Blue-green infrastructure (BGI) to reduce compound flooding in a climate crisis scenario in Recife-PE

Abstract

Objective – Investigate blue-green infrastructure as an adaptation strategy to reduce the compound flooding impacts in Recife-PE, considering the climate change context, also identifying the main challenges and opportunities for its effective implementation in the region.

Methodology – Theoretical-analytical research, of an exploratory and descriptive nature, based on a bibliographic review and comparative analysis of national and international experiences applicable to the context of Recife in the face of the scenario of climate change and compound floods.

Originality/Relevance – The work stands out for addressing blue-green infrastructure as a solution to compound flooding, a topic still largely unexplored in Brazil. Unlike studies that address only rainfall flooding or sea level rise in isolation, this research integrates both phenomena within the urban context of Recife. Thus, it broadens the scientific debate on climate adaptation in coastal areas, providing relevant theoretical insights for the formulation of public policies and sustainable planning strategies.

Results – The research demonstrated that blue-green infrastructure is an effective strategy to reduce the effects of compound flooding in Recife, combining hydraulic and ecological functions. The territorial analysis identified specific solutions for vulnerable neighbourhoods, such as flood parks in Iputinga, bioswales in Tejipió, and rain gardens in Torrões. In addition to reducing hydrological risks, social and environmental co-benefits stand out, such as public health, leisure, and biodiversity. However, technical, financial, and institutional challenges were identified that require integrated governance and innovative implementation mechanisms.

Theoretical/Methodological Contributions – The study expands understanding of the relationship between compound flooding and blue-green infrastructure, bringing new perspectives to the literature on urban adaptation. It proposes an analysis map that can be applied in various coastal cities, contributing to the development of sustainable urban planning strategies and informing the decision-making process of stakeholders.

Social and Environmental Contributions – The contributions encompass the potential to strengthen urban resilience, improve public health, and create inclusive spaces for leisure and social interaction. From an environmental perspective, the highlights include expanding biodiversity, enhancing urban ecosystems, and adapting to the adverse effects of climate change, given that the proposal fosters urban resilience.