Anti-clogging Performance of Drip Emitters under Silt Content Water Irrigation

Under silt content water irrigation,discharge variation and deposition of four drip tubes(tapes) was studied through field experiment.After many irrigation experiments,the results demonstrated that with the increasing of irrigation frequency and distant from inlet of lateral,discharge of four drip tubes(tapes) all decreased,and finally completely clogged emitters located at the terminals of the laterals.Under the same water quality and irrigation pressure,the anti-clogging performance of large flow rate emitter was much better,namely large flow path emitter was better than small.With the increasing of irrigation frequency small silt deposited in all drip tubes(tapes),and for small flow rate drip tubes(tapes) suddenly increased at 70~80 m,but for large ones suddenly increased at 80~90 m,that increased the probability of emitter clogging.Washing drip tubes(tapes) regularly could decrease the probability of clogging.