Document Type : Research Paper
Authors
1
Department of Irrigation and Reclamation Engineering. Faculty of Agriculture, University of Tehran, Tehran, Iran
2
Department of Irrigation and Reclamation Engineering, Faculty of Agriculture, University of Tehran, Tehran, Iran
3
Department of Water Engineering, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran
4
Department of Irrigation and Drainage, Faculty of Water and Environmental Engineering, Shahid Chamran University, Ahvaz, Iran
Abstract
Sugarcane is a plant that has the most water requirement in the summer when the least rainfall occurs, and there is a need to irrigate this plant. In this research, the simulation and modeling of sugarcane cultivation with a focus on the water-environment-food nexus, utilizing the system dynamics approach, have been conducted at the Hakim Farabi Khuzestan Agro-Industry Company. This research was modeled using Vensim software. The model is an integrated and interconnected simulation of water consumption, product production, drainage water volume, salinity, and soil salinity. The information of three years 2015 to 2017 was used for calibration and the information of two years 2018 to 2019 was used to validate the model. MAE, MBE, and MAPE statistical parameters were used to evaluate the model results. The modeling results showed that the model has high accuracy in the calibration period with an MAE index of 6.31 ton/ha for crop yield, 53.56 mm for water drainage volume, 1.21 dS/m for water drainage salinity, and 0.09 dS/m for soil salinity. Also, the results of the same index in the validation period, which were 3.04 ton/ha for crop yield, 48.76 mm for water drainage volume, 1.11 dS/m for water drainage salinity, and 0.04 dS/m for soil salinity, indicate that the model is highly accurate in simulating the existing conditions. The highest water productivity was achieved at a rate of 3.75 kg/m³ in 2019.
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