ADI method is adopted to establish a two-dimensional tidal current numerical model for Beilun Harbor based on the hydrologic data and sediment data. The current conditions of the site where the second stage project is going to be carried out are described. The analysis and calculations for the deposition and erosion in the harbor basin are performed, which provides references for the construction of the harbor. The effect of the pile group on the current is simulated by increasing the sea bed roughness which can be determined with empirical equations of artificial roughness. The method is considered to be applicable after verification with field data. The test has provided experiences for future mathematical modelling to simulate the open type hydraulic structures.
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