dataset · England
Rivers and Sea defended and undefended flood risk depths – climate change
Please note: this data is currently produced for areas where our Flood Zones datasets are based on national modelling. Areas where depth data is currently unavailable in this dataset are indicated using the Unavailable attribute. These datasets show the depth of flooding from rivers and sea for the following annual exceedance probabilities (AEP) or chance of flooding each year, taking into account the possible effects of climate change (detailed below): ● Undefended: 0.1% AEP (1 in 1000) Rivers/
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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: 57.2
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
- river and sea flood depth · undefended and defended flood depth products · AEP 0.1% (1 in 1000) rivers and sea · AEP 1% (1 in 100) rivers and 0.5% (1 in 200) sea · depth bands: up to 150mm, 150–300mm, 300–600mm, 600–900mm, 900–1200mm, 1200–2300mm, over 2300mm · climate change depth scenarios
- Coverage docs-verified
- Bounding box lat 49.943° to 55.816°, lon -6.236° to 2.072° (England per ENTRY regions) · Climate change scenario epoch 2080s (2070–2125) for rivers; sea allowance to 2125. No observation period stated.
- Update frequency docs-verified
- As needed (asNeeded; no fixed schedule). Last updated 24 September 2026
- Formats docs-verified
- OGC API - Features · WMS · GDB (zipped file geodatabase) · PDF (product description) · LYRX (layer file)
- Access docs-verified
- Free/open under Open Government Licence v3.0; no public access constraints; no authentication listed
Useful for
- Use cases llm-inferred
- Climate-change river and sea flood depth context for FRA sensitivity testing on sites in England · Defended vs undefended depth comparison for residual flood risk discussion in planning or drainage reports · Regional flood depth screening to scope where detailed hydraulic modelling is needed
- Audience llm-inferred
- flood consultants · drainage engineers · planners · hydrologists · GIS analysts
Limitations
- Constraints docs-verified
- Indicative only; not suitable for showing whether an individual property is at risk of flooding · Only produced where Flood Zones datasets are based on national modelling; areas without depth data are flagged with the Unavailable attribute · Defended products assume defences operate as designed; asset failure or removal scenarios are not included · Climate change scenarios assume existing defences function as at present day; no future changes to defence design or operation
Evidence
- https://environment.data.gov.uk/api/file/download?fileDataSetId=2ebb2fe0-06a3-45a2-a366-f3124668682c&fileName=Rivers_and_Sea_Climate_Change_Depths.lyrx
- https://www.data.gov.uk/dataset/67a734bb-2b7b-491a-aafd-3f7e52c8d7f3/rivers-and-sea-defended-and-undefended-flood-risk-depths-climate-change
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.