dataset · England
Climate Change Allowances - Peak River Flow by Management Catchment
This dataset contains peak river flow allowances showing the anticipated changes to peak flow by management catchment. It contains information generated by UK Centre for Ecology and Hydrology using UK Climate projections. The Environment Agency uses peak river flow allowances as benchmarks for the advice it gives as a statutory consultee for flood risk assessments and strategic flood risk assessments (https://www.gov.uk/guidance/flood-risk-assessments-climate-change-allowances). The Environment
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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
- peak river flow allowances by management catchment · anticipated changes to peak flow for the 2020's, 2050's and 2080's epochs · central, higher central and upper end peak flow allowances (50th, 70th and 95th percentiles)
- Coverage docs-verified
- Bounding box 49.943° to 55.816° N, 6.236° W to 2.072° E; catalogue region England · Epochs 2015 to 2125: 2020's (2015-2039), 2050's (2040-2069), 2080's (2070-2125)
- Resolution docs-verified
- Per management catchment; no cell size or pixel resolution stated
- Update frequency docs-verified
- Irregular
- Formats docs-verified
- OGC API - Features · WFS · WMS · Shapefile (zip) · GeoPackage (zip) · GeoJSON (zip) · File Geodatabase (zip) · ArcGIS layer file (.lyr) · TXT
- Access docs-verified
- Free, open access; Open Government Licence
Useful for
- Use cases llm-inferred
- FRA climate-change uplift of peak flows using the 2050's and 2080's epochs for a catchment in England · FCERM grant-in-aid project benchmarking against Environment Agency peak flow allowances by management catchment · GIS overlay of catchment-level peak flow allowances on a site's management catchment for drainage or flood-risk sensitivity tests
- Audience llm-inferred
- flood risk consultants · hydrologists · drainage engineers · GIS analysts
Limitations
- Constraints docs-verified
- Updated irregularly · Dataset reference date is 2020-12-09 while the page shows an update on 18 September 2026 · Provides peak flow allowances only, not gauged flow records or time series · Allowances are benchmarks for advice and are not design flows in themselves · Catalogue region is England only
Evidence
- https://environment.data.gov.uk/api/file/download?fileDataSetId=1f23ea8f-6b72-48cc-acec-153c1bba9177&fileName=CCA_Peak_River_Flows.lyr
- https://www.data.gov.uk/dataset/5d9c75a9-4554-455c-96ff-8fd814c317dd/climate-change-allowances-peak-river-flow-by-management-catchment
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.