Younes, A., YASIN, H. (2025). The Effect of Sprinkler head Rotation Speed and Cyclically Pressure Head Variation on The Uniformity of Water Distribution for Stationary Sprinkler Irrigation Systems. , 30(1), 27-39. doi: 10.33899/rengj.2023.141214.1267
Arwa Mamoun Younes; HAQQI ISMAIL YASIN. "The Effect of Sprinkler head Rotation Speed and Cyclically Pressure Head Variation on The Uniformity of Water Distribution for Stationary Sprinkler Irrigation Systems". , 30, 1, 2025, 27-39. doi: 10.33899/rengj.2023.141214.1267
Younes, A., YASIN, H. (2025). 'The Effect of Sprinkler head Rotation Speed and Cyclically Pressure Head Variation on The Uniformity of Water Distribution for Stationary Sprinkler Irrigation Systems', , 30(1), pp. 27-39. doi: 10.33899/rengj.2023.141214.1267
Younes, A., YASIN, H. The Effect of Sprinkler head Rotation Speed and Cyclically Pressure Head Variation on The Uniformity of Water Distribution for Stationary Sprinkler Irrigation Systems. , 2025; 30(1): 27-39. doi: 10.33899/rengj.2023.141214.1267

The Effect of Sprinkler head Rotation Speed and Cyclically Pressure Head Variation on The Uniformity of Water Distribution for Stationary Sprinkler Irrigation Systems

Al-Rafidain Engineering Journal (AREJ)
Volume 30, Issue 1, March 2025, Pages 27-39    PDF (875.22 K)
Document Type: Review Paper
DOI: 10.33899/rengj.2023.141214.1267
Authors
Arwa Mamoun Younes* 1; HAQQI ISMAIL YASIN2
1Dams and Water Resources Engineering Department, College of Engineering, University of Mosul, Mosul, Iraq
2Dams and Water Resources Engineering Department/College of Engineering/University of Mosul
Abstract
The research includes studying the effect of sprinkler rotation speed and cyclic pressure head variation on the pattern and degree of uniformity of water distribution and its interaction with the spacings between the sprinklers and their rectangular and triangular arrangement of four heads of different sprinklers. The research included conducting laboratory experiments to find the pattern of water distribution for a single sprinkler along a ray representing the radius of the wetting circle that its center is the sprinkler for two constant and variable pressure heads, three rotation rates (fast, moderate and slow) of the sprinkler head. Then, the pattern of field distribution of sprinkling water was determined, and the degree of uniformity of water distribution interm of uniformity coefficient and distribution uniformity coefficient were calculated. The results showed that there is no effect on the water distribution pattern when operating with a constant pressure head or operating with cyclically variation pressure head at each of the sprinkler rotation speed levels for all sprinkler heads under study. It was noted that the average depth of the water distribution pattern increased, and the wetted area decreased at the fast rotation rate of the sprinkler and vice versa. The study provided empirical equations for estimating uniformity coefficient and distribution uniformity coefficient at different speeds of sprinkler rotation.
Keywords
Grid sprinkler system; uniformity coefficient; sprinkler head rotation; pressure head variation; sprinkler arrangement
Supplementary Files
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