| 不同补沙方案对海滩剖面影响的数值模拟对比分析 |
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| 引用本文： | 梁丙臣,朱梅溪,屈智鹏,王聪,李东永.不同补沙方案对海滩剖面影响的数值模拟对比分析[J].海洋学报,2021,43(11):136-145. |
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| 作者姓名： | 梁丙臣 朱梅溪 屈智鹏 王聪 李东永 |
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| 作者单位： | 1.中国海洋大学 工程学院，山东 青岛 266100 |
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| 基金项目： | 国家自然科学基金（51739010, 51679223）；111创新引智项目（B14028） |
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| 摘 要： | 大量工程实践表明，海滩养护是当前抵御海岸侵蚀的常见措施。通过人为地向海滩补充沙源，以达到海岸防护、修复沙滩等目的。本文建立了XBeach一维海滩剖面演变数值模型，并与物理模型试验结果进行对比验证；计算常浪条件下不同方案补沙后海滩剖面达到平衡状态的速率；通过对比补沙工况与未补沙工况的风暴后剖面，分析风暴作用下的防护效果。结果发现，补沙量较大时，沙坝向海侧位置补沙在常浪条件下补沙效率高于滩肩补沙，在风暴条件下防护效果优于滩肩补沙。此次研究对于在实际海滩养护过程中节约施工成本、提高施工效率有着重要意义，同时对于评估沙滩养护工程效果有一定的参考价值。
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| 关 键 词： | 海滩养护 平衡剖面 XBeach 数值模型 人工补沙效率 |
| 收稿时间： | 2020-12-16 |
Comparative analysis on numerical simulation of the impacts of different beach nourishment schemes on beach profile |
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| Institution: | 1.College of Engineering, Ocean University of China, Qingdao 266100, China2.Hainan Province Research Academy of Environment Science, Haikou 571126, China3.Korea Institute of Ocean, Science and Technology, Busan 49111, Korea |
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| Abstract: | Numerous engineering projects show that beach nourishment is a common method against coastal erosion. Beach nourishment is an artificial process of adding sediment to a beach to increase beach width and protect it from erosion. In this paper, a 1D numerical model for beach profile was established and verified by the results of physical model experiment. In addition, the rates of profile change to equilibrium profile on different positions and different sand volume schemes were calculated, and the efficiency was compared and analyzed. To analyze the protection effects of beach nourishment, the profiles in nourishment schemes and no nourishment schemes after storm condition were compared. It turned out that when the nourishment volume was large the efficiency of bar nourishment under the calm condition was higher than of berm nourishment, and the nourishment effect under the storm condition was better. This study has important implications to save construction costs and raise working efficiency during the practical nourishment engineering. In the meantime, it sheds light on evaluating the effect of beach nourishment. |
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