dataset · Wales
Flood Storage Areas
Flood Storage Areas show those areas that act as a balancing reservoir, storage basin or balancing pond. Their purpose is to attenuate an incoming flood peak to a flow level that can be accepted by the downstream channel. It may also delay the timing of a flood peak so that its volume is discharged over a longer time interval. Flood Storage Areas that are not yet shown will be gradually added as information becomes available.
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Licence: ["There are no access restrictions on this data. NRW may release, publish or disseminate it freely.", "\u00a9 CNC/NRW. Data may be re-used under the terms of the Open Government Licence providing it i
Evidence quality: 51.6
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 storage area locations
- Coverage llm-inferred
- Wales
- Update frequency docs-verified
- asNeeded
- Formats docs-verified
- WMS
- Access docs-verified
- Free and open. No access restrictions; released freely by NRW. Open Government Licence v3.0 per ENTRY licence. No authentication.
Useful for
- Use cases llm-inferred
- Screening catchment flood attenuation storage for FRA baselines in Wales · Identifying existing balancing ponds and storage basins near drainage or SuDS design sites · Constraints mapping for development sites near flood storage areas
- Audience llm-inferred
- flood consultants · hydrologists · drainage engineers · GIS analysts · planners
Limitations
- Constraints docs-verified
- Not all flood storage areas are shown yet; more are added gradually as information becomes available
Evidence
- https://datamap.gov.wales/layers/inspire-nrw:NRW_FLOODMAP_FLOOD_STORAGE
- https://www.data.gov.uk/dataset/1fd2280b-9b06-4a30-89b2-df9e7c814b6f/flood-storage-areas34
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.