UK Estuary Flood Boundary Markers for 2018 Design Sea Levels

Coastal Flood Boundary Estuary Boundaries is a GIS polyline dataset marking the upstream extent for applying 2018 design and extreme sea level data across the UK coastline. The dataset was produced by the UK Coastal Flood Forecasting partnership, including the Environment Agency, SEPA, NRW, and DfINI. It supports present-day coastal flood modelling and planning, excluding future climate change impacts.

Use Cases

• Delineating valid application zones for estuary sea level data using the provided polyline markers to prevent upstream misuse.
• Integrating estuary boundary polylines with other Coastal Design Sea Levels datasets for comprehensive flood inundation modeling.
• Supporting strategic flood risk assessments by defining the geographic scope where 2018 extreme sea level and surge information is applicable.

Strengths

• Covers the entire UK coastline, including England, Wales, Scotland, Northern Ireland, Isle of Man, and Jersey.
• Developed in partnership by multiple national environmental agencies (EA, SEPA, NRW, DfINI).

Limitations

• Data reflects present-day conditions for 2018 and does not account for future sea level rise or other climate change effects.
• The specific row count and spatial resolution of the polyline features are not provided.

Provenance

Source

Environment Agency (UK), in partnership with SEPA, NRW, and DfINI.

Collection Method

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Time Range

Present-day conditions for 2018.

Freshness

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Geography

Coastline of the UK, including England, Wales, Scotland, Northern Ireland, Isle of Man, and Jersey.