Fathom-UK


Comprehensive flood modelling for the whole of the United Kingdom

Fathom-UK provides an alternative view of flood risk in the UK.

Using a combination of world-leading research and cutting edge modelling techniques, we are able to accurately simulate flood events for both current and future climate scenarios.

If you would like to learn more about Fathom-UK, please get in touch.
10
m
resolution.
10
return periods
From 1:5 year to 1:1000 year.
Return periods can be categorised to suit your risk appetite.
3
Future climate
scenarios
Fluvial,
pluvial & coastal
flooding
Assess the impact of
multiple flood types.
Terrain Data
Incorporates the latest LiDAR data, in addition to other terrain and hydrography datasets.
Flood Defences
Unique detection algorithm that identifies flood defences where data are not available.
Fathom-UK offers deterministic projections for the entirety of the UK.
Created by some of the world's leading academics and scientists working within hydrology, Fathom-UK is based on pioneering methods that have been developed in-house.

Underpinned by decades of peer-reviewed research, our model couples a rich understanding of data with the latest hydraulic modelling techniques.

The result is accurate flood hazard data that is able to provide high-resolution predictions for both current and future climate scenarios - a first for flood modelling in the UK.

By integrating these datasets into Fathom’s hydraulic modelling framework, Fathom-Global yields flood hazard maps of multiple return periods for every river on the planet.
Fathom-UK yields flood hazard maps of multiple return periods for every river in the country. This has been achieved through Fathom's unique channel estimation methods, which explicitly represent river channels in the absence of accurate hydrographic information.

When incorporated alongside precise terrain data, multiple perils and defence algorithms, users are presented with accurate and realistic patterns of flood inundation.
Fathom-UK
compared to
Environment Agency (EA) Data
Validation
Fathom is validated against EA, Northern Ireland EA, Scottish Environment Protection Agency, and Natural Resources Wales flood data.
Environment Agency (EA) Data
compared to
Fathom-UK
Validation
Fathom is validated against EA, Northern Ireland EA, Scottish Environment Protection Agency, and Natural Resources Wales flood data.
Fathom-UK simulates climate states for 2020 2030, 2050 and 2070.

By 2050 there will be a

24%

increase in the number of properties in the UK at substantial risk of flooding.

Climate Change is changing the way that we experience events.

By 2050, over 1.3 million properties in Great Britain will be at risk of substantial flooding. Our data provides the right people with the correct information - so that they can mitigate risk.

Fathom-UK helps to quantify flood risk and asset exposure for multiple climate scenarios: 2020, 2030, 2050 and 2070. This is the first flood model in the UK to factor in the impact of climate change, rather than just relying solely on historic records. By doing so, Fathom takes the UK's understanding of flood risk one step further and supports users to understand how risk will change over time.

With new PRA legislations requiring insurers to have a  greater understanding of flood risk in the future, our model provides accurate predictions for pluvial, fluvial and coastal perils. Fathom-UK's inclusion of 10 return periods means that users have access to a wide collection of event frequencies.

The hydraulic model projects changing flood behaviour arising from Intergovernmental Panel on Climate Change (IPCC) climate model ensembles.

Future climate scenarios follow an emissions pathway from the UKCP18 dataset. Projections are made under the Representative Concentration Pathway 8.5 trajectory.

Changes in flood risk
Flood risk in 2020
By 2050, properties at risk of flooding will increase by 24%. This chart demonstrates that.
Changes in flood risk
Flood risk in 2050
By 2050, properties at risk of flooding will increase by 24%. This chart demonstrates that.

Fathom-UK yields a complete

index of flood defences for the

whole of the UK.

Fathom maps 100% of flood defences. Without defences in place, flood risk drastically increases

Fathom's unique levee detection algorithm  enables Fathom-UK to detect and incorporate defence data where it may not be available publicly.


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Testimonial
// Fathom delivered high-quality analyses to improve the global flood hazard classification in ThinkHazard! and helped make the data available for disaster risk management activities in developing countries.//
Dr Brenden Jongman
Disaster Risk Management Specialist,
GFDRR