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

Abstract

With the competitiveness in the increasing agricultural sector, mainly in terms of globalization of the economy, the inclusion of new technologies in the agricultural sector, especially the irrigation, is basic to become the sector each more sustainable time. The irrigation systems are projected to have a long useful life, thus being, cannot 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 consumption of energy has trend of increase with the consuming occurred in the equipment, or same to be extreme, which had to a deficient sizing. It is of basic importance that can have ways to evidence these events in each installation of irrigation and also to have a accompaniment of the activities executed with the equipment and that they intervene with its performance. The possible water use of inefficient form, with projected systems of irrigation with problems or necessity of maintenance, reflects the necessity of the constant evaluation in the equipment. This work evaluated some parameters that can modify the performance of systems of irrigation for center 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: the time of functioning of the irrigation equipment, b) speed of the water in the aerial part of equipment and c) application or not of chemical products with the irrigation water. One concluded that: 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).