| 崇明岛南侧盐沼潮滩消能状态研究 |
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| 引用本文： | 马烨贝,戴志军,庞文鸿,马彬彬,王杰.崇明岛南侧盐沼潮滩消能状态研究[J].海洋工程,2021,39(5):162-170. |
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| 作者姓名： | 马烨贝 戴志军 庞文鸿 马彬彬 王杰 |
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| 作者单位： | 华东师范大学 河口海岸学国家重点实验室, 上海 200062 |
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| 基金项目： | 上海市国际科技合作基金项目（19230712400）；国家自然科学联合重点基金项目（U2040202）；国家自然科学基金青年项目（41806106） |
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| 摘 要： | 沿海盐沼潮滩可以有效降低波浪高度,耗散波浪能量,在海岸防护和沿海城市安全中扮演着重要角色。以长江河口崇明岛南侧盐沼潮滩为对象,基于不同潮间带实测波浪变化数据,采用波能衰减模型对波浪横向沿潮滩衰减状态进行定量分析,由此探讨波浪衰减主控要素。结果表明:波浪沿盐沼潮滩向岸传播过程中,波高以及波能大幅下降,其中光滩—芦苇前部区域波能平均下降19%,芦苇区域波能平均下降71%,有植被覆盖区域对波浪的衰减效应更为显著。同时,水深、入射波高及阻力是影响盐沼潮滩波浪衰减的主要因素,波浪衰减强度随水深增大而减小,入射波高增加以及阻力的增大而增强。
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| 关 键 词： | 盐沼潮滩 植被 波浪衰减 消能强度 长江口 崇明岛 |
| 收稿时间： | 2020/10/2 0:00:00 |
Research on the wave energy dissipation over salt marsh tidal flat in the south of Chongming Island |
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| MA Yebei,DAI Zhijun,PANG Wenhong,MA Binbin,WANG Jie.Research on the wave energy dissipation over salt marsh tidal flat in the south of Chongming Island[J].Ocean Engineering,2021,39(5):162-170. |
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| Authors: | MA Yebei DAI Zhijun PANG Wenhong MA Binbin WANG Jie |
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| Institution: | State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China |
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| Abstract: | Coastal salt marsh tidal flat can effectively damp wave height with wave energy dissipation, which plays an important role in coastal protection and coastal city security. Based on the measured wave data of different intertidal zones from the salt marsh tidal flat in the south of Chongming Island, the Yangtze estuary, a wave energy attenuation model was used to explore the wave attenuation along the tidal flat and the main controlling factors of wave attenuation. The results show that both the wave height and wave energy are decreased significantly during the wave propagation along the salt marsh tidal flat landward. Wave energy is dissipated by 19% on average between the mudflats and the forepart of the reed area, while 71% on average in the reed area, and the wave energy dissipation effect is more significant in the area covered by vegetation than that in bare flat. Meanwhile, water depth, incident wave height and resistance are the main factors affecting the wave attenuation of salt marsh tidal flat. Wave energy dissipation intensity will increase with the decrease of water depth and the increase of incident wave height and drag coefficient. |
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| Keywords: | tidal flat vegetation wave attenuation wave energy dissipation intensity the Yangtze estuary Chongming Island |
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