Abstract: At present, much attention is paid to the demonstration and forecasting before project construction, while the follow-up observations and analysis after the construction are less focused. Through analyzing the tidal current and sediment characteristics, we probed into the causes of deposition in Zhenhai harbor after large-scale reclamation based on full and accurate measured data. The contributions of various affecting factors to the deposition were identified, and the mechanism of deposition in the pool of Waiyou mountain was explained. Results indicate that the large-scale reclamation activity in the surrounding areas of the harbor and the local areas of Waiyou mountain, which have remarkably reduced the effect of projecting rock, is the main causes of continuous deposition of the pool.

Key words: human activity, coastal harbor, deposition, reclamation