Risk of Flooding from Rivers and Sea: UK Flood Likelihood Bands

RoFRS maps show flood risk from rivers and the sea across the UK, factoring in flood defences. The data presents risk as four likelihood bands, from 'High' (≥3.3% annual chance) to 'Very Low' (<0.1% annual chance), and includes depth likelihoods for five thresholds. Produced by the Environment Agency, the dataset was last updated on 2026-06-26.

Use Cases

• Assess property-level flood exposure based on probabilistic risk bandings.
• Model potential flood damage scenarios using the provided depth likelihoods (0.2m to 1.2m).
• Plan infrastructure and flood defence investments by identifying high-risk zones.
• Validate hydrological models against the Environment Agency's official flood risk assessment.

Strengths

• Defines four specific annual probability bands with clear numerical thresholds (e.g., ≥3.3% for 'High').
• Includes flood depth likelihoods for five concrete thresholds (0.2m, 0.3m, 0.6m, 0.9m, 1.2m).
• Explicitly models the mitigating effect of flood defences, a key real-world factor.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• Data may reflect geographic bias inherent to uk_data.

Provenance

Source

Environment Agency

Collection Method

Probabilistic modeling of flood risk from rivers and the sea.

Freshness

Last updated 2026-06-26 13:56:43.935157; freshness should be verified.

Geography

United Kingdom