Document Type : Original Article
Authors
1 p.o.box 89165-517 Yazd,Iran mollasadra, shahidan ashraf ave. safaeia, Yazd,Iran
2 Asossiat Prf. of Yazd University
3 Yazd University
Abstract
Estimation of evapotranspiration is very essential as one of the effective factors in water resources and agriculture management. There are different methods for this task that are used according to the accuracy required in the estimation and the type of application. In this research, in order to evaluate the accuracy of the SEBS model in estimating actual evapotranspiration in the period 2015-2019, daily evapotranspiration maps for the Miankauh basin were prepared from 19 Landsat 8 satellite images for the Miankauh basin using Elvis software. Using meteorological station data, reference evapotranspiration was calculated daily using the FAO Penman Monteith method. After calculating the daily evapotranspiration for the model, potential evapotranspiration was used to evaluate the research results. The evaluation of the results obtained from the SEBS model with daily evapotranspiration data (Penman Monteith) was measured using four indices: correlation coefficient (R2), root mean square error (RMSE), mean absolute error (MAD), and Nash-Sutcliffe (NS). The values of these three indices were calculated as 0.64, 1.8, 2.4, and 0.62, respectively, which indicates the sufficient accuracy of the SEBS model for estimating real evapotranspiration in the studied area.
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