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| Titel |
Evolution of the spherical cavity radius generated around a subsurface drip emitter |
| VerfasserIn |
M. Gil, L. Rodríguez-Sinobas, R. Sánchez, L. Juana |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 7, no. 6 ; Nr. 7, no. 6 (2010-06-22), S.1983-1989 |
| Datensatznummer |
250004850
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| Publikation (Nr.) |
 copernicus.org/bg-7-1983-2010.pdf |
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| Zusammenfassung |
| The emitter discharge in subsurface drip irrigation can
be affected by soil properties. A positive pressure develops at the emitter
outlet where a spherical cavity is assumed to form. In steady-state
conditions, the pressure in the soil relates to soil hydraulic properties,
the emitter discharge, and the cavity radius. This pressure in the soil is
very sensitive to the cavity radius. In this paper, the development of the
cavity around the emitter outlet was measured for various emitter discharges
in laboratory tests carried out in containers with uniform loamy soils. A
trend between soil pressure and emitter discharge was established that
illustrates the performance of buried emitters in the field. Its application to the prediction of water distribution in
subsurface drip irrigation units and its effect on the estimation of
irrigation performance are also shown. |
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