Abstract

Cities have recently experienced more frequent and intense flooding that poses far-reaching implications on humans in terms of its negative effect on the quality of urban life, urban efficiency, economy, infrastructure, and sustainability. Flood vulnerability mapping based on multiple factors that influence flooding is considered a widely used approach to understand and analyse the extent of risk. With this background, the study examined flood vulnerability in Lagos core using multicriteria decision approach (MCDA) on ArcMap 10.5. Evidence from the current study indicates that the Lagos core is acutely vulnerable to flood threats as 95.62% of the total area is highly vulnerable to flooding. The study suggests the need for proactive flood vulnerability management actions rather than reactive measures to minimise the impact.

Key Words: Flood, Lagos, Multi-Criteria Decision Analysis, GIS