dataset · England
Climate change allowances - peak rainfall by management catchment
This dataset contains peak rainfall allowances showing the anticipated changes to peak rainfall by management catchment. It contains information generated by Met Office Hadley Centre The Environment Agency provides peak rainfall allowances in the advice it gives for flood risk assessments and strategic flood risk assessments (https://www.gov.uk/guidance/flood-risk-assessments-climate-change-allowances) and for risk management authorities when claiming Flood & Coastal Erosion Risk Management Gran
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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
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 rainfall allowances · anticipated changes to peak rainfall by management catchment
- Coverage docs-verified
- England (ENTRY regions); docs extent lat 49.943 to 55.816, lon -6.236 to 2.072 · 2050s epoch (2040-2059) and 2070s epoch (2060-2080)
- Resolution llm-inferred
- Management catchment level; two future time-slice epochs (2050s, 2070s); no finer spatial or temporal resolution stated
- Update frequency docs-verified
- Irregular
- Formats docs-verified
- OGC API - Features · WFS · WMS · GeoPackage · Shapefile · GeoJSON · File Geodatabase · TXT · LYR
- Access docs-verified
- Free/open, no authentication; Open Government Licence
Useful for
- Use cases llm-inferred
- FRA and strategic flood risk assessment: applying climate change peak rainfall allowances by management catchment for 2050s and 2070s · Drainage strategy: climate-adjusted peak rainfall inputs for design storms in England · FCERM Grant-in-Aid project or scheme business cases: catchment-level climate allowance evidence
- Audience llm-inferred
- flood risk consultants · drainage engineers · hydrologists · GIS analysts · planners
Limitations
- Constraints llm-inferred
- Only two future time-frames (2050s and 2070s) are provided · Only central (50th percentile) and upper end (95th percentile) allowances are described · Update frequency is irregular, so the data may not reflect the latest guidance · Extent covers a bounding box wider than England, so coverage outside England should be checked · Rainfall allowances only, not river flow allowances
Evidence
- https://environment.data.gov.uk/api/file/download?fileDataSetId=a7ef8fe7-d9e1-4796-991d-a5a26fed37b4&fileName=CCA_Peak_Rainfall.lyr
- https://www.data.gov.uk/dataset/ed24d1c3-4d84-483d-a17e-7ac90180307c/climate-change-allowances-peak-rainfall-by-management-catchment
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.