潮流和波浪作用下悬移质挟沙能力的研究

A Study on Suspended Sediment Carrying Capacity in Combined Actions of Waves and Tidal Current

本文将湍流猝发理论用于潮流与波浪共同作用下挟沙能力的研究。基于湍流猝发的时空尺度得到波浪和潮流作用下床面泥沙上扬通量 ,然后根据连续律 ,建立了平衡近底含沙量的理论表达式。进而根据波浪掀沙和潮流输沙的模式 ,推导得出了物理概念清晰和充分考虑床面附近泥沙交换力学机理的潮流和波浪共同作用下的挟沙能力公式 ,经过黄河口实测资料的验证 ,计算与实测符合良好。

The turbulent bursting theory is applied to study sediment carrying capacity in the combined actions of waves and tidal current in this paper. Based on space-time scales of turbulent bursting，the lifting flux of bed sediment is developed. Then，a theoretical equation for the equilibrium of near- bed-concentration of suspended sediment is established from the balance between the lifting and effective sedimentation fluxes. Hereon，according to the modes of sediment lifting by waves and sediment transporting by tidal current，an formula of sediment carrying capacity is established with the clear physical concepts and the consideration of the mechanism of sediment particles exchanging near bed. By verification，the calculated results are in good agreement with the measured data of the Yellow River delta.