dataset · England
Rivers and Sea 3.3% defended 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. This dataset shows 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): ● Defended: 3.3% AEP (1 in 30) Rivers/Sea T
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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
- flood depth from rivers and sea · 3.3% AEP (1 in 30) defended flood depth · depth bands from up to 150mm to over 2300mm · climate change depth scenarios (river 2080s central; sea upper end to 2125)
- Coverage llm-inferred
- England (catalogue region); docs give extent 49.943° to 55.816° latitude, -6.236° to 2.072° longitude · 2080s epoch (2070-2125) for rivers climate change scenario; sea upper end allowance to 2125
- Update frequency docs-verified
- as needed
- Formats docs-verified
- OGC API - Features · WMS · WFS · Download · GeoPackage (zipped) · GeoJSON (zipped) · File Geodatabase (zipped) · ArcGIS layer file (.lyrx) · PDF (product description)
- Access docs-verified
- Free, open download under the Open Government Licence; no public access constraints; no authentication indicated
Useful for
- Use cases llm-inferred
- FRA screening: defended 1-in-30 river and sea flood depths with climate change allowances for a site or catchment · Drainage and civils option appraisal: mapping flood depth bands across a development area · GIS overlay of flood depth bands on site boundaries and land-use layers for early-stage planning
- Audience llm-inferred
- flood consultants · hydrologists · drainage engineers · GIS analysts · planners
Limitations
- Constraints docs-verified
- Depth data unavailable in some areas, indicated by the Unavailable attribute · Only produced where Flood Zones datasets are based on national modelling · Only the 3.3% AEP (1 in 30) defended scenario is covered · Defended depths exclude flood defence asset failure or removal scenarios · Climate change scenarios assume existing defences perform as at present, with no future design or operation changes · Not suitable for showing whether an individual property is at risk of flooding
Evidence
- https://environment.data.gov.uk/api/file/download?fileDataSetId=7844932f-d689-471c-aa1e-76ee0cbd51ef&fileName=Flood_Map_for_Planning_Rivers_and_Sea_3_3_AEP_Defended_Depths_Climate_Change.gdb.zip
- https://www.data.gov.uk/dataset/9d5e56d5-7713-42a1-890f-3d0a3e895cd5/rivers-and-sea-3-3-defended-flood-risk-depths-climate-change
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.