Emitter discharge variability of subsurface drip irrigation in uniform soils: effect on water-application uniformity

Gil Rodríguez, María; Rodríguez Sinobas, Leonor; Juana Sirgado, Luis; Sánchez Calvo, Raúl y Losada Villasante, Alberto (2008). Emitter discharge variability of subsurface drip irrigation in uniform soils: effect on water-application uniformity. "Irrigation Science", v. 26 (n. 6); pp. 451-458. ISSN 0342-7188. https://doi.org/10.1007/s00271-008-0116-1.

Descripción

Título: Emitter discharge variability of subsurface drip irrigation in uniform soils: effect on water-application uniformity
Autor/es:
  • Gil Rodríguez, María
  • Rodríguez Sinobas, Leonor
  • Juana Sirgado, Luis
  • Sánchez Calvo, Raúl
  • Losada Villasante, Alberto
Tipo de Documento: Artículo
Título de Revista/Publicación: Irrigation Science
Fecha: Septiembre 2008
Volumen: 26
Materias:
Escuela: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Departamento: Ingeniería Rural [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Emitter discharge of subsurface drip irrigation (SDI) decreases as a result of the overpressure in the soil water at the discharge orifice. In this paper, the variation in dripper discharge in SDI laterals is studied. First, the emitter coefficient of flow variation CVq was measured in laboratory experiments with drippers of 2 and 4 L/h that were laid both on the soil and beneath it. Additionally, the soil pressure coefficient of variation CVhs was measured in buried emitters. Then, the irrigation uniformity was simulated in SDI and surface irrigation laterals under the same operating conditions and uniform soils; sandy and loamy. CVq was similar for the compensating models of both the surface and subsurface emitters. However, CVq decreased for the 2-L/h non-compensating model in the loamy soil. This shows a possible self-regulation of non-compensating emitter discharge in SDI, due to the interaction between effects of emitter discharge and soil pressure. This resulted in the irrigation uniformity of SDI non-compensating emitters to be greater than surface drip irrigation. The uniformity with pressure-compensating emitters would be similar in both cases, provided the overpressures in SDI are less than or equal to the compensation range lower limit.

Más información

ID de Registro: 2844
Identificador DC: http://oa.upm.es/2844/
Identificador OAI: oai:oa.upm.es:2844
Identificador DOI: 10.1007/s00271-008-0116-1
URL Oficial: http://www.springerlink.com/content/xj40l8827201/?p=30feadde62c843b0a01f4f6873c55f54&pi=10
Depositado por: Memoria Investigacion
Depositado el: 15 Abr 2010 09:40
Ultima Modificación: 20 Abr 2016 12:29
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