黄河下游平滩河槽形态与水沙搭配之关系

Relations of channel geometry to water and sediment rate for the lower Yellow River

概括总结了对黄河下游断面几何特征与水沙关系(断面河相关系)的研究现状,基于'记忆'效应提出了几何特征与前期水沙的公式,利用1969～1996年水沙资料以及1973～1996年花园口～利津河段统测断面资料进行了统计分析,建立了花园口～高村、高村～艾山、艾山～利津河段平滩几何特征与前期水沙参数的(沿程河相)关系,认为各河段断面平滩几何特征与前期(前4年)水沙搭配条件有关,前期冲淤对断面形态的影响可以通过水沙搭配来反映,边界条件对断面形态的影响可以通过水沙参数的指数来反映.

Different relations of channel geometry to water discharge and suspended sediment rate in the lower Yellow River are reviewed. An equation of relations of channel geometry to flow sediment discharge is given based on “self-reference” effect of the river response system. The average time of “self-reference” effect for channel respones is 4 years. The equations of relations of channel geometry （ i. e., channel width and average depth under bankfull flow conditions） to the latest flow situations （including water discharges and sediment concentration） for the 4 river reaches are established through statistical analysis with the Yellow River data from 1969 to 1996.