SIMULATION OF WATER DISTRIBUTION PATTERN OF SINGLE SPRINKLER OF CENTER PIVOT IRRIGATION SYSTEM USING GAMMA AND NORMAL PROBABILITY DISTRIBUTIONS

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FAALIAN A.; SADR ALDINI S.A.A.; FAKHERIFARD A.; NAZEMI AMIR HOSSEIN

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Journal: Iranian Journal of Irrigation and Drainage Year:2010 | Volume:4 | Issue:1 Page(s): 118-131

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Title

SIMULATION OF WATER DISTRIBUTION PATTERN OF SINGLE SPRINKLER OF CENTER PIVOT IRRIGATION SYSTEM USING GAMMA AND NORMAL PROBABILITY DISTRIBUTIONS

Author(s)

FAALIAN A. | SADR ALDINI S.A.A. | FAKHERIFARD A. | NAZEMI AMIR HOSSEIN | Issue Writer Certificate

Keywords

SINGLE SPRINKLER DISTRIBUTION PATTERNQ3

PROBABILITY DISTRIBUTIONSQ3

CENTER PIVOT SYSTEMQ3

SIMULATIONQ2

Abstract

A semi empirical model has been developed to simulate the distribution pattern of a single sprinkler of center pivot irrigation system using Gamma and Normal distribution functions. A Nelson R-3000 sprayer with rotator pad and water application angle of 360o which is one of the most common types of center pivot sprinklers was selected. Several field experiments according to the ISO-8026 and ASAE-S398.1 standards were performed to assess the water distribution pattern in no-wind and windy conditions. Results of eighteen reliable experiments were used to validate the model. Minimum and maximum wind speeds recorded under the field conditions were 0.57 and 7.41 ms-1, respectively. In this range of wind speed variation the model using both distribution functions showed a proper capability to simulate the water distribution pattern. The average values of R2 and RMSE between observations and simulated values using Gamma distribution function were 0.86 and 0.35 and for Normal distribution function were 0.80 and 0.44, respectively. Then it was finally concluded that the model based on Gamma distribution function was more accurate than the other one with Normal distribution function. The best fitness between simulated values and observations was achieved using Gamma distribution function with R2=0.96 and the weakest obtained using Normal distribution function with R2=0.72.

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APA: Copy

FAALIAN, A., SADR ALDINI, S.A.A., FAKHERIFARD, A., & NAZEMI, AMIR HOSSEIN. (2010). SIMULATION OF WATER DISTRIBUTION PATTERN OF SINGLE SPRINKLER OF CENTER PIVOT IRRIGATION SYSTEM USING GAMMA AND NORMAL PROBABILITY DISTRIBUTIONS. IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, 4(1), 118-131. SID. https://sid.ir/paper/131779/en

Vancouver: Copy

FAALIAN A., SADR ALDINI S.A.A., FAKHERIFARD A., NAZEMI AMIR HOSSEIN. SIMULATION OF WATER DISTRIBUTION PATTERN OF SINGLE SPRINKLER OF CENTER PIVOT IRRIGATION SYSTEM USING GAMMA AND NORMAL PROBABILITY DISTRIBUTIONS. IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE[Internet]. 2010;4(1):118-131. Available from: https://sid.ir/paper/131779/en

IEEE: Copy

A. FAALIAN, S.A.A. SADR ALDINI, A. FAKHERIFARD, and AMIR HOSSEIN NAZEMI, “SIMULATION OF WATER DISTRIBUTION PATTERN OF SINGLE SPRINKLER OF CENTER PIVOT IRRIGATION SYSTEM USING GAMMA AND NORMAL PROBABILITY DISTRIBUTIONS,” IRANIAN JOURNAL OF IRRIGATION AND DRAINAGE, vol. 4, no. 1, pp. 118–131, 2010, [Online]. Available: https://sid.ir/paper/131779/en

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