Enhancing the integrated management of agricultural water in an irrigation network with the aim of balancing the aquifer (Case study: Qazvin irrigation District)
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Article Type:
Case Study (دارای رتبه معتبر)
Abstract:

Balancing aquifers located in agricultural areas requires improving the performance of the surface water transmission, distribution and delivery system. This study investigates the effectiveness of improving the performance of the water distribution system (main irrigation canal) in balancing the aquifer. In the first step, the numerical model of Qazvin aquifer, with MODFLOW code in GMS software, was developed to show the effect of operation methods in the main irrigation canal. Next, the hydraulic flow simulator model of the water distribution system in the main irrigation canal was developed, calibrated and validated with MATLAB software. Finally, it was linked to the predictive automatic control system. Finally, the effect of predictive automatic control system on aquifer balance was investigated. The results showed that by improving the performance of the water distribution system in the main irrigation canal, the adequacy index improved by upgrading the existing operation method to a centralized automatic control system (MPC). It is about 30% in the end areas of the irrigation district. Accordingly, the rate of reduction of abstraction from the aquifer by using the automatic predictive control system is about 401.86 million cubic meters per year. The results of numerical modeling of the aquifer showed that in the present method, the operation of the groundwater level continues to maintain an increasing trend of decline. As the results show the amount of annual drop of about 150 cm in the usual operation method. The use of predictive centralized automatic control system has increased the adequacy of water delivery to reservoirs and this has led to an increase in water levels in observation wells located in agricultural areas.

Language:
Persian
Published:
Journal of Water and Irrigation Management, Volume:11 Issue: 3, 2021
Pages:
575 to 591
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