Surface Water Flood Maps with Velocity and Climate Change Projections

Surface water flood hazard maps from the UK Government Digital Service show flood extent, depth, and velocity for three probability scenarios. The maps include a high probability 10-year return period, a medium 200-year return period, and a low probability scenario combining the 200-year period with a UKCP09 high emissions climate projection for the 2080s. Velocity data is presented in one of four bands where modeling confidence permits.

Use Cases

• Assess flood risk for property development based on mapped flood extent and depth.
• Model potential flood damage using velocity bands where available.
• Plan climate adaptation strategies using the 2080s high emissions scenario projections.
• Compare flood hazard probabilities (10-year vs. 200-year return periods) for risk communication.

Strengths

• Includes three distinct probability scenarios for comparative analysis.
• Integrates a specific climate change projection (UKCP09 high emissions 2080s) for long-term planning.
• Maps multiple hazard dimensions: extent, depth, and velocity.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and file size are unknown, which may limit suitability assessment.
• Last update date is unknown; freshness unverified.

Provenance

Source

Government Digital Service

Collection Method

Flood modeling based on UKCP09 climate projections and return period analysis.

Time Range

Climate projections for the 2080s.

Freshness

null

Geography

Likely United Kingdom, inferred from use of UKCP09 and Scottish Planning Policy.