Skip to main content
main-content
Top

Hint

Swipe to navigate through the articles of this issue

01-09-2020 | Original Article | Issue 18/2020

Environmental Earth Sciences 18/2020

Groundwater chemistry in Madeira Island (Portugal): main processes and contribution to the hydrogeological conceptual model

Journal:
Environmental Earth Sciences > Issue 18/2020
Authors:
Ana Luísa Fernandes, J. Virgílio Cruz, Celso Figueira, Susana Prada
Important notes

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Abstract

Groundwater resources are the main water supply source of Madeira Island, thus the characterization of the main hydrogeological mechanisms is vital for their sustainable management. Through the present study, a large hydrochemical dataset was analyzed by traditional and PCA analysis in light of the conceptual hydrogeological model of the island. Groundwater is mainly characterized by being low mineralized (mean EC = 128.6 µS/cm), cold (mean temperature = 13.4 °C) and slightly acidic (mean pH = 6.7). Springs draining local and small perched aquifer have low solute content and local flow path, while drilled wells, tapped in the basal aquifer near the coast, are more mineralized. Groundwaters are of the Na–HCO3, Mg–HCO3, Ca–HCO3 and Na–Cl types. The latter is found in some springs and in a few drilled wells. The hydrogeochemical and principal component analysis identify silicate weathering process as the most important factor involved in groundwater mineralization, as also CO2 dissolution and seawater spraying. Based on the 3H levels, most groundwaters have a significant component of modern recharge. Springs correspond to young waters, whilst waters in tunnels/galleries and drilled wells are mixtures of modern and submodern waters. The lower 3H concentration in these waters indicates longer residence time in the aquifers than spring water with higher levels and recent recharge. In general, flow paths are local and shallow. The interpretation of the chemical data in conjunction with 3H and δ18O data is in line with the conceptual model of Madeira Island proposed by Prada et al. (Comun Inst Geol Min 90:125–142, 2003; J Hydrol 536:409–425, 2016).

Please log in to get access to this content

To get access to this content you need the following product:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

  • über 69.000 Bücher
  • über 500 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Umwelt
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Maschinenbau + Werkstoffe
  • Versicherung + Risiko

Testen Sie jetzt 30 Tage kostenlos.

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

  • über 50.000 Bücher
  • über 380 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Umwelt
  • Maschinenbau + Werkstoffe




Testen Sie jetzt 30 Tage kostenlos.

Literature
About this article

Other articles of this Issue 18/2020

Environmental Earth Sciences 18/2020 Go to the issue