| 基于数值模拟的皇后湾滨海沙滩离岸流特性研究 |
| Numerical Simulation Study on the Characteristics of Rip Currents in Coastal Beach of Queen Bay Tourism Area |
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| DOI：10.3969/j.issn.1003-2029.2025.06.008 |
| 中文关键词: FUNWAVE-TVD 波高 水深地形 离岸流 数值模拟 |
| 英文关键词:FUNWAVE-TVD wave height bathymetry rip currents numerical modeling |
| 基金项目:海南省科技厅科技专项项目（ATIC-2023010003）；海南省重点研发计划资助项目（ZDYF2023GXJS023） |
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| 中文摘要: |
| 离岸流是一种常见的近岸海洋动力现象，有些离岸流对滨海沙滩区域的游客安全构成重大威胁。本文基于 FUNWAVE-TVD(Fully Nonlinear Boussinesq Wave Model with Total Variation Diminishing)数值模型，以三亚市皇后湾为研究区，利用精确的水深地形测量成果，结合波浪、潮汐等数据，分析了不同波高和潮位条件下离岸流的分布特征及其动力学机制。研究结果显示:研究区的离岸流是往复流和沿岸流等共同作用的结果，往复流主要发生在与入射波高方向垂直的沙滩区域，沿岸流主要发生在岬角区域，离岸流主要发生在往复流与沿岸流相交界的区域;离岸流的面积和强度与波高和潮位密切相关，随着入射波高的增加，离岸流强度和覆盖面积显著增大;通过对比高、中、低三个潮时的模拟结果，发现在低潮位时，由于水体体积减小导致能量密度增大，离岸流流速普遍高于中高潮位时。本文的定量化分析提高了对皇后湾复杂水动力过程的理解，为预测和防范离岸流提供了重要的科学依据，也为类似滨海旅游区的管理和规划提供了有价值的参考。 |
| 英文摘要: |
| Rip currents are a common nearshore marine dynamic phenomenon. In coastal beach tourist areas, rip currents may occur and pose significant threats to safety of visitors in these regions. In this paper, we choose the Queen Bay in Sanya City as the study area. Using the bathymetric topography data combined with wave, tide, and other related data as the basic background values, the FUNWAVE-TVD model are chosen to analyze the distribution characteristics and dynamic mechanisms of rip currents under different wave heights and tidal levels. The results show that the rip currents in the study area are caused by the combined effects of reciprocating flows and long-shore flows. Reciprocating flows primarily occur in beach areas perpendicular to the direction of incoming wave heights, while longshore flows mainly occur in headland regions. Rip currents predominantly develop in the zones where reciprocating flows intersect with long-shore flows. The area size and intensity of rip currents are closely related to wave height and tidal levels. As the incoming wave height increases, the strength and coverage area of rip currents significantly increase. We also compare the simulation results at high, medium, and low tides. The results show that the speed of rip currents are generally higher during low tide than high tide, due to the reduced water volume leading to increased energy density. The quantitative analysis of this research enhances the understanding of the complex hydrodynamic processes in the Queen Bay. Our research will provide important scientific evidence for predicting rip currents, valuable references for the management and planning of similar coastal tourist areas. |
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