RT Journal Article
T1 Hydrological and geochemical processes constraining groundwater salinity in wetland areas related to evaporitic (karst) systems. A case study from Southern Spain
A1 Gil-Márquez, José Manuel
A1 Barberá-Fornell, Juan Antonio
A1 Andreo-Navarro, Bartolomé
A1 Mudarra-Martínez, Matías
K1 Aguas subterráneas - Análisis
AB Chemical and isotopic evolution of groundwater in an evaporite karst plateau (including wetland areas and saline to hyper-saline springs) located at S Spain was studied. Physicochemical parameters, major ions and stable isotopes were analyzed in rain, brine spring, wetland and leakage water samples, from which the most common mineral saturation indexes were computed and geochemical and isotopic modeling were performed. Results show an apparent relationship between the elevation of brine springs and their water mineralization, indicating that drainage at higher altitude may be associated to gravity-driven flows, since brackish groundwater is isotopically fractionated due to evaporation. On the other hand, the lower altitude springs could drain deeper flows with longer residence time, resulting in highly mineralized and warmer (briny) groundwater. The dissolution of halite and gypsum has proved to be the main geochemical processes, which are favored due by the great ionic strength of groundwater. Calcite precipitation occurs in brackish waters draining wetlands, being boosted by common ion effect (when CaSO4 waters are present) and solute concentration caused by evaporation. Modelling results strongly support the hypothesis that most of the selected springs geochemically evolve in a common (S-N) flowpath. The methods used in this research contribute to a better understanding of the hydrogeological processes occurring in the studied evaporitic system, but also in equivalent hydrological environments worldwide.
PB Elsevier
YR 2017
FD 2017
LK https://hdl.handle.net/10630/33366
UL https://hdl.handle.net/10630/33366
LA eng
NO Gil-Márquez, J.M., Barberá, J.A., Andreo, B. y Mudarra, M. (2017): Hydrological and geochemical processes constraining groundwater salinity in wetland areas related to evaporitic (karst) systems. A case from Southern Spain. Journal of Hydrology, 544: 538-554.
NO Artículo científico publicado en Journal of Hydrology (2017)
NO This work is a contribution to the Excellence Projects RNM-8087-11 and RNM-6895R-10 of the Autonomous Government of Andalusia (Spain), and to the Research Group RNM-308 of the Junta de Andalucía.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026