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.     

厦门西港潮汐潮流的数值计算

厦门西港是一个内海港,其海水运动的主要形式是潮流。根据实测资料分析所知,厦门西港是正规半日潮性质的海区。本文着重讨论厦门西港半日分潮的数值模拟结果,其可用于研究污染物在半日分潮流作用下的稀释扩散规律和泥沙回淤规律等,并且可以了解港区潮汐潮流的概况,对于海港工程也有一定的参考价值。一、运动方程和连续方程采用直角坐标系,XOY平面与平均海面重合,X、Y轴分别与地理坐标E、N交角为35度,Z轴向上,Y轴与水边界平行。     

NONLINEAR NUMERICAL COMPUTATIONS ON STORM SURGES OF THE TAIWAN STRAIT

In order to make up well a complete picture of storm surges in the area of theTaiwan Strait, to find out and further study the formation mechanism and regularity ofstorm surges of this strait, nonlinear numerical computations have been made on thestorm surges formed by typhoon which directly hit the area along three main tracks. Inaccordance with the current field of shallow-sea storm surges with the characteristics of"boundary layer" current field, the finite difference technique is adopted on the basis ofthe whole current equations of storm surges, and the anticipated results are obtained.