Uniformity coefficient of water distribution in three sprinkler types under different wind speeds and riser heights in Ahvaz, Iran

Subject Areas :

Mehdi  Daghagheleh ¹ (Department of Water Engineering and Sciences, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran)
Davoud  Khodadadi Dehkordi ² (Department of Water Engineering and Sciences, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran)
Elnaz  Noroozi ³ (Young Researchers and Elite Club, Miyaneh Branch, Islamic Azad University, Miyaneh, Iran)
Aslan  Egdernezhad ⁴ (Department of Water Engineering and Sciences, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran)

Received: 2017-11-23 Accepted : 2018-05-19 Published : 2018-05-22

Keywords:  Komet,  Nozzle diameter,  Zhaleh 3,  Zhaleh 5,

Abstract :

In this study, the effect of wind speed and riser height on the uniformity coefficient of water distribution in Ahvaz city was investigated. Sprinklers were including Zhaleh 3, Zhaleh 5, and Komet with discharges of 2.11, 4 and 3 m3/h and spraying diameters of 30, 40 and 35 m, respectively and riser heights of 1.0, 1.4, 1.8, and 2.2 m under mild to moderate and severe wind speeds in a solid set system with portable sprinklers were investigated. In the mild to moderate wind speed range, increasing in riser height from 100 to 140 cm, the uniformity coefficient of water distribution increased and in riser height rage from 140 to 220 cm, the uniformity coefficient decreased. In the severe wind speed, increasing in riser height from 100 to 220 cm, the uniformity coefficient decreased. The uniformity coefficient of water distribution in the layout of 18 × 18 m for sprinkler Zhaleh 5 was in the highest and for sprinkler Zhaleh 3 was in the lowest value. Finally, the riser height of 140 cm in the mild wind speed range and the riser height of 100 cm in the severe wind speed range were selected as the best riser heights.

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