TY - JOUR
T1 - VALIDAÇÃO DE UM MODELO HÍBRIDO DE EVAPOTRANSPIRAÇÃO UTILIZANDO IMAGENS DE SATÉLITE E DADOS DE CHUVA-VAZÃO
AU - Bosquilia, Raoni Wainer Duarte
AU - Neale, Christopher Michael Usher
AU - Duarte, Sergio Nascimento
AU - Ferraz, Silvio Frosini De Barros
AU - Barros, Pedro Paulo Da Silva
AU - Muller-Karger, Frank Edgar
N1 - Publisher Copyright:
© 2021, Universidade Estadual Paulista - UNESP. All rights reserved.
PY - 2021/7/1
Y1 - 2021/7/1
N2 - To quantify the water balance in watersheds, it is necessary to know the components of the hydrologic cycle, especially evapotranspiration (ET). Many studies have been conducted using a single-source model such as SEBAL to estimate the actual ET (ETa) from satellite imagery; however, other models have been developed and continuously improved, such as the Two Source Energy Balance (TSEB). This study evaluated ETa estimation performed by a hybrid TSEB ET model programmed in the Spatial Evapotranspiration Modeling Interface (SETMI) using satellite imagery. The evaluation was conducted over two full hydrological years, developing a new methodology to convert hourly ETa data to monthly and annual data. The results of applying the TSEB/SETMI model to Landsat 8 imagery were validated to a water balance calculation from field measurements in three representative watersheds in Corumbataí, SP, Brazil. Thus, it was concluded that the adjustment applied to monthly and annual ET data produced results statistically correlated to those obtained through a simplified annual water balance, confirming that the developed methodology can be used to estimate monthly and annual ET from Landsat 8 imagery and the hybrid ET model.
AB - To quantify the water balance in watersheds, it is necessary to know the components of the hydrologic cycle, especially evapotranspiration (ET). Many studies have been conducted using a single-source model such as SEBAL to estimate the actual ET (ETa) from satellite imagery; however, other models have been developed and continuously improved, such as the Two Source Energy Balance (TSEB). This study evaluated ETa estimation performed by a hybrid TSEB ET model programmed in the Spatial Evapotranspiration Modeling Interface (SETMI) using satellite imagery. The evaluation was conducted over two full hydrological years, developing a new methodology to convert hourly ETa data to monthly and annual data. The results of applying the TSEB/SETMI model to Landsat 8 imagery were validated to a water balance calculation from field measurements in three representative watersheds in Corumbataí, SP, Brazil. Thus, it was concluded that the adjustment applied to monthly and annual ET data produced results statistically correlated to those obtained through a simplified annual water balance, confirming that the developed methodology can be used to estimate monthly and annual ET from Landsat 8 imagery and the hybrid ET model.
KW - Landsat 8
KW - remote sensing
KW - two source energy balance
KW - water balance
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U2 - 10.15809/irriga.2021v26n3p460-475
DO - 10.15809/irriga.2021v26n3p460-475
M3 - Article
AN - SCOPUS:85129552155
SN - 1413-7895
VL - 26
SP - 460
EP - 475
JO - IRRIGA
JF - IRRIGA
IS - 3
ER -