Maximum length of subsurface drip irrigation laterals subjected to backpressure
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/50203 |
Resumo: | To achieve a better SDI system design, the emitters’ hydraulic characteristics and the flowrate uniformity along lateral lines under backpressure influence must be known. The objective of this study was to evaluate the effect of backpressure on the maximum length of irrigation laterals using two types of emitters (pressure-compensating and nonpressure-compensating) in different situations. Data from a field experiment combined with information obtained from a previously published paper was used, that tested driplines hydraulics behavior influenced by backpressure. The lateral dripline design technique based on statistical approach developed by Anyoji & Wu 1987 was used to calculate the maximum length. The variables that most influenced the maximum length of the laterals were the terrain slope and permissible flowrate variation. For nonpressure-compensating emitters, the maximum length of the irrigation laterals is up to 5% greater in subsurface applications than in surface applications. For pressure-compensating emitters operating under the influence of backpressure, there is an increase in the discharge exponent due to the small difference in flowrate between the surface and subsurface conditions, which also increases the influence of pressure variations on the flowrate thus, the surface laterals are up to 8% longer than the subsurface ones. |
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Maximum length of subsurface drip irrigation laterals subjected to backpressureDischarge exponentDriplineFlow rate coefficient of variationIrrigation line hydraulicsLateral designExpoente de descargaIrrigação por GotejamentoCoeficiente de Variação de gotejadoresLinha lateralTo achieve a better SDI system design, the emitters’ hydraulic characteristics and the flowrate uniformity along lateral lines under backpressure influence must be known. The objective of this study was to evaluate the effect of backpressure on the maximum length of irrigation laterals using two types of emitters (pressure-compensating and nonpressure-compensating) in different situations. Data from a field experiment combined with information obtained from a previously published paper was used, that tested driplines hydraulics behavior influenced by backpressure. The lateral dripline design technique based on statistical approach developed by Anyoji & Wu 1987 was used to calculate the maximum length. The variables that most influenced the maximum length of the laterals were the terrain slope and permissible flowrate variation. For nonpressure-compensating emitters, the maximum length of the irrigation laterals is up to 5% greater in subsurface applications than in surface applications. For pressure-compensating emitters operating under the influence of backpressure, there is an increase in the discharge exponent due to the small difference in flowrate between the surface and subsurface conditions, which also increases the influence of pressure variations on the flowrate thus, the surface laterals are up to 8% longer than the subsurface ones.Academia Brasileira de Ciências2022-06-13T21:24:02Z2022-06-13T21:24:02Z2021-03info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfTHEBALDI, M. S.; RODRIGUES, K. V.; TAMBO, F. L. R. Maximum length of subsurface drip irrigation laterals subjected to backpressure. Anais da Academia Brasileira de Ciências, Rio de Janeiro, v. 93, n. 1, e20191338, 2021. DOI: 10.1590/0001-3765202120191338.http://repositorio.ufla.br/jspui/handle/1/50203Anais da Academia Brasileira de Ciências/ Annals of the Brazilian Academy of Sciencesreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessThebaldi, Michael S.Rodrigues, karina V.Tambo, Fidel Luís R.eng2022-06-13T21:25:13Zoai:localhost:1/50203Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2022-06-13T21:25:13Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Maximum length of subsurface drip irrigation laterals subjected to backpressure |
title |
Maximum length of subsurface drip irrigation laterals subjected to backpressure |
spellingShingle |
Maximum length of subsurface drip irrigation laterals subjected to backpressure Thebaldi, Michael S. Discharge exponent Dripline Flow rate coefficient of variation Irrigation line hydraulics Lateral design Expoente de descarga Irrigação por Gotejamento Coeficiente de Variação de gotejadores Linha lateral |
title_short |
Maximum length of subsurface drip irrigation laterals subjected to backpressure |
title_full |
Maximum length of subsurface drip irrigation laterals subjected to backpressure |
title_fullStr |
Maximum length of subsurface drip irrigation laterals subjected to backpressure |
title_full_unstemmed |
Maximum length of subsurface drip irrigation laterals subjected to backpressure |
title_sort |
Maximum length of subsurface drip irrigation laterals subjected to backpressure |
author |
Thebaldi, Michael S. |
author_facet |
Thebaldi, Michael S. Rodrigues, karina V. Tambo, Fidel Luís R. |
author_role |
author |
author2 |
Rodrigues, karina V. Tambo, Fidel Luís R. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Thebaldi, Michael S. Rodrigues, karina V. Tambo, Fidel Luís R. |
dc.subject.por.fl_str_mv |
Discharge exponent Dripline Flow rate coefficient of variation Irrigation line hydraulics Lateral design Expoente de descarga Irrigação por Gotejamento Coeficiente de Variação de gotejadores Linha lateral |
topic |
Discharge exponent Dripline Flow rate coefficient of variation Irrigation line hydraulics Lateral design Expoente de descarga Irrigação por Gotejamento Coeficiente de Variação de gotejadores Linha lateral |
description |
To achieve a better SDI system design, the emitters’ hydraulic characteristics and the flowrate uniformity along lateral lines under backpressure influence must be known. The objective of this study was to evaluate the effect of backpressure on the maximum length of irrigation laterals using two types of emitters (pressure-compensating and nonpressure-compensating) in different situations. Data from a field experiment combined with information obtained from a previously published paper was used, that tested driplines hydraulics behavior influenced by backpressure. The lateral dripline design technique based on statistical approach developed by Anyoji & Wu 1987 was used to calculate the maximum length. The variables that most influenced the maximum length of the laterals were the terrain slope and permissible flowrate variation. For nonpressure-compensating emitters, the maximum length of the irrigation laterals is up to 5% greater in subsurface applications than in surface applications. For pressure-compensating emitters operating under the influence of backpressure, there is an increase in the discharge exponent due to the small difference in flowrate between the surface and subsurface conditions, which also increases the influence of pressure variations on the flowrate thus, the surface laterals are up to 8% longer than the subsurface ones. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-03 2022-06-13T21:24:02Z 2022-06-13T21:24:02Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
THEBALDI, M. S.; RODRIGUES, K. V.; TAMBO, F. L. R. Maximum length of subsurface drip irrigation laterals subjected to backpressure. Anais da Academia Brasileira de Ciências, Rio de Janeiro, v. 93, n. 1, e20191338, 2021. DOI: 10.1590/0001-3765202120191338. http://repositorio.ufla.br/jspui/handle/1/50203 |
identifier_str_mv |
THEBALDI, M. S.; RODRIGUES, K. V.; TAMBO, F. L. R. Maximum length of subsurface drip irrigation laterals subjected to backpressure. Anais da Academia Brasileira de Ciências, Rio de Janeiro, v. 93, n. 1, e20191338, 2021. DOI: 10.1590/0001-3765202120191338. |
url |
http://repositorio.ufla.br/jspui/handle/1/50203 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Academia Brasileira de Ciências |
publisher.none.fl_str_mv |
Academia Brasileira de Ciências |
dc.source.none.fl_str_mv |
Anais da Academia Brasileira de Ciências/ Annals of the Brazilian Academy of Sciences reponame:Repositório Institucional da UFLA instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Repositório Institucional da UFLA |
collection |
Repositório Institucional da UFLA |
repository.name.fl_str_mv |
Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
_version_ |
1807835065255723008 |