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Comparative Analysis of METRIC Model and Atmometer Methods for Estimating Actual Evapotranspiration
Joint Authors
Reyes-González, Arturo
Kjaersgaard, Jeppe
Trooien, Todd
Hay, Christopher
Ahiablame, Laurent
Source
International Journal of Agronomy
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-12-03
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
Accurate estimation of crop evapotranspiration (ET) is a key factor in agricultural water management including irrigated agriculture.
The objective of this study was to compare ET estimated from the satellite-based remote sensing METRIC model to in situ atmometer readings.
Atmometer readings were recorded from three sites in eastern South Dakota every morning between 8:15 and 8:30 AM for the duration of the 2016 growing season.
Seven corresponding clear sky images from Landsat 7 and Landsat 8 (Path 29, Row 29) were processed and used for comparison.
Three corn fields in three sites were used to compare actual evapotranspiration (ETa).
The results showed a good relationship between ETa estimated by the METRIC model (ETa-METRIC) and ETa estimated with atmometer (ETa-atm) (r2 = 0.87, index of agreement of 0.84, and RMSE = 0.65 mm day−1).
However, ETa-atm values were consistently lower than ETa-METRIC values.
The differences in daily ETa between the two methods increase with high wind speed values (>4 m s−1).
Results from this study are useful for improving irrigation water management at local and field scales.
American Psychological Association (APA)
Reyes-González, Arturo& Kjaersgaard, Jeppe& Trooien, Todd& Hay, Christopher& Ahiablame, Laurent. 2017. Comparative Analysis of METRIC Model and Atmometer Methods for Estimating Actual Evapotranspiration. International Journal of Agronomy،Vol. 2017, no. 2017, pp.1-16.
https://search.emarefa.net/detail/BIM-1157414
Modern Language Association (MLA)
Reyes-González, Arturo…[et al.]. Comparative Analysis of METRIC Model and Atmometer Methods for Estimating Actual Evapotranspiration. International Journal of Agronomy No. 2017 (2017), pp.1-16.
https://search.emarefa.net/detail/BIM-1157414
American Medical Association (AMA)
Reyes-González, Arturo& Kjaersgaard, Jeppe& Trooien, Todd& Hay, Christopher& Ahiablame, Laurent. Comparative Analysis of METRIC Model and Atmometer Methods for Estimating Actual Evapotranspiration. International Journal of Agronomy. 2017. Vol. 2017, no. 2017, pp.1-16.
https://search.emarefa.net/detail/BIM-1157414
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1157414