The Ganges delta is the largest delta and occupies the lower part of the Bengal Basin of the South Asian region of Bengal. The delta has come into existence by the depositional activities of the three mighty rivers of the region: the Ganges, the Brahmaputra and the Meghna. The Ganges delta is situated just above the Bay of Bengal with its major portion occupied by Bangladesh. The delta is about 360 km wide along the Bay of Bengal. The river courses in the delta are broad and active, carrying large amounts of water. This delta is a tract of vast alluvial flat roughly resembling the Greek letter ‘D’ (Delta) and commences at the off take of the Bhagirathi near Gour of Malda district in West Bengal, India.