绳套型水位流量关系曲线拟合模型的进一步优化

Further Optimum Fitting Model of Loop Discharge Rating Curve

针对现有拟合定线方法存在过分依赖图表、模型参数求解繁杂及电算整编不便等问题,以稳定流的计算公式为基础,通过数学推演获得了可直接拟合河道受洪水涨落影响情况下的非恒定渐变流的水位流量关系方程式。实例应用结果表明,该方法能较好地拟合相应观测断面的水位流量关系,具有较好的拟合替代精度。

In view of the existing fitting method depending too much on charts,complicated for solving model parameters and inconvenient processing by computer,according to steady flow formulas,unsteady flow equation of discharge rating influenced by flood fluctuation can be directly fitted with mathematical derivation.Examples of the application results show that the proposed method can fit discharge rating of observation section and has good fitting alternative precision.