A transdisciplinary multiscaled approach to engage with green infrastructure planning, restoration and use in sub-Saharan Africa

The systematic integration of green infrastructure (GI) concepts in urban planning shows promise to reduce environmental hazards; while creating sociocultural benefits. However, cities in sub-Saharan Africa face rapid urbanisation and are challenged by the degradation of existing GI, increasing their vulnerability to climatic risks. This paper presents the findings of a transdisciplinary research project that investigated GI planning in the City of Tshwane, South Africa, over two years. The researchers conducted a community survey, an on-the-ground rapid assessment of multifunctional benefit provisions, first-hand observations of local stormwater systems, reviewed policy documents and conducted semi-structured interviews with metro officials. To integrate the above findings, four design studios and eight co-creation workshops were held that explored GI spatial planning in the city. The researchers examined the uptake of GI planning principles, and the challenges, opportunities and local proposals for GI applications, and here synthesised some main conclusions. Despite many well-known challenges, GI opportunities include creating socioeconomic incentives for stronger human-nature relations, providing for multifunctional benefits and anchoring GI in local communities. Interactive research can facilitate increased local awareness and engagement, but access to GI benefits is physically constrained and socially determined by knowledge, networks and safety factors. Based on the above findings, the researchers propose locally adapted planning strategies to enhance GI: creating opportunities for GI access and co-ownership, encouraging multifunctional, safe and flexible GI, supporting multiscale GI integration, and strengthening collaborative governance. A joint GI vision can reinforce city ownership along with flexible and creative design alternatives that are rooted in local communities.