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| DOI：10.13522/j.cnki.ggps.2019104 |
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| Optimizing Pipes Diameters and Layout of Pressure-regulating Tanks in Piped Irrigation Network |
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GAO Yuan, MO Tengfei, HE Wuquan, LOU Zongke
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Northwest A&F University, Yangling 712100, China
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| Abstract: |
| 【Objective】The objective of this paper is to present an optimizing method to calculate the layout of pressure-regulating tanks and diameters of pipes in tree-shape piped irrigation network in attempts to improve its safety and reliability in operation. 【Method】The optimization was based on the double-coding method with integer coding by integrating the pressure-regulating pool and the trunk pipe network as a system. The costs of the main pipes and the surge tanks was taken as the objective function, and water pressure at the nodes and water flow rate in the pipes were constrains. The optimization was solved using the genetic algorithm. 【Result】For the studied case, the optimization results showed that it needed two pressure-regulating tanks, one at Node 2 and the other one at Node 4 with the system being divided into two sub-systems. The overall length of all pipes and the overall costs were 10 937.7 m and 4.648 million Yuan, reducing by 12.02% and 17.23%, respectively, compared to those estimated from empirical method.【Conclusion】The dual-coding method based on integer coding is able to obtain the optimal tree-shape pipped irrigation network and the layout of the pressure-regulating tanks. The proposed methods can be used to design piped irrigation network in terrain fields. |
| Key words: gravity-driven tree-type piped irrigation network; pressure-regulating tank; genetic algorithm; integer coding; double coding |
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