The Vitim River is a major tributary of the Lena River. With its source east of Lake Baikal, the Vitim flows 1,978km north through the Transbaykalian Mountains and the town of Bodaybo. Upstream of Bodaybo, the Vitim is navigable to its confluence with the Lena, west of Lensk. A tributary (or affluent or confluent) is a contributory stream, a river that does not reach the sea, but joins another major river (a parent river), to which it contributes its waters, swelling its discharge. ... The Lena River (Russian: Ле́на) in Siberia is the 10th longest river in the world and has the 9th largest watershed. ... The word source has more than one meaning: // Information Source Edit: A software program for developers in which you can edit your source code regardless of the computer language. ... Lake Baikal The Yenisei River basin, Lake Baikal, and the cities of Dikson, Dudinka, Turukhansk, Krasnoyarsk, Irkutsk Lake Baikal (Russian: О́зеро Байка́л (Ozero Baykal)), a lake in southern Siberia, Russia, between Irkutsk Oblast on the northwest and Buryatia on the southeast, near Irkutsk. ... A confluence is the merger or meeting of two or more objects (or subjects) that seem to inseparably bind their respective forces or attributes into a point of junction. ...