The researchers studied how changes in river flow affect tides in the Ganges‐Brahmaputra‐Meghna Delta in Bangladesh. They used a computer model to simulate different river flow scenarios. They found that during the dry season, tides can travel 75 km further upstream. Higher river flow increases the slope of water levels and slows down tides beyond 100 km from the estuary. The balance between creating and reducing tides changes based on river flow, which affects how tides behave in the delta. High river flow can dampen both high and low tides faster than it can create new tides.