VALIDATION THE PRODUCT OF EVAPOTRANSPIRATION (MOD16) FOR A CULTURE RICE IRRIGATED IN CACHOEIRA DO SUL – RS

Authors

  • Vanessa de Arruda Souza Universidade Federal do Rio Grande do Sul/CEPSRM
  • Débora Regina Roberti Universidade Federal de Santa Maria
  • Rita de Cássia Marques Alves Universidade Federal do Rio Grande do Sul/CEPSRM
  • Marcelo Bortoluzzi Diaz Universidade Federal de Santa Maria
  • Jônatan Dupont Tatsch Universidade Federal de Santa Maria

DOI:

https://doi.org/10.5902/2179460X20230

Keywords:

Evapotranspiration. Rice irrigated. MOD16. Brazil. Flux.

Abstract

The process of evapotranspiration (ET) is the second major component of the hydrological cycle, being connected directly with the amount of water vapor in the atmosphere. Determine the ET for large areas of irrigated rice is a limiting factor due to the high cost of equipment and skilled labor. Using data from remote sensors has been serving as an alternative technique for monitoring ET over large areas. The aim of this study is to evaluate the ET (MOD16) for a rice paddy in the Cachoeira do Sul - Brazil. The data used in this study cover the period from October 2013 to September 2014. The comparison between the ET-MODIS central pixel with the observed ET (estimated by technique Eddy Covariance) showed statistical values of RSME = 15.87, PBIAS -29.2. For the same pixels with vegetation were also extracted from the average values of ET-MODIS flow and compared with the tower, showing RSME = 14.59, PBIAS = -40.3. The biggest difference between the observed data with the MOD16 occurred during the rice cultivation that takes place between the spring/summer, not following the variability of ET.

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Author Biographies

Vanessa de Arruda Souza, Universidade Federal do Rio Grande do Sul/CEPSRM

Programa de Pós-graduação em Sensoriamento Remoto

Débora Regina Roberti, Universidade Federal de Santa Maria

Departamento de Física

Rita de Cássia Marques Alves, Universidade Federal do Rio Grande do Sul/CEPSRM

Departamento de Geodésia

Marcelo Bortoluzzi Diaz, Universidade Federal de Santa Maria

Programa de Pós-graduação em Meteorologia

Jônatan Dupont Tatsch, Universidade Federal de Santa Maria

Departamento de Física

References

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Published

2016-07-20

How to Cite

Souza, V. de A., Roberti, D. R., Alves, R. de C. M., Diaz, M. B., & Tatsch, J. D. (2016). VALIDATION THE PRODUCT OF EVAPOTRANSPIRATION (MOD16) FOR A CULTURE RICE IRRIGATED IN CACHOEIRA DO SUL – RS. Ciência E Natura, 38, 270–276. https://doi.org/10.5902/2179460X20230

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