To address the challenges of high vessel traffic volume,the conflict between navigation and simultaneous construction operations,and the limited capacity of dumping areas along the deep-water channel of the Yangtze River Estuary,this study proposes and implementes a grid-based operation model for channel maintenance and dumping area management,aiming to enhance channel maintenance efficiency and ensure sustainable utilization of dumping areas.The methodology involves grid-based division of shallow areas combined with longitudinal strip allocation to optimize the operational scope and precision of trailing suction hopper dredgers.Concurrently,dynamic sub-zoning management of dumping areas is implemented,incorporating regular bathymetric monitoring and temporary no-dumping zones to ensure uniform and safe sediment disposal.The results show that a 10% improvement in targeted dredging efficiency,with sediment dissipation rates in dumping areas approaching 100% and the water depth is stable at over 9 meters,while achieving zero disposal-related accidents.The grid-based operations effectively resolve the dual challenges of efficient channel maintenance under complex hydrodynamic conditions and limited disposal capacity through refined spatial management and dynamic scheduling.This study provides valuable technical references for intelligent maintenance of similar estuary waterways and supports the strategic role of the Yangtze River Estuary channel in regional economic development.Future research could further enhance the adaptive capabilities of grid-based technology through integration with intelligent dredging equipment and real-time data platforms.