南海沿海港口航道图深度基准面计算与评估  

Calculation and evaluation of chart datum for coastal port and fairway in the South China Sea

作　　者：何志敏 俞成明 王华强 卢秉武 周争桥 HE Zhimin;YU Chengming;WANG Huaqiang;LU Bingwu;ZHOU Zhengqiao(Guangzhou Hydrographic Center,NGCS of MOT,Guangzhou 510320,China)

机构地区：[1]交通运输部南海航海保障中心广州海事测绘中心,广东广州510320

出　　处：《海洋测绘》2023年第6期34-37,65,共5页Hydrographic Surveying and Charting

基　　金：广州海事测绘中心创新工作室2022年课题研究计划(2022-5)。

摘　　要：《海道测量规范》(GB 12327—2022)正式实施,按照新规范评估南海沿海港口航道图深度基准面值,能为海洋垂直基准的维护提供数据支持。对广州海事测绘中心辖区17个长期水位站长于2年的水位数据、长期站邻近的28个短期、临时水位站数据进行潮汐分析,评估了长期水位站的L值及深度基准面保证率,分析了短期、临时水位站平均海面、深度基准面的传递精度。结果表明:17个长期水位站3种算法深度基准面保证率均超过98%,保证了航行的安全性;不同方法确定的深度基准面L值互差,53%的长期水位站超过10 cm,7%短期、临时水位站超过15 cm,11%短期、临时水位站两种方法L值中数与原采用值差值超过15 cm,亟需修正南海沿海港口航道图深度基准值。The"Specifications for Hydrographic Survey"(GB 12327-2022)is formally implemented.Evaluation of chart datum for coastal port and fairway in the South China Sea can provide data support for the maintenance of marine vertical datum in accordance with the new specifications.This article analyzes the water level data longer than 2 years from 17 long-term water level stations in the area under the jurisdiction of Guangzhou Hydrographic Center,and the data of 28 short-term and temporary water level stations adjacent to the long-term station.It evaluates the L value and depth datum guarantee rate of the long-term water level stations,and analyzes the transmission accuracy of the mean sea level and chart datum of the short-term and temporary water level stations.The results demonstrate that the depth datum guarantee rate of the three algorithms of 17 long-term water level stations exceeded 98%,ensuring the safety of navigation.L values of depth datum surfaces of different methods are different,53%of long-term water level stations exceed 10 cm,7%short-term and temporary water level stations exceed 15 cm,11%of short-term and temporary water level stations,the difference between the median L values of the two methods and the original values exceeds 15 cm,and it was urgent to remedy the values of chart datum for coastal port and fairway in the South China Sea.

关 键 词：海洋测绘 南海沿海港口航道图 调和分析 统计余水位 传递平均海面 评估深度基准面 

分 类 号：P229.21[天文地球—大地测量学与测量工程]