Flood Risk Assessment
A site-specific flood risk/consequence assessment accurately quantifies the flood exposure of an existing asset or proposed development. FRA’s will combine modelled flood data, where available, with a topographic survey to define the flood exposure of a site.
As well as our track record and ability to determine flood risk, we also consider the service to survey and provide property level flood resistance/resilience measures as another fundamental strength. We offer a completely independent and impartial service compliant with available flood resilience grants which combined with our comprehensive knowledge of the flood protection market enables us to advise and tailor a flood solution to be as effective as possible.
Flood risk legislation for planning applications differs in England, Wales and Scotland. The different policies can be accessed by clicking on the links below:
· England – National Planning Policy Frameworks (NPPF)
· Wales – Technical Advice Note 15 (TAN 15)
· Scotland – Scottish Planning Policy (SPP)
The specifics relating to each country will be discussed separately below:
In England, a flood risk assessment is required for any site development located within flood zones 2 & 3 or greater than 1 hectare in flood zone 1 in accordance with the National Planning Policy Framework (NPPF) section 15.
In Wales, a flood risk assessment is required for any site development located within flood zones 2 & 3 or greater than 1 hectare in flood zone 1 in accordance with Technical Advice Note 15 (TAN 15).
In Scotland, any development within a flood risk area requires a flood risk assessment with the level of detail determined by the perceived risk which is segregated into 3 main categories:
· Little to No Risk – Less than 0.1% (greater than 1 in 1000)
· Medium to Low Risk – Between 0.5% and 0.1% (between 1 in 200 and 1 in 1000)
· High to Medium Risk – Greater than 0.5% (less than 1 in 200)
We have extensive knowledge and experience of completing flood risk/consequence assessments for planning applications as well as existing assets with a view to determining their flood risk and providing flood resilience recommendations. In some cases, existing flood modelling information may not be available for the site in question or the data available might be construed to be too simplistic or inaccurate. If this is the case a hydraulic modelling study will be required to accurately evaluate the true flood risk at the site location.
Dependent on the scale of the development, FCI can advise on the likely requirements to obtain planning permission and can liaise with relevant authorities to ensure the planning requirements are fully complied with prior to commencing.
FCI work with numerous major insurance companies aiding them to better understand the flood risk exposure of their clients. Flood mapping software used by insurance companies offers a quick and simple evaluation of the perils associated with a specified area, however the flood extent mapping is produced from generalised flood modelling techniques and as such can occasionally produce erroneous results. By assessing flood risk at a site-specific level and utilising more refined flood modelling, FCI have been able to de-risk a number of sites previously shown at risk by insurance companies allowing large excesses to be quashed and affordable premiums to be obtained.
If a client has previously flooded or is deemed at risk, FCI’s main capability is to provide specific flood control measures to reduce or completely mitigate the impacts should a flood event occur. Recommendations can be tuned to the budget available and can include anything from simply relocating vulnerable assets within a building out of the predicted flood risk to large civil engineering perimeter solutions.
Through our background of surveying and assessing sites of Critical National Infrastructure (CNI), FCI considers defending these assets as a fundamental strength. Our staff throughout their careers have worked for the majority of major utility companies including every transmission and distribution network operator (electrical), nuclear power stations, waste and clean water treatment works, gas pressure reduction stations and telecommunication hubs and exchanges.
CNI sites are required to be protected to the highest standards possible as failure of any utility service can result in danger to life as well as extraordinary financial penalties. Therefore, defending CNI sites from flooding requires in depth surveying of all potential points of water ingress and installation of proven solutions supported by independent performance calculations as well as on site testing.
FCI’s staff have proven track record of completing flood defence schemes for CNI sites to the degree that our knowledge has been requested in high level strategic approaches by major utility companies.