Modelled Fluvial Flood Depth Data for England, 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 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 NY, with similar data available for the whole of England.

Use Cases

• Define flood zone extents for spatial planning based on modelled flood depth.
• Assess broad catchment-scale flood risk based on 0.1% annual chance scenarios.
• Support shoreline management plan development using generalised flood depth data.

Strengths

• Data modelled on a 5x5m grid resolution.
• Created for the 0.1% annual chance of flooding event.
• Produced using a two-dimensional hydrodynamic model (JFlow).

Limitations

• Data is from 2004 and has not been updated.
• Not suitable for identifying whether an individual property will flood or for detailed decision making.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

Environment Agency

Collection Method

Created using the JFlow two-dimensional hydrodynamic model.

Time Range

2004

Geography

Ordnance Survey National Grid reference NY (England)