Analysis on flow field in nearby waterways after Tiaozini reclamation construction in Jiangsu Province

In order to predict the impact of Tiaozini reclamation construction on the marine environment,we established a two-dimensional tidal current mathematical model using Mike 21 software.The comparative analysis on changes of flow field and tidal flux in the main watercourse(Xiyang,Tiaoyugang and Waiwangjiacao) nearby Tiaozini sandbank before and after implementation of the reclamation project was conducted.The results showed that after the reclamation,the flow velocity in three waterways decreased during the flooding and ebbing tides,in which,the flow velocity in Xiyang waterway changed the most;the lateral flow was discovered in front of the reclamation dam,and the north and south flow trended to convergence and divergence in the east side of the dam.The tidal flux in Xiyang and Tiaoyugang waterways decreased obviously as a result of influence from the project.The dynamic environment in the east side of dam changes obviously,which may cause terrain erosion and deposition variation.