废黄河口海域悬沙输运特征

Sediment Transportation in the Abandoned Yellow River Delta

基于在废黄河口海域观测数据(包括流速、流向和悬浮泥沙浓度的垂向剖面),利用瞬时物质输运分解法估算了各站位的余流、单宽净输水量和悬沙单宽净通量以及潮流输沙各影响项的贡献。结果表明:该域潮流类型属正规半日浅海潮流,潮流运动形式以往复流为主,潮流输沙主要影响项为平均流输沙项,各测站净输沙方向与余流方向分布规律较为一致,近岸水域净输沙方向主要为偏南向,离岸水域净输沙方向主要为偏北向。

Based on the observational data of the abandoned Yellow River Delta,including the flow velocity,flow direction and the vertical profile of the suspended sediment concentration,the instantaneous material transport decomposition method was used to estimate the contribution of residual current,net carrying capacity and suspended sediment flux per unit width,and tidal sediment transport.The results show that the tidal current type is the regular half-day shallow sea tide and the movement form is dominated by reversing current.The main factors of tidal sediment transport are T1 and T2.The direction distribution of net sediment transport is consistent with residual current.The net sediment transport direction in near shore waters is mainly southerly,while the direction in offshore waters is mainly northward.