- English
Urban wetlands provide vital ecosystem services such as habitat provision, water purification, flood regulation,
climate regulation, food provision, and recreation. However, rapid urban expansion has placed tremendous
pressure on urban wetland environments, leading to their shrinkage. East Kolkata Wetland (EKW), a Ramsar site
near urban area noted for its high biological diversity. Moreover, this wetland also acts as retardation basin for
managing flooding in the neighboring areas and purifies a significant portion of the wastewater received from the
city of Kolkata through application of local ecological knowledge (LEK). Despite its high significance, the
wetland is facing different threats in terms of encroachment, pollution etc. This study aims to assess possible
future changes of the East Kolkata Wetland (EKW) through integrating spatiotemporal data with socio-legal data
over the past 23 years. The study uses Shannon’s entropy model together with the number of litigation cases. The
results indicate that the entropy value increased from 0.394 in 1993 to 0.413 in 2023, suggesting a more
dispersed distribution of development, primarily towards the east. This shift is contributing to the conversion of
the East Kolkata Wetlands (EKW) into real estate developments. The study also reveals that 95 % of litigation
cases in the EKW are related to unauthorized construction and the filling of water bodies. These unsustainable
developments can increase Kolkata’s exposure to more severe flooding together with loss of food security and
biodiversity. The research provides valuable insights for policymakers by offering spatial zones of sensitivity
depending upon categories of conversion and suggest steering urban growth away from the east, which could
minimize degradation of the EKW and be crucial for Kolkata’s long-term sustainability.
- English
