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Which tributaries enter the upper and middle Yenisey River?

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Yenisey River The Ob and Yenisey river basins and their drainage networks.

The upper and middle sections of the Yenisey River receive water from several significant tributaries.

The largest tributaries entering the upper and middle reaches of the river include:

From the left: The Khemchik River and the Abakan River.1
From the right: The Tuba River.1

These tributaries are primarily fed by melting snow and rainwater, leading to high water levels in late April followed by summer rain floods. While the Angara River is often classified as a tributary, its massive volume and regulation by Lake Baikal make it a major hydrological feature that marks a transition point in the river's course.12