Braid and Main Network Contribution: High Surface Flow Areas in Northern Ireland

OpenDataNI's 'Braid and Main Network Contribution' dataset contains geospatial scores identifying areas of high surface water contribution to river networks in Northern Ireland. The scores were calculated within SAGA GIS using inputs from the CEH Land Cover 2007 map, Met Office average rainfall data, and a 5-meter Digital Terrain Model. The 'High contribution' category is defined as areas scoring above one standard deviation from the mean.

Use Cases

• Identifying high-risk surface runoff zones for flood mitigation planning based on land cover and rainfall inputs.
• Assessing landscape connectivity for river network health using derived contribution scores.
• Incorporating standardized hydrological layers into environmental dashboards for visualization.
• Supporting catchment area management strategies with geospatially modeled contribution data.

Strengths

• Derived from authoritative input sources: CEH Land Cover 2007, Met Office rainfall, and a 5m DTM.
• Methodology is explicitly described: scores calculated in SAGA GIS with a +1 standard deviation threshold for the 'High' category.
• Available under the permissive OGL-UK-3.0 license, facilitating reuse.
• Cross-platform presence (uk_data, eu_open_data) indicates recognized utility.

Limitations

• Core input land cover data is from 2007, which may not reflect current landscape conditions.
• Specific column names, row counts, and file sizes are not provided in any source, limiting precise technical assessment.
• Author and detailed creation methodology beyond the software used are not specified.

Provenance

Source

OpenDataNI

Collection Method

Exported from SciMAP application outputs within SAGA GIS, based on synthesized inputs from CEH, Met Office, and DTM data.

Time Range

null

Freshness

2026-04-15 14:20:17.491102

Geography

Northern Ireland, United Kingdom