Efficient water application through drip irrigation depends upon a careful study of hydraulic parameters of the system in the field which indicates the effect of pressure on coefficient of variation, emitter flow variation, emission uniformity, uniformity coefficient and irrigation efficiency. Among these, the experiment was conducted at the levelled field to evaluate the hydraulic performance of drip irrigation system with emission device viz. inline emitters 1.3 lph and 2.4 lph for varying pressure viz. 0.7, 0.9, 1.2 and 1.5 kg/cm2. Experimental set up was installed for determination of coefficient of variation, emitter flow variation, emission uniformity, uniformity coefficient, application and distribution efficiency. The result revealed that different hydraulic measures such as coefficient of variation (0.047 and 0.029) and emitter flow variation (14.23% and 8.73%) was found minimum at 1.5 kg/cm2 pressure for both 1.3 and 2.4 lph emitters respectively. These parameters were found maximum at 0.7 kg/cm2 for both emitters. Similarly, emission uniformity (94.68% and 96.66%), uniformity coefficient (95.3% and 97.1%), application efficiency (92.98% and 96.07%) and distribution efficiency (95.3% and 97.1%) was found maximum at 1.5 kg/cm2 pressure for both 1.3 and 2.4 lph emitters respectively. These parameters were found minimum at 0.7 kg/cm2 pressure for both emitters.
Hydraulic performance, drip irrigation, emission uniformity, irrigation efficiency
