Byssa (river)

Byssa Бысса
Map section of the Selemdzha and Byssa river confluence.
Mouth location in Amur Oblast, Russia
Location
Country	Russia
Physical characteristics
Source
• location	Turan Range
• coordinates	52°32′55″N 132°11′10″E / 52.54861°N 132.18611°E / 52.54861; 132.18611
• elevation	800 m (2,600 ft)
Mouth	Selemdzha
• location	Near Byssa
• coordinates	52°25′03″N 130°33′56″E / 52.41750°N 130.56556°E / 52.41750; 130.56556
• elevation	239 m (784 ft)
Length	235 km (146 mi)
Basin size	6,370 km2 (2,460 sq mi)
Basin features
Progression	Selemdzha → Zeya→ Amur→ Sea of Okhotsk

The Byssa (Russian: Бысса) is a river in Selemdzhinsky District, Amur Oblast, Russia. It is the third longest tributary of the Selemdzha, with a length of 235 kilometres (146 mi)^[1] and with 6,370 square kilometres (2,460 sq mi) the third in drainage basin area, after the Orlovka. The name of the river originated in the Evenki language.^[2]

The river flows across a largely uninhabited area except for Byssa and Fevralsk villages in the area of its mouth. South of Fevralsk the river is crossed by the Far Eastern Railway line.^[3]