Resumo

CEZAR-DE-LIMA, Aureo; CAMARGO-GUIMARAES-JR., Sebastião; FIETZ, Carlos R.  e  CAMACHO, José R.. Energetic flow and efficiency indicators in center pivot irrigation. Agrociencia [online]. 2008, vol.42, n.8, pp.869-880. ISSN 2521-9766.

With an irrigated area of approximately 710.6 thousand ha, an annual consumption of 1928 GWh is calculated in the systems of center pivot irrigation installed in Brazil. Considering the need to reduce production costs in this paper, the energies are stratified in center pivot and indicators are proposed that associate energetic efficiency to hydric efficiency and make it possible to compare the irrigation systems under different topographic conditions. These indicators were applied to three irrigation systems where normalized specific consumptions were verified, varying between 12.89 and 31.24 kWh mm^-1 ha^-1 10^-1 m^-1, and irrigation efficiencies between 8.7% and 21.1%.

Palavras-chave : Specific consumption; evaluation; yield; sprinkler irrigation.

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