Understanding the NEEDS for ACTING: An integrated framework for applying nature-based solutions in Brazil

Area of Science:

• Environmental Science
• Urban Planning
• Ecology

Background:

• Nature-based solutions (NBS) are increasingly recommended for ecosystem protection and restoration.
• Operationalizing NBS, particularly in developing countries, remains a challenge with limited studies on their full potential.
• Flood risk mitigation requires integrated approaches considering societal vulnerabilities.

Purpose of the Study:

• To develop an integrated framework with spatial and participatory tools for analyzing flood risk mitigation using NBS in Brazil.
• To understand societal challenges and vulnerabilities for effective NBS planning.
• To assess the multiple benefits of various NBS alternatives.

Main Methods:

• Development of an integrated framework incorporating spatial and participatory tools.
• Engagement of 255 stakeholders in Campina Grande municipality.
• Analysis of flood-prone areas, hazard, vulnerability, and exposure hotspots.
• Evaluation of seven NBS alternatives across 53 application scenarios.

Main Results:

• Identification of flood-prone areas, with an projected 52% increase in future flooding.
• Detailed mapping of hazard, vulnerability, and exposure hotspots with four case studies.
• Analysis of multiple benefits from seven NBS alternatives, with combined NBS showing higher reduction rates.
• Demonstration of NBS effectiveness in reducing vulnerabilities and increasing resilience.

Conclusions:

• Spatially assessing 'needs' and 'multiple benefits' is crucial for effective NBS implementation.
• Integrated frameworks with participatory tools enhance flood risk mitigation strategies.
• NBS offer significant potential for environmental and societal benefits, particularly in reducing vulnerabilities and enhancing resilience.