Field determined variation of the unsaturated hydraulic conductivity functions using simplified analysis of internal drainage experiments

Detalhes bibliográficos
Autor(a) principal: Villagra,M. M.
Data de Publicação: 1994
Outros Autores: Michiels,P., Hartmann,R., Bacchi,O.O.S., Reichardt,K.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Scientia Agrícola (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161994000100018
Resumo: Experimentally determined values of unsaturated soil hydraulic conductivity are presented for an Alfisol of the county of Piracicaba, S.P., Brazil. Simultaneous measurements of soil water content and pressure head are made along a 125 m transect within an irrigated field during the internal drainage process. Calculations of the soil hydraulic conductivity were made using the instantaneous profile method (Watson, 1966) and the unit gradient method (LIBARDI et al., 1980). The spatial variability of the soil hydraulic conductivity manifested along the transect indicates the need to develop a field method to measure K(theta) within prescribed fiducial limits, taking into account quantitative evaluation of spatial and temporal variances associated with the mathematical model, instrument calibration and soil properties.
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spelling Field determined variation of the unsaturated hydraulic conductivity functions using simplified analysis of internal drainage experimentssoil variabilityhydraulic conductivityExperimentally determined values of unsaturated soil hydraulic conductivity are presented for an Alfisol of the county of Piracicaba, S.P., Brazil. Simultaneous measurements of soil water content and pressure head are made along a 125 m transect within an irrigated field during the internal drainage process. Calculations of the soil hydraulic conductivity were made using the instantaneous profile method (Watson, 1966) and the unit gradient method (LIBARDI et al., 1980). The spatial variability of the soil hydraulic conductivity manifested along the transect indicates the need to develop a field method to measure K(theta) within prescribed fiducial limits, taking into account quantitative evaluation of spatial and temporal variances associated with the mathematical model, instrument calibration and soil properties.Escola Superior de Agricultura "Luiz de Queiroz"1994-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161994000100018Scientia Agricola v.51 n.1 1994reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0103-90161994000100018info:eu-repo/semantics/openAccessVillagra,M. M.Michiels,P.Hartmann,R.Bacchi,O.O.S.Reichardt,K.eng2005-07-27T00:00:00Zoai:scielo:S0103-90161994000100018Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2005-07-27T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Field determined variation of the unsaturated hydraulic conductivity functions using simplified analysis of internal drainage experiments
title Field determined variation of the unsaturated hydraulic conductivity functions using simplified analysis of internal drainage experiments
spellingShingle Field determined variation of the unsaturated hydraulic conductivity functions using simplified analysis of internal drainage experiments
Villagra,M. M.
soil variability
hydraulic conductivity
title_short Field determined variation of the unsaturated hydraulic conductivity functions using simplified analysis of internal drainage experiments
title_full Field determined variation of the unsaturated hydraulic conductivity functions using simplified analysis of internal drainage experiments
title_fullStr Field determined variation of the unsaturated hydraulic conductivity functions using simplified analysis of internal drainage experiments
title_full_unstemmed Field determined variation of the unsaturated hydraulic conductivity functions using simplified analysis of internal drainage experiments
title_sort Field determined variation of the unsaturated hydraulic conductivity functions using simplified analysis of internal drainage experiments
author Villagra,M. M.
author_facet Villagra,M. M.
Michiels,P.
Hartmann,R.
Bacchi,O.O.S.
Reichardt,K.
author_role author
author2 Michiels,P.
Hartmann,R.
Bacchi,O.O.S.
Reichardt,K.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Villagra,M. M.
Michiels,P.
Hartmann,R.
Bacchi,O.O.S.
Reichardt,K.
dc.subject.por.fl_str_mv soil variability
hydraulic conductivity
topic soil variability
hydraulic conductivity
description Experimentally determined values of unsaturated soil hydraulic conductivity are presented for an Alfisol of the county of Piracicaba, S.P., Brazil. Simultaneous measurements of soil water content and pressure head are made along a 125 m transect within an irrigated field during the internal drainage process. Calculations of the soil hydraulic conductivity were made using the instantaneous profile method (Watson, 1966) and the unit gradient method (LIBARDI et al., 1980). The spatial variability of the soil hydraulic conductivity manifested along the transect indicates the need to develop a field method to measure K(theta) within prescribed fiducial limits, taking into account quantitative evaluation of spatial and temporal variances associated with the mathematical model, instrument calibration and soil properties.
publishDate 1994
dc.date.none.fl_str_mv 1994-04-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161994000100018
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161994000100018
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-90161994000100018
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Escola Superior de Agricultura "Luiz de Queiroz"
publisher.none.fl_str_mv Escola Superior de Agricultura "Luiz de Queiroz"
dc.source.none.fl_str_mv Scientia Agricola v.51 n.1 1994
reponame:Scientia Agrícola (Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Scientia Agrícola (Online)
collection Scientia Agrícola (Online)
repository.name.fl_str_mv Scientia Agrícola (Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv scientia@usp.br||alleoni@usp.br
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