Comparison of two canopy resistance models to estimate evapotranspiration for tea and wheat in southeast China
Comparison of two canopy resistance models to estimate evapotranspiration for tea and wheat in southeast China
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DOI：
10.1016/j.agwat.2020.106581
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发表时间：
2020-10
影响因子：
6.7
通讯作者：
Haofang Yan;Jianjun Yu;Chuan Zhang;Guoqing Wang;Songde Huang;Jiamin Ma
中科院分区：
文献类型：
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作者：
Haofang Yan;Jianjun Yu;Chuan Zhang;Guoqing Wang;Songde Huang;Jiamin Ma
实际蒸散量（λET）可以使用Penman-Monteith（PM）模型用气象参数来估计，其中冠层阻力（rc）起重要作用，但难以确定。Katerji-Perrier（KP）和Todorovic（TD）模型被广泛用于确定热膨胀系数。以中国东南部的茶园和麦田为例，比较了两种模式在时尺度和日尺度上对λ ET的模拟效果。用波文比能量平衡法（BREB）对λ ET的估算值与实测值进行了比较。结果表明，KP模型对茶叶和小麦的λ ET都有较好的模拟效果，而TD模型对小麦的λ ET都有较好的模拟效果，但对茶叶的λ ET高估了44.9%。因此，KP模型是估算两种作物λ ET的首选模型，TD模型在茶园应避免使用。
Actual evapotranspiration (λET) can be estimated with meteorological parameters using the Penman-Monteith (PM) model where the canopy resistance (rc) plays an important role but is difficult to determine. The Katerji-Perrier (KP) and Todorovic (TD) models are widely used to determine therc. A comparative study was conducted to evaluate the performances of two models, on hourly and daily scales, in simulating theλETfor a tea and a wheat field in southeast China. The estimatedλETwas compared with the measuredλETby the Bowen ratio energy balance (BREB) method. The results indicated that the KP model simulated theλETof tea and wheat well for both hourly and daily scales, while the TD model simulated theλETwell for the wheat for both time scales but significantly overestimated the teaλETby 44.9%. Therefore, the KP model was preferred to estimateλETfor both crops, the TD model should be avoided in tea fields.