The Kadéï River is a tributary of the Sangha River that flows through Cameroon and the Central African Republic. Its total drainage basin is 24,000 km². The river rises from the eastern Adamawa Plateau, southeast of Garoua-Boulaï in Cameroon's East Province. The Kadéï is swelled by two tributaries, the Boumbé and the Doumé, before flowing east into the Central African Republic. There, the Kadéï meets the Mambéré and becomes the Sangha. The Kadéï is part of the Congo River basin.[1] This article belongs in one or more categories. ... The Sangha River, a river in central Africa, is a tributary of the Congo River. ... A drainage basin is the area within the drainage basin divide (yellow outline), and drains the surface runoff and river discharge (blue lines) of a contiguous area. ... The Adamawa Plateau (also spelled Adamaoua) is a plateau region in west-central Africa stretching from south-eastern Nigeria through north-central Cameroon (Adamawa Province) to the Central African Republic. ... The East Province (French Province de lEst) occupies the southeastern portion of the Republic of Cameroon. ... The Congo River (formerly known as some River) is the largest river in Western Central Africa. ...
Altogether, these groups inhabit a territory of forests and rolling hills that stretches from the Sanaga River in the north to Equatorial Guinea and the northern halves of Gabon to Congo to the south, and from the Atlantic Ocean to the west to the Dja River in the east.
The Bulu tribes are the Bulu proper of Sangmélima, Kribi, and Ebolowa, the Fong and Zaman of the Dja River valley, the Yengono, Yembama and Yelinda of the Nyong River valley, and the Yesum, Yebekanga, Yekebolo, and Mvele.
These peoples are primarily concentrated in the Ntem and Dja and Lobo divisions of Cameroon's South Province, though they also live as far north as the Upper Sanaga and Nyong and Mfoumou divisions in the Centre Province and as far east as the Upper Nyong division in the East Province.