Flood Depth Grids for England, 2004 Generalised Modelling

Modelled fluvial flood depth data was created for the 1% annual chance of flooding situations as a by-product from the 2004 generalised modelling project. The Environment Agency produced this data using the JFlow hydrodynamic model on a 5x5m grid to fill gaps where no detailed local modelled data existed. This dataset covers the Ordnance Survey National Grid reference SK, representing a 100x100km square area.

Use Cases

• Assessing broad catchment-scale flood risk based on modelled flood depth grids.
• Supporting Shoreline Management Plan development based on generalised flood extents.
• Historical comparison of flood zones where detailed local modelling was unavailable in 2004.

Strengths

• Data modelled on a 5x5m grid resolution.
• Covers a defined 100x100km grid reference (SK).

Limitations

• Data is from 2004 and has not been updated.
• Not suitable for identifying flooding at individual properties or for detailed site-specific assessments.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

Environment Agency

Collection Method

Generated using a two-dimensional hydrodynamic model (JFlow).

Time Range

2004

Geography

Ordnance Survey National Grid reference SK (100x100km square) in England.