基于希尔波特-黄变换的海滩碎波带水体波动特征分析

Analysis of Water Oscillations in Beach-surf Zone based on Hilbert-Huang Transform

介绍了HHT原理及其端点效应与正交性,分析了台风过程中碎波带水体波动特征。结果表明,碎波带波浪在台风期间波能增大且向低频转移,台风过后波能减弱且向高频转移;海滩地下水波动主要受潮汐涨落影响,波动周期可能受台风增水影响;台风与天文大潮耦合导致海滩地下水位奇异性波动。

Hilbert-Huang Transform and its end issue and orthogonality were introduced to analyze the characteristic of waves in surf zone and groundwater level in beach through typhoon by HHT. The results show that wave-energy in surf zone augments and transfers to low frequency during typhoon, weakens and transfers to high frequency after typhoon. Tthe oscillation of the groundwater level in beach is influenced by tidal and its period may be influenced by typhoon; coupling of chronometer high tide and typhoon result in singularity of groundwater oscillation.