Investing In Sustainable, Inclusive, And Resilient Green Infrastructure

In rapidly growing urban areas of developing countries, the allocation of green zones often lacks scientific rigour, leading to fragmented landscapes and compromised permeability that contributes to flash flooding during heavy rainfall. Sealed urban surfaces exacerbate urban flooding, droughts, and heat island effects as extreme weather events become more common in the Anthropocene age. A standardised approach is crucial to maximise the benefits of nature-based solutions in space-constrained cities. This approach should utilise street networks and stream channels to identify green zones strategically. These zones must prioritise NBS implementation to restore water flow regimes and mitigate urban environmental challenges. A policy brief for G20 members proposes using street networks and stream channels as placeholders for green zone identification. These zones should be situated to provide ecosystem services alongside active community engagement for inclusivity in urban development. Overlaying land use maps with surface run-off data can assess the suitability of potential NBS within these zones. Implementing such a standardised approach can enhance sustainable climate action in urban planning, promoting resilient green infrastructure, and mitigating the adverse effects of urbanisation on natural ecosystems. This integrated strategy aligns with global efforts to address climate change and fosters collaborative solutions among G20 nations.