| 潮汐调和分析与应用研究 |
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| 引用本文： | 石景元,路川藤.潮汐调和分析与应用研究[J].海洋技术,2019,38(6):46-50. |
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| 作者姓名： | 石景元 路川藤 |
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| 作者单位： | 东海航海保障中心,上海200090;南京水利科学研究院,江苏南京210029 |
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| 摘 要： | 基于长江口外鸡骨礁、绿华山潮位站多年实测潮汐资料,开展潮汐调和分析与应用研究。采用最小二乘法计算调和常数,研究不同分潮组合及不同资料长度对调和分析结果的影响。采用规范法及直接预报法计算深度基准面,并分析计算结果。采用余水位订正方法推算潮位,并进行精度验证。结果表明:调和分析精度随分潮个数的增加而提高;采用年实测潮汐资料调和分析的精度总体高于采用多年实测潮汐资料调和分析的精度;采用预报年份相邻的年实测潮汐资料进行潮汐预报精度较高;理论最低潮面计算值,规范法较直接预报法偏小。基于绿华山站与鸡骨礁站实测资料进行余水位推算验证,精度基本满足实用要求。
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| 关 键 词： | 调和分析 理论最低潮面 余水位 |
Harmonic Analysis and Application of Tides |
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| SHI Jing-yuan and LU Chuan-teng.Harmonic Analysis and Application of Tides[J].Ocean Technology,2019,38(6):46-50. |
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| Authors: | SHI Jing-yuan and LU Chuan-teng |
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| Abstract: | In this paper, the harmonic analysis and application of tides are carried out, based on the measured tidal data of Jigujiao and Lvhuashan stations outside the Yangtze Estuary for many years. The harmonic constants are calculated by the least square method to study the effects of different tidal assemblages and different data lengths on the harmonic analysis results. The depth datum is calculated by standard method and direct prediction method, and the tide level is calculated by the residual water level correction method and the accuracy is verified. The results show that the accuracy of harmonic analysis increases with the increase of tidal number. Comparing with using the observed tide data for many years, the accuracy of harmonic analysis based on annual measured tidal data is generally higher, meanwhile, the accuracy of tidal prediction by using the observed tidal data of adjacent years is relatively high. As for the theoretical minimum tidal surface, the results obtained by the standard method are smaller than those obtained by the direct prediction method. The accuracy of residual water level calculation and verification based on the measured data of Jigujiao and Lvhuashan stations basically meets the practical requirements. |
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| Keywords: | harmonic analysis Theoretical minimum tidal surface Residual water level |
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