the situation changes. 



The risk of flooding from the Silk Stream and the Deans, Edgware, Dollis, Mutton and Wealdstone Brooks has now reduced and levels have fallen below levels of concern. No further flooding to fields and roads is expected, however there may be standing water seen for several days

1 comment:

Philip Grant said...

Part of the problem is due to large new housing developments being recommended for approval, and approved, despite Thames Water saying in their comments that the surface water sewers do not have the capacity to take the extra water run-off they will cause.

The planning consents usually include a condition about this, as for the example below from the 1 Morland Gardens consent letter, but whether these are actually enforced is another matter! Would Brent's planners refuse to allow a newly built block of flats to be occupied because Thames Water were unhappy with the drainage "upgrades" the developer had put in place?

Example of a surface water drainage planning condition:

'The development shall not be occupied unless confirmation in writing has been submitted to and approved in writing by the Local Planning Authority, in consultation with Thames Water, that either 1) all surface water network upgrades required to accommodate the additional flows from the development have been completed; or 2) a housing and infrastructure phasing plan has been
agreed with Thames Water to allow additional properties to be occupied.'

'Reason: The development may lead to flooding and network reinforcement works are anticipated to be necessary to ensure that sufficient capacity is made available to accommodate additional flows anticipated from the new development. Any necessary reinforcement works will be necessary in order to avoid sewer flooding and/or potential pollution incidents.'