Avaliação de parâmetros de desempenho de sistemas de irrigação por pivô central visando sua otimização operacional.

Abstract

The irrigation systems are projected to have a long useful life, thus being, do not have to be disrespected the operational costs with the energy and the consuming of accessories that it composes the same ones, that directly they are related to its hydraulical sizing, the watershed of the cultures and to its water management. This work evaluated some of the parameters that can modify the performance of systems of irrigation for central pivot. For way of this evaluation it was looked to bring to the user of the equipment of irrigation information on the modifications in the performance of the equipment, throughout its useful life, related to the three studied parameters: a) the time of functioning of the equipment, b) speed of the water in the aerial tubing of equipment and c) application or not of chemical products with the irrigation water. One concluded that: a) the evaluation of the operational performance of irrigation systems type "center pivot" must be effected to the long one of the useful life of the equipment, aiming at to guide adjustments and periodic corrections in the operational conditions that allow to optimize the allocation of the water and the energy. b) Is recommendable to analyze the performance of the equipment, adopting the three parameters used in this work: the Christiansen Uniformity Coefficient (CUC), the Distribution Uniformity Coefficient (CUD) and the Efficiency of Application (EA).