Metadata last updated on Nov 24, 2025

Comprehensive high-resolution (1m) probabilistic flood hazard maps for Freetown, Sierra Leone, covering both river (fluvial) and surface water (pluvial) flooding across six return periods (20, 50, 100, 200, 500, and 1,500 years). These undefended maps show flood depth and extent from riverine overflow and rainfall-driven surface water accumulation using JBA's hydraulic modeling software (JFlow 2D and RFlow 1D for river flooding; JFlow 2D for surface water flooding). The maps have been enhanced from 30m to 1m resolution using advanced water filling algorithms applied to high-resolution Digital Elevation Models. This dataset provides a complete picture of flood risk in Freetown from multiple sources, essential for comprehensive disaster risk management, urban planning, and climate adaptation strategies.

Freetown, Sierra Leone Flood Hazard Maps
  • Last Updated: Nov 24, 2025
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Classification: Public
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License: Creative Commons Attribution 4.0
This dataset is licensed under Creative Commons Attribution 4.0
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