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Information Journal Paper

Title

Evaluation and Modeling Wind drift and Evaporation Losses of the Center Pivot Irrigation System in Moghan Region

Pages

  109-127

Abstract

 Background and Objectives: Evaluation of any irrigation system and measurable performance analysis of that device in real conditions, is a management tool that allows the system users to make the best use of the irrigation systems. Since various regions in Iran have arid and semiarid climates, obtaining the actual Wind Drift and Evaporation Losses and also making optimized use of water towards sustainable water resources management has a great importance. Since estimation of evaporation and wind losses that has been presented in different climatic conditions has different results, and it is not possible to present a reference model, so the purpose of this study is to investigate the effective climatic parameters on evaporation and wind losses of the Center Pivot system and to present an optimal model using Multivariate Regression in the study area. Materials and Methods: This research has been carried out in the city of Pars-Abad in Ardabil province. The study was conducted in Part of the Moghan Agro-Industrial Complex, at Wind Speeds of 0-3 and 3-6 meters per second with three replications. Experiments were performed on two Center Pivot Irrigation System in sections 5 and 6 of Moghan Agro-Industrial Complex (1-4-6 and 1-8-6), which included two treatments. The average altitude of this area is 32 meters above the sea. To perform the experiment, two rows of cans at an angle of 3 ͦ were positioned 10 m apart radially along the center of the centerpivot system. The sprayer used in this study was F33AS 11/64˝ with 26 m of spraying diameter and operating pressure of the sprinklers about 4. 45 bars. Results: Results indicated that the efficiencies of the system at Wind Speeds of 0-3, 3-6 meters per second were 89. 47, 84. 47 percent, respectively, and Wind Speed, temperature, relative humidity, nozzle diameter, and vapor pressure deficit (saturation deficit) were among the factors that influenced Wind Drift and Evaporation Losses. Base on the results, the wind factor had the most and vapor pressure deficit had the least effect on Wind Drift and Evaporation Losses. Also, the equation of Wind Drift and Evaporation Losses was also obtained with the atmospheric conditions of the region, which had the best fit with the measured values. Results showed that the difference between results of the model and observed data was not significant at 1% level of confidence. Moreover, the measured and the modeled percentages obtained for Wind Drift and Evaporation Losses varied from 7 to 18 and from 10 to 18 percent, respectively. Conclusion: The results showed a direct relationship between the evaporation and wind losses with Wind Speed in the region. So that at Wind Speeds of less than 3 m/s the parameters of Coefficient of Uniformity, Distribution Uniformity and potential and Application Efficiency of the low quarter are in the appropriate range, and at medium and high Wind Speeds, evaluation parameters are not in the desired range, it is indicating the importance of center pivot system design in windy regions.

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    APA: Copy

    HOSEINI, Y., Raoof, M., & Nazari Gigloo, F.. (2021). Evaluation and Modeling Wind drift and Evaporation Losses of the Center Pivot Irrigation System in Moghan Region. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 27(5 ), 109-127. SID. https://sid.ir/paper/962422/en

    Vancouver: Copy

    HOSEINI Y., Raoof M., Nazari Gigloo F.. Evaluation and Modeling Wind drift and Evaporation Losses of the Center Pivot Irrigation System in Moghan Region. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2021;27(5 ):109-127. Available from: https://sid.ir/paper/962422/en

    IEEE: Copy

    Y. HOSEINI, M. Raoof, and F. Nazari Gigloo, “Evaluation and Modeling Wind drift and Evaporation Losses of the Center Pivot Irrigation System in Moghan Region,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 27, no. 5 , pp. 109–127, 2021, [Online]. Available: https://sid.ir/paper/962422/en

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