Inter-comparison of the Penman-Monteith type model in modeling the evapotranspiration and its components in an orchard plantation of Southwest China

文献类型： 外文期刊

第一作者： Cui, Ningbo

作者： Cui, Ningbo;He, Ziling;Jiang, Shouzheng;Wang, Mingjun;Yu, Xiuyun;Zhao, Lu;Cui, Ningbo;He, Ziling;Jiang, Shouzheng;Wang, Mingjun;Yu, Xiuyun;Zhao, Lu;Qiu, Rangjian;Gong, Daozhi;Wang, Yaosheng;Feng, Yu;Jiang, Shouzheng

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关键词： Orchard water loss; Canopy transpiration; Soil evaporation; Resistance parameters; Sensitivity analysis

期刊名称：AGRICULTURAL WATER MANAGEMENT （ 影响因子：6.7； 五年影响因子：6.6 ）

ISSN： 0378-3774

年卷期： 2023 年 289 卷

页码：

收录情况： SCI

摘要： Crop evapotranspiration (ET) along with its components (canopy transpiration (T) and soil evaporation (E)) estimates are crucial for agroecosystem hydrological process research and developing agricultural water-saving strategies. An inter-comparison of the Penman-Monteith type model, including Penman-Monteith (PM), Shuttleworth-Wallace (S-W), Two-Patch (T-P) and topography- and vegetation-based surface energy partitioning algorithm (TVET), Clumping (CL) and developed Two patch-Two layer (T-T) model was conducted to estimate ET and its components in a kiwifruit orchard. Results showed that all models can well capture the pattern of eddy covariance-based hourly ET (ETEC), with a slope of 0.82-1.10, R2 of 0.78-0.83, and RMSE of 0.039-0.049 mm 0.5 h-1, and yield relatively reliable estimates validated by sap flow-based hourly T, with a slope of 0.93-1.16, R2 of 0.72-0.79, and RMSE 0.017-0.026 mm 0.5 h-1. All the P-M type models agreed well with the daily ETEC, with a slope of 0.88-1.21, R2 of 0.82-0.86, and RMSE of 0.55-0.88 mm d-1, respectively. S-W overestimated actual ET due to overestimation in both T and E, T-P and TVET models overestimated T but underestimated actual E as they ignored the soil contribution under the canopy. T-T model outperformed other models in daily ET, T, and E estimates, with R2 of 0.86, 0.73 and 0.73, and RMSE of 0.56, 0.39 and 0.46 mm d-1, respectively. The output ET and T of the different P-M type models were most sensitive to canopy resistance (rsc), while E is most sensitive to aerodynamic resistance between substrate and crop canopy. Net radiation was the most crucial meteorological factor affecting ET, T and E, as it directly participated in the energy balance calculation. The output T was sensitive to air temperature since it affected rsc, while E was relatively sensitive to soil water content since it greatly changed soil surface resistance.

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