Experimental study on the hydraulic performance of impact-sprinkler system using aquaculture water for irrigation

Abstract

【Background】 Sprinkler irrigation is a widely used technique across various sectors. This study examines the impact of using aquaculture water for irrigation on the hydraulic performance of the 20PY2H impact sprinkler systems. 【Method】 The experiments were conducted under varying working pressures and nozzle spacings, with clean water irrigation serving as the control. Measurements in the experiments included the pressure-flow relationship and water-droplet distribution around the nozzle for each treatment. The relationships between irrigation water type, working pressure, and nozzle spacing were analyzed, along with the influence of meteorological factors on irrigation uniformity. 【Result】 ① Compared with the control using clean water for irrigation, irrigation using aquaculture water reduced flow rate of the sprinkler system by 2.06%-5.38%. ② When working pressure was in the range of 200-300 kPa and nozzle-spacing was in the range of 1.0-1.4 of the radius of the covered area of the nozzle, the value of the CU calculated by our proposed model varied from 0.74 to 0.88, close to the measured CU which was in the range of 0.66 to 0.79. The erratic change in meteorological conditions in the field could reduce irrigation uniformity by 6.28%-12.78%. 【Conclusion】 Using aquaculture water for irrigation decreases the flow rate of the sprinkler systems. The effect of working pressure and nozzle spacing on irrigation uniformity is more pronounced when using clean water than using aquaculture water.

Keywords

• farming fertilizer water
• impact sprinkler
• hydraulic performance
• test water distribution
• uniformity coefficient