【摘要】 根据实测气象资料和蒸散发量资料,对几种蒸散发量计算模式进行了对比分析,提出不同气候区计算模式的适用性。以彭曼-蒙蒂斯公式计算的蒸散发量作为参考值,得出Φ20蒸发皿换算成蒸散发能力的折算系数。分析成果对我国水文水资源计算和进行气候变化影响评价具有指导意义。更多还原

【Abstract】 Evapotranspiration plays a significant role for the redistribution of water on the earth and is a major determination variable in water cycles. A comparison among different evapotranspiration estimating approaches in humid, semi-humid, semi-arid and arid zones is made to analyze their suitability on correlation coefficients between calculated and measured evapotranspiration from Φ20 pan. If the calculated evapotranspiration by Penman-Monteith formula is used as a reference value, we can obtain the conversion coefficient of the potential evapotranspiration from the evaporation of Φ20 pan. Therefore, this analysis is not only very useful for estimation of hydrological balance and water resources, but also significant for impact study of climate changes.更多还原