Abstract
A coastal polder was constructed in southwestern Bangladesh to safeguard urban and agricultural lands from tidal inundation and monsoon flooding. Due to polders, tides deposited sediment in the riverbeds rather than the floodplains, which halted the natural flow of the rivers and lead to chronic waterlogging. Later, the waterlogging problem was solved by an innovative concept, tidal river management (TRM). However, the TRM operation was not fully effective and successful due to technical, social, and institutional limitations. In this study, the history of coastal borders, the adverse impact of borders, the genesis of TRM, and the problems in TRM operation are discussed. Three socially acceptable options were generated using participatory rural appraisal tools to make the TRM operation effective and successful. The technical feasibility of these options was assessed using a mud transport model. Economic analysis was also carried out. Finally, the most suitable option was suggested for future TRM practice.
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