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该文应用水量平衡法和波文比－能量平衡法，研究得出刺槐和油松林土面蒸发、蒸腾、林冠截留蒸发的季节变化规律，耗水各分量的比例关系．耗水各分量占总耗水量的比例：林木蒸腾量为５７．７％～６０．２％，林地土面蒸发量为１３．２％～２２．８％，林冠截留量为１７．０％～２８．２％．其中６，７，８三月的蒸腾耗水量占全年的８０％．不同林分生长季耗水量有差异，其规律为：其它条件相同时，丰水年，阴坡耗水大于阳坡；少水年，阴坡耗水稍大于阳坡；密度大的林分耗水量也大．
In this paper, the seasonal variations of soil evaporation, transpiration and canopy interception evaporation of Robinia pseudoacacia and Pinus tabulaeformis were studied using the water balance method and the Bowen ratio-energy balance method. The ratio of water consumption to total water consumption: the transpiration rate of forest was 57.7% -60.2%, the soil evaporation of forest land was 13.2% -22.8%, the canopy interception was 17.0% 28.2%. Among them, the transpiration water consumption in March, June, July and August accounted for 80% of the whole year. The water consumption of different stand growth season is different, the law is: the other conditions are the same, wet years, shady water consumption is greater than the sunny slope; less water years, shady slope water consumption slightly larger than the sunny slope; Water is also large.