Abstract In the Ganges-Brahmaputra Delta (GBD) and other tide-dominated systems,
periodic flooding of the land surface during the tidal cycle promotes sediment accretion and
surface elevation gain over time. However, over the past several decades, anthropogenic
modification of the GBD tidal deltaplain through embankment construction has precluded
sediment delivery to catchment areas, leading to widespread channel siltation and
subsidence in poldered landscapes. Amongst the current discussion on GBD sustainability …