an evaluation of water volume controller emitter as compared with the conventional emitters in micro irrigation systems

increasing water distribution uniformity in micro irrigation systems has been an important subject in applied researches. despite considerable progress in emitters’ construction, some research reports refer to their incapability in water distribution uniformity. in order to achieve greater uniformity in micro irrigation, it is necessary to manufacture emitters with low variation in manufacturing coefficient vs. high water uniformity distribution. throughout the present research the performance of new drippers, named water volume controller (wvc) vs. four common emitters were assessed and compared. the results showed that the performance as well as all the uniformity parameters related to water volume controller within all the applied pressures were desirable. the results finally indicated that the maximum emission uniformity in the water volume controller drippers (at 1.5 bar applied pressure) was obtained to be 96% whereas for bubbler emitters in the best conditions, the mentioned parameter was recorded 38.3%.