Articles

Using HYDRUS-1D for estimating evapotranspiration and soil water content of irrigated winter wheat under different water management in a semi-arid region of Morocco

Article number
1335_10
Pages
87 – 94
Language
English
Abstract
The objective of this study is to evaluate the potential of the HYDRUS-1D model to estimate actual crop evapotranspiration (ETa) and soil moisture (θ) in the root zone (0-50 cm) over irrigated winter wheat under different water management in a semi-arid region of Tensift-basin (in central Morocco). The study fields were flood irrigated and equipped with meteorological stations, soil moisture sensors, and eddy covariance systems.
The HYDRUS-1D simulations of ET and θ were performed daily during the 2002/2003 growing season.
Firstly, the main parameters of Van Genuchten (1980) hydraulic functions used in HYDRUS-1D model were determined based on the comparison between measured and simulated soil moisture in the root zone.
Afterward, the ETa and θ simulations results, considered as the output of the HYDRUS-1D model, were compared against the measurements.
The obtained outcome shows that the HYDRUS-1D model simulates ETa and θ reasonably well.
The average values of the root mean square error (RMSE) between the observed and measured ETa and θ were 0.58 mm day-1 and 0.04 cm3 cm-3, respectively.

Publication
Authors
S. Er-Raki, J. Ezzahar, C. Anbari, A. Amazirh, B. Ait Hssaine, S. Khabba, M. Fontanet, O. Merlin, A. Chehbouni
Keywords
HYDRUS-1D, evapotranspiration, eddy covariance, irrigated winter wheat, soil moisture
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