联合分潮重组与验潮修正的江苏海域深度基准建立方法
The Establishment of Chart Datum Based on Tide Constituent Recombination and Tidal Constraint in Jiangsu Coast
赵祥伟 1陈正宇 1谢朋朋 1柯灝2
作者信息
- 1. 中国能源建设集团江苏省电力设计院有限公司,江苏南京,211102
- 2. 武汉大学中国南极测绘研究中心,湖北武汉,430079
- 折叠
摘要
构建连续无缝深度基准对于江苏沿岸海域海洋测绘及海洋工程具有重要意义,然而用于构建连续无缝深度基准的潮汐模型在近海海域精度较差.针对这一情况,本研究利用江苏沿岸的若干长期验潮站数据,分别对FES2014、TPXO9和DTU10这3个主流潮汐模型进行精度评估,选取各自的最优分潮重组为一个新的潮汐模型;采用差比和差分法对重组模型进行精化改善,结果显示采用差分精化法效果更优且更稳定,可将模型在近岸水域的精度提高40％左右;根据精化后的重组潮汐模型构建连续无缝深度基准模型,得到的深度基准的变化趋势及特征与该海域的潮差分布特征较为吻合.
Abstract
The construction of seamless chart datum has great significance for marine mapping and engineering in coastal wa-ters of Jiangsu. However,the precision of tidal model used to construct the datum is poor in offshore waters. To solve this problem,several long-term tide observation stations along the Jiangsu coast are used to evaluate the accuracy of three main tidal models,FES2014,TPXO9 and DTU10,respectively,and then a new tidal model is reconstructed by recombining the optimal tide constituents. Then,ratio and difference meth-od are used to refine the recombination model respectively. The results show that the difference method is better and more stable,which can improve the accuracy of the tidal mod-el in the nearshore waters by about 40％. According to the re-fined recombination model,the seamless chart datum is built. The variation trend and characteristics of the datum are rela-tively consistent with the characteristics of the local tidal range in the sea area.
关键词
分潮/重组/验潮修正/深度基准/江苏海域Key words
tide constituent/recombination/tidal constraint/chart datum/Jiangsu coast引用本文复制引用
基金项目
&&(32-JK-2022-029)
自然资源部海洋测绘重点实验室开放研究基金资助课题(2021B14)
出版年
2024
NETL
NSTL
万方数据