Uniformity of distribution of water and water depth applied in central pivot system in function of the relative position of the lateral line

Abstract

An irrigation system should enable the efficient management of applied water. For this it is necessary to evaluate the performance of the system in operation. This study aimed to evaluate the uniformity of distribution, consumption of electricity and water depth applied by a center pivot irrigation system in function of the relative position of the lateral line. It was tested three positions of lines collecting water: incline of 3.45%, level and slope of 11.78%. The experimental design was completely randomized design with three repetitions at each position tested. It was applied the analysis of variance followed by Tukey test. The average coefficient of uniformity of Heermann & Hein was 90.02%, describing the uniformity of water distribution as very good. The mean weighted depth of irrigation applied was 5.84 mm, varying in each test significantly (5%) between the positions of slope versus incline and level. It was concluded that the position of the lateral line significantly influenced the uniformity of distribution, water applied and energy consumption.