Modeling the Impacts of Urban Flood Risk Management on Social Inequality

Area of Science:

• Urban planning and development
• Disaster risk reduction
• Socio-hydrology

Background:

• Urban populations face heterogeneous flood exposure, disproportionately affecting the poor.
• Rapid urbanization in developing countries highlights disparities between planned and informal settlements, often on flood-prone land.
• Managing flood risk in informal settlements is complex and can worsen social inequalities.

Purpose of the Study:

• To adapt a socio-hydrological model for stratified urban societies (planned vs. informal settlements).
• To explore the relationship between flood risk management and social inequality.
• To identify key factors influencing flood risk management outcomes in diverse urban settings.

Main Methods:

• Adaptation of an existing socio-hydrological model to include planned and informal settlements.
• Construction of four system archetypes based on risk reduction and disaster recovery scenarios.
• Sensitivity analysis of vulnerability, risk aversion, and flood awareness in flood risk management.

Main Results:

• Reducing vulnerability in informal communities significantly decreases social inequality and supports economic growth, even with high flood exposure.
• Increased risk aversion can negatively impact informal communities by hindering economic growth.
• Flood risk management strategies must consider the specific dynamics of informal settlements.

Conclusions:

• Pro-poor urban governance and planning are crucial for effective flood risk management.
• Recognizing the permanence of informal communities is vital for sustainable urban development and disaster resilience.
• Integrated approaches are needed to address flood risk and social inequality in rapidly urbanizing areas.