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根据老黄河口外水下三角洲海底冲蚀沟的地貌特征，用动力学方法分析了其形成发育机制．结果表明，波浪近底流是冲蚀沟形成发育的主导因素．冲蚀沟内的湍流及其次生的横向环流构成了复杂的流场，由此产生的边界切应力对冲蚀沟的侵蚀及沉积物的悬浮、扩散起重要作用．冲蚀沟的断面形态与流场结构密切相关．
According to the geomorphic characteristics of submarine eroded subaqueous deltas outside the mouth of the Yellow River Estuary, the mechanism of formation and development was analyzed by dynamic method. The results show that the wave near-inflow is the dominant factor in the formation and development of erosion ditch. Turbulence in the erosion gully and its secondary lateral circulation constitute a complex flow field, and the resulting shear stresses on the erosion of the erosion gully and sediment suspension, diffusion play an important role. The morphology of the erosion channel is closely related to the structure of the flow field.