P-M公式与双源蒸散发模型在淮河流域上游地区的适用性及对比研究

为定量分析P-M公式和双源蒸散发模型在淮河流域上游地区的适用性及计算精度，将双源蒸散发模型及P-M公式计算得到的蒸散发量与流域内息县水文站实测蒸发皿蒸发量的相关性进行对比分析，并定量分析不同蒸散发输入对水文模拟精度的影响。研究结果表明，双源蒸散发模型计算值与实测值的相关性及其水文模拟精度更高，更适于淮河流域上游地区蒸散发计算。研究成果可为淮河流域上游无资料地区的水文模拟和蒸散发计算提供参考。

Applicability and Comparison of P-M Formula and Dual-source Evapotranspiration Model in Upstream of Huaihe River Basin

The applicability and calculation accuracy of two different evapotranspiration models were quantitatively analyzed in the upstream of the Huaihe River Basin. The calculated evapotranspiration by the dual-source evapotranspiration model and P-M formula was compared with the measured pan evaporation of the Xixian hydrological station. In addition, the impacts of different evapotranspiration input on the accuracy of hydrological model were studied. The results show that the dual-source evapotranspiration model which has a higher correlation coefficient between the calculated evapotranspiration with the measured pan evaporation and better hydrological simulation accuracy, was suitable for the evapotranspiration calculation in the upstream of the Huaihe River Basin. The research can provide reference for hydrological simulation and evapotranspiration calculation in no-data area of the upstream of the Huaihe River Basin.