Our role was to build an accessible mapping platform to pinpoint pollution hotspots and highlight where nature-based solutions could be introduced. We began by analysing traffic density, watercourses, and speed data to predict areas of high runoff risk. This revealed 250 hotspots across the region (locations where SuDS could have the greatest impact).
From there, we developed a SuDS Opportunity Index using a Multi-Criteria Decision Analysis approach. Each land parcel was assessed against eleven factors, including land ownership, topography, tree cover, public transport infrastructure and land use, helping to determine the feasibility of installing SuDS or green infrastructure.
The final tool brought these datasets together in an interactive web map, supported by a FieldMap data-capture tool that allowed partners to record observations during site visits. This meant the map could evolve over time as new information was gathered. Working alongside City of Trees and Mersey Forest, we used the tool to guide collaborative site investigations, combining satellite imagery, field data and local insight to explore opportunities on the ground.
The project has strengthened decision-making by giving GMCA and its partners a clear way to prioritise action, target investment and plan SuDS interventions where they will have the most environmental benefit. It also showcased innovation in digital environmental management, earning a shortlist place in the 2024 Brownfield Awards. As GMCA noted, the tool will help Greater Manchester build climate resilience and manage water more sustainably for years to come.
