要谈河道整治与防洪的关系,首先要从河势演变说起。黄河下游河势的演变过程,亦即水流与河床相互作用的过程。水流方面起决定性作用的是环流结构,其次是水流的惯性;而河床方面则取决于滩岸边界条件的抗冲性能。不同的水流及边界条件可以引起不同的河势变化,即使是水流条件相同而边界条件不同,或者是边界条件相同而水流条件不同,则仍然可以引 To talk about the relationship between river regulation and flood control, we must start with the evolution of the river. The evolution of the river’s lower reaches of the Yellow River, that is, the interaction between water flow and the riverbed. Flow plays a decisive role in the circulation structure, followed by the inertia of the water flow; while the riverbed depends on the beach-bank boundary conditions of the impact resistance. Different water currents and boundary conditions can cause different river regime changes. Even if the flow conditions are the same and the boundary conditions are different, or the boundary conditions are the same and the flow conditions are different,