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陆面蒸发量可以根据水量平衡原理，用降水量减径流量计算得出；或者在测得或间接算出土壤含水量后用蒸发模式加以计算。本文介绍仅用降雨资料来计算攀枝花金沙江干热河谷地区陆面蒸发量的方法。1计算原理与方法蒸发的物理实质：蒸发过程需要消耗热量，还要可供蒸发的水份。当热
Land surface evaporation can be calculated on the basis of the principle of water balance using precipitation-reducing flows, or by using evaporative mode after soil moisture has been measured or indirectly measured. This paper presents a method for calculating land surface evaporation in the Jinshajiang dry-hot valley using only rainfall data. 1 Calculation principle and method The physical essence of evaporation: The evaporation process needs to consume heat, but also for the evaporation of water. When hot