有关黄河下游流量沿程增大的各种观点评述

Review on the opinions of the unusual longitudinal increase of flood discharges in the Lower Yellow River

对包括黄河下游“04.8”洪水在内的各场高含沙洪水异常现象的观点做了系统总结,认为已有的各种观点可以分为(1)局部沙坝和浆河、阵流类;(2)主槽冲刷类;(3)“挤压”和“积聚”类。分析总结各种观点,对于认识2004年“04.8”洪水的形成机理具有重要意义。

Similar as the hyper-concentration floods of 1973 and 1977, an abnormal phenomenon happened again in the flood of August of 2004, in which the flood peak discharge of Huayuankou station was obviously higher than the sum of the peak discharge of Xiaolangdi Station and corresponding discharges of the two tributaries. This paper tries to summarize all the studies on this phenomena as： （1） local sediment bar and mud flow or intermittent flow; （2） main channel scouring; （3）shoving or accumulating, etc. Although these studies and opinions provide very useful references to understand the intrinsic mechanism of the phenomena, none of them is able to provide the quantitative analysis and convincing explanation to its hypotheses. Therefore more studies on this phenomenon are needed.