Characterisation of evaporation and drift losses with centre pivots

• Autores: J. N. Ortiz, José María Tarjuelo Martín-Benito, J.A. de Juan
• Localización: Agricultural water management: an international journal, ISSN 0378-3774, Vol. 96, Nº. 11, 2009, págs. 1541-1546
• Idioma: inglés
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• Dialnet Métricas: 1 Cita
• Resumen

  • The objective of this paper is to study evaporation and drift losses (EDLs) with two types of sprinklers: rotating spray plate sprinklers (RSPS) and fixed spray plate sprinklers (FSPS), both installed at two different heights (1 and 2.5 m above the ground). A field test was carried out during three seasons at an irrigated plot with a centre pivot, in Albacete (Spain). The results show that EDLs were significantly higher with the FSPS placed 2.5 m above the ground (FSPS 2.5) than with the RSPS placed 1 m above the ground (RSPS 1). The EDLs obtained for the FSPS 2.5 combination were 8% for night irrigation events and 13.7% for daytime irrigation events. The lowest EDL values were registered with RSPS 1, ranging from 3.3 to 8.2% under night and day operation conditions, respectively. These results were obtained for an average wind speed of 1.3 m/s at night and 3.5 m/s during the day, and were normally below 5 m/s.