fig1
Figure 1. Map of Dhaka city, Bangladesh, showing the three urban rivers sampled in this study: BR, TR, and SR. Sampling sites were distributed across upstream (1), midstream (2), and downstream (3) locations for each river (e.g., BR1–BR3, TR1–TR3, SR1–SR3). BR: Buriganga River; TR: Turag River; SR: Shitalakkha River.
