蒸发皿系数K_P计算方法研究

Research on Calculation Method of Evaporation Pan Coefficient (K_P)

应用指标回归法和定性(风速和相对湿度)定量(吹程)资料,建立了蒸发皿系数KP计算方程,并用黄河下游引黄灌区48个观测站实测资料进行了验证计算。计算结果表明,应用该方程,可大大改善KP值的计算精度。

Evaporation is an important factor of the hydrologic cycle.Its accurate estimation is necessary for many hydrology studies.An equation for predicting K P was developed using the indicator regression approach with both categorical(wind speed and relative humidity)and quantitative(fetch length)data.The verification shows that the predicted K P values by developed equation are better than the existing equations.