Estimación de la evapotranspiración mediante un balance de energía utilizando sensores remotos

Fermín Pascual Ramírez

Abstract


Determinar la evapotranspiración (ET) es importante en el proceso del uso y manejo del agua. Mapping Evapotranspiration at High Resolution using Internalized Calibration (METRIC) calcula la ET como un residual del balance de energía, por medio de imágenes de satélite. El objetivo fue validar el funcionamiento de METRIC para calcular la ET y estimar la efficiencia del uso del agua en el Distrito de Riego (DR) Rio Yaqui. Se utilizaron ocho imágenes de satélite Landsat (sensores TM y ETM+) y mediciones de flujos turbulentos con torres de covarianza turbulenta (Eddy Covariance - EC) en una parcela con cultivo de Trigo (Triticum aestivum) con extensión en todo el DR. La ET estimada con METRIC y la medida con EC mostraron alto grado de correspondencia, en las ocho imágenes se obtuvo una raíz cuadrada del cuadrado medio del error (RMSE) de 0.76 mm d-1, error medio absoluto (MAE) de 0.65 mm d-1, índice de acuerdo (d) de 0.93 y R2 de 0.83 en las estimaciones diarias. La metodología METRIC es una herramienta viable para estimar la variabilidad espacio-temporal de la ET y la eciencia del uso del agua.


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DOI: http://dx.doi.org/10.19136/era.a5n15.1647

ECOSISTEMAS Y RECURSOS AGROPECUARIOS(ECOSYSTEMS AND AGRICULTURAL RESOURCES), Year 5, Issue 14, September-December 2018, is a triannual journal edited, published and distributed by the Universidad Juárez Autónoma de Tabasco, Av. Universidad s/n, Zona de la Cultura, Col. Magisterial, Villahermosa, Centro, Tabasco, CP. 86040, Tel (993) 358 15 00, www.ujat.mx, era@ujat.mx., era@ujat.mx. Editor-in-chief: Efraín de la Cruz Lázaro. Copyright No. 04-2013-120514213600-203, ISSN: 2007-901X, both granted by the Instituto Nacional del Derecho de Autor (National Institute of Copyright), with certificate of title and content No. 16540 granted by the Secretaría de Gobernación(Ministry of the Interior). Individual responsible for the last update of this issue was journal Editorial Assistant Lic. Misael Hernández Martínez, Av. Universidad s/n, Zona de la Cultura, Col. Magisterial, Vhsa, Centro, Tabasco, Mex. C.P. 86040; date of last modification, September 1, 2018.

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