Application of Single Beam Sounding System Based on HLJCORS in Underwater Topographic Survey
Conventional underwater topographic survey needs to measure the planimetric coordinates,water depth and water level ele-vation of the measuring points to obtain the absolute elevation of underwater topography,which is complicated. In order to obtain the 3D coordinate results of underwater topography in a timely and efficient manner,this paper proposes a single beam sounding system based on HLJCORS for underwater topography survey of Shuangfeng Reservoir in Fangzheng county. This procedure is to obtain the three-dimensional coordinates of instantaneous underwater topographic points by superimposing the three-dimensional coordinates col-lected by GNSS equipment and the depth measured by the sounding system in the data acquisition software,which reduces the tide ob-servation program. The proposed method is helpful to the application and promotion of CORS system in water projects,and also pro-vides reference for similar underwater topographic survey projects.
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