Identification of natural and anthropogenic geochemical processes determining the groundwater quality in Port del Comte high mountain karst aquifer (SE, Pyrenees)
| Autor: | Jorge Jódar, L.J. Lambán, David Parcerisa, Joan Agustí Núñez, Emilio Custodio, Joan Jorge-Sánchez, Albert Soler, Georgina Arnó, Ignasi Herms |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Doctorat en Recursos Naturals i Medi Ambient, Universitat Politècnica de Catalunya. Departament d'Enginyeria Minera, Industrial i TIC, Universitat Politècnica de Catalunya. GREMS - Grup de Recerca en Mineria Sostenible |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Water–rock interaction
Gypsum Geography Planning and Development Dolomite Geochemistry Karst stable isotopes Hydrogeology Aquifer Aquatic Science engineering.material Geogenic and anthropogenic contamination Hidrogeologia Biochemistry Natural (archaeology) Enginyeria civil::Geologia::Hidrologia subterrània [Àrees temàtiques de la UPC] Catalonian pyrenees (Catalonia) Inverse modelling Pirineu català (Catalunya) TD201-500 Water Science and Technology Stable isotopes Carst geography geography.geographical_feature_category Water supply for domestic and industrial purposes karst system water–rock interaction inverse modelling Hydraulic engineering geogenic and anthropogenic contamination Aquifers Aqüífers engineering Environmental science Halite high-mountain High-mountain Port del Comte Massif TC1-978 Groundwater Karst system |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Water Volume 13 Issue 20 Water, Vol 13, Iss 2891, p 2891 (2021) Dipòsit Digital de la UB Universidad de Barcelona |
| DOI: | 10.3390/w13202891 |
| Popis: | The Port del Comte Massif (SE, Pyrenees) contains one of the most important vulnerable and strategic karst aquifers for supplying freshwater to the city of Barcelona (Spain). It is a fragile system, whose possible environmental impact is highly conditioned by land use. To improve the hydrogeological knowledge of the system, between September 2013 and October 2015, a detailed fieldwork was carried out for the revision of the geological model, the inventory of water points, and the in situ physico-chemical characterization on major elements and isotopes of up to a total of 43 springs, as well as precipitation water. This paper focuses on the characterization of the geochemical processes that allow explanation of the observed chemical variability of groundwater drained by the pristine aquifer system to determine the origin of salinity. The results show that the main process is the dissolution of calcite and dolomite, followed by gypsum and halite, and a minor cation exchange-like process. Sulfur and oxygen isotopes from dissolved sulfate in the studied springs point out a geogenic origin related to the dissolution of gypsum from Triassic and Tertiary materials, and that the contribution from anthropogenic sources, like fertilizers, is lower. Nitrate in groundwater is not an important issue, with a few localized cases related with agricultural activities. The multidisciplinary approach has allowed the development of a consistent hydrogeological conceptual model of the functioning of the aquifer system, which can be replicated in other places to understand the geogenic character of the hydrogeochemistry. |
| Databáze: | OpenAIRE |
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