| Land reclamation has played a significant role in the harbor and urban development in many parts of the world. In north China, government is planning and implementing a large-scale reclamation project in a tidal flat named Caofeidian, located in the northwest coast of Bohai Sea. The total area of the reclamation reaches 310 square kilometers, and the project will be finished in 2020. In this paper, a 2-D hydrodynamic numerical model of the whole Bohai Sea was developed to study the variation of hydrodynamic conditions around the concerned area at different stages of the reclamation. The model was calibrated and validated with the available field data and the impact of the first stage and final reclamation on the shoal and deep trough in Caofeidian was analyzed.The tidal current field in Caofeidian is complicated, it is necessarily to study the tidal current and sediment when reclamation. A depth-averaged finite element hydrodynamic Bohai Sea Model has been established which can directly simulate many several-meters piers in a domain about 85.7 thousand square kilometers. The grid can be discretionary refined as a non-structure triangle or regular rectangle so that piers can be treated as one or several impermeable elements.The results show that the computational results of the stations are in good agreement with the field data. It can be drawn that the numerical model is reasonable and can be applied to study the tidal current in Bohai Sea.After reclamation, The comparison shows that: there is not any influence in the whole hydrodynamic condition in Caofeidian. The velocity will decrease slightly in the trough, but will increase near the shoreline. This means that the seabed near the shore may be eroded and the trough may be silted slightly. But the erosion and sedimentation is equation for hundreds of years, the stability can be retained with its own engineering measures.
|
PDF Full Text Request