Abstract: The paper introduces the composition, working principle and operation methods of multibeam sounding system as well as the theoretical basis of detection by unmanned submersibles vehicles. The detection practice for the energy dissipation pond in a hydropower station has proved that the combined application of multi-beam sounding system and unmanned submersibles vehicles is effective in detection of hydraulic structures and satisfactory results can be obtained.

Key words: multi-beam sounding system, unmanned submersibles vehicles, hydraulic structures, combined detection

摘要： 介绍了多波束测深系统和水下无人潜航器的工作原理、作业方法，提出联合检测技术思路，通过在某水电站消能塘水下检测的工作实践，证明使用多波束与水下无人潜航器在水工建筑物联合检测中可以得到令人满意的检测结果。

关键词: 多波束测深系统, 水下无人潜航器, 水工建筑物, 联合检测