Brazilian Journal of Biological Sciences (ISSN 2358-2731)

Home Archive v. 6, no. 12 (2019) Ghazouani


Vol. 6, No. 12, p. 203-221 - Apr. 30, 2019


Assessing AquaCrop model to simulate soil water contents under semi arid climate of Central Tunisia

Hiba Ghazouani , Basma Latrech , Mguidich Belhaj Amel , Cherni Amani , Boutheina M'hamdi Douh , Ghazouani Issam and Abdelhamid Boujelben

The objective of the present study was to preliminary calibrate and validate AquaCrop model based on crop conservative parameters from the literature for plant growth and water stress thresholds. In addition, physical soil characteristics, root growth, duration of plant stages and atmospheric demands were introduced according to field measurements. Based on this preliminary calibration, simulated water contents were compared to a measured data set of water contents retrieved from deficit and full irrigation treatments on a potato cropped field during an experimental year of 2015. Statistical indexes were computed and finally this performance in simulating water contents were validated under independent measurements carried out during an experiments campaign on the same field on 2014. Moreover, the paper presents the experimental protocol followed for soil characterization, considered as a milestone component for this soil water contents prediction. Results showed, that under the followed preliminary calibration, the model was able to simulate water contents (Ɵv). In general, values of Root Mean Square Error were lower than 0.03 representing the magnitude of error of the time domain reflectometry probe. Moreover values of Nash coffecients were close to 1 confirming the goodness of fit between measured and estimated water contents. Once assessed, the model could be used to study effects of different irrigation strategies on dynamic of water contents aiming to increase water use efficiency.

Full irrigation; Deficit irrigation; Calibration; Water contents; Validation.


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Allen, R.; Pereira, S.; Raes, D.; Smith, M. Crop evapotranspiration guidelines for computing crop water requirements. Rome: FAO, 1998. (Irrigation and Drainage, 56).

Bagnouls, F.; Gaussen H. Saison sèche et indice xérothermique. Documents pour les Cartes des Productions Vegetales, Tome III(1), Toulouse, 1953.

Dane, J. H.; Hopmans, J. W. Pressure plate extractor. In: Dane, J. H.; Topp, G. C. (Eds.). Methods of soil analysis. Part 4. Physical methods. Madison, WI: SSSA, 2002. (SSSA Book Serie, 5). p. 688-690.

Dane, J. H.; Topp, G. C. Methods of soil analysis. Part 4: Physical methods. Madison: Soil Science Society of America, 2002. (SSSA Book Serie, 5).

Farahani, H. J.; Izzi, G.; Oweis, T. Y. Parameterization and evaluation of the AquaCrop model for full and deficit irrigated cotton. Agronomy Journal, v. 101, no. 3, p. 469-476, 2009.

Heng, L. K.; Hsiao, T.; Evett, S.; Howell, T.; Steduto, P. Validating the FAO AquaCrop model for irrigated and water deficient field maize. Agronomy Journal, v. 101, no. 3, p. 488-498, 2009.

Hsiao, T. C.; Heng, L.; Steduto, P.; Rojas-Lara, B.; Raes, D.; Fereres, E. AquaCrop: The FAO crop model to simulate yield response to water: III. Parameterization and testing for maize. Agronomy Journal, v. 101, no. 3, p. 448-459, 2009.

Jury, W. A.; Vaux, H. The role of science in solving the world's emerging water problems. PNAS, v. 102, no. 44, p. 15715-1572, 2005.

Katerji, N.; Campi, P.; Mastrorilli, M. Productivity, evapotranspiration, and water use efficiency of corn and tomato crops simulated by AquaCrop under contrasting water stress conditions in the Mediterranean Region. Agricultural Water Management, v. 130, p. 14-26, 2013.

Kawakami, J.; Iwama, K.; Jitsuyama, Y. Effects of planting date on the growth and yield of two potato cultivars grown from microtubersand conventional seed tubers. Plant Production Science, v. 8, no. 1, p. 74-78, 2005.

Moriasi, D. N.; Arnold, J. G.; Van Liew, M. W.; Bingner, R. L.; Harmel, R. D.; Veith T. L. Model evaluation guidelines for systematic quantification of accuracy in watershed simulations. Transaction of the American Society of Agricultural and Biological Engineers, v. 50, no. 3, p. 885-900, 2007.

Nash, J. E.; Sutcliffe, J. V. River flow forecasting through conceptual model. Part 1: A discussion of principles. Journal of Hydrology, v. 10, no. 3, p. 282-290, 1970.

Paredes, P.; Rodrigues, G. C.; Alves, I.; Pereira, L. S. Partitioning evapotranspiration, yield prediction and economic returns of maize under various irrigation management strategies. Agricultural Water Management, v. 135, p. 27-39, 2014.

Raes, D.; Steduto, P.; Hsiao, T. C.; Fereres, E. AquaCrop Reference Manual: Version 4. Rome, Italy: FAO Land and Water Division, 2012.

Rallo, G.; Agnese, C.; Minacapilli, M.; Provenzano, G. Comparison of SWAP and FAO agro-hydrological models to schedule irrigation of wine grape. Journal of Irrigation and Drainage Engineering, v. 138, no. 7, p. 581-591, 2012.

Seki, K. SWRC fit: A nonlinear fitting program with a water retention curve for soils having unimodal and bimodal pore structure. Hydrology and Earth System Science Discussion, v. 4, p. 407-437, 2007.

Shahnazari, A.; Liu, F.; Andersen, M. N.; Jacobsen, S.-E.; Jensen, C. R. Effects of partial root-zone drying on yield, tuber size and water use efficiency in potato under field conditions. Field Crops Research, v. 100, no. 1, p. 117-124, 2007.

Šimůnek, J.; Van Genuchten, M. Th. Modeling nonequilibrium flow and transport with HYDRUS. Vadose Zone Journal, v. 7, no. 2, p. 782-797, 2008.

Steduto, P.; Hsiao, T.C.; Raes D.; Fereres, E. AquaCrop: The FAO crop model to simulate yield response to water: I. concepts and underlying principles. Agronomy Journal, v. 101, no. 3, p. 426-437, 2009.

Van Dam, J. C.; Groenendijk, P.; Hendriks, R. F. A.; Kroes, J. G. Advances of modeling water ?ow in variably saturated soils with SWAP. Vadose Zone Journal, v. 7, p. 640-653, 2008.