UK FloodMap4

Ambiental Risk Analytics Launches UKFloodMap4™

In News by Ambiental Environmental Assessment

Ambiental Risk Analytics Launches UKFloodMap4™

The most detailed flood map for the UK

Our Sister Company, Ambiental Risk Analytics has released its fourth generation national-scale flood dataset, which lets insurers assess flood risk at building level. Covering 100% of the UK, with a full range of return periods, and incorporating the most up-to-date river flow and rainfall data, UKFloodMap4™ provides the most detailed flood maps currently available for the UK. Responding to a need expressed by insurers, it also includes enhanced approaches for resolving off-floodplain risks.

Built using Flowroute-i™, Ambiental’s world-class flood modelling software, UKFloodMap4™ equips insurers with accurate, detailed and easy-to-understand flood information for all major sources of flooding: river, tidal, and surface water (pluvial), as well as reservoir and groundwater. It includes depth and velocity information at the individual property level, enabling more accurate and competitive technical pricing and loss accumulation estimation.


Helping insurers get an accurate view of flood risk in the UK

Dr. Justin Butler, CEO of Ambiental, commented: “Flood risk in the UK has been increasing significantly, and recent research suggests this trend is likely to continue. The launch of UKFloodMap 4, ahead of next year’s implementation of FloodRE, the new flood re-insurance scheme, is very timely. This new, fully updated dataset, will help insurers to get a more complete view of flood risk in the UK, which cost the country over £1bn last year alone.

Feedback from our clients and contacts in the insurance market suggested that existing flood data products often fail to pick up significant volumes of ‘off floodplain’ risks, so we decided to enhance the granularity and comprehensiveness of our UKFloodMap products to address this need.

There is no single definitive flood risk data source used throughout the UK insurance industry, with individual companies often having different views of this growing risk. However, by deploying this dataset throughout the organisation, as well as to MGAs and brokers in a highly cost-effective manner – either stand-alone or in conjunction with other flood datasets – can greatly improve insurers’ risk selection/ management, understanding, and hence pricing, of uncertainty”.

FloodMap4 uses over 1,000,000 hydraulic models making it the most accurate flood model in the UK

David Martin, Ambiental’s Technical Director, observes: “We have included around 30% more rivers than in competing products and have completely re-modelled the entire UK landmass – involving over 1 Million hydraulic models! We have used the latest and best available ‘LiDAR’ topographical data, together with the most current hydrological and river flow data from the UK’s leading flood research centre – the Centre for Ecology & Hydrology (CEH). We have scaled up our international flood mapping and modelling operations in recent years, enabling us to develop and distribute high-precision flood maps for almost any country in the world.”

UKFloodMap4™ has validated extremely well against recent flood events in the UK as can be seen from the image below with Ambiental UKFloodMap4™ flood outline (in blue) showing excellent correlation to the 7th July 2012 flood event in Yealmpton, Devon (red outline).


Steven Brown Ambiental Associate

Interested in a using UKFloodMap4™?

To get a quote or to discuss what you need, contact the Flood Team

Call the team on +44 (0) 1273 006 900  or email at [email protected]

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