Flood Risk Assessment, Twickenham, London.
Oct 28, 2013

RAB Consultants has completed a flood risk assessment (FRA) for a proposed change of use from a vacant storage building to a drama workshop. Our assessment to meet the requirements of the National Planning Policy Framework, our flood risk assessment involved the following:

* A site visit to assess flood risk at the site
* Topographic Survey of the site
* Assessment of collected Environment Agency data
* Comparison of Environment Agency modelled levels in the adjacent River Thames and levels around the site
* Assessment of the risk of flooding from all sources including surface water, groundwater and drainage related
* Desk based assessment of suitable mitigation measures to offset any risk of flooding.

While the site was shown to benefit from formal tidal defences there remained a residual risk from these River Thames defences in the event of combined high tide and fluvial flows overtopping and a breach event.

Despite this we were able to demonstrate an effective mitigation strategy that will ensure the occupants remain safe from all sources of flooding for the lifetime of the proposed development.

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