Irrigar: aplicativo computacional para o dimensionamento econômico de sistemas de irrigação por aspersão convencional

Abstract

This work performed at the Faculty of Agricultural Sciences, Federal University of Great Golden State of Mato Grosso do Sul - Brazil is developing in Visual Basic computer application called Irrigate, specific program for the development of irrigation projects by sprinkler. Built with the purpose of facilitating the studies to maximize the economic efficiency of systems that need to consume utility power distribution Brazilian utilities. The application allows the analysis of any irrigation layout and conducts economic design of the hydraulic system distribution lines for cost analysis by the method of attempts with the aid of the Bresse equation. The losses of the continuous type are determined by universal Darcy-Weissbach, and the friction factor defined after comparison of the laminar film with absolute roughness the most appropriate equation between the proposals by Swamee, Blasius, Prandtl-Von Karman, Nikuradse, Konakov, Prandtl-Colebrook, Colebrook-White or Moody. The losses of the localized type can be estimated or calculated by the direct method. The computational Irrigate application was tested on a sample of the literature and showed good working performance. Their use has provided several other benefits, as time savings in preparation of the project, reducing the possibility of errors in the quantification of the solution and ease for the analysis and simulation of different conditions and alternatives of installing and operating the system. Thus, it was concluded that the use of technological resources can contribute significantly to enabling the use of this method of irrigation rationally for the benefit of agriculture.