台湾海峡台风暴潮非线性数值计算

台湾海峡平均水深不大于50米,台风侵袭频繁.由于台湾岛的“墙壁效应”和台湾海峡的“狭管效应”的影响,台湾海峡的台风暴潮显得较为独特.以前,我们及其他兄弟单位对福建沿海台风暴潮的研究,大多数仅局限于单站的气-水动力相互作用的研究,很少涉及整个海峡.虽说我们也曾作过福建沿岸台风暴潮现场调查,但进行次数有限,了解的也仅是海峡西岸局部地区的情况,它仅能反映台湾海峡台风暴潮的一个侧面,而无法了解整个海峡地区的风暴潮全貌.

NON-LINEAR NUMERICAL COMPUTATIONS ON THE STORM SURGES IN THE TAIWAN STRAITS

Because of geographic circumstances storm surges in the Taiwan straits,are quite characteristic and typhoon strikes are frequent.Using crossed gries,a semi-implicit difference scheme and wind field computations based on the model of a moving typhon's wind field,non-linear numerocal computations have been made.forthe storm surges formed from the typhoons which directhy strike the Taiwan straits along three main tracks.The close correlation between computations and observations confirms the correct choice of the difference scheme stability and boundary conditions by the anchors of this paper.the paper depicts the peculiar life history of storm surges in the Jaiwan straits and dernonstrates that typhoon tracks,typhoon intensities and bottom friction have significant influence upon storm surges in this strait.