Which river system drains most of Central Africa?

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The Congo River system drains most of Central Africa. This vast hydrographic basin, which covers an area of approximately 1,335,000 square miles (3,457,000 square km), is the most prominent geographic feature of the region.1234

The basin acts as a central depression, collecting water from a dense network of tributaries that flow from the surrounding highlands toward the main river channel. The river eventually cuts through ridges parallel to the coast to drain into the Atlantic Ocean.413