潮汐作用下的海滩风沙运动若干特征研究——以福建平潭岛远垱澳海滩为例

何岩雨; 刘建辉; 蔡锋; 李柏良; 王立辉; 周昌懋

doi:10.3969/j.issn.0253-4193.2018.09.008

潮汐作用下的海滩风沙运动若干特征研究——以福建平潭岛远垱澳海滩为例

doi: 10.3969/j.issn.0253-4193.2018.09.008

1.
福州大学土木工程学院, 福建福州 350108;国家海洋局海岛研究中心海岛保护处, 福建平潭 350400
2.
国家海洋局海岛研究中心海岛保护处, 福建平潭 350400
3.
国家海洋局第三海洋研究所, 福建厦门 361005
4.
西交利物浦大学环境科学系, 江苏苏州 215123
5.
福州大学土木工程学院, 福建福州 350108

基金项目: 国家自然科学基金青年科学基金项目（41406070）；国家公益性行业（海洋）科研专项（200905008，201405037）。

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出版历程
- 收稿日期: 2017-09-05
- 修回日期: 2018-04-03

Several characteristics of beach aeolian sand transport influenced by tide: A case study in the Yuandangao Beach, Pingtan Island, Fujian Province

1.
School of Civil Engineering, Fuzhou University, Fuzhou 350108, China;Island Protection Office, Island Research Center, State Oceanic Administration, Pingtan 350400, China
2.
Island Protection Office, Island Research Center, State Oceanic Administration, Pingtan 350400, China
3.
The Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China
4.
Department of Environmental Science, Xi'an Jiaotong-Livepool University, Suzhou 215123, China
5.
School of Civil Engineering, Fuzhou University, Fuzhou 350108, China

摘要

摘要: 海岸风沙是海岸带陆-海-气相互作用的突出产物。本文通过福建平潭岛远垱澳海滩风沙全环境要素观测，从海滩风沙垂向分布、滩面风沙起动和搬运等方面，探讨并总结自然海滩潮汐动态作用下的风沙运动过程。主要研究结论为：（1）海滩湿沙表面风沙流绝大部分（98.9%）在离滩面30 cm高度层内运动，不同粒径组沙粒的垂向分布形式不同；（2）潮汐旋回中的海滩起沙风速显著高于同等粒径内陆沙漠地区，其变化过程主要为滩面平均表层湿度与风区长度相互"博弈"的结果；（3）海滩风沙输送量主要受风速、滩面平均表层湿度与风区长度耦合作用，涨落潮不同阶段输沙量变化的主导影响因素不同；（4）"干沙起动+湿沙表面传输"为典型的海滩风沙搬运模式之一，滩面风沙运程较短，总体呈"接力"式特征向海岸前缘沙丘搬运。
- 潮汐 /
- 海滩风沙 /
- 垂向分布 /
- 起动 /
- 搬运
Abstract: Coastal aeolian is a typical product of sea, land and air interaction. Based on a comprehensive observation of beach aeolian sand in the Yuandangao beach of Pingtan Island, Fujian Province, this paper aims to explore and summarize the vertical distribution, entrainment and transport characteristics of beach aeolian sand influenced by tide. The main conclusions are as follows:(1) The vertical distribution of wind-sand flow in intertidal zone is almost entirely(98.9%) in the range of 0-30 cm, and the specific distribution function varies with different particle size; (2) The threshold velocity of beach aeolian sand is significantly higher than that of inland desert, and the changing process of it in the tidal circulation mainly reflects the interaction between average surface moisture and fetch length; (3) The wind-blown sand flux of intertidal zone involves the interaction of average surface moisture, fetch length and wind speed, and the dominant factors of its changing process vary in different stages of ebb and flow; (4) Entrainment of sand from a dry source and transport across a moist surface is one of the typical beach aeolian sand transport mode, with a short delivered distance at a time, and a highly relayed way of overall transport.
- tide /
- beach aeolian sand /
- vertical distribution /
- entrainment /
- transport

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