England Flood Depth Model for 1% Annual Chance, NT Grid Reference 2004

England's modelled fluvial flood depth data for the 1% annual chance of flooding was produced in 2004 using the JFlow hydrodynamic model on a 5x5m grid. The Environment Agency created this data as part of a generalised modelling project to fill gaps in detailed local data for spatial planning flood zones. This specific dataset covers the 100x100km Ordnance Survey National Grid reference NT.

Use Cases

• Assessing broad catchment flood risk based on modelled flood depth data.
• Supporting spatial planning decisions for flood zone extents based on generalised modelling.
• Providing baseline data for Shoreline Management Plan scale analysis based on hydrodynamic model outputs.
• Identifying areas where detailed local flood modelling may be required based on generalised data gaps.

Strengths

• Modeled on a 5x5m grid resolution.
• Created using a two-dimensional hydrodynamic model (JFlow).
• Covers a specific 100x100km Ordnance Survey grid reference (NT).

Limitations

• Data is from 2004 and has not been updated; many areas have since been replaced by more accurate local detailed modelling.
• Not suitable for identifying individual property flooding, detailed decision-making, or site-specific Flood Risk Assessments.
• 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

England, specifically the Ordnance Survey National Grid reference NT (100x100km square).