基于单波束条带测深仪的大中型水库水下地形图测绘方法  

A method for underwater topographic surveying and mapping of large and medium-sized reservoirs based on single beam strip sounder

作　　者：周海春 金裕平 ZHOU Haichun;JIN Yuping(Lishui Jinhui Surveying and Mapping Company Limited,Lishui,Zhejiang 323000,China)

机构地区：[1]丽水市金绘测绘有限公司,浙江丽水323000

出　　处：《北京测绘》2024年第10期1498-1503,共6页Beijing Surveying and Mapping

摘　　要：在大中型水库的水下地形图测绘中,常规方法主要依赖数据高程特征匹配,却常因信号介质差异而引发不可忽视的误差,从而影响测绘精度。为了提升测绘的准确性,本文提出基于单波束条带测深仪的大中型水库水下地形图测绘方法。在大中型水库的水下区域进行单波束条带测深仪的点位高程布设,并基于声速数据差值的计算结果对信号数据误差进行修正。定义水下地形图的深度基准面,在此基础上,将网格化的单波束信号数据进行线性差值,完成高精度的水下地形图的测绘。实验结果表明:本文所提方法应用后得出的测绘结果,表现出的地形极点差异度较小,测绘精度较高,满足了大中型水库在建设与运维过程中的高精度测绘需求。In the underwater topographic surveying and mapping of large and medium-sized reservoirs,conventional methods mainly rely on data elevation feature matching,but they often cause significant errors due to differences in signal media,thereby affecting the accuracy of the surveying and mapping.In order to improve the accuracy of surveying and mapping,a method for underwater topographic surveying and mapping of large and medium-sized reservoirs based on a single beam strip sounder was proposed.The point elevation layout of a single beam strip depth sounder was carried out in the underwater area of large and medium-sized reservoirs,and the signal data error was corrected based on the calculation results of the difference in sound velocity data.The depth reference plane for underwater topographic maps was defined,and based on this,linear interpolation was performed on the gridded single beam signal data to complete high-precision underwater topographic surveying and mapping.The experimental results show that the surveying results obtained by the proposed method exhibit small differences in topography poles and high surveying accuracy,meeting the high-precision surveying and mapping requirements for the construction,operation,and maintenance of large and medium-sized reservoirs.

关 键 词：大中型水库 水下地形 单波束条带测深仪 地形图测绘 水库水下地形 测绘方法 

分 类 号：P237[天文地球—摄影测量与遥感]