The Brahmaputra is a trans-boundary river, also called Tsangpo. It is one of the foremost rivers of Asia. From its origin in North-western Tibet as the Yarlung Tsangpo River, it flows across the southern Tibet to break through the Himalayas in great gorges and into Arunachal Pradesh (India) where it is known as Dihang. It flows southwest through the Assam Valley as Brahmaputra and south through Bangladesh as the Jamuna (not to be mistaken with Yamuna of India).
In the vast Ganges Delta it merges with the Padma, the main distributory of the Ganges, then the Meghna, before emptying into the Bay of Bengal. The Brahmaputra is about 1,800 miles (2,900 km) long. The river is very important for irrigation and transportation. The average depth of the river is 124 feet (38 m) and maximum depth is 380 feet (120 m). The Brahmaputra also causes annual floods in the Assam Valley. This happens when snow in the Himalayas melt. It is navigable for most of its length. The lower reaches are sacred to Hindus. While most rivers on the Indian subcontinent have female names, this river has rare male name, as it means "son of Brahma" in Sanskrit (“Putra” means "son").