Articles
Quantification of olive tree evapotranspiration using an optical-microwave scintillometer and SEBAL model in semi-arid region
Article number
1422_22
Pages
175 – 182
Language
English
Abstract
Accurate assessment of sensible (H) and latent (LE) heat fluxes, and evapotranspiration plays a crucial role in understanding the energy balance at the interface biosphere-atmosphere and in improving the agricultural water management.
While the eddy covariance (EC) method has been widely used for these measurements, it has limitations in providing spatial representativeness beyond a few hundred meters.
To overcome this limitation, optical-microwave scintillometers (OMS) have emerged as a valuable tool capable of directly measuring kilometer-scale H and LE fluxes.
These measurements can be used to validate satellite remote sensing products and model simulations, such as the surface energy balance algorithm for land (SEBAL). In this research, the OMS measurements were used to evaluate the fluxes simulated by SEBAL model at the Agdal olive orchard situated near Marrakech city, from May 2022 to date.
The results indicated that the sensible heat fluxes estimated by SEBAL were 3% higher than OMS, while the latent heat fluxes were approximately 13% higher.
In light of these findings, we concluded that the OMS can be fairly used to validate satellite driven surface energy balance models for supporting agricultural water management.
While the eddy covariance (EC) method has been widely used for these measurements, it has limitations in providing spatial representativeness beyond a few hundred meters.
To overcome this limitation, optical-microwave scintillometers (OMS) have emerged as a valuable tool capable of directly measuring kilometer-scale H and LE fluxes.
These measurements can be used to validate satellite remote sensing products and model simulations, such as the surface energy balance algorithm for land (SEBAL). In this research, the OMS measurements were used to evaluate the fluxes simulated by SEBAL model at the Agdal olive orchard situated near Marrakech city, from May 2022 to date.
The results indicated that the sensible heat fluxes estimated by SEBAL were 3% higher than OMS, while the latent heat fluxes were approximately 13% higher.
In light of these findings, we concluded that the OMS can be fairly used to validate satellite driven surface energy balance models for supporting agricultural water management.
Publication
Authors
H. Barguache, J. Ezzahar, M.H. Kharrou, S. Khabba, J. Elfarkh, A. Laalyej, S. Er-Raki, A. Chehbouni
Keywords
evapotranspiration, optical-microwave scintillometer, Olea europea, semi-arid region
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