Flood Defence Structures in Wales with Asset Types and Locations

Three open datasets from the National Flood Asset Database record flood infrastructure in Wales managed by Lead Local Flood Authorities and Natural Resources Wales. The data includes linear flood defence locations, indicative culvert polylines, and culvert opening points, with attributes such as type, length, maintainer, and ID. Information for Flintshire and Newport local authorities is currently unavailable, and data is updated regularly when improved information becomes available.

Use Cases

• Mapping flood defence asset networks based on linear alignment and type data.
• Assessing infrastructure coverage and gaps for flood risk management based on the described asset locations.
• Identifying responsible maintainers for specific flood defence structures based on the owner and maintainer attributes.
• Visualizing the indicative location of underground culverts and screens for general guidance and planning.

Strengths

• Includes three distinct datasets covering linear defences, culverts, and culvert openings.
• Attributes for assets include type, length, maintainer, and a unique ID.
• Data is linked to official planning and risk assessment tools like Flood Risk Assessment Wales (FRAW) and Flood Map for Planning (FMfP).

Limitations

• Culvert and screen locations are described as indicative and may not be accurate, complete, or up to date.
• Data for two local authorities (Flintshire and Newport) is explicitly stated as unavailable.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

National Flood Asset Database, managed by Lead Local Flood Authorities (LLFAs) and Natural Resources Wales (NRW).

Collection Method

Records of constructed flood infrastructure.

Time Range

null

Freshness

Updated regularly when new and improved data becomes available, but last update date is unknown.

Geography

Wales, excluding Flintshire and Newport.