| 摘要: |
| 参数化风场模型在台风浪的模拟后报中有着广泛应用, 其中关键风场参数的参数化方案直接影响着台风浪场模拟的准确性。为确定适合浙江海域台风浪模拟的Holland风场关键参数(包括风速剖面参数B和最大风速半径参数Rmax)组合的最佳方案, 本文采用第三代海浪数值模型SWAN (Simulating WAve Nearshore), 对自2011年以来影响浙江沿海的10次典型台风浪事件进行了数值模拟。利用4场台风期间气象站和波浪浮标的实测资料, 分别从风速和有效波高角度对B和Rmax的不同组合方案进行了率定分析, 确定并推荐了一组最佳参数组合; 进一步依据Jason卫星在10场台风影响下的有效波高观测资料, 验证了推荐方案对波浪场空间分布的模拟效果。结果显示: 相较于参数B, 参数Rmax的不同表达式对台风风速和有效波高模拟的影响更为显著; Willoughby的Rmax表达式与Powell的B表达式结合使用时, 能实现最符合实际的风速和有效波高随时间变化的模拟, 并可较好地再现台风浪场的空间分布特征, 模拟结果较实测值的相关系数可达0.90。 |
| 关键词: 浙江沿海 台风浪 Holland参数化模型 风速剖面参数 最大风速半径参数 |
| DOI：10.11759/hykx20241107001 |
| 分类号:P731.33 |
| 基金项目:国家自然科学基金项目(52271273) |
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| Numerical simulation of typhoon-induced waves in Zhejiang coastal waters using the Holland parameterization model |
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CHEN Peixian1, ZHAO Hongjun1, WANG Junda1, ZHANG Wanwei2, YANG Jie1
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1.College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China;2.Institute of Water Science and Technology, Hohai University, Nanjing 210098, China
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| Abstract: |
| Parameterized wind field models are widely used in simulating typhoon-induced waves, with the accuracy of such simulations heavily influenced by the parameterization schemes used for key wind field variables. This study aims to identify the optimal combination of Holland wind field parameters, namely the wind profile parameter B and the maximum wind speed radius parameter Rmax, suitable for typhoon wave simulations in Zhejiang coastal waters. Using the SWAN model, we conducted numerical simulations of ten typical typhoon wave events affecting the Zhejiang waters since 2011. Focusing on wind speed and significant wave height, we calibrated combinations of B and Rmax against observational data from meteorological stations and wave buoys during four typhoons; this calibration process led to the selection of an optimal parameter set for B and Rmax. Furthermore, we validated this parameter combination by comparing significant wave height data from Jason satellite observations against simulations of wave spatial distribution during ten typhoon events. The results indicate that the Rmax parameter has a greater impact on the accuracy of wind speed and significant wave height simulations compared to the B parameter. Among the tested combinations, using Willoughby's expression for Rmax in conjunction with Powell's expression for B yielded the most accurate results. This combination successfully captured the temporal variations in wind speed and significant wave height while also reproducing the spatial distributions of typhoon-induced waves. Overall, the model achieved a correlation coefficient as high as 0.90 when compared with Jason satellite observations. |
| Key words: Zhejiang coastal waters typhoon waves Holland parameterization model wind profile parameter maximum wind speed radius parameter |
