Imo River

The Imo River (Igbo: Imo Mmiri) is in southeastern Nigeria and flows 240 kilometres (150 mi) into the Atlantic Ocean. Its estuary is around 40 kilometres (25 mi) wide, and the river has an annual discharge of 4 cubic kilometres (1.0 cu mi) with 26,000 hectares of wetland. The Imo's tributary Rivers are the Otamiri and Oramirukwa. The Imo was cleared under the British colonial administration of Nigeria in 1907–1908 and 1911; first to Aba and then to Udo near Umuahia.