How can green infrastructure be mapped using GIS to support sustainability and risk reduction?

• A. Map natural features, blue-green corridors, rainfall capture, drainage, and flood attenuation capacity to identify priority locations for nature-based solutions.
• B. Map only urban land use with no environmental features.
• C. Replace all gray infrastructure with green infrastructure automatically.
• D. Focus solely on property tax assessments.

Answer: (A)

Mapping green infrastructure with GIS centers on bringing together natural features and built environment data to plan nature-based solutions that reduce risk and boost sustainability. By including natural features, blue-green corridors, rainfall capture potential, drainage patterns, and flood attenuation capacity, you can see where green interventions will have the biggest impact and how they connect with existing networks. This makes it possible to prioritize sites for bioswales, green roofs, permeable pavements, urban wetlands, and parks, and to design them in a way that maximizes flood risk reduction, heat mitigation, water quality, and biodiversity benefits. GIS lets you combine hydrological and ecological information, run scenarios, and map outcomes, so decision-makers can choose the most effective locations and configurations for green infrastructure.

Other options fall short because they omit essential environmental and hydrological context needed for planning nature-based solutions. Focusing only on urban land use ignores the environmental features and flood dynamics that green infrastructure relies on. Replacing all gray infrastructure automatically is neither realistic nor desirable without careful analysis of costs, landscapes, and performance. Focusing solely on property tax assessments misses sustainability and risk factors that drive resilience and long-term value.