Every day, the megalopolis of Kolkata generates almost 750 million litres of wastewater and sewage, and the East Kolkata Wetlands act as a fully effective organic sewage management system. It is aptly regarded as the city's kidney. It also serves as the city's natural flood control system. It is odd that there is little concern about the demise of an important wetland habitat on the planet. The survival of East Kolkata Wetlands has become a problem due to growing urbanisation and changes in urban form over the last few decades. The EKW has a total area of 12500 ha, of which approximately 45.93% is water and 38.92% is agricultural land. The methodology comprises the full production of Landsat TM and Landsat Oli TRS landuse maps for 1991 and 2021. The Ramsar-designated East Kolkata Wetland is the world's largest natural sewage treatment system that is biologically productive and supports a diverse ecosystem of flora and fauna. In this light, the primary purpose of the research is to investigate the 30-year temporal land use changes as well as the causes of the rapid transition. A land use and biodiversity study has been developed to investigate temporal changes as well as local people's perspectives.
