Mapping daily evapotranspiration over a mediterranean vineyard watershed

Mauricio Galleguillos, Frédéric Jacob, Laurent Prévot, Philippe Lagacherie, Shunlin Liang

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Daily evapotranspiration (ET) was mapped and validated at the regional extent over a vineyard landscape. The mapping was performed using the simplified surface energy balance index (S-SEBI) model, along with an Advanced Spaceborne Thermal Emission and Reflection Radiometer imagery, over two growth cycles. The validation exercise was conducted within a Mediterranean vineyard watershed, over seven sites that differed in canopy, soil, and water conditions. Despite the use of a very simple model over a complex row-structured landscape, the obtained accuracy (0.8 mm/day) was similar to those reported over simpler canopies with full covers, and corresponded to requirements for further applications in agronomy and hydrology, where daily ET can be assimilated into land surface models for calibration and control purposes. An analysis of the validation results suggested that, among the possible factors that could affect S-SEBI performances (spatial variability, vine water status, soil type and color, and row orientation), the first-order influence was row orientation.

Original languageEnglish
Article number5540262
Pages (from-to)168-172
Number of pages5
JournalIEEE Geoscience and Remote Sensing Letters
Volume8
Issue number1
DOIs
StatePublished - Jan 2011

Keywords

  • Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER)
  • HYDRUS-1D
  • daily evapotranspiration (ET)
  • simplified surface energy balance index (S-SEBI)
  • vineyard watershed

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