A multidisciplinary approach to characterizing coastal alluvial aquifers to improve understanding of seawater intrusion and submarine groundwater discharge
Coastal aquifers are affected by seawater intrusion (SWI), which causes their salinization, and yield submarine groundwater discharge (SGD), which feeds marine ecosystems. Characterizing groundwater dynamics in coastal aquifers is fundamental for understanding both processes and their interaction. I...
| Autores: | , , , , , , , , , , , , , , , , , |
|---|---|
| Formato: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2022 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/306744 |
| Acesso em linha: | http://hdl.handle.net/10261/306744 https://api.elsevier.com/content/abstract/scopus_id/85124197418 |
| Access Level: | acceso abierto |
| Palavra-chave: | Hydrogeochemistry Borehole geophysics Coastal alluvial aquifer Conceptual model Geological heterogeneity http://metadata.un.org/sdg/6 Ensure availability and sustainable management of water and sanitation for all |
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A multidisciplinary approach to characterizing coastal alluvial aquifers to improve understanding of seawater intrusion and submarine groundwater discharge |
| title |
A multidisciplinary approach to characterizing coastal alluvial aquifers to improve understanding of seawater intrusion and submarine groundwater discharge |
| spellingShingle |
A multidisciplinary approach to characterizing coastal alluvial aquifers to improve understanding of seawater intrusion and submarine groundwater discharge Martínez-Pérez, Laura Hydrogeochemistry Borehole geophysics Coastal alluvial aquifer Conceptual model Geological heterogeneity http://metadata.un.org/sdg/6 Ensure availability and sustainable management of water and sanitation for all |
| title_short |
A multidisciplinary approach to characterizing coastal alluvial aquifers to improve understanding of seawater intrusion and submarine groundwater discharge |
| title_full |
A multidisciplinary approach to characterizing coastal alluvial aquifers to improve understanding of seawater intrusion and submarine groundwater discharge |
| title_fullStr |
A multidisciplinary approach to characterizing coastal alluvial aquifers to improve understanding of seawater intrusion and submarine groundwater discharge |
| title_full_unstemmed |
A multidisciplinary approach to characterizing coastal alluvial aquifers to improve understanding of seawater intrusion and submarine groundwater discharge |
| title_sort |
A multidisciplinary approach to characterizing coastal alluvial aquifers to improve understanding of seawater intrusion and submarine groundwater discharge |
| dc.creator.none.fl_str_mv |
Martínez-Pérez, Laura Luquot, Linda Carrera, Jesús Marazuela, Miguel Ángel Goyetche, Tybaud Pool, María Palacios, Andrea Bellmunt, Fabian Ledo, Juanjo Ferrer, Nuria del Val, Laura Pezard, Philippe A. García-Orellana, Jordi Diego-Feliu, Marc Rodellas, Valentí Saaltink, Maarten W. Vázquez-Suñé, Enric Folch, Albert |
| author |
Martínez-Pérez, Laura |
| author_facet |
Martínez-Pérez, Laura Luquot, Linda Carrera, Jesús Marazuela, Miguel Ángel Goyetche, Tybaud Pool, María Palacios, Andrea Bellmunt, Fabian Ledo, Juanjo Ferrer, Nuria del Val, Laura Pezard, Philippe A. García-Orellana, Jordi Diego-Feliu, Marc Rodellas, Valentí Saaltink, Maarten W. Vázquez-Suñé, Enric Folch, Albert |
| author_role |
author |
| author2 |
Luquot, Linda Carrera, Jesús Marazuela, Miguel Ángel Goyetche, Tybaud Pool, María Palacios, Andrea Bellmunt, Fabian Ledo, Juanjo Ferrer, Nuria del Val, Laura Pezard, Philippe A. García-Orellana, Jordi Diego-Feliu, Marc Rodellas, Valentí Saaltink, Maarten W. Vázquez-Suñé, Enric Folch, Albert |
| author2_role |
author author author author author author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Hydrogeochemistry Borehole geophysics Coastal alluvial aquifer Conceptual model Geological heterogeneity http://metadata.un.org/sdg/6 Ensure availability and sustainable management of water and sanitation for all |
| topic |
Hydrogeochemistry Borehole geophysics Coastal alluvial aquifer Conceptual model Geological heterogeneity http://metadata.un.org/sdg/6 Ensure availability and sustainable management of water and sanitation for all |
| description |
Coastal aquifers are affected by seawater intrusion (SWI), which causes their salinization, and yield submarine groundwater discharge (SGD), which feeds marine ecosystems. Characterizing groundwater dynamics in coastal aquifers is fundamental for understanding both processes and their interaction. In order to gain insights into SWI and SGD, we developed a 100 m-scale experimental field site located in a coastal alluvial aquifer at the mouth of an ephemeral stream on the Maresme coastline (Barcelona, Spain). Given the complexity of coastal aquifers and the dynamism of the processes occurring therein, understanding of the coupled processes can be achieved by combining methods and approaches across different hydrogeological disciplines. In this study, we conduct a detailed aquifer characterization based on the four pillars of hydrogeology: geology (lithological description and core samples analyses), geophysics (downhole and cross-hole measurements), hydraulics (pumping and tidal response tests) and hydrochemistry (major and minor elements, together with stable and Ra isotopes). Each discipline contributed to the characterization of the aquifer: (1) geological characterization revealed that the aquifer consists of fluvial sediments, organized in fining upwards sequences with alternating layers of gravel, sand and silt; (2) geophysics helped in identifying silt layers and their continuity, which play a segmenting role in the aquifer hydrodynamics; (3) hydraulics tests, specifically tidal response tests, evidenced that tidal loading, rather than hydraulic connection to the sea, drives the tidal response; and (4) hydrochemistry revealed a surprising high reactivity, as most ions reflect some reaction, beyond the expected cation exchange. The summary is that the aquifer, which initially looked like a homogeneous unconfined aquifer 22 m thick, effectively behaves as a multi-aquifer and reactive system with freshwater discharging beneath saltwater at several depths. The fact that thin silt layers caused such a significant impact opens new paths beyond this study both for coastal aquifer management (the possibility of transient pumping for freshwater resources) and marine ecology (expect diffuse groundwater discharge). |
