Tsangpo river

Yarlung Tsangpo yar klung gtsang po ཡར་ཀླུང་གཙང་པོ། 雅鲁藏布江
Yarlung Tsangpo southwest of Lhasa
Country	China, India, Bangladesh
Basin features
Main source	Angsi Glacier in Tibet (Xigazê, Tibet Autonomous Region,  China)
Basin size	912,000 km2 (352,000 sq mi)
Tributaries	Left: Raka Tsangpo, Nimu Maqu, Lhasa, Nyang
Physical characteristics
Length	2,840 km (1,760 mi)
Discharge	Average rate: 16,240 m3/s (574,000 cu ft/s)

Yarlung Tsangpo (sometimes called Yarlung Zangbo or Yarlung Zangbo Jiang (Tibetan: ཡར་ཀླུངས་གཙང་པོ་, Wylie: yar kLungs gTsang po, ZYPY: Yarlung Zangbo), or Yalu Zangbu River (simplified Chinese: 雅鲁藏布江; traditional Chinese: 雅魯藏布江; pinyin: Yǎlǔ Zàngbù Jiāng) is the longest river of Tibet.The part Tsangpo probably originates from the fact that the river flows from or through Tsang- encompassing the Tibet west of Lhasa.

It is the upper stream of the Brahmaputra River. Originating at Angsi Glacier in western Tibet, southeast of Mount Kailash and Lake Manasarovar, it later forms the South Tibet Valley and Yarlung Tsangpo Grand Canyon before passing into the state of Arunachal Pradesh, India.

Downstream from Arunachal Pradesh the river becomes phenomenally wider and is called the Siang. After reaching Assam, the river is known as Brahmaputra. From Assam, the river enters Bangladesh at Ramnabazar. From there until about 200 years ago it used to flow eastward and joined the Meghna River near Bhairab Upazila. This old channel has been gradually dying. At present the main channel of the river is called Jamuna River, which flows southward to meet Ganges, which in Bangladesh is called the Padma.