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Where does the Angara River get its water?
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Yenisey River
The Ob and Yenisey river basins and their drainage networks.
The Angara River serves as the primary outlet for Lake Baikal, which acts as its source and regulates its flow. Additionally, the Selenga (Selenge) River, which originates in western Mongolia, flows into Lake Baikal and is considered by some to be the ultimate source of the entire Yenisey-Angara river system.123