Lagan Network Contribution: High Surface Flow Areas in Northern Ireland

Lagan Network Contribution data contains geospatial scores identifying areas of high contribution to surface water flow networks in Northern Ireland. The scores were derived using the SciMAP application within SAGA GIS, based on inputs from CEH Land Cover 2007, Met Office average rainfall, and a 5-meter Digital Terrain Model. The 'High contribution' category boundary is defined as areas scoring above +1 standard deviation of the score distribution.

Use Cases

• Identifying high-risk flood source areas based on land cover, rainfall, and topography.
• Visualizing surface water connectivity for environmental impact assessments in web maps.
• Integrating hydrological contribution scores into regional water management dashboards.
• Analyzing the relationship between land use from 2007 and potential surface flow contributions.

Strengths

• Derived from established, authoritative input sources: CEH Land Cover 2007, Met Office rainfall data, and a 5-meter DTM.
• Cross-platform presence on eu_open_data and uk_data suggests recognized utility and stability.
• Explicitly defined methodology using the SciMAP application and a +1 standard deviation threshold for classification.

Limitations

• No column names or schema details are provided, limiting understanding of the data structure.
• Primary land cover input is from 2007, which may not reflect current conditions.
• Conflicting 'last updated' dates (2026-07-08 and 2026-07-02) suggest potential metadata inconsistency.

Provenance

Source

Government Digital Service (via eu_open_data), outputs from SciMAP/SAGA GIS analysis.

Collection Method

Scores exported from SciMAP application outputs within SAGA GIS, based on synthesis of land cover, rainfall, and topographic data.

Time Range

Analysis likely reflects conditions circa 2007, based on the CEH Land Cover input.

Freshness

Last updated dates conflict between 2026-07-08 and 2026-07-02; the land cover input data is from 2007.

Geography

Northern Ireland, United Kingdom.