How Can Cities Respond to Flood Disaster Risks under Multi-Scenario Simulation? A Case Study of Xiamen, China

Area of Science:

• Urban planning
• Environmental science
• Disaster management

Background:

• Flood disasters significantly impact urban areas.
• Effective flood risk assessment is crucial for disaster prevention and mitigation.

Purpose of the Study:

• To construct an indicator system for flood disaster risk assessment.
• To evaluate flood risk under various precipitation scenarios.
• To provide a reference for urban flood disaster management.

Main Methods:

• Developed an indicator system incorporating hazard factors, environmental sensitivity, disaster vulnerability, prevention, and resilience.
• Integrated precipitation as a scenario parameter (annual average, multi-year flood season average, large typhoon).
• Applied the system to Xiamen as a case study.

Main Results:

• Flood risk in Xiamen shows high variability under typhoon precipitation.
• Xiamen's drainage and flood control capacity is insufficient, with high risk in older urban areas.
• Key flood-prone areas include underpasses, underground spaces, and urban villages.
• Northern mountainous regions of Xiamen face the highest flood risk.

Conclusions:

• The study delineates urban flood control zones based on risk assessment.
• Countermeasures are proposed to address identified flood risks.
• The research contributes to flood disaster risk assessment methodologies and urban planning.