Irrigation uniformity is one of the most important indicators of drip irrigation system,and
clogging is perhaps the most common factor which affects the uniformity. In order to evaluate the
influence of clogged emitters on the irrigation uniformity and the growth of crops during the operational
process of drip irrigation system,the concept and computational method of location distribution uniformity
of clogged emitters were set up based on the Christiansen uniformity,and then a new computational
method of drip irrigation uniformity was proposed by using the arithmetic mean of the location distribution
uniformity of clogged emitters and the flux uniformity of emitters,finally a comparison between several
types of computational method of uniformity in a lateral and a subunit was made. The results showed that
both the drip irrigation uniformity which considered the location distribution of clogged emitters and the
Christiansen uniformity can reflect the influence of the amount of clogged emitter and the level of clogging
on irrigation uniformity. In the meanwhile,the proposed method can also reflect the influence of location
distribution of clogged emitters on the irrigation uniformity and overcome the weakness of Christiansen
uniformity which only considered the influence of flow deviation.
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