Guan'gai paishui xuebao (Nov 2023)
An Optimization Model for Rotation Irrigation Groups and Irrigation Duration for Pressurized Drip Irrigation System
Abstract
【Objective】 The pressurized drip irrigation system has extensive applications in diverse conditions. This paper proposes an optimization model for effectively scheduling irrigation and crop rotation within the pressurized drip irrigation system; it presents a comprehensive design framework and method to enhance performance and efficiency of drip irrigation systems. 【Method】 We used hydraulic analyses to elucidate the interplay between irrigation rotation system parameters and the critical hydraulic performance indicators within the pipeline network. A mathematical model was formulated with the objective of minimizing the variation in emitter irrigation amount while adhering to constraints such as irrigation timing, rotation intervals, emitter pressure, and irrigation rotation group flow rates. The model was solved using the genetic algorithm. 【Result】 Within the same project context, when compared to the W1, the drip irrigation system exhibited a significant reduction in the rate of irrigation water deviations, with reductions of 27% and 37% observed under the W2 and W3, respectively. Moreover, the duration of the drip irrigation system was shortened by approximately 15 and 20 hours, resulting in energy savings of 15% and 20%, an enhancement in water resource efficiency by about 14% and 19%, and cost reductions of 80 and 111 Yuan/hm2, and 72~86 and 100~120 Yuan/hm2, respectively, during the crop reproductive phase. 【Conclusion】 The optimization model for irrigation timing and rotation groups in pressurized drip irrigation systems can effectively reduce deviations in irrigation water, shorten the irrigation duration, save electricity and energy consumption, improve water resource utilization efficiency, and reduce water and electricity costs. It is promising for helping enhance overall performance and sustainability of drip irrigation systems.
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