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Evapotranspiration estimates derived using thermal-based satellite remote sensing and data fusion for irrigation management in California vineyards

  • Kyle R. Knipper
  • William P. Kustas
  • Martha C. Anderson
  • Joseph G. Alfieri
  • John H. Prueger
  • Christopher R. Hain
  • Feng Gao
  • Yun Yang
  • Lynn G. McKee
  • Hector Nieto
  • Lawrence E. Hipps
  • Maria Mar Alsina
  • Luis Sanchez
Original Paper

Abstract

Irrigation in the Central Valley of California is essential for successful wine grape production. With reductions in water availability in much of California due to drought and competing water-use interests, it is important to optimize irrigation management strategies. In the current study, we investigate the utility of satellite-derived maps of evapotranspiration (ET) and the ratio of actual-to-reference ET (fRET) based on remotely sensed land-surface temperature (LST) imagery for monitoring crop water use and stress in vineyards. The Disaggregated Atmosphere Land EXchange Inverse (ALEXI/DisALEXI) surface-energy balance model, a multi-scale ET remote-sensing framework with operational capabilities, is evaluated over two Pinot noir vineyard sites in central California that are being monitored as part of the Grape Remote-Sensing Atmospheric Profile and Evapotranspiration eXperiment (GRAPEX). A data fusion approach is employed to combine ET time-series retrievals from multiple satellite platforms to generate estimates at both the high spatial (30 m) and temporal (daily) resolution required for field-scale irrigation management. Comparisons with micrometeorological data indicate reasonable model performance, with mean absolute errors of 0.6 mm day−1 in ET at the daily time step and minimal bias. Values of fRET agree well with tower observations and reflect known irrigation. Spatiotemporal analyses illustrate the ability of ALEXI/DisALEXI/data fusion package to characterize heterogeneity in ET and fRET both within a vineyard and over the surrounding landscape. These findings will inform the development of strategies for integrating ET mapping time series into operational irrigation management framework, providing actionable information regarding vineyard water use and crop stress at the field and regional scale and at daily to multi-annual time scales.

Notes

Acknowledgements

Authors would like to thank the staff of Viticulture, Chemistry and Enology Division of E&J Gallo Winery for the collection and processing of field data and insight to local irrigation practices. Authors would also like to thank the Borden vineyard staff for logistical support of GRAPEX field and research activities. USDA is an equal opportunity provider and employer.

Compliance with ethical standards

Conflict of interest

Authors report no conflicts of interest in the material presented in this study.

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Copyright information

© This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply 2018

Authors and Affiliations

  • Kyle R. Knipper
    • 1
  • William P. Kustas
    • 1
  • Martha C. Anderson
    • 1
  • Joseph G. Alfieri
    • 1
  • John H. Prueger
    • 2
  • Christopher R. Hain
    • 3
  • Feng Gao
    • 1
  • Yun Yang
    • 1
  • Lynn G. McKee
    • 1
  • Hector Nieto
    • 4
  • Lawrence E. Hipps
    • 5
  • Maria Mar Alsina
    • 6
  • Luis Sanchez
    • 6
  1. 1.Hydrology and Remote Sensing LaboratoryUSDA ARSBeltsvilleUSA
  2. 2.National Laboratory for Agriculture and the EnvironmentUSDA ARSAmesUSA
  3. 3.NASA Marshall Space Flight CenterHuntsvilleUSA
  4. 4.Institute for Food and Agricultural Research and TechnologyParc de Gardeny, Edifici FruitcentreLleidaSpain
  5. 5.Plants, Soils and Climate DepartmentUtah State UniversityLoganUSA
  6. 6.E.&J. Gallo Winery, Viticulture, Chemistry and EnologyModestoUSA

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