Dredging process underwater terrain inversion method based on mass conservation and real-time positioning

The invention relates to a dredging process underwater terrain inversion method based on mass conservation and real-time positioning in the technical field of dredging, which comprises the following steps of: 1, measuring the initial terrain and water depth of a dredging area, and carrying out grid division; 2, horizontal coordinates of a dredging point are measured through a real-time dynamic positioning system, the number of cells where the dredging point is located is obtained through a grid search algorithm, the mud flow of a dredging pipeline is measured through a shipborne flowmeter, the concentration measurement position is the position of a mud suction opening, and the concentration measurement mode is the resistance tomography technology based on an underwater electrode sensor array; 3, the horizontal coordinates of the dredging points, the number of cells of the dredging points, the dredging pipeline slurry flow information and the dredging pipeline slurry concentration are imported into a data proc