Derg And Mourne 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.
• Prioritizing locations for natural flood management interventions using network contribution scores.
• Visualizing hydrological connectivity for environmental impact assessments in the Derg and Mourne catchments.
• Incorporating standardized contribution scores into regional water resource dashboards.

Strengths

• Derived from specific, named foundational datasets: CEH Land Cover 2007, Met Office average rainfall, and a 5-meter DTM.
• Methodology is explicitly described: scores calculated in SAGA GIS's SciMAP application with a +1 standard deviation threshold for the 'High contribution' class.
• Available on multiple open data platforms (uk_data, eu_open_data), indicating established use and official provenance.
• Data is explicitly stated to be downloadable and usable for web map visualization and dashboard analysis.

Limitations

• Critical metadata is missing: no column names, row counts, or file sizes are provided, hindering detailed understanding of the data structure.
• The primary input land cover data (CEH 2007) is potentially outdated, limiting the analysis's current applicability.
• Conflicting license identifiers are present (OGL-UK-3.0 and a URL for the same license), though they likely refer to the same Open Government Licence.

Provenance

Source

OpenDataNI (Organization listed on uk_data platform).

Collection Method

Scores exported from the SciMAP application within SAGA GIS, based on analysis of land cover, rainfall, and terrain data.

Time Range

Analysis is anchored to the CEH Land Cover 2007 dataset, suggesting a 2007 reference point for land use.

Freshness

Last updated on uk_data platform: 2026-07-08 (future date, likely a system error). No update dates provided on eu_open_data.

Geography

Northern Ireland, specifically the Derg and Mourne catchments.