Bityug River (Russian: Битюг) is a river in the Voronezh Oblast in Russia, left tributary of the Don River. The upper reaches of the river are located in the Tambov Oblast. The length of the Bityug is 379 km. The area of its basin is 8,840 sq km. There are more than 400 lakes in the Bityug basin. The river freezes up in mid-December and stays icebound until late March - early April. Voronezh Oblast (Russian:Воро́нежская о́бласть) is a regional subdivision of Russia. ... 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 Don (Дон) is one of the major rivers of Russia. ... Tambov Oblast (Russian: ) is a federal subject of Russia (an oblast). ... KM, Km, or km may stand for: Khmer language (ISO 639 alpha-2, km) Kilometre Kinemantra Meditation Knowledge management KM programming language KM Culture, Korean Movie Maker. ... For the term related to television programmes, see watershed (television). ... Square kilometre (US spelling: Square kilometer), symbol km², is an SI unit of surface area. ... Look up December in Wiktionary, the free dictionary. ... Look up March in Wiktionary, the free dictionary March is the third month of the year in the Gregorian Calendar and one of seven Gregorian months with the length of 31 days. ... Look up April in Wiktionary, the free dictionary. ...