Brahmaputra River flow from the Himalayas into Arunachal Pradesh, where it is known as Digang. It flow through the Assam Valley and Bangladesh before emptying into the Bay of Bengal
Narmada River originates at Amarkantak and flows westwards into Madhya Pradesh and Gujarat over a length of 1312 Km before draining through the Gulf of Cambay (Khambat) into the Arabian Sea.
Tungbhadra River is formed by the confluence of two river , Tunga and Bhadra in Karanataka. Tungabhadra is 531 km long and mingles with Krishna River in Andhra Pradesh.
Ganga river is formed by the merger of Alaknanda and Bhagirathi rivers in Devaprayag. It is the longest India river flowing south and east through North India into Bangladesh, where it empties into the Bay of Bengal