Next Article in Journal
Optimal Calibration of Evaporation Models against Penman–Monteith Equation
Next Article in Special Issue
Evaluation of Evapotranspiration in Brazilian Cerrado Biome Simulated with the SWAT Model
Previous Article in Journal
A GIS-Based Hydrological Modeling Approach for Rapid Urban Flood Hazard Assessment
Previous Article in Special Issue
Quantifying the Impact of Evapotranspiration at the Aquifer Scale via Groundwater Modelling and MODIS Data
Article

Hydrological Functioning of Maize Crops in Southwest France Using Eddy Covariance Measurements and a Land Surface Model

1
CESBIO, University of Toulouse, CNES/CNRS/INRAE/IRD/UPS, 18, Avenue Edouard Belin, bpi 2801, CEDEX 09, 31401 Toulouse, France
2
Centre National de Recherches Météorological, 31057 Toulouse, France
*
Authors to whom correspondence should be addressed.
Academic Editors: Josef Tanny and Gianfranco Rana
Water 2021, 13(11), 1481; https://doi.org/10.3390/w13111481
Received: 4 February 2021 / Revised: 5 May 2021 / Accepted: 19 May 2021 / Published: 25 May 2021
(This article belongs to the Special Issue Evapotranspiration Measurements and Modeling)
The primary objective of this study is to evaluate the representation of the energy budget for irrigated maize crops in soil–vegetation–atmosphere transfer (SVAT) models. To this end, a comparison between the original version of the interactions between the soil–biosphere–atmosphere (ISBA) model based on a single-surface energy balance and the new ISBA-multi-energy balance (ISBA-MEB) option was carried out. The second objective is to analyze the intra- and inter-seasonal variability of the crop water budget by implementing ISBA and ISBA-MEB over six irrigated maize seasons between 2008 and 2019 in Lamasquère, southwest France. Seasonal dynamics of the convective fluxes were properly reproduced by both models with R2 ranging between 0.66 and 0.80 (RMSE less than 59 W m−2) for the sensible heat flux and between 0.77 and 0.88 (RMSE less than 59 W m−2) for the latent heat flux. Statistical metrics also showed that over the six crop seasons, for the turbulent fluxes, ISBA-MEB was consistently in better agreement with the in situ measurements with RMSE 8–30% lower than ISBA, particularly when the canopy was heterogeneous. The ability of both models to partition the evapotranspiration (ET) term between soil evaporation and plant transpiration was also acceptable as transpiration predictions compared very well with the available sap flow measurements during the summer of 2015; (ISBA-MEB had slightly better statistics than ISBA with R2 of 0.91 and a RMSE value of 0.07 mm h−1). Finally, the results from the analysis of the inter-annual variability of the crop water budget can be summarized as follows: (1) The partitioning of the ET revealed a strong year-to-year variability with transpiration ranging between 40% and 67% of total ET, while soil evaporation was dominant in 2008 and 2010 due to the late and poor canopy development; (2) drainage losses are close to null because of an impervious layer at 60 cm depth; and (3) this very specific condition limited the inter-annual variability of irrigation scheduling as crops can always extract water that is stored in the root zone. View Full-Text
Keywords: ISBA; ISBA-MEB; eddy covariance; sap flow; partitioning; water budget ISBA; ISBA-MEB; eddy covariance; sap flow; partitioning; water budget
Show Figures

Figure 1

MDPI and ACS Style

Dare-Idowu, O.; Jarlan, L.; Le-Dantec, V.; Rivalland, V.; Ceschia, E.; Boone, A.; Brut, A. Hydrological Functioning of Maize Crops in Southwest France Using Eddy Covariance Measurements and a Land Surface Model. Water 2021, 13, 1481. https://doi.org/10.3390/w13111481

AMA Style

Dare-Idowu O, Jarlan L, Le-Dantec V, Rivalland V, Ceschia E, Boone A, Brut A. Hydrological Functioning of Maize Crops in Southwest France Using Eddy Covariance Measurements and a Land Surface Model. Water. 2021; 13(11):1481. https://doi.org/10.3390/w13111481

Chicago/Turabian Style

Dare-Idowu, Oluwakemi, Lionel Jarlan, Valerie Le-Dantec, Vincent Rivalland, Eric Ceschia, Aaron Boone, and Aurore Brut. 2021. "Hydrological Functioning of Maize Crops in Southwest France Using Eddy Covariance Measurements and a Land Surface Model" Water 13, no. 11: 1481. https://doi.org/10.3390/w13111481

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop