一种基于多源数据的沿岸低潮面模型构建方法
A Method for Constructing Coastal Low Water ModelBased on Multi-source Tidal Data
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摘要: 目的 针对沿岸低潮面模型构建时数据多源、精度不等的现状,提出了一种基于多源数据的沿岸低潮面模型构建方法。利用验潮站低潮面数据和基于网格潮汐模型计算的低潮面数据等多源潮汐数据,改进潮汐数据插值方法,根据不同源数据精度信息进行权重配赋,构建顾及不同源数据精度差异的沿岸低潮面模型。实验结果表明,本文所提方法顾及了沿岸海域潮汐运动特点和不同源数据精度差异对建模精度的影响,可以有效利用多源潮汐数据构建较高精度的沿岸低潮面模型,满足低潮线推算等特殊应用对高精度沿岸低潮面模型的需求。Abstract: Objective A coastal low water model with high precision has important application value.Aiming toexploit the characteristics of multi-source and precision difference between different tidal data for con-structing coastal low water models,a method based on multi-source tidal data is presented in the pa-per.By utilizing multi-source tidal data,such as tidal gauge data and low water data calculated basedon satellite altimetry data,interpolation method of tidal data is modified by assigning a weight todifferently sourced data,depending on the precision information,thus the coastal low water model isconstructed considering the precision difference between different source data.Experimental resultsdemonstrate that the proposed method can utilize multi-source tidal data and improves the quality ofcoastal low water models,which can meet the demand for special applications such as extracting lowtide lines.
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