复杂滩群分汊航道演变与整治——以乌江郭母子为例

Evolution and regulation of complex shoals of braided river—case studied of Guomuzi Beach,Wujiang River

从水沙运动和河道演变的关系研究了乌江郭母子滩碍航机理与航道整治。通过比较不同方案的物理模型试验结果,优化了整治措施。研究发现,河道形态的演化过程遵循平衡态的最大熵原理和非平衡态的最小熵增加率原理,用能量语言描述就是最小的水流功率损失,航道整治的实质是用工程措施改变能量在空间上分配的过程。

Based on the relations between the sediment transport and the river channel evolution,the obstructing navigation mechanism and waterway regulation of Guomuzi Beach,Wujiang River was studied with the physical experiment model.The results show that the evolutional processes of channel morphology observe the principles of maximum entropy in equilibrium state and minimum entropy production rate in non-equilibrium state,in energy words,it is the minimum energy dissipation rate.The waterway regulation is the process to change the energy distribution in space to make the river channel evolution satisfy some designed objects.