基于GNSS的单波束测深系统在大中型水库水下地形测量中的应用

Application of Single Beam Bathymetry System Based on GNSS in Underwater Topographic Survey of Large and Medium Sized Reservoirs

随着水库在经济社会发展中所起的作用日趋明显,对水库的开发、治理更加重视,获取高精度的水库水下地形数据变得更加急迫。随着测深技术、差分GNSS技术以及姿态传感器的不断发展,基于GNSS的测深系统为水下地形测量提供了全新的解决方案。通过合理规划测线,经过声速改正、吃水改正,利用船载GNSS导航定位和测深仪采集测深数据,经转化处理后快速生成水下地形测量成果。本文依托山东省东平湖水库,探索研究基于山东省卫星定位连续运行综合应用服务系统(以下简称SDCORS)及似大地水准面精化模型开展空间三维坐标定位,采用单波束测深仪进行水深测量,经数据处理生成水下高程点及数字高程模型的技术方法及解决方案,为大规模开展此类项目提供参考依据。

Accompanying with the increasingly obvious role of reservoirs in economic and social development,the government pays more attention to the development and management of reservoirs.It becomes more urgent to obtain highprecision underwater topographic data of reservoirs.Accompanying with the development of the bathymetry technology,differential GNSS technology and attitude sensor,the sounding system based on GNSS provides a new solution for underwater topographic survey.Through reasonable planning of survey line,sound speed correction and draft correction,navigation and positioning of ship borne GNSS,and collection of sounding data by depth sounder,the underwater topographic survey results can be quickly generated after transformation and processing.Taking Dongping Lake Reservoir in Shandong province as an example,technical methods and solutions of spatial threedimensional coordinate positioning has been studied based on Shandong satellite positioning continuous operation integrated application service system(hereinafter referred to as SDCORS)and quasi geoid refined model.By using single beam bathymeter for water depth measurement,and generating underwater elevation points and digital elevation model through data processing has been generated.It can provide some references for such projects.