In the basin, most of the soils except those restricted to the mountains are derived from deposits corresponding to the Lake Chad variations during the Quaternary Period. The dry periods have caused: - regression cycles of the Lake water - a lacustrine sedimentation - windblown deposits The rainy periods have caused: - a rise of the Lake level - a fluvio-lacustrine sedimentation - Rearrangements and formation of ravines in the windblown and alluvial deposits. There are several types of soils in the basin: mineral soils from wind origin with little changes over time, isohumic soils, tropical ferruginous soils, hydromorphic soils, vertisols and halomorphic soils. This information is from the Faure Study in 1963.

Name
Soil
Lakes
Main Rivers
Capitals
Country Borders
DTM medium resolution
Hill shades DTM
Current Lake Extent

Faure Study in 1963