Multicriteria evaluation of the AquaCrop crop model in a hilly rainfed Mediterranean agrosystem

Dhouib, M.; Zitouna-Chebbi, Rim; Prévot, Laurent; Molénat, Jérôme; Mekki, Insaf; Jacob, Frédéric

doi:10.1016/j.agwat.2022.107912

Cited by 8 publications

(7 citation statements)

References 78 publications

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“…This means that the model being water driven responded well to the rainfall contributions in the root zone. The simulation compares well with R 2 ≥ 0.85, RMSE ≤ 2.59%, and NRMSE ≤ 12.95% [82] and better than R 2 of 0.62, and RMSE = 27.4 mm for SWS [83]. The model simulated SWS around the field capacity but not to saturation and wilting point.…”

Section: Discussionmentioning

confidence: 60%

Assessment of the AquaCrop model to simulate the impact of soil fertility management on evapotranspiration, yield, and water productivity of maize (Zea May L.) in the sub-humid agro-ecology of Nigeria

Adeboye,

Schultz,

Adeboye

et al. 2024

Discov Agric

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Field experiments were conducted for two seasons in Ile-Ife, Nigeria to evaluate the performance of the AquaCrop model in simulating the effects of soil fertility management on the canopy cover (CC), soil water storages (SWS), cumulative aboveground biomass (BM), evapotranspiration (ETa), grain yields, and water productivity (WP) of rainfed maize. Six levels of soil fertility management and two cultivars of maize, SUWAN 1-SR and PVA led to a 2 by 6 factorial experimental treatment and arranged in a randomized complete block design. Agronomic and environmental parameters were measured for two consecutive seasons. The AquaCrop model was calibrated using data from the wetter year. The AquaCrop model captured well the variances in the CC, R2 ≥ 0.88, RMSE ≤ 14.2, and d-index ≥ 0.97 under full and stressed soil fertility. Although the AquaCrop model over and underestimated SWS, it is still within acceptable limits. The model simulated SWS well, R2 ≥ 0.71, EF ≥ 0.97, and d-index ≥ 0.97. AquaCrop tends to underestimate ETa under rainfall and NPK variabilities. The AquaCrop model simulated grain yields excellently, R2 = 0.99, b = 1.00. The 150% of the recommended NPK application is suitable for the desired improvement in land and water productivity of the crop. The AquaCrop model predicted and captured the trends in the yields and water productivity of maize adequately under varying NPK applications. Further research is required on other cultivars of the crop and locations in the area in order to generalize the adequacy of the model.

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Section: Discussionmentioning

confidence: 60%

Assessment of the AquaCrop model to simulate the impact of soil fertility management on evapotranspiration, yield, and water productivity of maize (Zea May L.) in the sub-humid agro-ecology of Nigeria

Adeboye,

Schultz,

Adeboye

et al. 2024

Discov Agric

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“…Second, OMERE observations are collected within the Kamech catchment (Cap Bon Peninsula, northeastern Tunisia), which is representative of semiarid Mediterranean regions in terms of crops, soil, and climate. Third, the AquaCrop model was shown to acceptably simulate runoff and crop functioning under the agro-pedo-climatic conditions of the Kamech catchment (Dhouib et al 2022).…”

Section: About Here]mentioning

confidence: 97%

“…A second ltering step de nes a threshold value for Δ to account for uncertainties in the AquaCrop simulations. For this, we refer to Dhouib et al (2022), who reported that the model satisfactorily simulates AGB, with a relative error between observations and simulations of approximately 11%. Therefore, we choose a threshold of 0.11 for the absolute value for Δ, above which the impact of water input through connectivity is considered signi cant as it exceeds the modelling uncertainty.…”

Section: Simulation Analysismentioning

confidence: 99%

Impact of hydrological connectivity on rainfed annual crops in Mediterranean hilly landscapes: a numerical exploration

Dhouib,

Molénat,

Prévot

et al. 2024

Preprint

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Within hilly agricultural landscapes, topography induces lateral transfers of runoff water, so-called interplot hydrological connectivity. Runoff water generated in upstream plots can infiltrate downstream plots, thus influencing the water content in the root zone that drives crop functioning. As the impact of runoff on crop functioning in the context of Mediterranean rainfed annual crops has been understudied thus far, the current study aims to comprehensively investigate this effect. To quantify how the downstream infiltration of upstream runoff affects crop functioning, we conduct a numerical experiment using the AquaCrop crop model and consider two hydrologically connected plots. The experiment explores a range of upstream and downstream agro-pedo-climatic conditions: crop type, soil texture and depth, climate forcing, and the area of the upstream plot. The experiment relies on data collected over the last 25 years within the Kamech catchment, an environment research observatory in northeastern Tunisia. Overall, the results show that the downstream infiltration of upstream runoff has a positive impact on crop functioning in a moderate number of situations, ranging from 16% (wheat) to 33% (faba bean) as the average across aboveground biomass and yield. This positive impact is mostly found for soils with higher available water capacity and under semiarid and dry subhumid climate conditions, with a significant impact of rainfall intra-annual distribution in relation to crop phenology. These results need to be deepened by considering both a wider range of crops and future climate conditions, for which larger occurrences of semiarid climate conditions are expected.

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“…Heavy clays have distinct cracking and swelling characteristics that may be difficult to incorporate in model simulations. In a study on several landscapes including Cambisols, Vertisols, Luvisols, and Regosols, run-off was poorly simulated in AquaCrop when cracks were present; however, overall, the soil water content and crop conditions were simulated well in AquaCrop due to the moderate influence of runoff in the soil water balance (Dhouib et al, 2022).…”

Section: Introductionmentioning

confidence: 98%

Improving water use efficiency of surface irrigated sugarcane

Mortel,

Madramootoo

2023

Front. Water

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Sugarcane (Saccharum officinarum) is a traditional major crop and export of Guyana. This study aims to assess the current irrigation scenario and propose scenarios to maximize the yield and water use efficiency of sugarcane (S. officinarum) in Guyana, using the AquaCrop model. Field-measured climate and soil data, and local crop parameters were used in the simulations. The crop simulations were calibrated with actual yields from 2005 to 2008. The calibrated parameters were then validated using the 2009 to 2012 yield dataset. The good agreement (RMSE of 7.15%) with the recorded yield during validation and the low sensitivity of calibrated parameters indicate the acceptability of AquaCrop and the parameters used for simulations. During calibration, the yield was weakly sensitive (0.6–2% ΔRMSEn) to changes in crop parameter values with the highest sensitivity observed for the maximum canopy cover (CCx) and the crop coefficient (kcmax). Several irrigation scenarios were then simulated, of which no significant reduction or increase in yield was observed between the scenarios 50% to 100% of the total available water (TAW). A threshold of 50%TAW is advised during dry periods to avoid significant yield loss. It is recommended that this scenario be validated with field experiments. The results of this study will assist in maintaining high sugarcane yields even during dry conditions.

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Multicriteria evaluation of the AquaCrop crop model in a hilly rainfed Mediterranean agrosystem

Cited by 8 publications

References 78 publications

Assessment of the AquaCrop model to simulate the impact of soil fertility management on evapotranspiration, yield, and water productivity of maize (Zea May L.) in the sub-humid agro-ecology of Nigeria

Assessment of the AquaCrop model to simulate the impact of soil fertility management on evapotranspiration, yield, and water productivity of maize (Zea May L.) in the sub-humid agro-ecology of Nigeria

Impact of hydrological connectivity on rainfed annual crops in Mediterranean hilly landscapes: a numerical exploration

Improving water use efficiency of surface irrigated sugarcane

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