不同沉积物养护海滩对台风响应的差异性研究

束芳芳; 蔡锋; 戚洪帅; 刘建辉; 雷刚

doi:10.3969/j.issn.0253-4193.2019.07.009

不同沉积物养护海滩对台风响应的差异性研究

doi: 10.3969/j.issn.0253-4193.2019.07.009

束芳芳^{1, 2,},
蔡锋^2, ,,
戚洪帅²,
刘建辉³,
雷刚²

1.
中国海洋大学海洋地球科学学院，山东青岛 266100
2.
自然资源部第三海洋研究所海洋与海岸地质实验室，福建厦门 361005
3.
自然资源部海岛研究中心，福建平潭 350400

基金项目: 国家海洋局第三海洋研究所基本科研业务费（20170305，2011010）；国家公益性行业（海洋）科研专项（201405037）。

详细信息

作者简介:
束芳芳（1984—），女，安徽省安庆市人，主要从事海岸动力地貌与海洋水动力学研究。E-mail：shufangfang@tio.org.cn

通讯作者:
蔡锋（1965—），男，福建省厦门市人，教授，主要从事海岸动力地貌与海滩保护研究。E-mail：fcai800@126.com

中图分类号: P737.1; P732
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出版历程
- 收稿日期: 2018-08-29
- 修回日期: 2018-11-27
- 网络出版日期: 2021-04-21
- 刊出日期: 2019-07-25

Study on various response to typhoon of nourished beaches with different sediments

Shu Fangfang^{1, 2
,},
Cai Feng^{2
, ,},
Qi Hongshuai²,
Liu Jianhui³,
Lei Gang²

1.
College of Marine Geosciences, Ocean University of China, Qingdao 266100, China
2.
Lab of Coastal & Marine Geology, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
3.
Island Research Center, Ministry of Natural Resources, Pingtan 350400, China

摘要

摘要: 本文通过对厦门天泉湾人工卵石滩和会展人工沙滩在1614“莫兰蒂”超强台风影响前后的典型剖面监测，结合水文动力要素的观测和数值模拟，计算了台风影响过程的波浪场、总水位，分析了剖面形态和台风过程的剖面平均变化量。结果表明，强潮海岸人工卵石滩与人工沙滩对台风响应的特征明显不同，人工卵石滩横向上大部分卵石向岸输移堆积，滩面侵蚀，滩肩堆积形成更高的风暴滩肩，坡度明显变陡。而人工沙滩则表现为明显的沉积物离岸输运，上部滩面侵蚀，下部滩面淤积，滩面坡度明显变缓，受台风登陆后的强烈向岸风作用，滩肩顶有所夷平，滩肩高度变化很小。海滩滩肩在台风过程中是否侵蚀与台风登陆和影响过程的总水位(天文潮、风暴增水、波浪爬高)密切相关，两个人工海滩的风暴响应模式均为冲蚀；台风影响过程中，波浪能量相对强、滩面坡度相对陡的人工卵石滩比人工沙滩的剖面平均变化量小，对于台风的响应程度小，在强侵蚀高能海岸采用砾石等粗粒径沉积物进行海滩养护是减缓砂质海滩侵蚀的一种有效手段。
- 强潮海岸 /
- 人工卵石滩 /
- 人工沙滩 /
- 台风响应
Abstract: By monitoring the typical profiles of the artificial cobble and sandy beach on Xiamen Tianquan Bay and Huizhan before and after the super Typhoon No.1614 Meranti, combined with the observation and numerical simulation of hydrodynamic factors, we calculate the wave field together with the total water level during the typhoon process, and analyze the morphology and the average variation of the profile. Results show that the characteristics of response to typhoon between artificial cobble and sandy beach on macro-tidal coast are significantly different. The majority of cobbles transported onshore, the beach face eroded while the beach berm accumulated to form a higher beach berm, and the slope of the artificial cobble beach is obviously steepened. In contract, the artificial sandy beach shows obvious sediment transport offshore, the upper beach face eroded and the lower beach face deposited, the slope of the beach face obviously become gentler, moreover the top of the beach berm become flattened due to the strong onshore wind after the typhoon landing, and the height of the beach berm almost remain unchanged. Whether the beach berm eroded during typhoon process is closely related to the total water level including astronomical tide, storm surge and wave run-up. During the process of typhoon, the artificial cobble beach characterized with higher wave energy and steeper beach slope showed less profile variation comparing to that of the artificial sandy beach. The artificial cobble beach performed a small degree of response to typhoon. Taken together, it is an effective approach of slowing sandy beach erosion by using gravels and other coarse-grained sediments for beach nourishment on strong eroded high-energy macro-tidal coasts.
- macro-tidal coast /
- artificial cobble beach /
- artificial sandy beach /
- typhoon response

