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天然条件下的山前季节性河流黎河被用作引滦入津的输水河道，来水条件的巨变和大量工程引起河床调整．为研究这一调整我们建立了具有如下特点的数学模型：１．考虑了自上而下床沙粒径的巨大变化；２．反映了卵石夹沙河床宽级配的输沙特点以及清水冲刷时的粗化过程；３．模拟了粘性土河床的冲刷特性；４．考虑了跌水坎的不规则断面宽顶堰的过流特点以及有工程措施和人为干扰下的河床演变特点．本文介绍了上述数学模型的主要内容．这对于其它跨流域引水工程和河道治理工程有参考价值
In the natural conditions, the piedmont, a seasonal seasonal river, is used as a waterway for water diversion from Luanhe to Tianjin. The drastic changes in water conditions and the large number of projects have caused riverbed adjustments. To study this adjustment we have established a mathematical model with the following characteristics: 1. Consider the huge changes in particle size of sand bed from top to bottom; 2. It reflects the characteristics of sediment transport along the gravel bed with gravel sand and the roughening process when the water scours; 3. Simulation of cohesive soil bed erosion characteristics; 4. Considering the overcurrent characteristics of the widened weir with irregular sections and the river bed evolution under engineering measures and man-made disturbances, This article describes the main contents of the above mathematical model. This has reference value for other inter-basin water diversion projects and river channel management projects