Ouham

The Ouham rises on the Bouar and Baboua plateau, near the watershed separating the Chad and Congo basins. It flows north and east through wooded savanna before continuing as the Bahr Sara, one of the principal headwaters of the Chari. Its waters join the Chari north of Sarh, far from the high country where the river begins its long course towards Lake Chad.

The later city of Bossangoa lies here.