黄河下游斜河现象成因及研究进展

Progress of Study on Diagonal River in the Lower Yellow River and its Causes of Formation

在回顾黄河下游斜河研究进展的基础上,对斜河产生的原因及斜河研究中应注意的问题进行了分析,结果表明:黄河下游河床边界土质松散、二级悬河的存在、洪水骤变、整治工程与来水来沙不匹配是斜河产生的主要原因;当前应着重对斜河多发河段水沙输移特性、斜河现象与水沙条件变异之间的链式响应机理及斜河数值模拟进行研究。

Based on reviewing the research progress of diagonal rivers,the causes of formation of diagonal rivers and the problems which should be noted in the researches are analyzed.The results show that the loose soil on the river bed,the secondary suspended river,the sharp variation of flood discharge and the unmatched river regulation projects are the main causes of the diagonal river phenomena in the lower Yellow River.This paper also presents that the current researches should focus on the water and sediment transport characteristics in diagonal rivers,the chain response relationships between diagonal rivers and variations of water and sediment processes,and the numerical simulations of diagonal rivers.