Innovative Automatic Self-Compensating Gated Irrigation Pipes

Gated irrigation pipes are an important tool for improving surface irrigation, it's development on depends on replacing the gates by designed self-compensating nozzle (poppet nozzle). The main objective of this study was to improve the distribution uniformity of water discharge along the gated pipe length, by developing a newly designed and locally manufactured self-compensating nozzles. Laboratory and Field experiments were conducted to validation the innovative nozzle of gated irrigation. The main results of this study showed the following: Under operating pressure head ranged between (3.3 to34 kPa), the mean discharge of poppet nozzle with disc diameters of 25, 27 and 29 mm were 0.63, 0.46 and 0.28 l/s, Mean water discharge for 25mm disc diameter was constant (0.81l/s). The mean discharge of poppet nozzles along the pipes with initial pressure head (0.5m, 1.0m and 1.5m) were 0.5, 0.56 and 0.64l/s, with mean coefficient of discharge (Cd) 0.77, 0.75 and 0.72 respectively, finally, Surface irrigation is saving water!, The surface irrigation efficiency is 90 %!, No more calibration of gated irrigation pipes!, Self-control, no external energy and pressure, flow and valve!.