中文摘要：

曹妃甸是渤海唯一不需要开挖航道和港池即可建设30万t级大型泊位的天然港址．该深水大港滩槽及潮沟为一个整体，自然条件下能否长期稳定是关注的焦点，只有稳定才能建港．本文简述了曹妃甸近岸海区地貌及水沙运动特征，从海岸体系的形成发育过程出发，分析了滩槽长期稳定性的变化趋势．近期接岸大堤、港区围填与码头建设等工程效应的分析表明，甸头前沿深槽以冲刷为主，规划方案实施两至三年后工程引起的甸头前沿海床冲淤基本达到平衡状态．

英文摘要：

Caofeidian sea area is the only waterway and harbor basin suitable for building a large-sized berth of 300 000 tons without excavation in Bohai Bay. In Caofeidian harbor area, the stability of the coastal system consisting of shoals and inlets under natural conditions is a key point. The harbor could be developed only if the coastal system is stable. The characteristics of waves, tidal currents, sedimentation and seabed evolution in the Caofeidian near-shore area is briefly described, and the trend of stability of shoals and channels is predicted based on the research on the formation of the coastal system. Engineering effect of some projects is studied such as the dam linking the Caofeidian island and the coastline, the shoal reclamation and the construction of ore terminals. The analysis results show that the deposition and erosion of the sea bed in front of Caofeidian foreland will reach its equilibrium 2-3 years after the construction.