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(sĕlĕng-gä`), river, 616 mi (992 km) long, rising in the Khangai Mts., NW Republic of Mongolia, and flowing east, then north, across the Mongolian-Russian border to Lake Baykal; the Orkhon River is its main tributary. The Selenga, navigable from May to October, is Mongolia's chief river; its role as a transportation artery decreased with the advent of the Trans-Baykal RR. Ulan-Ude, an important Russian rail junction, river port, and industrial center, is the largest city on the river.



a river in the Mongolian People’s Republic and the Buriat ASSR. The Selenga is formed by the confluence of the Ider and Muren rivers and empties into Lake Baikal, creating a delta 680 sq km in area. Approximately half of the river water that enters Lake Baikal comes from the Selenga. The river is 1,024 km long from the source of the Ider River; 409 km of the lower course is in the USSR. It drains an area of 447,000 sq km. The main tributaries are the Egin-Gol and Orkhon in Mongolia and the Dzhida, Chikoi, Khilok, and Uda in the USSR.

The Selenga is primarily a flatland river, with narrow sections of the valley (to 1–2 km) alternating with troughlike wider sections (to 20–25 km) where it frequently divides into branches. It has low spring highwater, with flash floods in summer and fall caused by rain; the low-water period occurs in winter. The mean flow rate is 310 cu m per sec near the Mongolia-USSR border and 935 cu m per sec 127 km from the mouth. The river is frozen over from November through April. There is regular navigation to Sukhe-Bator in Mongolia. The capital of the Buriat ASSR, Ulan-Ude, is situated on the Selenga, as is the urban-type settlement of Selenginsk.


Kuznetsov, N. T. Gidrografiia rek Mongol’skoi Narodnoi Respubliki. Moscow, 1959.
Cherkasov, A. E. Vodnye resursy rek basseina Baikala, ikh ispol’zovanie i okhrana. Irkutsk, 1973.


References in periodicals archive ?
Under the plan, three dams were to be built: one at the Selenga River, which accounts for some 80% of all water that flows into the lake, and two at its main tributaries - the Eg River and the Orkhon River.
All 75 villages in Gbo and Selenga are participating in the pilot.
1930--Issue of the vegetation in Selenga delta--In: Proceedings Commission of Lake Baikal investigation.
The training programme's first semester would last 33 months, Selenga said, adding most of Afghan youth were jobless and the programme would provide them work opportunity.
Another site where pollution is very worrying is the mouth of the River Selenga, which carries 50% of all the water entering Lake Baikal.
3] It seems that the Otuken Mountains correspond to some part of the modern Khangay Mountains, from which the Orkhon and Selenga flow; some sources indicate that the term referred to the eastern foothills of the Khangay, near the Orkhon, while others suggest that it could mean the entire Khangay range.
The northern half of Baikal isn't polluted by the level of industrial and human wastes that flows into it from the Selenga River in the southeast and the towns of Baikalsk and Slyudyanka farther south.
A paper plant, a municipal sewage facility, and a score of factories dump their effluents into the Selenga River at Ulan Ude to the southeast, joining pollution from industry at Ulan Baatar in Mongolia.
The man was found in satisfactory condition 5 kilometers away from the estuary of Selenga River.
Request for quotations: Provision Of Services For The Export Of Selenga RB Municipal Solid Waste
Selenga on the 124 km highway A-340 Ulan-Ude-Kjahta-border with Mongolia