dataset · England
Reservoir Flood Extents - Fluvial Contribution (National)
This data shows the extent of river flooding added to the reservoir model to determine the impacts of failure on a wet-day. It is not exactly the same as the flooding from rivers shown in the Flood Map for Planning from Rivers and Sea. The fluvial-only extent should only be used to see the impact the reservoir flooding has. Flood extents are not included for smaller reservoirs or for reservoirs commissioned after the reservoir modelling programme began in October 2016. Attribution statement: © E
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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: 67.7
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
- reservoir flood extent (fluvial contribution, national)
- Coverage llm-inferred
- England
- Update frequency docs-verified
- quarterly
- Formats docs-verified
- GeoPackage · GeoJSON · File Geodatabase · OGC API Features · WFS · WMS
- Access docs-verified
- Free and open; no public access constraints, licensed under the Open Government Licence
Useful for
- Use cases llm-inferred
- Reservoir failure flood-impact context for site appraisals near reservoirs in England · Screening fluvial flood extent from reservoir failure scenarios for FRA or emergency planning inputs · Comparing reservoir-driven fluvial extent with Flood Map for Planning extents to explain differences
- Audience llm-inferred
- flood consultants · hydrologists · GIS analysts · planners
Limitations
- Constraints docs-verified
- Flood extents not included for smaller reservoirs · Flood extents not included for reservoirs commissioned after October 2016 · Not exactly the same as flooding from rivers in the Flood Map for Planning; fluvial-only extent is for seeing reservoir flooding impact only
Evidence
- https://environment.data.gov.uk/api/file/download?fileDataSetId=491ba0ec-44f8-47c3-8eae-d588367cd7a1&fileName=Data Version.txt
- https://www.data.gov.uk/dataset/d36db06a-1d7d-4c34-b90a-308cb6a6f92b/reservoir-flood-extents-fluvial-contribution-national
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.