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The Western Dvina or Daugava (Belarusian: Заходняя Дзьвіна (Zahodniaja Dźvina), Latvian: Daugava, Russian: Западная Двина́, Polish: Dźwina, German: Düna, Estonian: Väina) is a river rising in the Valdai Hills, Russia, flowing through Russia, Belarus, and Latvia, draining into the Gulf of Riga, an arm of the Baltic Sea.
It is not to be confused with Northern Dvina.
There are three hydroelectric dams on the river - Rīgas HES just upstream from Riga or 35 km from the mouth of the river, Ķeguma HES another 35 km further up or 70 km from the mouth, and Pļaviņu HES another 37 km upstream or 107 km from the mouth.
Dvina, river, Russia, CIS And Baltic Physical Geography
It is formed near Veliki Ustyug by the union of the Sukhona and Yug rivers, flows N past Kotlas, then turns northeast, and empties into Dvina Bay, an arm of the White Sea, just below Arkhangelsk.
It is connected with the Volga-Baltic Waterway by the Sukhona River and the Northern Dvina Canal.