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图 1 研究区位置示意图

a. “莫兰蒂”台风路径；b. 研究岸段区域位置；c. 天泉湾人工卵石滩；d. 会展人工海滩

Fig. 1 Schematic diagram of the location of the research area

a. Path of Typhoon Meranti; b. location of the study coast segment; c. Tianquan Bay artificial cobble beach; d. Huizhan artificial sandy beach

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图 2 “莫兰蒂”台风期间研究区风速、风向过程曲线图

Fig. 2 Curves of wind processes in the research area during Typhoon Meranti

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图 3 台风浪模型计算网格

Fig. 3 Computing grid of the typhoon wave model

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图 4 计算风、波浪过程与浮标站观测值时间序列验证

Fig. 4 The verification of wind and wave processes at buoy stations

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图 5 “莫兰蒂”台风过境前后波浪场模拟结果

a.9月15日3时波浪场；b.9月15日5时波浪场；c.研究区台风波浪过程曲线

Fig. 5 Wave results before and after Typhoon Meranti

a. Wave results on 3 September 15th; b. wave results on 5 September 15th; c. wave process

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图 6 人工海滩“莫兰蒂”台风过程总水位

Fig. 6 Total water level of the artificial beach during Typhoon Meranti

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图 7 “莫兰蒂”台风前后照片

a, b分别为天泉湾人工卵石滩经历台风前、后; c, d分别为会展人工海滩经历台风前、后

Fig. 7 Photos before and after Typhoon Meranti

a, b are photos of Tianquan Bay artificial cobble beach before and after typhoon; c, d are photos of Huizhan artificial sandy beach before and after typhoon

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图 8 典型剖面形态变化

Fig. 8 Typical profiles of the artificial cobble and sandy beach

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图 9 典型剖面滩肩宽度、滩肩高度、滩面坡度变化

a, b, c. 天泉湾人工卵石滩; d, e, f. 会展人工沙滩

Fig. 9 Variations of the beach berm height, width and beach slope

a, b, c. Tianquan Bay artificial cobble beach; d, e, f. Huizhan artificial sandy beach

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图 10 “莫兰蒂”台风过程典型剖面高程变化量

a. 天泉湾人工卵石滩; b. 会展人工沙滩

Fig. 10 Variations of typical profiles elevation during Typhoon Meranti

a. Tianquan Bay artificial cobble beach; b. Huizhan artificial sandy beach

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图 11 人工海滩风暴响应特征（典型剖面平均值）

a. 人工卵石滩; b. 人工沙滩

Fig. 11 Storm response characteristics of artificial beaches (mean profile)

a. Artificial cobble beach; b. artificial sandy beach

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表 1 海滩养护工程基本情况

Tab. 1 The overview of the beach nourishment project

海滩	岸段长度/m	养护沉积物总量/10⁴ m³	养护沉积物粒径/mm	施工滩肩宽度/m	施工滩面宽度/m	滩肩高程/m	初始坡度
天泉湾人工卵石滩	632	5.71	50～100	13～20	35～46.5	4.0	1:5
会展人工沙滩	1 795	74.75	0.5	50	100～150	4.0	1:15

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表 2 “莫兰蒂”台风过程人工海滩波浪能量–剖面变化

Tab. 2 Wave energy and variations of artificial beach profile during Typhoon Meranti

海滩	中值粒径/mm	最大波浪能量/kW·m⁻¹	平均波浪能量/kW·m⁻¹	最大剖面平均变化量/m	剖面平均变化量/m
天泉湾人工卵石滩	70	12 259	1 937	0.30	0.20
会展人工沙滩	0.5	7 097	1 820	0.46	0.28

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