 In Nepal, the river basin lies in the Sarlahi District, and the river originates in the Sivalik Hills.The river enters India in the Sitamarhi district of Bihar, and flows through the town of Sitamarhi.It then enters the Muzaffarpur district, and joins the Bagmati at Katra (within the Muzaffarpur district).before joining baghmati river split in two parts one part join baghmati while another one remain open & known as kali khadai near khangura village.