A field experiment was performed to evaluate the Mapping Evapotranspiration at High Resolution using Internalized Calibration (METRIC) model that was used for mapping surface energy balance (SEB) components (net radiation (Rn_i), soil heat flux (G_i), sensible heat flux (H_i), and latent heat flux (LE_i)) at times of Landsat satellite overpasses in conjunction with the actual evapotranspiration (ETa) and crop coefficient (Kc) for a superintensive, drip-irrigated olive (Olea europeae L. cv Arbequina) orchard. The orchard is located in the Pencahue Valley, Maule Region, Chile (35 23' LS; 71 44' LW; 96 m above sea level), and the study was conducted on an experimental plot of 21.1 ha during the 2011/2012 and 2012/2013 growing seasons. Model performance was evaluated using measurements of LE_i, ETa and Kc that were obtained from an eddy covariance (EC) system. Olive-specific functions for estimating aerodynamic roughness (z_om), leaf area index (LAI), and G_i were employed in the METRIC algorithm. In addition, submodels of Rn_i and G_i were evaluated via ground-truth measurements from a Fritchen-type net radiometer and soil flux plates, respectively. The results indicated that the errors within the METRIC model for the SEB components were between 2% and 5% of the observed values, while those for ETa and Kc were between 4% and 6% of the EC values. In addition, both the root mean square error (RMSE) and mean absolute error (MAE) for the SEB components were less than 46 W∙m⁻² at the times of satellite overpass. The RMSE and MAE values for the 24-h ETa were 0.42 and 0.31 mm·day⁻¹, respectively, while the corresponding values for Kc were 0.09 and 0.02, respectively. The coefficients of variation (CVs) for the SEB components, ETa and Kc were less than 15%, and the largest intraorchard spatial variability occurred for LE_i and, thus, ETa. The errors and uncertainties in the SEB and ETa estimates were small enough to warrant application of the METRIC model with olive-specific functions for z_om, LAI and G_i to superintensive drip-irrigated olive orchards.

使用内部校准（METRIC）模型进行了野外实验，以评估高分辨率的蒸散量，该模型用于绘制表面能量平衡（SEB）分量（净辐射（Rn _i），土壤热通量（G _i），显热Landsat卫星越过时的通量（H _i）和潜热通量（LE _i））与超高强度滴灌橄榄（Olea europeae的实际蒸散量（ETa）和作物系数（Kc）一起L. cv Arbequina）果园。该果园位于智利毛勒地区的彭卡休谷（35 23'LS; 71 44'LW;海拔96 m），该研究是在2011/2012和2012年的21.1公顷实验地上进行的/ 2013生长季节。使用从涡动协方差（EC）系统获得的LE _i，ETa和Kc的测量值评估模型性能。在METRIC算法中采用了橄榄特有的函数来估算空气动力学粗糙度（z _om），叶面积指数（LAI）和_Gi。此外，Rn _i和G _i的子模型分别通过Fritchen型净辐射计和土壤通量板的地表测量来评估。结果表明，METRIC模型中SEB组件的误差在观测值的2％至5％之间，而ETa和Kc的误差在EC值的4％至6％之间。另外，在卫星越过时，SEB分量的均方根误差（RMSE）和平均绝对误差（MAE）均小于46 W·m ^-2。24h ETa的RMSE和MAE值分别为0.42和0.31 mm·day ^-1，而Kc的相应值分别为0.09和0.02。SEB成分，ETa和Kc的变异系数（CV）小于15％，LE的果园内空间变异最大_我，因此，ETa。SEB和ETa估算中的误差和不确定性很小，足以保证将具有针对_om，LAI和_Gi的橄榄特有功能的METRIC模型应用于超高强度滴灌橄榄园。