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基于2013年4月瓯飞浅滩大范围海域的潮流和含沙量同步观测资料,运用机制分解法分析悬沙从小潮至大潮的输运特征,探讨不同水动力因子对悬沙输运的贡献率。结果表明:余流从小潮到大潮期间逐渐增加,河口区余流值最大,其次是北部岛屿区,南部海域最小。欧拉余流绝大部分方向向海,而斯托克斯余流方向向陆。单宽输水量以北部岛屿区最大,向陆输运,其次是瓯江口,向海输运,输沙量以大潮输移为主,其输沙强度和输沙方向在空间上差异明显。瓯江口和鳌江口、南部北部岛屿区和海域向海输运,而飞云江口和中部海域向陆输运。在各个输沙项中,河口区以平流输沙为主,而北部岛屿区、中部海域和南部海域以潮泵输沙为主。
Based on the synchronous observation data of tidal current and sediment concentration over a large area of the coast of Oufei Shoal in April 2013, the mechanism decomposition method was used to analyze the transport characteristics of the suspended sediment from a small tide to a tidal current, and to explore the contribution rate of different hydrodynamic factors to the suspended sediment transport . The results showed that the residual current increased gradually from the tidal tide to the tidal tide, with the largest residual current value in the estuary area, followed by the northern island area and the southern area the smallest. Eurasian surplus most of the direction to the sea, and Stokes current direction to land. The single-island water transport is the largest in the northern island region and transported to the land, followed by the Oujiang River mouth, which is transported to the sea. The main sediment transport is dominated by tidal transport, and the difference in sediment load and sediment transport direction in space is obvious. Oujiang Estuary and Aojiang Estuary, the northern northern island area and the sea to the sea transport, and Feiyun Jiangkou and the central waters to the land transport. Among all the sediment transportations, estuarine area is dominated by advection and sediment transport, while the northern island area, the central area and the southern area are dominated by tidal pumps and sand transport.