Abstract: Nowadays, the single-beam bathymetric system and multi-beam bathymetric system have been widely used in the underwater topographic mapping of the Yangtze River, and people have higher and higher requirements on the accuracy of underwater topographic data of inland waterways. By using the single-beam integrated with inertial navigation system(INS)bathymetric system, the problem of low precision of traditional single-beam, complex installation and operation of multi-beam system and high requirement of water condition is solved well. In this paper, the practical application of single-beam integrated with INS bathymetric system in the survey of the Yangtze River channel is compared with the traditional single-beam and multi-beam survey data. The results show that single-beam integrated with INS bathymetric system can meet the demand of high precision survey of the Yangtze River channel very well.

Key words: single-beam, multi-beam, single-beam integrated with INS, Yangtze River channel survey