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本文在Penman Monteith公式的基础上 ,推导出能解析计算冠层蒸腾和土壤蒸发的双源模型 ,使之能广泛用于农田蒸腾和蒸发的计算 .采用玉米田波文比—能量平衡 (BREB)观测资料对模型进行检验 ,模拟的蒸散量与BREB的结果相当一致 .模型主要参数对蒸散的敏感性分析表明 ,这些参数变化± 2 0 %时 ,蒸散的响应小于± 7% .
Based on the Penman Monteith formula, a dual-source model that can calculate and calculate canopy transpiration and soil evaporation is deduced, which can be widely used in the calculation of farmland transpiration and evaporation.Bowne ratio-energy balance (BREB) The model is verified by the model and the simulated evapotranspiration is quite consistent with that of BREB.The sensitivity analysis of the main parameters of the model to evapotranspiration shows that the response of evapotranspiration is less than ± 7% when these parameters vary by ± 20%.