Coastal Design Extreme Sea Levels for Wales with Surge and Gauge Data

A GIS dataset providing extreme sea level values for a range of return periods and typical surge information around the Welsh coastline under present-day conditions. It includes layers for confidence intervals, estuary boundaries, surge shape locations, and tide gauge stations. The dataset is produced by the Government Digital Service and is intended to inform coastal flood modelling, scheme design, and strategic planning.

Use Cases

• Coastal flood modelling based on extreme sea level values for various return periods.
• Scheme design for coastal defenses based on surge shape and tide gauge location data.
• Strategic planning and flood risk assessments based on estuary boundary and confidence interval layers.

Strengths

• Contains multiple specialized GIS layers, including extreme sea levels, confidence intervals, and estuary boundaries.
• Designed for practical application in coastal engineering and flood risk management.
• Geographically focused on the coastline of Wales, providing localized information.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count, file formats, and last update date are unknown, limiting suitability assessment.
• Data may reflect geographic bias inherent to its focus on Wales.

Provenance

Source

Government Digital Service

Collection Method

Likely derived from coastal monitoring and modelling efforts.

Time Range

Present-day conditions.

Freshness

Last update date is unknown; freshness unverified.

Geography

Coastline of Wales.