河北省平原区20m~2水面蒸发池与不同型号蒸发器折算系数分析

世界气象组织仪器和观测方法委员会提出以20m2水面蒸发池作为水面蒸发量的临时国际标准。根据衡水实验站多年水面蒸发量观测资料,建立了20m2水面蒸发池与E-601型蒸发器和20cm口径蒸发皿观测值的相关关系,并计算出各月的折算系数,并对折算系数变化特征进行分析。在工程设计计算中,可利用其他型号蒸发器(皿)长期观测资料,换算成20m2水面蒸发池的蒸发量,使水面蒸发资料更接近于天然水体的蒸发量,为水资源评价、水量平衡计算提供科学依据。

Conversion Coefficient Analysis of 20m~2 Evaporation Pond and Other Evaporators for Hebei Plain

WMO Instruments and Observation Method Committee put forward that 20m2 evaporation pond should be taken as the temporary international standard of water surface evaporation.Based on the observed data of water surface evaporation at the Hengshui Experiment Station,we built up the correlation among 20m2 evaporation pond,E601 evaporator and 20cm evaporating dish,then calculated the conversion coefficients of various months,and analyzed the variation characteristics of conversion coefficients.Finally,in engineering design calculations,we can make use of long-term observed data of other evaporators and convert evaporation of 20m2 evaporation pond,which makes the water surface evaporation data closer to the evaporation of natural water bodies.