Ko enei kei roto i te raro o te Ganges Delta o te rawhiti o Inia tata ki te 75 km (47 mi) ki te hauauru o te rohe o te ao me Bangladesh; Ko te teitei o te taone nui ko te 1.59 m (530 ft). Ko te nuinga o te taone nui he whenua maamaa i whakahokia mai i roto i nga tau tekau ki te whakauru i te taupori e tipu haere ana. Ko nga waahi kaore i whanakehia, e mohiotia ana ko te East Kolkata Wetlands, i tohua hei "whenua maamaa o te ao" e te Ramsar Convention (1975). Ka rite ki te nuinga o te Indo-Gangetic Plain, ko te oneone me te wai he tino aluvial i te takenga mai. Kei runga i te "Bengal basin", he peihana pericarctic tertiary. Ko Kolkata kei roto i te raro o te Ganges Delta o te rawhiti o Inia tata ki te 75 km (47 mi) ki te hauauru o te rohe o te taone nui.
rohe wiri III