Tracer test modeling for characterizing heterogeneity and local-sacle residence time distribution in an artificial recharge site.

Artificial recharge of aquifers is a technique for improving water quality and increasing groundwater resources. Understanding the fate of a potential contaminant requires knowledge of the residence time distribution (RTD) of the recharged water in the aquifer beneath. A simple way to obtain the RTD...

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Detalles Bibliográficos
Autores: Valhondo, Cristina, Martínez-Landa, Lurdes, Carrera, Jesús, Hidalgo, Juan J., Tubau, Isabel, De Pourcq, Katrien, Grau Martínez, Alba, Ayora, Carles
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/114786
Acceso en línea:https://hdl.handle.net/2445/114786
Access Level:acceso abierto
Palabra clave:Aqüífers
Explotació de recursos hidràulics
Models geològics
Aquifers
Water resources development
Geological modeling
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spelling Tracer test modeling for characterizing heterogeneity and local-sacle residence time distribution in an artificial recharge site.Valhondo, CristinaMartínez-Landa, LurdesCarrera, JesúsHidalgo, Juan J.Tubau, IsabelDe Pourcq, KatrienGrau Martínez, AlbaAyora, CarlesAqüífersExplotació de recursos hidràulicsModels geològicsAquifersWater resources developmentGeological modelingArtificial recharge of aquifers is a technique for improving water quality and increasing groundwater resources. Understanding the fate of a potential contaminant requires knowledge of the residence time distribution (RTD) of the recharged water in the aquifer beneath. A simple way to obtain the RTDs is to perform a tracer test. We performed a pulse injection tracer test in an artificial recharge system through an infiltration basin to obtain the breakthrough curves, which directly yield the RTDs. The RTDs turned out to be very broad and we used a numerical model to interpret them, to characterize heterogeneity, and to extend the model to other flow conditions. The model comprised nine layers at the site scaled to emulate the layering of aquifer deposits. Two types of hypotheses were considered: homogeneous (all flow and transport parameters identical for every layer) and heterogeneous (diverse parameters for each layer). The parameters were calibrated against the head and concentration data in both model types, which were validated quite satisfactorily against 1,1,2-Trichloroethane and electrical conductivity data collected over a long period of time with highly varying flow conditions. We found that the broad RTDs can be attributed to the complex flow structure generated under the basin due to three-dimensionality and time fluctuations (the homogeneous model produced broad RTDs) and the heterogeneity of the media (the heterogeneous model yielded much better fits).We conclude that heterogeneity must be acknowledged to properly assess mixing and broad RTDs, which are required to explain the water quality improvement of artificial recharge basins.European Geosciences Union (EGU)2016info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/114786Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.5194/hess-20-4209-2016Hydrology and Earth System Sciences, 2016, vol. 20, p. 4209-4221https://doi.org/10.5194/hess-20-4209-2016info:eu-repo/grantAgreement/EC/FP7/617511cc-by (c) Valhondo, Cristina et al., 2016http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1147862026-05-27T06:46:51Z
dc.title.none.fl_str_mv Tracer test modeling for characterizing heterogeneity and local-sacle residence time distribution in an artificial recharge site.
title Tracer test modeling for characterizing heterogeneity and local-sacle residence time distribution in an artificial recharge site.
spellingShingle Tracer test modeling for characterizing heterogeneity and local-sacle residence time distribution in an artificial recharge site.
Valhondo, Cristina
Aqüífers
Explotació de recursos hidràulics
Models geològics
Aquifers
Water resources development
Geological modeling
title_short Tracer test modeling for characterizing heterogeneity and local-sacle residence time distribution in an artificial recharge site.
title_full Tracer test modeling for characterizing heterogeneity and local-sacle residence time distribution in an artificial recharge site.
title_fullStr Tracer test modeling for characterizing heterogeneity and local-sacle residence time distribution in an artificial recharge site.
title_full_unstemmed Tracer test modeling for characterizing heterogeneity and local-sacle residence time distribution in an artificial recharge site.
title_sort Tracer test modeling for characterizing heterogeneity and local-sacle residence time distribution in an artificial recharge site.
dc.creator.none.fl_str_mv Valhondo, Cristina
Martínez-Landa, Lurdes
Carrera, Jesús
Hidalgo, Juan J.
Tubau, Isabel
De Pourcq, Katrien
Grau Martínez, Alba
Ayora, Carles
author Valhondo, Cristina
author_facet Valhondo, Cristina
Martínez-Landa, Lurdes
Carrera, Jesús
Hidalgo, Juan J.
Tubau, Isabel
De Pourcq, Katrien
Grau Martínez, Alba
Ayora, Carles
author_role author
author2 Martínez-Landa, Lurdes
Carrera, Jesús
Hidalgo, Juan J.
Tubau, Isabel
De Pourcq, Katrien
Grau Martínez, Alba
Ayora, Carles
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Aqüífers
Explotació de recursos hidràulics
Models geològics
Aquifers
Water resources development
Geological modeling
topic Aqüífers
Explotació de recursos hidràulics
Models geològics
Aquifers
Water resources development
Geological modeling
description Artificial recharge of aquifers is a technique for improving water quality and increasing groundwater resources. Understanding the fate of a potential contaminant requires knowledge of the residence time distribution (RTD) of the recharged water in the aquifer beneath. A simple way to obtain the RTDs is to perform a tracer test. We performed a pulse injection tracer test in an artificial recharge system through an infiltration basin to obtain the breakthrough curves, which directly yield the RTDs. The RTDs turned out to be very broad and we used a numerical model to interpret them, to characterize heterogeneity, and to extend the model to other flow conditions. The model comprised nine layers at the site scaled to emulate the layering of aquifer deposits. Two types of hypotheses were considered: homogeneous (all flow and transport parameters identical for every layer) and heterogeneous (diverse parameters for each layer). The parameters were calibrated against the head and concentration data in both model types, which were validated quite satisfactorily against 1,1,2-Trichloroethane and electrical conductivity data collected over a long period of time with highly varying flow conditions. We found that the broad RTDs can be attributed to the complex flow structure generated under the basin due to three-dimensionality and time fluctuations (the homogeneous model produced broad RTDs) and the heterogeneity of the media (the heterogeneous model yielded much better fits).We conclude that heterogeneity must be acknowledged to properly assess mixing and broad RTDs, which are required to explain the water quality improvement of artificial recharge basins.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/114786
url https://hdl.handle.net/2445/114786
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.5194/hess-20-4209-2016
Hydrology and Earth System Sciences, 2016, vol. 20, p. 4209-4221
https://doi.org/10.5194/hess-20-4209-2016
info:eu-repo/grantAgreement/EC/FP7/617511
dc.rights.none.fl_str_mv cc-by (c) Valhondo, Cristina et al., 2016
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Valhondo, Cristina et al., 2016
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv European Geosciences Union (EGU)
publisher.none.fl_str_mv European Geosciences Union (EGU)
dc.source.none.fl_str_mv Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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