沉积动力学属于水文与地质的交叉学科，研究沿岸流所携带的河流泥沙输运过程对证实陆架的沉积动力机制具有重要意义。沿岸流绕过山东半岛东端时受惯性离心力及逆压梯度作用与岸线发生分离，受其影响，黄河泥沙在岸线与分离的流轴之间形成楔形泥质沉积体。世界多条河流泥沙均具有绕过海岬之后形成沉积中心的相似点（即河流泥沙的沉积体与沿岸流分离之间存在着某种联系）。针对流分离对沉积体形成的动力机制，目前尚无相关研究。本项目基于已有的三维斜圧海浪-潮汐-环流-泥沙耦合模式，设计敏感试验结合流体理论分析，研究山东半岛东端沿岸流分离/再贴岸的动力、底边界特征及演变规律，以此水动力研究为基础，探讨偏离岸线过程中底部剪切变弱的沉积效应，构建流场分解和理想试验的方案，研究流分离衍生冷暖涡的辐聚/散及其中心升降流的沉积动力机制，并分析流分离导致的锋面变化对物质扩散的阻隔及对楔形形态的塑造，以揭示黄河泥楔在沿岸流分离处形成的原因。

Sediment dynamic is an interdisciplinary of hydrology and geology. To study the sediment transport process of river sediment carried by coastal currents means much to verify the dynamic mechanism of the continental sediment. Coastal current separates from the shoreline when passing around the eastern cape of the Shandong Peninsula because of centrifugal of inertia and the adverse pressure gradient force. The sediment from the Yellow River deposits between the coastline and the flow spindle affected by the separation.Sediments from many rivers in the world are carried by the coastal currets, depolsit after passing around capes similarly. There is a correlation between terrigenous sedimentary bodies and coastal flow separation. The mechanism of flow separation on formation of sedimentary bodies has not been studied. The project based a 3D baroclinic waves-tide-circulation-sediment coupled model. Combining sensitive experiment and fluid dynamic theory, it is studied that the dynamic and bottom boundary characteristics and their variation of coastal currert separation and reattaching off the Shandong Peninsula. On the basis of the above hydrodynamic study, the deposion effect of the bottom shear stress weakening is analyzed when deviating the coastline. Flow decomposition and ideal experiments are combined to diagnose the dynamic mechanism of coastal current separation and its derivative vortex along with the central vertical current, and to analyze the blocking effect for the fronts variation to diffuse and the shaping process of the Ω deposition pattern, to reveal the reason why the Yellow River-derived wedge mud depsite where the coastal flow seperates.