Water Resources

AWSE brings together hydrology, hydrogeology and river engineering to secure water resources and reduce exposure to natural hazards.

Services delivered

Hydrology, hydrogeology and hydro-meteorology
Watershed and water-resources management
Resource assessment for water supply and hydropower potential
Natural hazards, river engineering, flood and sediment transport
Hydrometry and above/below-water surveys
Climate-change adaptation and mitigation studies

Watershed characterisation & flood risk mapping

Water resources studies require a clear spatial reading of catchments and drainage. AWSE delineates urban watersheds, maps stream networks and flood risk areas across Freetown to inform stormwater design, land-use planning and safeguards.

Map of the six main watersheds of Freetown with stream network and flood risk areas — Lumley, Congo Valley, Alligator, Bambara, Grandville and Kissy — Six main watersheds of Freetown — Lumley, Congo Valley, Alligator, Bambara, Grandville and Kissy — with stream network and flood risk areas.

Sierra Leone references

View references

2020African Development Bank (AfDB)

Guma Valley — Freetown Water Supply & Sanitation Priority Investments (PIP)

Guma Valley Water Company

Water SupplyWater ResourcesHydrogeology & Drilling

View project

2021African Development Bank (AfDB)

Guma Valley — Hydrogeological investigations, consolidated feasibility & IFC-standard ESIA

Guma Valley Water Company

Water SupplyWater ResourcesE&S Safeguards

View project