Study on wave-damping characteristics of rigid plants in tidal flats

被引：0
|
作者：
Zhang Z. [1 ,2 ,3 ]
Huang B. [1 ,2 ,3 ]
Liu D. [1 ,2 ,3 ]
Qiu J. [1 ,2 ,3 ]
机构：
[1] Guangdong Research Institute of Water Resources and Hydropower, Guangzhou
[2] State and Local Joint Engineering Laboratory of Estuarine Hydraulic Technology, Guangzhou
[3] Southern Marine Science and Engineering Guangdong Laboratory ( Zhuhai), Zhuhai
来源：
Shuili Xuebao/Journal of Hydraulic Engineering | 2023年 / 54卷 / 08期
关键词：
drag coefficient; physical model tests; wave attenuation by plant; wave attenuation coefficient; wave attenuation models;
D O I：
10.13243/j.cnki.slxb.20230071
中图分类号：
学科分类号：
摘要：
The plants in tidal flats are beneficial to water security in coastal areas, and quantifying the wave attenuation effect of mature plants is the basis for improving the resilience of the coasts. Based on general rules and two wave attenuation models, this paper has put forward a new method for calculating the wave attenuation coefficient of plants in tidal flats, which can be used to calculate the wave height behind plants. Then, these expressions have been validated by a large amount of experimental data. Finally, the results of wave height behind plants calculated by this method have been compared to the standard method. The results show that the damping factor and wave attenuation coefficient can directly reflect the wave attenuation characteristics and the proportion of plant area to cross-sectional area in the direction of wave propagation is the key dimensionless parameter that affects the mechanism of wave attenuation by rigid plants. When plants emerge, the calculated value of the wave height behind plants by this method is close to the standard method; while when plants are submerged, this method can describe the wave attenuation more accurately. Compared to the standard method, this method considers the influence of plant submergence, and intuitively reveals the influence of the density, width, height of the canopy, average diameter of plants, water depth, and other parameters, making it suitable for more conditions. A model based on this method can be used to estimate the impact of relevant parameters on the wave attenuation by plants, which can provide a significant basis for the planning and design of rigid plants in tidal flats and related mathematical model research. © 2023 China Water Power Press. All rights reserved.
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页码：910 / 929
页数：19
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