1 State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology, Jiangsu Xuzhou 221116,China; 2 Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering,Ocean University of China, Shandong Qingdao 266100,China; 3 Guangdong Center for Marine Research and Development,Guangzhou 510220,China; 4 Laboratory for Marine Geology,Qingdao National Laboratory for Marine Science and Technology,Shandong Qingdao 266061,China
Abstract：Seabed geomorphology is a general term for the surface morphology of solid earth covered by seawater. Submarine geomorphic changes are often closely related to submarine geological disasters,which will cause damage to submarine pipelines,offshore platforms and other offshore engineering facilities. Therefore,in-situ observation for submarine landform is of great significance. We develop the in-situ observation system of profiling sonar for seabed micro-landform based on previous studies and the team’s years of experiments in independent research and development of instrument. The composition,function,working principle and working mode of the observation system are introduced in detail,and the processing and analysis methods of the observation data are proposed;then,the observation system is used to carry out the marker inspection experiment. By comparing the measurement data of the observation system with the measurement data of other equipment,the feasibility and data accuracy of the observation system are verified. Finally,the observation system is used to observe on the Zhujiajian landslide in Zhoushan sea area, which verified the feasibility of the observation system and showed that the observation system of profile sonar can be used for micro-landform.
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