Avaliação dos parâmetros de desempenho de um sistema de irrigação do tipo pivô central

Abstract

National irrigated agriculture has grown in all regions of the country, due to the high competitiveness of the agricultural sector, since irrigation is a decisive factor in increasing the profitability of cultivated areas, in addition to ensuring production in periods of water scarcity. In this aspect, sprinkler irrigation has gained more and more notoriety since the equipment does not require the systematization of the area for the implementation of the system. Although these equipment’s have a long useful life, they still suffer from the natural wear and tear caused by intensive use. In view of this, evaluations and maintenance must be carried out frequently to check for possible failures that corroborate the loss of performance of the equipment. Therefore, an evaluation of the performance parameters of the central pivot irrigation system was carried out in the municipality of São Francisco de Assis, in the border Oeste region of the state of Rio Grande do Sul, through the evaluation of the coefficients of uniformity of distribution and distribution. the efficiency of application of the water slide. Thus, the present study was able to observe that the evaluated equipment presents satisfactory uniformity indices, where all obtained averages above 80%, although the irrigation efficiency in most of the irrigated area is below the recommended, with values lower than 67.5 %. In addition, when comparing the data from the uniformity test, soil characteristics, weather and relief, there is evidence that the relief is the main responsible for the deviations in the EA, since the irregular relief directly interferes with the service pressure of the sprinklers, causing variations in the intensity of application in certain areas. Keywords: Irrigation systems, performance evaluation, application efficiency