Coastal Flood Maps: UK Hazard Extents for 10, 200, and 1000-Year Return Periods

Three coastal flood probability maps for the United Kingdom, covering high (10-year), medium (200-year), and low (1000-year) return periods. The low probability scenario also includes a climate change projection using the UKCP09 high emissions scenario for the 2080s. The dataset, provided by the Government Digital Service, shows flood extent and depth where available.

Use Cases

• Risk assessment for coastal infrastructure based on flood extent and depth maps
• Long-term land-use planning based on 200-year and 1000-year return period scenarios
• Climate adaptation modeling based on the UKCP09 2080s high emissions projection
• Validation of flood models against observed high-probability events mentioned in the description

Strengths

• Includes three distinct probability scenarios (10, 200, and 1000-year return periods) for hazard comparison
• Integrates a specific future climate scenario using the UKCP09 high emissions 95%ile predictions for the 2080s
• Maps show both flood extent and depth where appropriate, providing two key hazard metrics

Limitations

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

Provenance

Source

Government Digital Service

Collection Method

Modeled flood hazard mapping, likely based on hydrological and topographical data.

Time Range

Climate change scenario is based on projections for the 2080s.

Freshness

Last updated date is unknown.

Geography

United Kingdom (implied by reference to Scottish Planning Policy and UKCP09)