黄河下游河床演变规律及对接冲刷分析

Analysis on Bed Evolution Law and Joint Scouring of the Lower Yellow River

在总结以往经验和成果的基础上,指出黄河下游河床演变遵循着溯源冲刷与溯源淤积、沿程冲刷与沿程淤积两类基本的矛盾运动规律,演绎出河道淤积、河道冲刷以及冲淤动态平衡3类结果;黄河下游河床不断抬升的根源在于溯源淤积和沿程淤积的共同作用。据此,提出了沿程冲刷和溯源冲刷对接的基本原理,并以艾山断面为例,对对接冲刷动力注入点的布局及其动力源进行了系统分析。

The paper points out two basic inconsistent law of motion of backscour and backward deposition and linear scour and linear deposition followed by bed evolution of the lower Yellow River and deducts 3 categories outcome of channel deposition,channel scouring and dynamic balance of scour and silting and;the origin of river bed continuously raising of the lower Yellow River is the combined action of backward deposition and linear deposition summarized based on former experiences and outcomes.Thus,it puts forward the basic principle of joint linear scour and backscour and analyzes the layout of dynamic injection point and its dynamic source of joint scouring systemically by taking Aishan Section as an example.