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| Multi-objective technical parameters optimization of sprinkler irrigation system with dynamic hydraulic pressure on sloping land |
| FU Boyang1, ZHANG Lin2*, HUANG Yu1 |
| 1. College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China; 2. Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China |
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Abstract Dynamic hydraulic water supply can effectively improve the distribution uniformity of sprinkler irrigation on sloping land. In order to optimize the technical parameters of dynamic hydraulic pressure sprinkler irrigation meeting the dual objectives requirements of sprinkler irrigation quality and less economic input, the technical parameters such as sprinkler spacing, layout mode, dynamic pressure parameters(average pulsating pressure, amplitude)and other technical parameters were chosen as input indicators. Taking the sprinkler irrigation intensity, uniformity, initial investment and annual ope-ration cost as output indicators, the effectiveness of DMU was evaluated by data envelopment analysis(DEA), and non-effective DMU was improved. Combined with the antagonistic cross evaluation, the technical parameters were sorted, and the optimization method of technical parameters was constructed. Taking sprinkler Rainbird R5000 as the research objective, the field engineering design of sprinkler irrigation system was carried out on the slope where alfalfa was planting area of 1 hm2(slope of 10%). Finally, the dynamic hydraulic slope sprinkler irrigation technical parameters with the maximum value of cross-evaluation efficiency were optimized as follows: the sprinkler should be arranged in a square with a spacing of 8 m, the average water pressure was 300 kPa, and the amplitude of water pressure was 50 kPa.
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Received: 29 January 2021
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