【摘要】 河道具有能够传递上游河势调整至下游河段的性能被称为关联性河段。利用马当水道和东流水道的实测水文地形资料，分析了各汊道的自然演变情况，并通过建立马当-东流河段的二维水动力模型，在验证的基础上，从上游河势变化和公式定量计算的角度，探讨了马当河段和东流水道的演变关联性。结果表面：马当河段的演变趋势是南兴北衰，而东流水道演变却呈交替性变化，马当水道河势调整没有向下游东流水道传递；通过疏浚、筑坝等手段改变马当圆水道分流比，对东流水道影响微小，东流水道的汊道演变由水道自身水沙运动规律所导致；马当河段与东流水道之间顺直微弯段的水流摆动力与边界约束力的比值始终小于1,顺直微弯段能有效约束水流动力轴线的摆动。更多还原

【Abstract】 The river channel has the performance of transmitting the upstream river regime adjustment to the downstream river section, which is called the relevant river section. Based on the correlation characteristics of the river reach, show that natural evolution was analyzed, and through the establishment of the Madang when the east river in the two-dimensional hydrodynamic model, on the basis of verification, and the formula to calculate the changes from the upstream, explores the horse when river and east flow correlation legal evolution. The results show that the evolution trend of the Madang channel is that the south rised and the north is declined, while the evolution of the Dongliu channel alternated, and the adjustment of the river regime of the Madang channel did not transfer to the eastern flowing water channel in the lower reaches. Changing the distributary ratio of Madang Yuan channel by means of dredging and damming has little influence on the evolution of east flowing water channel. The evolution of Dongliu channel is caused by the law of water and sediment movement. The ratio of the pendulum force and boundary force of the straight and slightly curved section between the Dongliu channel and the Dongliu channel is always less than 1, and the middle section of the two channels can effectively restrain the swing of the hydrodynamic axis.更多还原