Evaluation of thermal remote sensing indices to estimate crop evapotranspiration coefficients

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• 作者：Emily G. Kullberg^a ; ^b ; Kendall C. DeJonge^c ; ^{Kendall.DeJonge@ars.usda.gov} ; José ; L. Chá ; vez^a
• 关键词：DACT ; degrees above canopy threshold (° ; C) ; DANS ; degrees above non-stressed canopy (° ; C) ; Dr ; root zone depletion or soil water deficit (mm) ; DP ; deep percolation (mm) ; ET ; evapotranspiration (mm/day) ; ETc ; crop evapotranspiration (mm/day) ; ETr ; alfalfa-based reference evapotranspiration (mm/day) ; fc ; fractional vegetation cover ; GW ; ground water input (mm) ; I ; total net irrigation amount applied (mm) ; IRT ; infrared thermometer (° ; C) ; Kc ; crop coefficient ; Kcb ; basal crop coefficient
• 刊名：Agricultural Water Management
• 出版年：2017
• 出版时间：1 January 2017
• 年：2017
• 卷：179
• 期：Complete
• 页码：64-73
• 全文大小：1008 K
• 卷排序：179

文摘

Remote sensing techniques can quantify evapotranspiration of crops. Three methods are compared to determine the basal crop coefficient. Four thermal methods are used to determine the stress coefficient. Thermal indices DANS and DACT are calibrated to rescale to the stress coefficient. Stress detection methods that require less inputs are responsive to water stress.