England Flood Depth Model for 0.1% Annual Chance, SY Grid Reference 2004

Modelled fluvial flood depth data was created for the 0.1% annual chance of flooding situations as a by-product from the 2004 generalised modelling project. The Environment Agency produced this data on a 5x5m grid using the JFlow hydrodynamic model to fill gaps where no detailed local modelled data existed. This dataset covers the 100x100km Ordnance Survey National Grid reference SY area within England.

Use Cases

• Define historical flood zone extents for spatial planning based on the 2004 generalised modelling project.
• Analyze broad catchment-scale flood risk based on modelled fluvial flood depth data.
• Support Shoreline Management Plan scale assessments based on the 5x5m grid depth data.

Strengths

• Data is modelled on a 5x5m grid, providing a specific spatial resolution.
• Covers a defined 100x100km Ordnance Survey National Grid reference SY area.
• Created using a named two-dimensional hydrodynamic model (JFlow).

Limitations

• The dataset has not been updated since 2004 and may be superseded by local detailed modelling.
• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

Environment Agency

Collection Method

Modelled using the JFlow two-dimensional hydrodynamic model.

Time Range

2004

Geography

Ordnance Survey National Grid reference SY area within England.