Answer :Lualaba River, headstream of the Congo River. Its 1,100-mile (1,800-kilometre) course lies entirely within Congo (Kinshasa), central Africa. It rises on the Katanga (Shaba) plateau at about 4,600 feet (1,400 m), near Musofi, Congo. Its upper course descends to the Manika Plateau and is marked by falls and rapids. Its drop to the Kamolondo Trough (1,500 feet in 45 miles [457 m in 72 km]) is harnessed for generating hydroelectric power at Nzilo Dam, near Nzilo Falls (formerly Delcommune Falls).
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