When a land area is established on top of soft ground on a coast and an estuary though reclamation, the reclamation is carried out by dropping gravel and rubble in order to improve the efficiency in the movement of equipment and the work being done. There is a difficulty with regard to final closing work in the closing section due to the occurrence of scouring. This is because the closing work is carried out with an increased flow velocity as a significant difference in water level occurs during the tidal embankment construction work for developing the inner side of the embankment by blocking seawater. In this study, the distribution of layer velocity and particle tracking according to the phased closing work with the high water level (DL(+)9.17 m) as the normal tidal condition were carried out. In addition, the flow velocity field was cross-correlated through the numerical simulation and hydraulic model test. When the tidal embankment was constructed using the combined deep and high critical method through the experiment, an increase in the flow velocity occurred in the closing section as the closing width became narrower. The flow velocity decreased due to a decrease in the cross sectional area of flow within 20 m of the closing width. The layer velocity reached a maximum near the bottom layer due to the installation of a sill and reached a minimum in the middle layer.

当通过开垦在海岸和河口的软土地上建立陆地区域时，通过放下碎石和碎石进行开垦，以提高设备移动和完成工作的效率。由于出现精练，在关闭部分进行最终关闭工作存在困难。这是因为在潮汐路堤施工作业中，通过阻塞海水来展开路堤内侧的过程中，由于水位的差异较大，因此封闭作业以增加的流速进行。在这项研究中，根据高潮位（DL（+）9.17 m）作为正常潮汐条件的分阶段关闭工作，进行了层速度的分布和颗粒跟踪。此外，通过数值模拟和水力模型试验，将流速场相互关联。当通过实验采用深高临界组合方法建造潮汐路堤时，随着封闭宽度的变窄，封闭区域的流速增加。由于在关闭宽度的20 m之内的流动截面积的减小，流速降低。由于门槛的安装，层速度在底层附近达到最大值，而在中间层达到最小值。由于在闭合宽度的20m内的流动的横截面积的减小，流速降低。由于门槛的安装，层速度在底层附近达到最大值，而在中间层达到最小值。由于在关闭宽度的20 m之内的流动截面积的减小，流速降低。由于门槛的安装，层速度在底层附近达到最大值，而在中间层达到最小值。