Jamuna River (Bengali: যমুনা নদী) is a tributary of the Ichamati River. It flows through the Indian state of West Bengal and is one of the major rivers of the North 24 Parganas district. Till the 17th century, the Jamuna originated as a distributary of the Hooghly River separating from it near Tribeni, along with the Saraswati River , hence giving the town its name. Unlike the Saraswati that flowed southwest from Tribeni, the Jamuna used to flow eastwards, along the northern borders of the present day town of Kalyani and the region around the Indian Institute of Science Education and Research, Kolkata, in the Nadia district, then enter the North 24 Parganas district and finally merge with the Ichamati River. From the 18th century onwards, the Padma river emerged as the main distributary