Numerical investigation of coastal profile evolution under effect of submerged flexible vegetation by XBeach wave model

IF 3.1 3区 地球科学 Q2 METEOROLOGY & ATMOSPHERIC SCIENCES Ocean Modelling Pub Date : 2024-09-25 DOI:10.1016/j.ocemod.2024.102441
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Abstract

Vegetation communities distributed in coastal zones and offshore wetlands are important compositions for sand stabilization and stability of the ecosystem. This paper studies the impact of flexible vegetation on beach profile evolution by constructing an XBeach numerical model. Firstly, the mathematical model of flexible vegetation beach is established based on the generalized vegetation parameters. The XBeach numerical model is validated by the wave flume experiment to prove that a semi-empirical equation of flexible vegetation drag coefficient is valid in beach profile evolution. Then, the numerical model is used to study the beach profile evolution with flexible vegetation under different wave parameters and summarize the corresponding laws. Finally, the differences between flexible and rigid vegetation on beach evolution are compared. Results show that the beach profile evolution roughly increased with the increase of wave parameters. The Starting Point of Evolution in beach shifts offshore and the evolution range gradually broadens as the wave height or period increases. In addition, the flexible vegetation beach shows greater evolution than rigid vegetation beach and the Starting Point of Evolution also tends to be more offshore, particularly under conditions of long periods and large wave heights. This study can provide references for beach protection and ecological restoration in coastal areas.
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XBeach 波浪模型对水下柔性植被影响下海岸剖面演变的数值研究
分布在海岸带和近海湿地的植被群落是固沙和生态系统稳定的重要组成部分。本文通过构建 XBeach 数值模型,研究柔性植被对海滩剖面演变的影响。首先,基于广义植被参数建立了柔性植被海滩数学模型。通过波浪水槽实验验证了 XBeach 数值模型,证明柔性植被阻力系数半经验方程在海滩剖面演变中是有效的。然后,利用数值模型研究了不同波浪参数下柔性植被的海滩剖面演变,并总结了相应的规律。最后,比较了柔性植被和刚性植被对海滩演变的影响。结果表明,随着波浪参数的增加,海滩剖面的演化大致呈上升趋势。随着波高或周期的增加,海滩演变的起点向外海移动,演变范围逐渐扩大。此外,柔性植被海滩比刚性植被海滩的演变幅度更大,演变起点也更趋向于离岸,尤其是在长周期和大浪高的条件下。这项研究可为沿海地区的海滩保护和生态恢复提供参考。
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来源期刊
Ocean Modelling
Ocean Modelling 地学-海洋学
CiteScore
5.50
自引率
9.40%
发文量
86
审稿时长
19.6 weeks
期刊介绍: The main objective of Ocean Modelling is to provide rapid communication between those interested in ocean modelling, whether through direct observation, or through analytical, numerical or laboratory models, and including interactions between physical and biogeochemical or biological phenomena. Because of the intimate links between ocean and atmosphere, involvement of scientists interested in influences of either medium on the other is welcome. The journal has a wide scope and includes ocean-atmosphere interaction in various forms as well as pure ocean results. In addition to primary peer-reviewed papers, the journal provides review papers, preliminary communications, and discussions.
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