The Bhāgirathi-Hooghly river system is an essential lifeline for the people of West Bengal. It is through this river that the East India company sailed in to Bengal and established their trade settlement - Calcutta, which later grew up to be one of the greatest cities of the world and capital of the erstwhile British India. People from other countries like French, Dutch, Portuguese, etc. all had their trade settlement by the banks of this river.
Calcutta is the third largest metropolitan city of South East Asia, home to about 14 million people.