Horizon / Plein textes La base de ressources documentaires de l'IRD



Publications des scientifiques de l'IRD

Boudhina N., Masmoudi M. M., Alaya I., Jacob Frédéric, Ben Mechlia N. (2019). Use of AquaCrop model for estimating crop evapotranspiration and biomass production in hilly topography. Arabian Journal of Geosciences, 12 (8), art. 259. ISSN 1866-7511

Accès réservé (Intranet IRD) Demander le PDF

Lien direct chez l'éditeur doi:10.1007/s12517-019-4434-9

Use of AquaCrop model for estimating crop evapotranspiration and biomass production in hilly topography
Année de publication2019
Type de documentArticle référencé dans le Web of Science WOS:000463616600002
AuteursBoudhina N., Masmoudi M. M., Alaya I., Jacob Frédéric, Ben Mechlia N.
SourceArabian Journal of Geosciences, 2019, 12 (8), p. art. 259. p. art. 259 ISSN 1866-7511
RésuméThe use of crop models in sloping areas is questionable when relief is not taken into account, as relief affects infiltration, radiation, and aerodynamic processes. The objective of this work is to evaluate the performance of FAO-AquaCrop model in simulating crop evapotranspiration, water balance, and biomass production in hilly areas using in situ measurements. The experiment was conducted in the Cap-Bon region, north-eastern Tunisia, on two wheat fields located on opposite sloping rims (A and B) and one control field (C) on a flat terrain: field A is SE-oriented with 5% slope and B is NW-oriented with 6% slope. Three flux stations were used to monitor automatically actual evapotranspiration (ET) and climatic factors whereas soil moisture and biomass production were measured manually. Model's outputs were compared to actual measurements using statistical indicators: slope of the regression line, root mean squared error (RMSE), and the coefficient of determination (R-2). Actual ET varied between 1 and 2 mm during crop initial stage and 3-4 mm during mid-season stage. The ET/ETo ratio during mid-season was 0.81, 0.74, and 1.03, respectively for fields A, B, and C, well below the commonly used value of 1.15. Comparison between measured and simulated ET shows a substantial overestimation of the model in sloping fields with 6-20% higher averages and a RMSE of 0.47-0.77 mm/day. AquaCrop seems to simulate reasonably well water balance, particularly in flat conditions. RMSE of water content in the top 100 cm soil-layer was in the range 41-67 mm/m, representing a relative error of 11-21%. Simulated and measured biomass values presented similar trends (R-2 = 0.86-0.94) with a systematic difference, indicating that AquaCrop outputs could be improved by a correction factor.
Plan de classementBioclimatologie [072] ; Sciences fondamentales / Techniques d'analyse et de recherche [020]
LocalisationFonds IRD [F B010075967]
Identifiant IRDPAR00019154
Lien permanenthttp://www.documentation.ird.fr/hor/PAR00019154

Export des données

Disponibilité des documents

Télechargment fichier PDF téléchargeable

Lien sur le Web lien chez l'éditeur

Accès réservé en accès réservé

HAL en libre accès sur HAL

Accès aux documents originaux :

Le FDI est labellisé CollEx

Accès direct

Bureau du chercheur

Site de la documentation

Espace intranet IST (accès réservé)

Suivi des publications IRD (accès réservé)

Mentions légales

Services Horizon

Poser une question

Consulter l'aide en ligne

Déposer une publication (accès réservé)

S'abonner au flux RSS

Voir les tableaux chronologiques et thématiques

Centres de documentation


Montpellier (centre IRD)

Montpellier (MSE)









La Paz