Flood Depth Model for England, 2004 Generalized Grid SP

Modelled fluvial flood depth data for England was produced in 2004 using the JFlow hydrodynamic model on a 5x5m grid. The Environment Agency created this dataset to define flood zone extents for spatial planning where no detailed local data existed. The data covers the 100x100km Ordnance Survey National Grid reference SP and represents scenarios with a 1% annual chance of flooding.

Use Cases

• Assessing broad catchment flood risk based on modelled flood depth data.
• Supporting spatial planning decisions based on generalized flood zone extents.
• Comparing flood depth scenarios for a 1% annual chance event.
• Providing a baseline for shoreline management plans based on hydrodynamic model outputs.

Strengths

• Data is modelled on a high-resolution 5x5m grid.
• Covers a specific 100x100km national grid reference (SP) for England.
• Created using a two-dimensional hydrodynamic model (JFlow).

Limitations

• Dataset has not been updated since its creation in 2004.
• Not suitable for identifying individual property flooding or detailed site-specific assessments.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

Environment Agency, Centre for Ecology & Hydrology, Ordnance Survey, and other UK government bodies.

Collection Method

Created using the JFlow two-dimensional hydrodynamic model as part of a generalized modeling project.

Time Range

2004

Geography

England, specifically the Ordnance Survey National Grid reference SP.