UK Flood Depth Grid at 20-Meter Resolution

A national modelled dataset showing flood depths on a 20x20 metre grid across the UK. It was created using a Digital Terrain Model and represents a 1 in 1000 annual chance fluvial flood scenario, with depths filtered to the 0-10 metre range. The data is provided by the Environment Agency and incorporates spatial data from multiple UK government and research organizations.

Use Cases

• Assess regional flood hazard exposure based on modelled depth grids.
• Compare relative flood depth severity between areas based on the 20-meter grid.
• Inform high-level planning and risk screening using the 1 in 1000 year flood scenario.

Strengths

• National coverage across the UK.
• Spatial resolution of 20x20 metres.
• Depth values are filtered to a defined 0-10 metre range.

Limitations

• The dataset is described as a national product that has not been quality assured.
• Description metadata is limited; actual data quality requires manual inspection after download.
• Row count and column-level documentation are absent.

Provenance

Source

Environment Agency, incorporating data from Centre for Ecology & Hydrology (NERC), Defra, Met Office, DARD Rivers Agency, Cranfield University, James Hutton Institute, and Ordnance Survey.

Collection Method

Modelled using a Digital Terrain Model re-sampled to 20 metres and a 1 in 1000 annual chance fluvial flood scenario.

Freshness

Last updated 2026-07-06 07:10:40.742380; freshness should be verified.

Geography

United Kingdom (national coverage).