Sanaga River

Course

The Sanaga River has its source at the Adamawa Plateau. It is formed by the confluence of the Djérem and Lom Rivers in the north of the East Region. Djérem River has a total length of 464.5 km (288.6 mi) and Lom River a total length of 424.2 km (263.6 mi). Apart from these originating rivers, the largest tributary of the Sanaga is Mbam River with a total length of 548 km (341 mi).

Climate

The Sanaga River forms a boundary between two tropical moist forest ecoregions. The Cross-Sanaga-Bioko coastal forests lie to the north between the Sanaga River and the Cross River of Nigeria, and the Atlantic Equatorial coastal forests extend south of the river through southwestern Cameroon and Equatorial Guinea, Gabon, the Republic of the Congo, Cabinda and the Democratic Republic of the Congo.

Hydrology

The flow of the river was measured at Edéa in m3/s:

Dams and reservoirs

Beginning at the headwaters, there are 2 dams on the Sanaga River:

Transport

The Camrail railway bridges the Sanaga River at Edea.

Biodiversity and conservation

The Sanaga River supports one of Central Africa's richest freshwater ecosystems and contains numerous endemic fish species that are restricted to the Sanaga basin. The river also provides habitat for freshwater molluscs, aquatic plants, and migratory bird species associated with riparian wetlands.

Hydroelectric development has modified sections of the river, particularly through the construction of dams such as Edéa, Song Loulou, Lom Pangar, and Nachtigal. While these projects contribute substantially to Cameroon's electricity production, they have also raised concerns regarding fish migration, sediment transport, and ecological connectivity.

Conservation efforts increasingly focus on balancing hydropower production with environmental flow management and the protection of aquatic biodiversity throughout the Sanaga basin.