The Lomami rises in the south of the country, near Kamina, and flows north through Lubao, Tshofa, Kombe, Bolaiti, Opala and Irema before joining the Congo at Isengi.
This area is surrounded by plateaus merging into savannas in the south and southwest, by mountainous terraces in the west, and dense grasslands extending beyond the Congo River in the north.
The river and its tributaries (major offshoots include the Kasai, Sangha, Ubangi, Aruwimi, and Lulonga) form the backbone of Congolese economics and transportion, they have a drastic impact on the daily lives of the people.
Kinshasa and Brazzaville are actually on opposite sides of the river at the Pool (see NASA image), then the river narrows and falls through a number of cataracts in deep canyons (collectively known as the Livingstone Falls), and then running past Boma into the Atlantic.
Downstream from this point the river is navigable and arcs west, then south to Kinshasa, forming much of the boundary between the Republic of the Congo and the DRC.
Largely rural, the population is concentrated in the eastern highlands and along rivers.
The principal seaports are Matadi and Boma, on the lower Congo River, and Banana, at the river’s mouth.