Ghagra is one of the significant rivers of the northern India. It originates near the Manasarowar Lake in Tibet. This 1080 km long river is an important tributary of the Ganges
. Its total catchment area is 127,950 sq km of which 45% is in India.
Ghagra River passes through Nepal where it is known as Kauriala. It joins the Ganges at Chapra in Bihar. This river is the main source of water in Bara-Banki District of Uttar Pradesh.
Rapti, Little Gandak, Sarda and Sarju are the major tributaries of this river. The Ghagra River is also known by the names Manchu and Karnali.