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handle: 10261/5697
[ES] Se presentan los resultados de una serie de evaluaciones de la uniformidad del riego por aspersión realizadas durante los años 87, 88 y 99 en la Loma de Quinto y en sus principales sistemas de riego (cobertura, pivote y laterales de avance frontal). Los valores de los coeficientes de uniformidad (CU) de Christiansen han r esultado ser muy variables en las coberturas fijas. La media obtenida en este tipo de sistema es considerada relativamente baja. Se ha visto que la uniformidad del riego depende principalmente del marco. La uniformidad está afectada además por otros factores como la duración del riego, la presión de funcionamiento y la velocidad del viento. Un factor que podría ser relevante es el racheado del viento. Los laterales de avance frontal presentan la mejor uniformidad (80%) de entre los tres sistemas considerados. En pivotes y laterales se obtuvo un valor particularmente alto del CU en las máquinas en las que se han bajado las boquillas y en las que se regó con una velocidad del viento de entre 2 y 6 m/s.
[EN] The results of sprinkler irrigation evaluations performed at the Loma de Quinto District are reported in this paper. The evaluations were performed during the 87, 88, 99 irrigation seasons in the main irrigation systems of the district (solid sets, linear- move and centre-pivot sprinkler machines) . Results show that the values of Christiansen's Coefficient of uniformity (CU) were variable for solid sets. Their average CU was considered relatively low. Irrigation uniformity depends mainly on the sprinkler spacing. Other factors that have shown a rel evant effect on uniformity are irrigation duration, pressure and wind speed. The time variability in the wind direction and intensity could have a relevant effect too. Linear- move sprinkler irrigation machines showed the best average CU (80%). The highest values of CU were obtained in irrigation machines in which the emitters had been lowered by the farmers and when the wind speed ranged between 2 and 6 m/s.
En XVIII Congreso Nacional de Riegos, Huelva, 2000.
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