England Flood Depth Grids from 2004 Generalised Modelling

England-wide modelled fluvial flood depth data for a 1% annual chance of flooding, produced in 2004 using the JFlow hydrodynamic model on a 5x5m grid. The dataset was created by the Environment Agency as part of a generalised modelling project to fill gaps in detailed local data for spatial planning flood zone definitions. This specific file covers the Ordnance Survey National Grid reference SE.

Use Cases

• Assessing broad-scale flood risk for spatial planning based on modelled flood depth extents.
• Comparing generalised flood zones with later detailed local models based on the 2004 baseline data.
• Supporting catchment-scale flood management studies based on the 5x5m grid resolution.

Strengths

• Data covers the whole of England, providing national scope.
• Modeled on a 5x5m grid, offering a specific spatial resolution.
• Created using a named hydrodynamic model (JFlow), indicating a defined methodology.

Limitations

• The dataset has not been updated since 2004, and may be superseded by more recent local models.
• Metadata completeness is limited; column-level documentation is absent.
• The description explicitly states the data is not suitable for identifying whether an individual property will flood or for detailed decision making.

Provenance

Source

Environment Agency

Collection Method

Created using the JFlow two-dimensional hydrodynamic model.

Time Range

2004

Geography

England (specific file for Ordnance Survey grid reference SE)