Dhaka, May 31 -- Though long accustomed to monsoon floods, Dhaka has in recent years experienced unprecedented waterlogging that persists for weeks, even after moderate rainfall.

A growing number of studies blame clogged drains from polythene bags and the loss of natural canals due to encroachment as major reasons for the prolonged waterlogging in the city.

A study led by Sarwar Uddin Ahmed and Keinosuke Gotoh, affiliated with Nagasaki University's Faculty of Engineering and Graduate School of Science and Technology, respectively, has delved into the environmental dynamics of Dhaka's waterlogging problem.

Their research, combining Contingent Valuation Method (CVM) surveys and satellite remote sensing, highlights the complex interplay b...