Nzvimbo idzi dziri mukati meGanges Delta yekumabvazuva kweIndia inenge 75 km (47 mi) kumadokero kwemuganhu wepasi rose neBangladesh; kukwirira kweguta iri 1.59 m (530 ft). Zvizhinji zveguta iri pakutanga yaive nzvimbo ine hunyoro iyo yakadzorerwa pamusoro pemakumi emakore kuti igone huwandu hwevanhu huri kukura. Nzvimbo dzakasara dzisina kuvandudzwa, dzinozivikanwa seEast Kolkata Wetlands, dzakatarwa se "nzvimbo ine hunyoro hwepasi rose" neRamsar Convention (1975). Sezvakaita mazhinji eIndo-Gangetic Plain, ivhu nemvura zvinonyanya kunge zvine mavambo.
nzvimbo inodengenyeka III