不平衡输沙含沙量垂线分布公式研究

Non-equilibrium vertical distribution formula of suspended sediment concentration

不平衡输沙过程伴随着含沙量垂线分布的调整,韩其为较早提出了不平衡输沙含沙量垂线分布公式,但由于引入了三个未知参数,使公式的应用受到较大限制。通过数学变换简化了其公式,使未知参数由三个减少为两个,并探讨了所得公式的适用范围,含沙量均匀分布的条件,各因素对含沙量垂线分布曲线形态的影响。提出了检验不平衡输沙含沙量垂线分布公式合理性的方法,分别从定性和定量两个角度进行了检验。

The vertical profiles of suspended sediment concentration are usually adjusted in the non-equilibrium sediment transport process. The non-equilibrium vertical distribution formulas of sediment concentration were proposed by Han earlier. However, three unknown parameters were introduced and the practicability were limited. The formula was simplified by mathematical transformation, and the unknown parameters were reduced from three to two. The applicability range of the formula, the conditions for uniform distribution of sediment concentration, and the influences of various factors on the shape of vertical distribution curve were discussed. The methods to test the rationality of the non-equilibrium vertical distribution formula were put forward, and then the formula was tested from qualitative and quantitative respectively.