Backpressure effects on emitters flow rate in subsurface drip irrigation

Autores

  • Michael Silveira Thebaldi Department of Water Resources, School of Engineering, Universidade Federal de Lavras - UFLA, MG, Brazil. https://orcid.org/0000-0002-4579-6714
  • Flávia Vilela Corrêa Graduate Program in Water Resources, Department of Water Resources, School of Engineering, Universidade Federal de Lavras - UFLA, MG, Brazil. https://orcid.org/0000-0001-5179-5577
  • Pâmela Rafanele França Pinto Undergraduate major in Environmental Engineering, Department of Environmental Engineering, School of Engineering, Universidade Federal de Lavras - UFLA, MG, Brazil https://orcid.org/0000-0002-6394-1217
  • Luiz Antonio Lima Department of Water Resources, School of Engineering, Universidade Federal de Lavras - UFLA, MG, Brazil. https://orcid.org/0000-0002-5542-6442
  • Adriano Valentim Diotto Department of Water Resources, School of Engineering, Universidade Federal de Lavras - UFLA, MG, Brazil. https://orcid.org/0000-0002-4019-2444
  • Fábio Ponciano De Deus Department of Water Resources, School of Engineering, Universidade Federal de Lavras - UFLA, MG, Brazil.

DOI:

https://doi.org/10.18011/bioeng.2022.v16.1093

Palavras-chave:

Irrigation engineering, Irrigation lateral lines hydraulics, Irrigation management, Trickle irrigation

Resumo

Subsurface drip irrigation success depends on surpassing the backpressure obstacle, a phenomenon which occurs when the water application intensity exceeds the infiltration rate of soil, which reduces the emitter flow rate. Thus, this study aimed to determine the flow rate variation, in relation to surface flow, of four drip emitters when buried at two depths in a loam soil (Yolo Loam soil), and the backpressure generated by the soil on subsurface condition. The cavity radius developed around the emitters outlet was also obtained. The experiment was conducted in a completely randomized design, in a strip-plot scheme, with three treatments: installation depth of driplines (two levels: 0.10 and 0.20 m); dripline type (four levels: D5000, JardiLine, TalDrip and and Hydro PCND) and irrigation time (three levels: 0.5, 1.0 and 3.0 h). The results showed that the flow rate variation between the surface and subsurface application on Yolo Loam soil, with inlet pressure of 145 kPa, was greater the higher was the emitter flow rate. For pressure-compensating emitters, even under backpressure influence, this was not enough to cancel the pressure-compensating device operation, of the emitters. The emitters installation depth, as well the irrigation time, did not affect the backpressure and, consequently, the flow rate variation.

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Biografia do Autor

Michael Silveira Thebaldi, Department of Water Resources, School of Engineering, Universidade Federal de Lavras - UFLA, MG, Brazil.

Professor Adjunto da UFLA. Engenheiro Agrícola, Mestre e Doutor em Recursos Hídricos em Sistemas Agrícolas

Flávia Vilela Corrêa, Graduate Program in Water Resources, Department of Water Resources, School of Engineering, Universidade Federal de Lavras - UFLA, MG, Brazil.

Graduation student, Department of Water Resources, Universidade Federal de Lavras - UFLA

Pâmela Rafanele França Pinto, Undergraduate major in Environmental Engineering, Department of Environmental Engineering, School of Engineering, Universidade Federal de Lavras - UFLA, MG, Brazil

Undergraduation student, Department of Environmental Engineering, Universidade Federal de Lavras - UFLA.

Luiz Antonio Lima, Department of Water Resources, School of Engineering, Universidade Federal de Lavras - UFLA, MG, Brazil.

Professor, Department of Water Resources, Universidade Federal de Lavras, UFLA

Adriano Valentim Diotto, Department of Water Resources, School of Engineering, Universidade Federal de Lavras - UFLA, MG, Brazil.

Professor, Department of Water Resources, Universidade Federal de Lavras, UFLA

Fábio Ponciano De Deus, Department of Water Resources, School of Engineering, Universidade Federal de Lavras - UFLA, MG, Brazil.

Professor, Department of Water Resources, Universidade Federal de Lavras, UFLA

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Publicado

04-07-2022

Como Citar

Silveira Thebaldi, M., Vilela Corrêa, F. ., Rafanele França Pinto, P. ., Antonio Lima, L. ., Valentim Diotto, A. ., & Ponciano De Deus, F. . (2022). Backpressure effects on emitters flow rate in subsurface drip irrigation. Revista Brasileira De Engenharia De Biossistemas, 16. https://doi.org/10.18011/bioeng.2022.v16.1093

Edição

Seção

INOVAGRI Meeting 2021