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| DOI：10.13522/j.cnki.ggps.20180426 |
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| Optimizing the Field Pipe Network of Micro-sprinkler Irrigation System |
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TIAN Xinmiao , HAO Xinmei , MA Xiaoyi , LIU Ye
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1.China Agricultural University, Beijing 100083, China; 2. Northwest A & F University, Yangling 712100, China
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| Abstract: |
| 【Objective】Most existing study on optimizing micro-irrigation pipe network did not consider the outlet position despite its importance. This paper aims to elicit this for the pipe network under natural pressure.【Method】We analyzed three scenarios assuming the outlet was on corner, on one side, and on center of the field; the objective of the optimization was to minimize the investment with the length and diameter of both capillary and branch pipes as the decision variables. The optimization problem was solved using the genetic algorithm. 【Result】Compared to standard design protocol, the optimized results obtained from the proposed model reduced the costs of the pipelines by 20%, 15.2% and 23.9%, when outlet was on corner, one-side outlet and center of the field respectively. The one-side outlet was the cheapest for pipe network, saving 7.6% and 7.2% compared to the corner and central outlet respectively. We chose unidirectional capillary layout for the outlet at the corner and on one side, and the bidirectional one was used for outlet in the middle. For the field network, the cheapest is central outlet, saving 11.8% and 9.9% respectively, compared to corner and side outlet respectively.【Conclusion】Application of the optimization model can save costs of field pipe network, and for the three scenarios we examined, the central outlet was most economically efficient. |
| Key words: micro-irrigation; field network; design optimization; GA |
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