Fig. 9: GIS based map of study area and sampling locations.

The selected location is Sardar Bherry, a constructed wetland receiving urban wastewater located in the Eastern part of Kolkata city, India, spanning a ~ 140 ha area. Sampling was done from sewage canals (SC1-SC3), wetland sites A (A1–A4), B (B1–B4), C (C1–C4) and outlet canals (OC1-OC2) located within the wetland.