Risk of Flooding from Surface Water Depth for a 1 Percent Annual Chance

Environment Agency data provides a GIS layer showing the maximum depth of flooding from surface water for a flood with a 1% annual probability. The flood depth is grouped into six bands, but the record has been retired and superseded by a newer version. The dataset is not suitable for property-level assessment and is based on digital spatial data licensed from several UK organizations.

Use Cases

• Regional flood hazard mapping based on maximum flood depth bands.
• Supporting studies for planning decisions based on indicative flood risk data.
• Visualizing surface water flood risk at a scale no more detailed than 1:10,000.

Strengths

• Data is produced by the UK Environment Agency, an authoritative source.
• Flood depth is categorized into six distinct bands for analysis.
• Dataset is part of a formal Risk of Flooding from Surface Water (RoFSW) mapping program.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• The record has been retired and superseded by a newer version.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

Environment Agency, UK

Collection Method

Likely produced via Risk of Flooding from Surface Water (RoFSW) mapping, incorporating licensed spatial data.

Freshness

Last updated 2026-07-06 07:17:18.310870; freshness should be verified.

Geography

United Kingdom