2004 Fluvial Flood Depth Climate Change Difference Grid for England

A 5x5 meter grid dataset from 2004 shows the difference in modelled fluvial flood depth under a 20% increase in peak flows, representing a climate change scenario. It was produced using the JFlow hydrodynamic model as part of a generalised modelling project to define Flood Zones for spatial planning across England. The data covers specific 100x100km Ordnance Survey grid squares (SK, SS, SW, SZ) and is intended for broad-scale analysis, not site-specific property assessments.

Use Cases

• Assessing potential changes in flood inundation extent for spatial planning based on a 2004 climate change scenario.
• Comparing baseline and climate-adjusted flood depths for regional environmental impact studies using the 5x5m grid.
• Identifying areas where generalized 2004 modelling data suggests increased flood risk due to a 20% peak flow increase.

Strengths

• Provides a high-resolution 5x5 meter grid for detailed geospatial analysis.
• Based on a specific, documented climate change scenario (20% increase in peak flows) modelled with the JFlow hydrodynamic model.
• Covers multiple 100x100km grid squares across England, offering regional coverage.

Limitations

• The dataset is from 2004 and has not been updated, and climate change allowances have since changed.
• Metadata for size, row count, license, and specific column names is consistently missing across all platform entries.
• Explicitly not suitable for property-level assessment or detailed decision-making, limiting its application.

Provenance

Source

Environment Agency (UK), produced as part of the Approval for Access product AfA480.

Collection Method

Generated as a by-product of the 2004 generalised modelling project using the two-dimensional JFlow hydrodynamic model.

Time Range

2004

Freshness

Last updated metadata dates range from 2026-07-06, but the underlying data is from 2004.

Geography

Specific 100x100km Ordnance Survey National Grid squares (SK, SS, SW, SZ) within England.