宁波镇海港区淤积机理及影响因素分析

Mechanism and Affecting Factors of Deposition in Zhenhai Harbor under Human Activity

目前重视工程前期的论证预测,而对工程后续的观测分析较少。以宁波港镇海港区为例,借助翔实的实测资料,通过镇海沿岸潮流、泥沙特性分析,对大规模围涂后宁波港镇海港区的淤积原因进行了深入分析。区分了不同因素对港区淤积贡献的大小,从而合理解释外游山深潭的淤积机理。分析结果表明:周边规模较大的围涂和外游山局部围涂使其矶头效应显著削弱,是造成该深潭持续淤积的主要原因。

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 at 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 cause of continuous deposition of the pool.