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１引言位于台湾岛西南横跨海峡的台湾浅滩处的水深不足２０ｍ（图１），它对于平均水深５０ｍ的台湾海峡中的流动有明显的阻塞作用．为了了解台湾暖流在浅滩附近的变化，我们有必要对浅滩阻塞的动力学机制进行深入研究．２模型的建立考虑海峡中的定常流动．将海峡特征宽度Ｌ＝
1 INTRODUCTION Water depths in Taiwan’s shoal located across the strait in the southwestern part of Taiwan Island are less than 20 m (Figure 1). It has a significant obstruction to flow in the Taiwan Strait with an average water depth of 50 m. In order to know the change of Taiwan’s warm current near the shoal, it is necessary for us to study the dynamic mechanism of the shoal blocked. 2 The establishment of the model considers the steady flow in the Strait. The strait feature width L =