| 波控岬间海滩剖面短期变化过程分析 |
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| 引用本文： | 戴志军,陈子燊,张清凌. 波控岬间海滩剖面短期变化过程分析[J]. 热带地理, 2001, 21(3): 266-269 |
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| 作者姓名： | 戴志军 陈子燊 张清凌 |
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| 作者单位： | 1. 中山大学河口海岸研究所
2. 中国科学院南海海洋研究所 |
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| 基金项目： | 国家自然科学基金资助项目 ( 4 96 76 2 97) |
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| 摘 要： | 利用粤东寮咀口岬间海滩重复测量的剖面数据，通过经验特征函数及主要空间函数的分析和功率谱估计分析，结果表明，海滩剖面主要由2个空间模式构成：前滨模式和滩肩模式。空间模式在时域上具有一定的振荡周期。其中，前滨模式以4天的准周期变化为主，滩肩模式则有2．8天的准周期性变化。此外，影响海滩剖面短期变化的主要动力因素是波浪，台风大浪则是剖面迅速变化的直接驱动力。
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| 关 键 词： | 海滩剖面 经验特征函数 功率谱分析 剖面过程 前滨模式 滩肩模式 空间模式 |
AN ANALYSIS ON TEMPORAL VARIATION PROCESS OF A WAVE DOMINATED BEACH PROFILE BETWEEN HEADLANDS |
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| DAI Zhi jun ,CHEN Zi shen ,ZHANG Qing ling. AN ANALYSIS ON TEMPORAL VARIATION PROCESS OF A WAVE DOMINATED BEACH PROFILE BETWEEN HEADLANDS[J]. Tropical Geography, 2001, 21(3): 266-269 |
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| Authors: | DAI Zhi jun CHEN Zi shen ZHANG Qing ling |
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| Affiliation: | DAI Zhi jun 1,CHEN Zi shen 1,ZHANG Qing ling 2 |
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| Abstract: | Based on the repeatedly measured profile data on the beach between headlands of the Liaozuikou bay in east Guangdong, the main variation processes of beach profile are analyzed with empirical orthogonal function and power spectrum. The results show that the profile variations are composed of two modes which are foreshore mode and beach berm mode. These modes have obviously oscillations in temporal domain, in which the foreshore mode has mainly quasi period about 4 days,while the quasi period for the beach berm mode is 2 8 days. Moreover, the main dynamic factor that influences temporal processes of profile is wave power. Typhoon and big wave actions are direct driving powers for the quick variety of the profile. |
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| Keywords: | Beach profile Empirical eigenfunctions Analysis of power spectrums Profile processes |
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