| publishDate |
2022 |
| dc.date.none.fl_str_mv |
2022 2023 2023 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Postprint info:eu-repo/semantics/acceptedVersion |
| format |
article |
| status_str |
acceptedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/306744 https://api.elsevier.com/content/abstract/scopus_id/85124197418 |
| url |
http://hdl.handle.net/10261/306744 https://api.elsevier.com/content/abstract/scopus_id/85124197418 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Journal of Hydrology https://doi.org/10.1016/j.jhydrol.2022.127510 Sí |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
| dc.publisher.none.fl_str_mv |
Elsevier |
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Elsevier |
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reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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Consejo Superior de Investigaciones Científicas (CSIC) |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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1869409114815201280 |
| spelling |
A multidisciplinary approach to characterizing coastal alluvial aquifers to improve understanding of seawater intrusion and submarine groundwater dischargeMartínez-Pérez, LauraLuquot, LindaCarrera, JesúsMarazuela, Miguel ÁngelGoyetche, TybaudPool, MaríaPalacios, AndreaBellmunt, FabianLedo, JuanjoFerrer, Nuriadel Val, LauraPezard, Philippe A.García-Orellana, JordiDiego-Feliu, MarcRodellas, ValentíSaaltink, Maarten W.Vázquez-Suñé, EnricFolch, AlbertHydrogeochemistryBorehole geophysicsCoastal alluvial aquiferConceptual modelGeological heterogeneityhttp://metadata.un.org/sdg/6Ensure availability and sustainable management of water and sanitation for allCoastal aquifers are affected by seawater intrusion (SWI), which causes their salinization, and yield submarine groundwater discharge (SGD), which feeds marine ecosystems. Characterizing groundwater dynamics in coastal aquifers is fundamental for understanding both processes and their interaction. In order to gain insights into SWI and SGD, we developed a 100 m-scale experimental field site located in a coastal alluvial aquifer at the mouth of an ephemeral stream on the Maresme coastline (Barcelona, Spain). Given the complexity of coastal aquifers and the dynamism of the processes occurring therein, understanding of the coupled processes can be achieved by combining methods and approaches across different hydrogeological disciplines. In this study, we conduct a detailed aquifer characterization based on the four pillars of hydrogeology: geology (lithological description and core samples analyses), geophysics (downhole and cross-hole measurements), hydraulics (pumping and tidal response tests) and hydrochemistry (major and minor elements, together with stable and Ra isotopes). Each discipline contributed to the characterization of the aquifer: (1) geological characterization revealed that the aquifer consists of fluvial sediments, organized in fining upwards sequences with alternating layers of gravel, sand and silt; (2) geophysics helped in identifying silt layers and their continuity, which play a segmenting role in the aquifer hydrodynamics; (3) hydraulics tests, specifically tidal response tests, evidenced that tidal loading, rather than hydraulic connection to the sea, drives the tidal response; and (4) hydrochemistry revealed a surprising high reactivity, as most ions reflect some reaction, beyond the expected cation exchange. The summary is that the aquifer, which initially looked like a homogeneous unconfined aquifer 22 m thick, effectively behaves as a multi-aquifer and reactive system with freshwater discharging beneath saltwater at several depths. The fact that thin silt layers caused such a significant impact opens new paths beyond this study both for coastal aquifer management (the possibility of transient pumping for freshwater resources) and marine ecology (expect diffuse groundwater discharge).We acknowledge the contribution of all the members of the MEDISTRAES I, II and III project, from the Groundwater Hydrology Group of the Technical University of Catalonia (UPC) and the Spanish National Research Council (CSIC), the Autonomous University of Barcelona (UAB), the University of Barcelona (UB), the Geosciences Montpellier Laboratory, CNRS and the University of Rennes, for their support during experimental laboratory tests, the Argentona site creation, the setup of the electrodes during boreholes installation and for ensuring site maintenance. The final manuscript was significantly improved by critical, but constructive comments by two anonymous reviewers. This work was funded by the project PID2019-110212RB-C21, CGL2016-77122-C2-1-R/2-R and PID2019-110311RB-C22 of the Spanish Government and the project TerraMar (grant no. ACA210/18/00007) of the Catalan Water Agency. We would like to thank SIMMAR (Serveis Integrals de Manteniment del Maresme) and the Consell Comarcal del Maresme in the construction of the research site. This study contributes to the work carried out by the GHS (2017 SGR 1485) and MERS research group (2017 SGR 1588) for additional funding. M. Diego-Feliu acknowledges the economic support from the FI-2017 fellowships of the Generalitat de Catalunya autonomous government (2017FI_B_00365). V. Rodellas acknowledges financial support from the Beatriu de Pinós postdoctoral program of the Generalitat de Catalunya autonomous government (2019-BP-00241) The co-author Albert Folch is a Serra Húnter Fellow.Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/306744https://api.elsevier.com/content/abstract/scopus_id/85124197418reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésJournal of Hydrologyhttps://doi.org/10.1016/j.jhydrol.2022.127510Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3067442026-05-22T06:33:51Z |
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15.812429 |