改进的曲线比较法传递平均海平面  

Improved Curve Comparison Method Transmiting Mean Sea Level

作　　者：章鹏[1] 岳建平[1] Zhang Peng Yue Jianping(School of Earth Science and Engineering,Hohai Universit)

机构地区：[1]河海大学地球科学与工程学院,南京市210098

出　　处：《勘察科学技术》2017年第3期20-22,共3页Site Investigation Science and Technology

基　　金：国家自然科学基金项目"融合形变遥测技术与数据处理方法研究"(编号:41174002)

摘　　要：为了获得稳定的平均海平面,必须要有长期验潮站的水位观测数据,而长期验潮站的布设密度有限,通常在测量期间布设短期或临时验潮站,所以可以利用长期验潮站的信息,用传递的方法推估得到稳定的平均海平面。该文改进了曲线比较法,用以传递推估短期或临时验潮站的平均海平面。由于曲线比较法的精度取决于两验潮站潮汐变化的相似性,因此,先用离散Frechet距离的方法判断两验潮站短期同步海平面的相似性,再利用基于MATLAB的曲线比较法传递平均海平面,并通过实例证实了该方法的可靠性。In order to obtain the stable mean sea level, the long-term observation data of the water level of the tide gauge station must be observed. But the layout density of long-term tide gauge station is limit- ed, usually the short-term or temporary tide gauge station will be laid during the measurement period. So using the information of long-term tide gauge station, the transmiting method can estimate the stable mean sea level. In this paper, the curve comparison method is improved to transfer the average sea level of short-term or temporary tide stations. Because the accuracy of the curve comparison method depends on the similarity of the tidal changes in the two tide gauge stations, in this paper, we first use the method of discrete Frechet distance to judge the similarity of the short-term synchronous sea level of two tide sta- tions. Then the mean sea level is transmited by using the curve comparison method based on MATLAB. The reliability of the method is verified by an example.

关 键 词：平均海平面 相似性 离散Frechet距离 曲线比较法 

分 类 号：P714.1[天文地球—海洋科学] P731.23