A field evaluation of the technical performance of centre pivot sprinkler irrigation system was carried out during the maize crop growing season and when operating with different working speeds S1 - 40%, S2 - 60% and S3 - 80%. For this goal, four uniformity measurements are to be considered in the evaluation; coefficient of uniformity (CU), distribution uniformity (DU), potential efficiency of low quarter application (PELQ) and actual efficiency of low quarter application (AELQ). The first step of evaluation of the sprinkler irrigation system is to compare the measured uniformity values with the standard values, DU a?￥ 75%, CU a?￥ 85%, AELQ and PELQ a?￥ 90%. Effect of variation of speed produced CU values of 80.3, 82.7 and 86% for S1, S2, and S3 speed, respectively. Furthermore, DU standard value was obtained at S3 speed of 82%. Moreover, AELQ and PELQ were below the acceptable standard level of 90% for all speeds. Non-uniform water application leads to over or under irrigation in various parts of the field which can result in wasted water and energy. Therefore, regular evaluation of the irrigation equipments is needed to efficiently and effectively manage irrigation.
展开▼
