提高黄河下游输沙能力的复式河道整治方案探讨

Discussion on the multi-river-training to increase the capacity of sediment transport in the Lower Yellow River

在介绍黄河下游河道整治面临的实际问题和已采取的整治措施基础上,结合近年来下游来水来沙条件的实际变化情况,提出在已有河道整治方案基础上开展基于提高黄河下游输沙能力的复式河道整治方案以应对黄河下游泥沙淤积和不同来水过程产生的河势变化问题。通过分析黄河下游河道的断面特征,提出黄河下游存在二级主槽的新概念,并基于此理论分析确定了新河道整治方案下的主要设计参数,定性分析了输沙能力的变化趋势,为以后进一步开展河道整治提供了新的思路。

Based on the faced problems and the training measures taken for the channel training of the Lower Yellow River, a multi-fiver-training scheme is presented to increase the capacity of the sediment transport and to deal with river regime changes caused by different incoming water processes according to the recent years changes of incoming water and sediment. By analysis of the characteristics of the channal cross-sections of the Lower Yellow River, a new concept is presented that there exists a ＂secondary main channel＂ in the Lower Yellow River. Based on this theory, the main design parameters for the new training scheme and the qualitative analysis for the change tendency of sediment transport capacity together provide a new thinking way for further fiver training.