The western edge of the delta is the river earlier known as Bhagirathi - Ganga, later the Hooghly, which flows south into the sea.
Deltas rietumu mala ir upe, kas kādreiz tika saukta par Bagirati Gangu, bet tagad pazīstama ar nosaukumu Hugli, un tā plūst dienvidu virzienā un ietek okeānā.