Ballinderry Network Contribution: High Surface Water Flow Areas

Network contribution area scores were exported from the SciMAP application outputs within SAGA GIS. The scores were based on inputs from CEH Land cover 2007, Met Office average rainfall and a 5 meter Digital Terrain Model. The High contribution category boundary was determined by selecting +1 standard deviation of the distribution of the scores, identifying areas with above-average potential for surface water flow into river networks.

Use Cases

• Identifying high-risk areas for surface runoff and potential flooding based on land cover, rainfall, and terrain scores.
• Visualizing water connectivity patterns for environmental dashboards and web maps.
• Informing land-use planning decisions to mitigate hydrological impacts using the derived high-contribution boundary.
• Integrating with other geospatial layers for catchment-scale analysis.

Strengths

• Derived from established input sources: CEH Land Cover 2007, Met Office rainfall data, and a 5m DTM.
• Methodologically defined high-contribution boundary using a statistical threshold (+1 standard deviation).
• Available under the permissive OGL-UK-3.0 license for reuse.

Limitations

• Input land cover data is from 2007, which may not reflect current conditions.
• Column names and specific data schema are not provided in any source description.
• Conflicting 'last updated' dates (2026-07 08 and 2026-07-02) suggest potential metadata inconsistency.

Provenance

Source

OpenDataNI, derived from SciMAP application outputs within SAGA GIS.

Collection Method

Scores calculated based on CEH Land Cover 2007, Met Office average rainfall, and a 5 meter Digital Terrain Model.

Time Range

Primary input data (land cover) is from 2007.

Freshness

Last updated metadata indicates 2026-07-08, but the core input data (land cover) is from 2007.

Geography

Northern Ireland, specifically the Ballinderry area.