Unsaturated flow effects on solute transport in porous media
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 UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jhydrol.2021.126301 http://hdl.handle.net/11449/206201 |
Resumo: | A major contaminant transport process in soils is hydrodynamic dispersion by affecting the spreading and arrival of surface-applied pollutants at underlying groundwater reservoirs. When a soil is unsaturated, hydrodynamic dispersion is very much affected by soil water saturation. Centimeter- and decimeter-scale column experiments were carried out to explore the effects of fluid saturation and particle size on the unsaturated solute dispersivity. Measured in-situ breakthrough curves were analyzed in terms of both classical advection–dispersion and dual-porosity (mobile-immobile) type transport equations. A clear non-monotonic relationship was found between the dispersivity and soil water saturation. The extent of non-monotonicity was more pronounced for a relatively coarse-textured sand compared to a finer sand. This finding has been reported rarely before; it explains some of the inconsistencies of saturation-dispersivity relationships in the literature. |
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Unsaturated flow effects on solute transport in porous mediaDispersionDispersivitySolute transportUnsaturated zoneA major contaminant transport process in soils is hydrodynamic dispersion by affecting the spreading and arrival of surface-applied pollutants at underlying groundwater reservoirs. When a soil is unsaturated, hydrodynamic dispersion is very much affected by soil water saturation. Centimeter- and decimeter-scale column experiments were carried out to explore the effects of fluid saturation and particle size on the unsaturated solute dispersivity. Measured in-situ breakthrough curves were analyzed in terms of both classical advection–dispersion and dual-porosity (mobile-immobile) type transport equations. A clear non-monotonic relationship was found between the dispersivity and soil water saturation. The extent of non-monotonicity was more pronounced for a relatively coarse-textured sand compared to a finer sand. This finding has been reported rarely before; it explains some of the inconsistencies of saturation-dispersivity relationships in the literature.National Natural Science Foundation of ChinaSchool of Civil Engineering Sun Yat-sen UniversitySouthern Marine Science and Engineering Guangdong Laboratory (Zhuhai)Department of Earth Sciences Utrecht University, P.O. Box 80021Department of Watershed and Rangeland Management Gonbad Kavous UniversityCenter for Environmental Studies São Paulo State University UNESPCenter for Environmental Studies São Paulo State University UNESPNational Natural Science Foundation of China: 42007165National Natural Science Foundation of China: 51822908Sun Yat-sen UniversitySouthern Marine Science and Engineering Guangdong Laboratory (Zhuhai)Utrecht UniversityGonbad Kavous UniversityUniversidade Estadual Paulista (Unesp)Zhuang, LuwenRaoof, AmirMahmoodlu, Mojtaba G.Biekart, Sarade Witte, RiemerBadi, Lubnavan Genuchten, Martinus Th. [UNESP]Lin, Kairong2021-06-25T10:28:12Z2021-06-25T10:28:12Z2021-07-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.jhydrol.2021.126301Journal of Hydrology, v. 598.0022-1694http://hdl.handle.net/11449/20620110.1016/j.jhydrol.2021.1263012-s2.0-85104285144Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Hydrologyinfo:eu-repo/semantics/openAccess2021-10-22T22:17:30Zoai:repositorio.unesp.br:11449/206201Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:39:35.931002Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Unsaturated flow effects on solute transport in porous media |
title |
Unsaturated flow effects on solute transport in porous media |
spellingShingle |
Unsaturated flow effects on solute transport in porous media Zhuang, Luwen Dispersion Dispersivity Solute transport Unsaturated zone |
title_short |
Unsaturated flow effects on solute transport in porous media |
title_full |
Unsaturated flow effects on solute transport in porous media |
title_fullStr |
Unsaturated flow effects on solute transport in porous media |
title_full_unstemmed |
Unsaturated flow effects on solute transport in porous media |
title_sort |
Unsaturated flow effects on solute transport in porous media |
author |
Zhuang, Luwen |
author_facet |
Zhuang, Luwen Raoof, Amir Mahmoodlu, Mojtaba G. Biekart, Sara de Witte, Riemer Badi, Lubna van Genuchten, Martinus Th. [UNESP] Lin, Kairong |
author_role |
author |
author2 |
Raoof, Amir Mahmoodlu, Mojtaba G. Biekart, Sara de Witte, Riemer Badi, Lubna van Genuchten, Martinus Th. [UNESP] Lin, Kairong |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Sun Yat-sen University Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Utrecht University Gonbad Kavous University Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Zhuang, Luwen Raoof, Amir Mahmoodlu, Mojtaba G. Biekart, Sara de Witte, Riemer Badi, Lubna van Genuchten, Martinus Th. [UNESP] Lin, Kairong |
dc.subject.por.fl_str_mv |
Dispersion Dispersivity Solute transport Unsaturated zone |
topic |
Dispersion Dispersivity Solute transport Unsaturated zone |
description |
A major contaminant transport process in soils is hydrodynamic dispersion by affecting the spreading and arrival of surface-applied pollutants at underlying groundwater reservoirs. When a soil is unsaturated, hydrodynamic dispersion is very much affected by soil water saturation. Centimeter- and decimeter-scale column experiments were carried out to explore the effects of fluid saturation and particle size on the unsaturated solute dispersivity. Measured in-situ breakthrough curves were analyzed in terms of both classical advection–dispersion and dual-porosity (mobile-immobile) type transport equations. A clear non-monotonic relationship was found between the dispersivity and soil water saturation. The extent of non-monotonicity was more pronounced for a relatively coarse-textured sand compared to a finer sand. This finding has been reported rarely before; it explains some of the inconsistencies of saturation-dispersivity relationships in the literature. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T10:28:12Z 2021-06-25T10:28:12Z 2021-07-01 |
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 |
http://dx.doi.org/10.1016/j.jhydrol.2021.126301 Journal of Hydrology, v. 598. 0022-1694 http://hdl.handle.net/11449/206201 10.1016/j.jhydrol.2021.126301 2-s2.0-85104285144 |
url |
http://dx.doi.org/10.1016/j.jhydrol.2021.126301 http://hdl.handle.net/11449/206201 |
identifier_str_mv |
Journal of Hydrology, v. 598. 0022-1694 10.1016/j.jhydrol.2021.126301 2-s2.0-85104285144 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Hydrology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128962788851712 |