| 摘要: |
| 应用AR谱和多维最大熵谱方法分析了杭州湾北岸张家厍潮滩的波浪、潮流及潮滩滩面高程数据。结果表明，潮滩的变动和潮流、波浪变化的关系十分密切，潮滩滩面高程具有30，15，2—5d的周期变化；冬春季节潮滩变化以潮流作用造成的低频变化为主，夏秋季节则由低频向高频转移，波浪引起的潮滩高频变化也很显著；低潮滩到中潮滩下部的冲淤变化与潮流作用关系密切，中潮滩上部、高潮滩的冲淤变化对常浪性质的波浪作用具有明显的响应。 |
| 关键词: 潮滩 谱分析 杭州湾 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助，49106060号 |
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| SPECTRAL ANALYSIS OF THE DYNAMIC SYSTEM OF TIDAL FLAT AT ZHANGJIASHE ON THE NORTH BANK OF HANGZHOU BAY |
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Zhang Keqi, Jin Qingxiang, Wang Baocan
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Institute of Estuarine and Coastal Research, East China Normal University, Shanghai 200062
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| Abstract: |
| A daily measured set of data on the one year elevation of the tidal flat, wave height and tidal current at Zhangjiashe of Hangzhou Bay was analysed by using autoregressive and multichannel maximum entropy spectrum techniques in order to explore the features of tidal flat changes in the frequency domain. The results showed that the 30 and 15 day period tidal flat changes caused mainly by the monthly and spring-neap change of tidal currents, that there was a remarkable correlation between the changes of wave height and the less than 15 day period tidal flat variations, that during winter, tides dominated the changes of the tidal flat and during summer both waves and tides played important roles in variations of the tidal flat, that the changes of elevation in the lower part of the middle flat and the low tidal flat related closely to variations of tidal currents, and that the changes of elevation in the high tidal flat and the upper part of the middle tidal flat responded significantly to the variations of wave. |
| Key words: Tidal flat, Spectral analysis, Hangzhou Bay |
