温州瓯飞浅滩及其附近海域枯季悬沙输运机制研究

发布时间：2018-09-11 17:59

【摘要】：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。
[Abstract]:Based on the synchronous observation data of tidal current and sediment concentration in the large area of oufei shoal in April 2013, the mechanism decomposition method is used to analyze the transport characteristics of suspended sediment from small tide to spring tide, and the contribution rate of different hydrodynamic factors to suspended sediment transport is discussed. The results show that the residual current increases gradually during the period from the small tide to the spring tide, and the residual current value in the estuary is the largest, followed by the northern island area and the southern sea area. Most of the Euler's residual currents are to the sea, while the Stokes' flows are to the land. The single wide water transport is the largest in the northern island area, followed by the Oujiang Estuary and the sea, and the sediment transport is dominated by the spring tide transport. The intensity of sediment transport and the direction of sediment transport are obviously different in space. The Oujiang Estuary and the Aojiang Estuary, the northern islands and the sea area are transported to the sea, while the Feiyun River Estuary and the central sea area are transported to the land. Among the various sediment transport items, advection sediment transport is dominant in the estuary, and tidal pump is the main sediment transport in the northern island area, the central sea area and the southern sea area.
【作者单位】：浙江省水利河口研究院;
【基金】：国家自然科学基金项目(41406101) 浙江省科技厅科研院所专项(2017F30008) 浙江省自然科学基金项目(LQ16E090004) 浙江省科技计划项目(2016F50019,2016F50017) 浙江省水利科技计划项目(RC1528,RC1319)
【分类号】：TV148

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