Abstract

JIMENEZ ESPINOSA, Ezequiel R; GONZALEZ BAUCELLS, Pedro  and  DOMINGUEZ GONZALEZ, Miguel. Relationship between irrigation uniformity parameters in center pivot machines . Rev Cie Téc Agr [online]. 2012, vol.21, n.3, pp. 18-22. ISSN 2071-0054.

The study was carried out in 16 irrigation machines of different foreign enterprises in the provinces Artemisa, Mayabeque and Matanzas of Cuba. The used emitters were Spray Nelson D3000, Spray Senninger, Super Spray and Spray IIRD of the Research Institute of Irrigation and Drainage, actually Research Institute of Agricultural Engineering (IAgric).  The used standard to carry out the field test was NC ISO 11545: 2005. The parameters Coefficient of uniformity by Heermann and Hein (CU_h), Coefficient of uniformity of variation by Bremond and Molle (CU_V) and distribution Uniformity (DU_25%) were determined, and their graphic relationship with the Area Watered Appropriately (AWA) with the objective of valuing the irrigation uniformity. Also, relationship between the parameters mentioned and the speed of the wind (S.W) were established. As a result, in general, high values of CU_h were obtained, except in six machines that it could be associated to the incorrect distribution of nozzles. Low association exists between the parameters of irrigation uniformity and the AWA, for what is imposed to study the uniformity for tracts (between towers) to see in that areas of the machines are problems in the distribution of the water. Was also obtained that incidence of the S.W in the parameters AWA, CU_h, DU_25%, and CU_V, doesn't exist, coinciding with other authors. 

Keywords : coefficient of uniformity; distribution uniformity; pivot; spray.

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