Hydrogeological characterization of heterogeneous volcanic aquifers in the Canary Islands using recession analysis of deep water gallery discharge
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http://hdl.handle.net/10045/124161
Títol: | Hydrogeological characterization of heterogeneous volcanic aquifers in the Canary Islands using recession analysis of deep water gallery discharge |
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Autors: | Poncela, Roberto | Santamarta Cerezal, Juan Carlos | García-Gil, Alejandro | Cruz-Pérez, Noelia | Skupien, Elzbieta | Garcia-Barba, Javier |
Grups d'investigació o GITE: | Ingeniería del Terreno y sus Estructuras (InTerEs) |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Ingeniería Civil |
Paraules clau: | Canary Islands | Groundwater | Hydraulic diffusivity | Hydrology | Hydrological processes | Volcanic aquifers |
Àrees de coneixement: | Ingeniería del Terreno |
Data de publicació: | 28-de maig-2022 |
Editor: | Elsevier |
Citació bibliogràfica: | Journal of Hydrology. 2022, 610: 127975. https://doi.org/10.1016/j.jhydrol.2022.127975 |
Resum: | Aquifers constitute the main freshwater supply of oceanic islands. Maintaining groundwater quantity and quality is of critical concern as demographic and climatic changes place additional pressures on already fragile water resources systems. Islands with heterogeneous volcanic aquifers pose additional difficulties in assessing their water resources. This work proposes an approach for improving the hydrogeological characterization of heterogeneous volcanic aquifer systems by making use of recession coefficients from deep water gallery discharge. To demonstrate the usefulness of this approach, hydrographs and recession curves from groundwater discharge of 30 water galleries on La Palma (Canary Islands) were evaluated. This analysis allowed us to obtain the main hydrogeological parameters of a volcanic aquifer system, in terms of hydraulic diffusivity. A Maillet-Boussinesq model with an exponential decay law was adopted, according to field observations of drainage discharge. The alpha coefficients of recession values ranged between 10−3 and 4·10−4 day−1 and showed significant spatial correlation with insular geology. Additionally, hydraulic diffusivity values of island hydrogeological domains were obtained from recession coefficients using the Rorabaugh-Singh method. Weighted storage coefficients for volcanic materials were in the range of 3% to 7%, with an average transmissivity in the range of 15 to 150 m2·day−1. The methodology proposed has demonstrated its usefulness in coping with local uncertainty in hydraulic characterization of insular aquifers associated with volcanic heterogeneity. This is an improvement compared to standard pumping tests, thus providing hydraulic parameters prior to numerical analysis for water management planning. |
Patrocinadors: | This research was partially supported by the European Union's Horizon 2020 research and innovation programme under grant agreement 101037424, project ARSINOE (Climate resilient regions through systemic solutions and innovations), and the Spanish Research Agency (project SAGE4CAN PID2020-114218RA-100). |
URI: | http://hdl.handle.net/10045/124161 |
ISSN: | 0022-1694 (Print) | 1879-2707 (Online) |
DOI: | 10.1016/j.jhydrol.2022.127975 |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Drets: | © 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
Revisió científica: | si |
Versió de l'editor: | https://doi.org/10.1016/j.jhydrol.2022.127975 |
Apareix a la col·lecció: | Investigacions finançades per la UE INV - INTERES - Artículos de Revistas |
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Arxiu | Descripció | Tamany | Format | |
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Poncela_etal_2022_JHydrology.pdf | 10,74 MB | Adobe PDF | Obrir Vista prèvia | |
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