黄河下游花园口-高村段水流数学模型的建立

Establishment of Current Mathematical Model: Downstream of the Yellow River from Huayuankou to Gaocun

黄河下游水流减缓,且没有大的支流汇入,选取花园口-高村段为模拟河段,采用圣维南方程组为模型方程,建立水量和水位的关系式。对于方程的求解,采用较成熟的Preissmann格式,对其进行离散后,用追赶法进行求解。对于模型方程中的关键参数糙率n,采用根据曼宁公式反算,然后在进行模型率定的方法。用花园口、夹河滩和高村测站的实测值进行计算,取得了较为理想的效果。

The flow of Yellow River downstream is slowing, and there is no large tributary falls into. The river of Huayuankou to Gaocun is selected to establish the relationship between water yield and water level by using Saint-Venant equations as model equation. For the solution of equation, adopting mature Preissmann format to discrete and using chasing method to solve equation it. For the key parameter roughness n of the model equations, adopting Manning Formula to a inverse computation, and then conducting the model calibration method. The measured values of Huayuankou, Jiahetan and Gaocun station are used to obtain an ideal result.