多波束测深系统在水下地形测绘中的应用OA

To accurately obtain the underwater topographic data of the water intake at the Xiaqiao Hydropower Sta-tion in the Longjiang River Valley Irrigation Zone,the T50-P multi-beam echo sounder system was employed for underwater topographic surveying and mapping.To address the limitations of traditional single-beam echo sounding technology such as data gaps between survey lines,insufficient capability for micro-topographic detection,and ter-rain distortion caused by grid interpolation,the multi-beam echo sounder technology achieves full coverage and de-tailed detection of underwater terrain through wide-swath acoustic fan-beam scanning and high-density point cloud acquisition.During the field survey,the multi-beam equipment was mounted on a manned motor vessel,and data were efficiently acquired in the survey area combined with attitude positioning and sound velocity correction.Through comparative checks and verification using single-beam echo sounder mounted on an unmanned vessel at selected sampling points and the use of the WPIS software for statistics and computation,the accuracy met the re-quirements of specifications.The results demonstrate that the multi-beam system can accurately locate the position of the old dam body,clearly reveals the micro-topographic features such as steep slopes and reefs,avoids the risk of terrain distortion caused by single-beam interpolation processing,provides centimeter-level three-dimensional spa-tial data support for the site selection of the water intake,and meets the quality requirements of surveying and map-ping products.