【摘要】 本文在分析渤海台风暴潮特征的基础上,将进入渤海的台风,按其路径的不同分为三种类型,采用动力数值计算方法,模拟了具有代表性路径的三次台风暴潮实例,取得了计算值与实测值基本一致的结果。进而用模式风暴进行风暴潮的数值估算,文中给出了10条台风移动路径,计算了在不同风速和移行速度影响下黄河口近岸12个地点的风暴潮的高度值。更多还原

【Abstract】 The hydrodynamic numerical method is employed in this paper to simulate typhoon surges of three typical tracks in Bohai Sea. The results coincide with observations.1.When the typhoon is in East China Sea and Yellow Sea or has crossed Bohai Sea, the angle between the wind direction of Jelesnianski wind field and the direction of geostrophic wind is = 15, the angle of isobar and concentric circles is =0. When the typhoon has moved into or along the east of Bohai Sea, the circular wind field effect of typhoon becomes more obvious and the value of A increases as the distance increases from the typhoon centre.2.From Tanggu to Shenxiangou, when the travelling speed of typhoon is in the range of 3 m/s-9 m/s, the maximum surge increases as the travelling speed increases. But when V0 is between 9 m/s and 15 m/s, the maximum surge decreases as the travelling speed increases.3.The maximum surges occur for the first time in Laizhou Bay, then the crest of surge propagated from north to south along the west coast around the center of the Bohai Sea appears to move anticlockwise. This is due to the influence of Coriolis force.On the basis of numerical simulation, we choose 10 tracks of typhoon and assume that each typhoon has a travelling speed 9.8 m/s and 12.3 m/s respectively. The maximum wind velocities are 15 m/s, 20 m/s, 25 m/s, 30 m/s and 35 m/s respectively. Thus, we find the maximum surges at 12 places in nearshore of Huanghe River Delta. The tests show that along the I2 track the typhoon has the most effect on the storm surges of Huanghe River Estuary.更多还原