dataset · England
Rivers and Sea 3.3% defended flood risk depths – present day
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 or chance of flooding each year: ● Defended: 3.3% AEP (1 in 30) Rivers/Sea The data is presented using these depth bands: ● Up to 150mm ● 150 – 300mm ● 300 – 6
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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, 3.3% AEP (1 in 30) defended · flood depth bands: up to 150mm, 150-300mm, 300-600mm, 600-900mm, 900-1200mm, 1200-2300mm, over 2300mm
- Coverage docs-verified
- bounding box lat 49.943° to 55.816°, lon -6.236° to 2.072° (entry regions: England) · present day
- Update frequency docs-verified
- as needed (asNeeded)
- Formats docs-verified
- OGC API - Features · WFS · WMS · GeoPackage (zipped) · GeoJSON (zipped) · File Geodatabase (zipped) · lyrx · PDF
- Access docs-verified
- free; Open Government Licence v3.0; no public access constraints; no API key or auth listed; attribution required: © Environment Agency copyright and/or database right 2026
Useful for
- Use cases llm-inferred
- indicative 1 in 30 year defended flood depth screening for FRA baseline at a site · constraints mapping of defended flood depth bands for drainage and site layout options · GIS overlay of flood depth bands with development boundaries for early-stage planning screening
- Audience llm-inferred
- flood consultants · drainage engineers · planners · GIS analysts
Limitations
- Constraints docs-verified
- single scenario only: 3.3% AEP (1 in 30) defended, no other return periods · defended products assume flood defences operate as designed; asset failure or removal scenarios are excluded · not suitable for showing whether an individual property is at risk of flooding · depth data is unavailable in some areas, flagged by the Unavailable attribute · updates are as needed, with no fixed schedule
Evidence
- https://environment.data.gov.uk/api/file/download?fileDataSetId=54d9e4b8-2778-4ed0-b6dc-ddc385386fce&fileName=Flood_Map_for_Planning_Rivers_and_Sea_3_3_AEP_Defended_Depths_present_day.gdb.zip
- https://www.data.gov.uk/dataset/2b1dc7a4-ff9f-42fd-9971-11638eabf814/rivers-and-sea-3-3-defended-flood-risk-depths-present-day
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.