Desenvolvimento de software para avaliação dos desempenhos hidráulico e econômico de pivôs centrais

• Autor(a) principal: Ludwig, Rafael [UNESP]
• Data de Publicação: 2015
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/139413; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/18-05-2016/000865198.pdf
• topic: Irrigação por aspersores; Agricultura e energia; Hidraulica; Recursos hídricos - Desenvolvimento; Programas de computador; Irrigation

The irrigated agriculture is dependent on electricity to increase the production and to be able to supply the markets' necessities, which is exigent and competitive. However, the lack of resources, such as water and electricity and the crescent rising of production cost, demand a rational use of these resources. The general objective of this thesis was to evaluate the influence of the terrain declivity in the pressure and in the energetic cost in an irrigation system with center pivot. In order to achieve this objective, a computational model was elaborated and tested using the programming language Pascal through the software Delphi. A database created in Access 2013 was associated in this model. It is a research developed in a partnership among the Departamento de Engenharia Rural da Faculdade de Ciências Agronômicas - FCA -UNESP, the Escuela de Ingenieros Agronomos da Universidad Politécnica de Madrid - EIA-UPM, and the Associação do Sudoeste Paulista de Irrigantes e Plantio na Palha - ASPIPP, located in the district of Campos de Holambra in Parapanema - SP. The validation of the software was made by selecting a center pivot located in the watershed of the Boi Branco stream, situated in the sub-basin 8 (Ribeirão das Posses/Rio Paranapanema, SP) of the Unidade de Gerenciamento de Recursos Hídricos Alto Paranapanema (UGRHI 14), located in the south-west of the São Paulo state. The results show that the software is an alternative to the validation of the performance and operation of irrigation system with center pivot. Moreover, it allows the users to analyze the possibility of intervention in the flow rate and pressure to reduce operational costs, demonstrated by three possibilities of intervention (Percentimetro indicado, Percentimetro mínimo e Percentimetro ideal) considering the blade and the energetic consumption.