基于床面阻力划分的沙波波高模型研究

Research On Sand Wave Height Model Based on the Bed Resistances Classification

针对沙波波高计算的问题,采用了一种更符合冲积河流当中水沙运动的机理的床面阻力划分方法,通过能量守恒方程建立数学模型分析得出沙波波高与背水面边界层分离区域长度的关系,结合了前人对边界层分离区域长度的研究,得出一种波高的计算方法。将实验和野外测量数据代入公式验证并与各家代表公式对比,发现该方法适用于各种沙波形态,并具有较高精度。

A better method to classify the resistances of bed in alluvial river was adopted to solve the problem of sand wave height prediction,by which a new relationship between bed form height and separation zone length in the lee side of sand wave was proposed via the analysis of mathematical model established by using energy conservation equation. Consequently,a new method to predict the bed form height was obtained by combining the former research achievement in separation zone length. The comparison of the measurements and calculations with the results of different methods showed that the present method has a relative higher accuracy.