Selemdzha River (Селемджа in Russian) is a river in the Amur Oblast in Russia. It is the biggest tributary of the Zeya River. The length of the river is 647 km. The area of its basin 68,600 sq km. Its main tributaries are the Ulma and Nora. The Selemdzha River freezes up in early November and stays under the ice until early May. The Murray River in Australia. ... The Amur Oblast (Амурская область, Amurskaya oblast) (363,700 km², pop. ... 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. ... Zeya River (Russian: Зе́я), 1242 km (771 mi) long, is a left tributary of the Amur River. ... A kilometre (American spelling: kilometer), symbol: km is a unit of length in the metric system equal to 1000 metres (from the Greek words χίλια (khilia) = thousand and μέτρο (metro) = count/measure). ... Square kilometre (US spelling: Square kilometer), symbol km², is an SI unit of surface area. ... For other uses, see November (disambiguation). ... This article is about the month of May. ...