The scientists used a computer model to study how tides move through the Ganges-Brahmaputra-Meghna delta in the Bay of Bengal. They found that the shape of the river channels, the depth of the water, and the flow of the river all affect how far the tides can reach into the delta. The model was able to accurately predict water levels at different locations, even when the river flow was strong. The depth of the water was the most important factor in determining water levels in the delta. This study helps us understand how tides and rivers interact in this complex delta system.