Ogooué

Ogooué or Ogowe (both: ōgōwā`), river, c.560 mi (900 km) long, rising on the Batéké Plateau, SW Congo (Brazzaville). It flows NW and W across Gabon to the Gulf of Guinea, near Port-Gentil, where it forms a large delta. Navigable for most of its length, the river is the chief economic artery of Gabon.

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Ogooué 

a river in Gabon and in the People’s Republic of the Congo. It is 850 km long and drains an area of 175,000 sq km. It originates in the Southern Guinea Upland, through which it flows in a valley full of rapids. The Ogooué flows into the Gulf of Guinea, forming a delta. Its main tributaries are the Ivindo on the right and the Ngounié on the left. High water occurs all year long. The river is navigable in its lower course to the city of Ndjolé, beyond which rapids begin.