Research on Seafloor Topographic Bathymetry Problem Based on Multibeam Line Optimization Model

This paper discusses the model optimization problem of multibeam bathymetry technology in the measurement of uneven seabed terrain. Firstly, a multibeam coverage width optimization model based on the seabed slope is defined, the relationship between slope, transducer opening angle and seawater depth is analyzed, and the corresponding coverage width formula is obtained. The angle between the survey line direction and the normal direction of the seabed slope is further considered, the overlap rate is optimized to reduce the measurement error, and the optimal survey line scheme is designed by the specific sea data. And finally the model is validated by applying the actual seawater depth data, and key parameters such as the total length of the survey line and the area of missed measurements are obtained.