洋山港海域水体和悬沙输运机制研究

摘要

The long-term transport velocity of water and suspended sediment are separated, mechanism decomposition is made on them, and effects of all kinds of physical process by observed data is analyzed in Yangshan Harbor waters in this paper. The results show that, the obvious difference exists between water and suspended sediment residual transport, and it is more accurate and reasonable to calculate residual sediment transport directly. Euler transport plays predominant role in water long-term transport, and horizontal advection and tidal pumping take primary role in suspended sediment transport in the study area, while the contribution of vertical transport is small due to strong mixed tide.%对洋山港海域水体和悬沙长期输运速度分离,并进行机制分解,分析各种物理过程对水体和悬沙长期输运速度所起的作用.结果表明,水体和悬沙输运存在明显差异,直接描述悬沙净输运更准确合理;欧拉余流在水体长期输运中占主导地位,平流输运和潮泵输运是洋山港海域悬沙输运的主要动力因素,由于潮动力混合较强,垂向输运作用很小.