The Affordability of Flood Risk Property-Level Adaptation Measures

Area of Science:

• Environmental Science
• Economics
• Social Science

Background:

• Integrated flood risk management necessitates individual adaptation.
• Affordability and social justice are critical but under-discussed aspects of flood risk management.
• Property-level adaptation measures are increasingly expected of flood-prone residents.

Purpose of the Study:

• To investigate the potential unaffordability of property-level flood adaptation measures across Europe.
• To analyze affordability using investment and payment concepts with defined thresholds.
• To link affordability to social justice and fairness concerns in flood risk management.

Main Methods:

• Utilized two definitions of affordability (investment and payment).
• Applied two distinct affordability thresholds based on residual income and expenditure.
• Examined affordability rates for property-level adaptation measures across Europe.

Main Results:

• A significant proportion of European property owners cannot afford one-time payments for protective measures.
• Affordability can be improved through installment payment mechanisms or cost-spreading financial tools.
• Findings highlight a gap between adaptation obligations and financial capacity for many residents.

Conclusions:

• The current affordability of flood adaptation measures is a major concern for a large part of Europe.
• Financing mechanisms that spread costs over time are essential to ensure social accessibility.
• Future flood risk management strategies must integrate socially accessible financing to support resident adaptation.