Determination of unsaturated hydraulic conductivity and sorptivity of a soil using a disk permeameter

Detalhes bibliográficos
Autor(a) principal: Borges, Edvane
Data de Publicação: 1999
Outros Autores: Antonino, Antonio Celso Dantas, Olio, Attilio Dall, Audry, Pierre, Carneiro, Clemente José Gusmão
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/5544
Resumo: Sorptivity and hydraulic conductivity were determined by two methods using disc permeameters. Infiltration experiments were carried out on three horizons of a representative soil of the semi-arid region, located in Santa Maria da Boa Vista, State of Pernambuco, Brazil. Water was supplied to this soil by disc permeameters at potentials of 0, -2.5, -5 and -10 cm of water. In the first method, hydraulic conductivity was measured using estimates of sorptivity and steady state fluxes. In the second, sorptivity and hydraulic conductivity were determined using measurements of steady state fluxes with two disc permeameters of different radius. Results of the second method, regarding characteristic times and characteristic pore radius, were more consistent than those of the first one. Sorptivity was as important as hydraulic conductivity to characterize the infiltration process. The abrupt reduction of the characteristic pore radius in the horizon A2/B with changes in the water supply potential indicates the structure heterogeneity of this horizon and allows the identification of the role of the clay compact volumes on the infiltration process.
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spelling Determination of unsaturated hydraulic conductivity and sorptivity of a soil using a disk permeameterDeterminação da condutividade hidráulica e da sorvidade de um solo não-saturado utilizando-se permeâmetro a discopermeameter; infiltrationpermeâmetro; infiltraçãoSorptivity and hydraulic conductivity were determined by two methods using disc permeameters. Infiltration experiments were carried out on three horizons of a representative soil of the semi-arid region, located in Santa Maria da Boa Vista, State of Pernambuco, Brazil. Water was supplied to this soil by disc permeameters at potentials of 0, -2.5, -5 and -10 cm of water. In the first method, hydraulic conductivity was measured using estimates of sorptivity and steady state fluxes. In the second, sorptivity and hydraulic conductivity were determined using measurements of steady state fluxes with two disc permeameters of different radius. Results of the second method, regarding characteristic times and characteristic pore radius, were more consistent than those of the first one. Sorptivity was as important as hydraulic conductivity to characterize the infiltration process. The abrupt reduction of the characteristic pore radius in the horizon A2/B with changes in the water supply potential indicates the structure heterogeneity of this horizon and allows the identification of the role of the clay compact volumes on the infiltration process.Dois métodos, utilizando permeâmetros a disco, foram usados para medir a sorvidade e a condutividade hidráulica em três horizontes de um solo de Santa Maria da Boa Vista, Pernambuco, utilizando-se potenciais de fornecimento de água de 0, -2,5, -5 e -10 cm de água. No primeiro método, a condutividade hidráulica foi obtida através de estimativas da sorvidade e do fluxo estacionário, utilizando-se apenas um permeâmetro. No segundo, as medidas da sorvidade e da condutividade hidráulica foram feitas utilizando-se valores dos fluxos estacionários, obtidos a partir de dois permeâmetros de diferentes raios. Esse segundo método apresentou resultados mais consistentes dos tempos - gravitacional e geométrico -, e do raio característico de poros que o primeiro método. A sorvidade foi tão importante quanto a condutividade hidráulica para caracterizar o processo de infiltração. A redução brusca dos valores dos raios característicos de poros do horizonte A2/B, com mudanças no potencial de fornecimento de água, revelou a heterogeneidade da estrutura deste horizonte, permitindo identificar a influência dos volumes argilosos compactados sobre o processo de infiltração.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraBorges, EdvaneAntonino, Antonio Celso DantasOlio, Attilio DallAudry, PierreCarneiro, Clemente José Gusmão1999-11-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/5544Pesquisa Agropecuaria Brasileira; v.34, n.11, nov. 1999; 2083-2089Pesquisa Agropecuária Brasileira; v.34, n.11, nov. 1999; 2083-20891678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/5544/2735info:eu-repo/semantics/openAccess2010-07-07T19:28:28Zoai:ojs.seer.sct.embrapa.br:article/5544Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2010-07-07T19:28:28Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Determination of unsaturated hydraulic conductivity and sorptivity of a soil using a disk permeameter
Determinação da condutividade hidráulica e da sorvidade de um solo não-saturado utilizando-se permeâmetro a disco
title Determination of unsaturated hydraulic conductivity and sorptivity of a soil using a disk permeameter
spellingShingle Determination of unsaturated hydraulic conductivity and sorptivity of a soil using a disk permeameter
Borges, Edvane
permeameter; infiltration
permeâmetro; infiltração
title_short Determination of unsaturated hydraulic conductivity and sorptivity of a soil using a disk permeameter
title_full Determination of unsaturated hydraulic conductivity and sorptivity of a soil using a disk permeameter
title_fullStr Determination of unsaturated hydraulic conductivity and sorptivity of a soil using a disk permeameter
title_full_unstemmed Determination of unsaturated hydraulic conductivity and sorptivity of a soil using a disk permeameter
title_sort Determination of unsaturated hydraulic conductivity and sorptivity of a soil using a disk permeameter
author Borges, Edvane
author_facet Borges, Edvane
Antonino, Antonio Celso Dantas
Olio, Attilio Dall
Audry, Pierre
Carneiro, Clemente José Gusmão
author_role author
author2 Antonino, Antonio Celso Dantas
Olio, Attilio Dall
Audry, Pierre
Carneiro, Clemente José Gusmão
author2_role author
author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Borges, Edvane
Antonino, Antonio Celso Dantas
Olio, Attilio Dall
Audry, Pierre
Carneiro, Clemente José Gusmão
dc.subject.por.fl_str_mv permeameter; infiltration
permeâmetro; infiltração
topic permeameter; infiltration
permeâmetro; infiltração
description Sorptivity and hydraulic conductivity were determined by two methods using disc permeameters. Infiltration experiments were carried out on three horizons of a representative soil of the semi-arid region, located in Santa Maria da Boa Vista, State of Pernambuco, Brazil. Water was supplied to this soil by disc permeameters at potentials of 0, -2.5, -5 and -10 cm of water. In the first method, hydraulic conductivity was measured using estimates of sorptivity and steady state fluxes. In the second, sorptivity and hydraulic conductivity were determined using measurements of steady state fluxes with two disc permeameters of different radius. Results of the second method, regarding characteristic times and characteristic pore radius, were more consistent than those of the first one. Sorptivity was as important as hydraulic conductivity to characterize the infiltration process. The abrupt reduction of the characteristic pore radius in the horizon A2/B with changes in the water supply potential indicates the structure heterogeneity of this horizon and allows the identification of the role of the clay compact volumes on the infiltration process.
publishDate 1999
dc.date.none.fl_str_mv 1999-11-01
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/5544
url https://seer.sct.embrapa.br/index.php/pab/article/view/5544
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/5544/2735
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.34, n.11, nov. 1999; 2083-2089
Pesquisa Agropecuária Brasileira; v.34, n.11, nov. 1999; 2083-2089
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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