Devprayag, in Uttarakhand, India, is the birthplace of the Ganges River. The Ganges is formed by the confluence of the Bharathi River (muddy in the picture) and its tributary, the Alakananda (blue in the picture). Starting from here, the Ganges flows more than 2,500 kilometers (1,553 miles) before reaching its mouth in the Bay of Bengal.

Photograph by Asis Chatterjee, MyShot

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tributary
tributary Encyclopedic Entry

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A tributary is a freshwater stream that feeds into a larger stream, river or other body of water. The larger, or parent, river is called the mainstem.

river
river Encyclopedic Entry

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A river is a large, natural stream of flowing water. Rivers are found on every continent and on nearly every kind of land.