The Brahmaputra, also called Tsangpo-Brahmaputra, is a trans-boundary river and one of the major rivers of Asia. From its origin in southwestern Tibet as the Yarlung Zangbo River, it flows across southern Tibet to break through the Himalayas in great gorges and into Arunachal Pradesh where it is known as Dihang. It flows southwest through the Assam Valley as Brahmaputra and south through Bangladesh as the Jamuna. There it merges with the Ganges to form a vast delta. About 2,900 km long, the river is an important source for irrigation and transportation. The Yarlung Tsangpo originates in the Jima Yangzong glacier near Mount Kailash in the northern Himalayas. It then flows east for about 1,700 kilometres upto Tibet. Maximum stretch lies in Bangladesh.