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本文采用二维显式有限元方法数值模拟了温州湾内的流态及其变化，并在此基础上，根据温州湾的地形特点分析探讨了温州湾水流变化与湾内地形之间的关系。灵昆浅滩和霓屿山仰舌沙咀在水下的相向延伸，将温州湾分为南北两片，有利于温州湾联岛工程坝轴线的确定。温州湾北片是冲淤变化最活跃的地区。由于瓯江北汊落潮槽与东口涨潮槽方向并不一致，错开处发育的沙洲（中沙、腰子沙等），沙洲位置随瓯江南北汊水量分配情况而变；北口对瓯江北汊的分流，湾内盐淡水混合以及周围岛屿对风浪的屏蔽作用，使温州湾北片发育有拦门沙（刀子沙、三角沙等）。温州港的发展必须对这些沙体进行整治。
In this paper, two-dimensional explicit finite element method was used to simulate the flow pattern and its variation in Wenzhou Bay. On the basis of this, the relationship between the watertight flow in Wenzhou Bay and the in-bay terrain was analyzed based on the topographical features of Wenzhou Bay. Ling Kun shallow and Nei Yu Shan Tong Tsz Sha Tsui in the water under the extension of the Wenzhou Bay will be divided into two north and south, is conducive to Wenzhou Bay Bay Island project to determine the axis. Wenzhou Bay North is the most active areas of erosion and deposition. Due to the inconsistent direction of the tide trough in the north of Oujiang River and the tidal trough in the east of the Oujiang River, the location of the sandbank changed with the distribution of water volume in the north and south of the Oujiang River due to the sandbars (Zhongsha and Yaoxizisha) Bay salt and fresh water mixed around the island and the shielding of the storm, so that the development of the Bay of Wenzhou Bay bar sand (knife sand, triangular sand, etc.). The development of Wenzhou Port must rectify these sand bodies.