The Simulation of Typhoon Waves in Taiwan Strait

Abstract

采用第3代海浪模式SWAn(SIMulATIOn WAVES nEArSHOrE),在考虑了波浪折射、底摩擦、破碎、白浪、风能输入、非线性波波相互作用等物理过程的基础上,分别应用JElESnIAnSkI模型风场、藤田气压公式计算的梯度风场以及考虑台湾海峡和台湾岛地形影响的台风风场(陈德文台风风场)模型,数值模拟了0813号“森拉克“、0815号“蔷薇“和0908号“莫拉克“3场台风过程在台湾海峡产生的台风浪,并与浮标观测结果对比.结果表明,陈德文台风风场模型数值模拟的台风浪结果与实测符合较好,其中模拟结果的有效波高平均绝对误差为0.55M,有效波高峰值平均绝对误差为0.19M,说明其对台风浪的模拟尤其是灾害性台风浪的模拟是成功的.The third generation wave model SWAN(simulation waves nearshore)was applied to simulate the typhoon waves in Taiwan Strait,during the 0813 "Sinlaku",the 0815 "Jangmi",and the 0908 " Morakot".The model considered wave refraction,bottom friction,wave breaking,whitecapping,wind input,and nonlinear wave-wave interactions.Three kinds of wind models,Jelesnianski wind model,Fujita wind model,and the wind model that considered the Taiwan Strait and Taiwan′s topographic effects(Chen De Wen typhoon wind model),were adopted to derive the input wind velocities for SWAN wave model respectively.Compared with the buoy data,the significant wave height driven by Chen typhoon wind model showed relatively high consistence,with the mean absolute error of significant wave height and the peak significant wave height of 0.55mand 0.19mrespectively.This indicated that the simulation of typhoon waves in this study was successful.海洋公益性行业科研专项(200905013-7

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