dataset · England
Risk of Flooding from Rivers and Sea
Risk of Flooding from Rivers and the Sea (RoFRS) shows the chance of flooding from rivers and the sea taking into account the presence and condition of flood defences. It is our main way of communicating flood risk from rivers and sea to the public through our ‘Check Your Long Term Flood Risk’ service on gov.uk. While flood defences reduce the level of risk they do not completely remove it. For example, water can flow over the top of the defence, or they can fail in extreme weather conditions or
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Licence: ["There are no public access constraints to this data. Use of this data is subject to the licence identified.", "There are no public access constraints to this data. Use of this data is subject to the
Evidence quality: 50.2
Listed in data.gov.uk public catalogue API on 2026-10-16; relevance/value screened (haiku).
Metadata checked: 2026-10-14T13:20:00.000Z
What's in it
- Data offered docs-verified
- flood risk from rivers and sea, accounting for flood defence presence and condition · likelihood bandings: High (>=3.3%/yr), Medium (1%-3.3%/yr), Low (0.1%-1%/yr), Very Low (<0.1%/yr) · likelihood of flooding at depths 0.2m, 0.3m, 0.6m, 0.9m, 1.2m
- Coverage llm-inferred
- England
- Update frequency docs-verified
- asNeeded
- Formats llm-inferred
- WMS · PDF · LYR
- Access docs-verified
- Free/open: Open Government Licence v3.0; no public access constraints
Useful for
- Use cases llm-inferred
- Flood risk screening of England development sites, including areas behind flood defences · Early-stage site selection and flood constraints mapping using likelihood bands · Flood depth exceedance mapping at 0.2m-1.2m thresholds for site layouts · Client-facing flood risk context comparable to Check Your Long Term Flood Risk
- Audience llm-inferred
- flood consultants · hydrologists · planners · GIS analysts · civils engineers
Limitations
- Constraints docs-verified
- Complex dataset; preview only available at certain zoom levels · Web Mapping service set to 1:50 000 scale; visibility depends on the client software · Probabilistic overall risk, not specific to an event or scenario · Flood defences reduce but do not remove risk; defences can be overtopped or fail
Evidence
- https://environment.data.gov.uk/api/file/download?fileDataSetId=cf7e9513-2004-4ab7-befa-12294eedde0f&fileName=RoFRS Product Description.pdf
- https://www.data.gov.uk/dataset/943d2bbb-aa08-45d1-96cb-42556cd01d94/risk-of-flooding-from-rivers-and-sea2
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.